Choose all the statements that are true about the RNA world hypothesis. There may be more than one correct statement.
A. According to this hypothesis, the first genomes were RNA.
B. According to this hypothesis, RNA catalysts were eventually replaced by protein catalysts.
C. According to this hypothesis, the first catalysts were RNA.
D. According to this hypothesis, RNA evolved after DNA to allow the transfer of information from DNA to proteins.
E. The function of reverse transcriptase provides evidence that RNA genomes can be converted to DNA.
Answers
The true statements about the RNA world hypothesis are:
A. According to this hypothesis, the first genomes were RNA.
C. According to this hypothesis, the first catalysts were RNA.
E. The function of reverse transcriptase provides evidence that RNA genomes can be converted to DNA.
What is RNA world hypothesis?The RNA world hypothesis is the scientific hypothesis that explains how life originated on Earth. This hypothesis proposes that RNA (ribonucleic acid) had the capability to self-replicate and mutate, making it the first genetic material, and that all life on Earth descended from it. It proposes that RNA served as a chemical ancestor of DNA (deoxyribonucleic acid) and proteins, both of which are essential building blocks of life.
Based on the given statements the corrects are:
A. According to this hypothesis, the first genomes were RNA.
C. According to this hypothesis, the first catalysts were RNA.
E. The function of reverse transcriptase provides evidence that RNA genomes can be converted to DNA.
To know more about RNA world hypothesis
brainly.com/question/28235283
#SPJ11
Related Questions
what is the function of the highlighted structure? supplies somatic sensory fibers to chochlea supplies proprioceptive impulses from the medial rectus to the brain supplies somatic motor fibers to the lateral rectus muscle supplies somatic motor fibers to the chewing muscles
Answers
The function of the highlighted structure is option A: to supply cochlea with somatic sensory fibers.
The cochlea receives somatic sensory fibers from the highlighted structure. All spinal nerves, with the possible exception of the first cervical, contain somatic sensory fibers, which are afferent fibers that develop from neurons in sensory ganglia.
They transmit impulses of pain, touch, and temperature from the body's surface through the dorsal roots to the spinal cord as well as impulses of muscle, tendon, and joint sense from the deeper structures.
Motor and sensory impulses are sent to and from the central nervous system (CNS) by the somatic nervous system. We are able to regulate our physical movements and process four of the five senses—smell, sound, taste, and touch—thanks to this physiological system.
To know more about sensory nerves, refer:
https://brainly.com/question/16958353
#SPJ4
Correct question is:
What is the function of the highlighted structure? Refer the image.
supplies somatic sensory fibers to cochlea
supplies proprioceptive impulses from the medial rectus to the brain
supplies somatic motor fibers to the lateral rectus muscle
supplies somatic motor fibers to the chewing muscles
If a molecule is to large or polar and cannot easily diffuse into the cell, it is
considered to be
to the membrane.
permeable
impermeable
hydrophilic
phospholipid
Answers
Answer:
hydrophilic
Explanation:
Large polar or ionic molecules, which are hydrophilic, cannot easily cross the phospholipid bilayer. Charged atoms or molecules of any size cannot cross the cell membrane via simple diffusion as the charges are repelled by the hydrophobic tails in the interior of the phospholipid bilayer.
Which of the following is true about why we eat? Choose all that apply
We need to eat so we can create waste products.
We need building blocks for our body.
We need to eat so we can reduce our levels of oxygen.
We need fuel.
Which option^ help
Answers
We eat food for several reasons, and two of them are for building blocks for our bodies and for fuel. The second and last options are correct.
Food provides us with energy in the form of calories, which are essential for the functioning of our cells, tissues, and organs.
Our food provides essential nutrients such as proteins, carbohydrates, fats, vitamins, and minerals. These nutrients are necessary for our body's growth, maintenance, and repair. Proteins are the building blocks of our body tissues, while carbohydrates and fats provide energy and support various bodily functions.
The energy obtained from food is utilized for various physiological processes, such as metabolism, movement, and maintaining body temperature.
While digestion and metabolism do produce waste products, such as carbon dioxide and urea, creating waste products is not the primary purpose of eating.
Food provides us with essential nutrients, including proteins, carbohydrates, fats, vitamins, and minerals, which serve as building blocks for our body's growth, repair, and maintenance.
Eating does not directly impact the levels of oxygen in our bodies. Oxygen is primarily obtained through the process of breathing, and the consumption of food does not play a role in reducing oxygen levels.
Thus, the second and last options are correct.
To know more about Food, click here:
https://brainly.com/question/32109606
#SPJ4
How are the agents of weathering similar and different.
Answers
Answer:
Water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. ... Rocks, such as lavas, that are quickly buried beneath other rocks are less vulnerable to weathering and erosion than rocks that are exposed to agents such as wind and water.
Physical weathering breaks down rocks without changing their proportion, whereas chemical weathering changes the ingredients that cause up the rocks. Depending on the chemicals used, the rock may completely disintegrate or simply become softer and more susceptible to other forms of weathering.
What is weathering?Weathering occurs when rocks, land formations, and minerals begin to break down and dissolve.
The process of erosion transports these broken bits away by wind or rain after they crumble.
Weathering agents include ice, salts, water, wind, and plants and animals. Road salt and acids are examples of chemical weathering because they contribute to the erosion of rocks and minerals.
Thus, these are some of the similarity and differences of weathering.
For more details regarding weathering, visit:
https://brainly.com/question/14426457
#SPJ2
what is Amber made up of?
Answers
Answer:
Amber, which is in fact a fossil, is often held in the same class as semi-precious stones such as turquoise and jade because of its ornamental uses. Unlike these stones, amber is not mineralized. Rather, it is simply the fossil of resin. Most that exists today is between 30 and 90 million years old. derived from the resin of extinct species of trees.
Explanation:
What is a biome and why is it important to protect all kinds of biomes?
Answers
Answer:
a biome is a community with distinct climates for organisms both plant and animals.
Explanation:
When a biome is destroyed, food sources for many organisms are lost, as well as their habitat. many species will become endangered or extinct. as ome species become extinct it causes a chain reactiom affect many other species to become endangered and the nature will fail to balance. losing a biome causes loss of many plantatioms which many lead to more CO2 in the atmosphere and hence global warming. global warming casue draught, famine and again, loss of many species and even spread of diseases.
the three main types of scientific investigations are descriptive, comparative, and experimental. Which components are included in all three types of investigations?
Answers
Answer:
testing a hypothesis
Explanation:
The breakdown of food takes place in the mouth, stomach and small intestine. Name the type of digestion for which the teeth in the mouth are responsible.
Answers
Mechanical Digestion is a type of digestion for which the teeth in the mouth are responsible. It consists of chewing the food.
☁ 좋은 하루 되세요!! ☁ -HunnyPeachyLesson 3.01 (Page 1) talks about the different kids of ecosystem
succession.
If primary succession occurred would turtles be able to nest there?
What about secondary succession? (hint: what is the difference
between the 2?)
Answers
Answer:
In primary succession, newly exposed or newly formed rock is colonized by living things for the first time. In secondary succession, an area that was previously occupied by living things is disturbed, then re-colonized following the disturbance.
Explanation:
Hope this helps
With Mitosis, The daughter cells are genetically___?
Answers
Answer:
With mitosis, the daughter cells are genetically identical to each other, and to the parent cell.
Explanation:
The process in which a single parent cell divides into two new genetically identical daughter cells having the same amount of chromosomes as that of parent cell is called mitosis.
the only phylum that shows active flight in invertebrates is
coelenterata
arthropoda
mollusca
echinodermata
Answers
Answer:
It would be arthropoda
Explanation:
Insects and arthropods are the only invertebrates able to fly since insects are not a part of your list arthropoda would be the answer. I hope this helps and if you can give me brainliest? :)
Which conclusion can be drawn based on examining fossil evidence of pollen in an area?
A. whether or not the area experienced volcanic eruptions
B. what the climate was like in the area long ago
C. how erosion and uplift has changed the landscape
D. how diverse the animal life was in the area
Answers
Answer:
B. What the climate was like in the area long ago.
Explanation:
All flowering plants produce pollen grains with distinctive shapes that change as climatic factors change as plants are generally distributed based on patterns of temperature and precipitation. So, fossil pollen records can tell us about the past climate.
A community cannot be termed healthy unless each of its individual is healthy. comment on this statement.
Answers
Answer:
this statement does not make sense to me, but ok.
Explanation:
;/
Answer:
you neeed everyone to be healthy before you state that everyones healthy
Explanation:
Describe the journey of an oxygen atom from the air into a muscle cell in your leg and back into the air.
(Pls help)
Answers
Answer:
1. An oxygen atom in the air is inhaled by the lungs and enters the bloodstream.
2. The oxygen atom is then transported by the red blood cells to the muscle cells in the leg.
3. Once the oxygen atom reaches the muscle cells, it is used to create energy for the cell.
4. The oxygen atom is then converted into carbon dioxide and is released back into the bloodstream.
5. The carbon dioxide is then transported back to the lungs where it is exhaled and released back into the air.
It takes several steps for an oxygen atom to get from the air to a muscle cell in your leg and back to the air.
When you breathe in, oxygen travels to your lungs, where it diffuses through the alveoli into your bloodstream. Through the vascular system, it travels to the muscle cells of the leg after binding to the hemoglobin in the red blood cells.
In muscle cells, oxygen is used in the process of cellular respiration to create ATP, which serves as a source of energy for muscle contraction. Carbon dioxide is produced as a waste product of cellular respiration. Circulation carries carbon dioxide back to the lungs as it diffuses out of the muscle cells. Expelled from the body through exhalation, carbon dioxide completes its journey.
Learn more about muscle cells, here:
https://brainly.com/question/30972407
#SPJ2
Dna is the instructions manual for a living thing. Each time one of your cells divide , your dna is copied. That way, each new cell has its own copy of the instruction manual.On the line below,list some items that come with instructions
Answers
Answer:
DNA is the hereditary material in humans and almost all other ... Human DNA consists of about 3 billion bases, and more than 99 ... for building and maintaining an organism, similar to the way in which ... is critical when cells divide because each new cell needs to have an ... Thank you for your feedback!
Explanation:
Dna la me la traga fuerte mi monda
Answer:
A recipe book
A job
Or even also a science project
1. Name 5 simple crochet stiches.
Answers
Explanation:
Single Crochet Stitch.
Double Crochet Stitch.
Half Double Crochet Stitch.
Treble Crochet Stitch.
Slip Stitch Crochet.
Half double crochet
Double crochet
Single crochet
Chain stitch
how does carbon moves from the atmosphere to the biosphere?
Answers
Answer:
Via a range of pathways, carbon travels from one storage reservoir to another. In the food chain, for example, plants, by photosynthesis, transfer carbon from the atmosphere into the biosphere. Respiration, excretion, and decomposition release the fuel, continuing the cycle, back into the atmosphere or soil.
Explanation:
How many species are found in a community?
Answers
Photosynthesis is a chemical reaction that occurs in the __________, an organelle found only in plant cells. The reactants of photosynthesis are __________, carbon dioxide, and water. The _________ of photosynthesis are glucose and oxygen
Answers
Answer:
The correct answer is - a) chloroplast 2) sunlight 3) products
Explanation:
Photosynthesis is the process that includes a set o chemical reaction that takes place inside the green plants and other photosynthetic organisms. These green plants or photosynthetic organisms have a special cell organelle known as chloroplast present in plant cells only that has a pigment called chlorophyll that is essential for photosynthesis.
Photosynthesis is a complex process but it can be understood as the reactants of this process that are sunlight, water, and carbon dioxide produces glucose and oxygen.
The control center in a cell is called ______________.
A: nucleus
B: mitochondria
C: cytoplasm
D: none of the above
Answers
Answer:
A.nucleus
Explanation:
The control center of in a cell is called nucleus
Question 1: Basic Solow Growth Model Consider the Solow growth model without population growth or technological change. All the assumption of basic Solow Growth model applies (the ones we discussed in class). The saving rate is given by s and and the depreciation rate is given by (δ). The production function is given by Y=K
α
L
(1−α)
. Let k denote capital per worker, y denote output per worker, c denote consumption per worker, and i denote investment per worker. 1. What is the per-worker production function? 2. Provide equation of motion for this model. 3. Find the steady-state capital per worker (k
∗
). 4. Find the steady-state level of output per worker (y
∗
). 5. Find the steady-state level of consumption per worker (c
∗
). 6. Draw a well-labeled figure showing steady state capital per worker, steady state output per worker, and steady-state consumption per worker. (You will not receive full credit if it is not well-labeled) 7. In your own words, explain two implications of this Basic Solow Growth Model (no population growth and no technological growth).
Answers
1.The per-worker production function in the Basic Solow Growth Model can be written as: Y = K * α * L * (1 - α)
where Y is output per worker, K is capital per worker, L is labor, and α is the elasticity of output with respect to capital. 2.The equation of motion for this model is: dY/dt = s(Y-c) - (δ+1)K. where s is the savings rate, c is consumption per worker, δ is the depreciation rate, and t is time.
3.The steady-state capital per worker (k∗) is given by:
k∗ = δ + 1
4.The steady-state level of output per worker (y∗) is given by:
y∗ = αk∗L
where α is the elasticity of output with respect to capital.
5.The steady-state level of consumption per worker (c∗) is given by:
c∗ = s(y∗-L)
6.A well-labeled figure showing steady state capital per worker, steady state output per worker, and steady-state consumption per worker would include the following:
Steady-state capital per worker (k∗) on the x-axis and steady-state output per worker (y∗) on the y-axis.
A line showing the relationship between capital and output in the steady state.
A point representing the steady-state level of capital per worker (k∗) and a point representing the steady-state level of output per worker (y∗).
A line showing the relationship between consumption and output in the steady state.
A point representing the steady-state level of consumption per worker (c∗) and a point representing the steady-state level of output per worker (y∗).
Labels for each point and line, including the variables they represent and the equations that relate them.
7.The implications of the Basic Solow Growth Model with no population growth and no technological growth are:
The economy grows at a constant rate determined by the rate of return on investment in capital.
The steady-state level of output per worker is determined by the elasticity of output with respect to capital and the level of capital per worker.
The steady-state level of consumption per worker is determined by the savings rate and the level of output per worker.
The model predicts that there is a positive relationship between capital and output, and a negative relationship between consumption and output in the steady state.
Learn more about Basic Solow Growth Model Visit : brainly.com/question/13351371
#SPJ11
Dogwood and oak trees are two kinds of plants found in a forest. These trees and other forest plants get the energy they need for making food from blank , which the plants use to produce sugar.
fill in the blank
Answers
Answer:
The sun / The UV lights that the sun emit
Explanation:
Dogwood and oak trees are two kinds of plants found in a forest. These trees and other forest plants get the energy they need for making food from Sun that is the solar energy which the plants use to produce sugar. Sun is the basic source that is used for photosynthesis.
What is the end product of photosynthesis ?Glucose is the end product of photosynthesis which is the ultimate source of energy for plants.
Photosynthesis usually takes place in 4 steps where the first step is the absorption of light where the light from sun is absorbed by stomata and the various reactions that take place in the light are called as the light reactions.
Transfer of light helps to electrons to excite and the excitation of electrons helps to make new products various phosophorylation reactions that is the production of ATP is taking place or the lysis of the product is taking place as well.
Learn more about photosynthesis at :
https://brainly.com/question/1757345
#SPJ2
Please help
Show the overall process and explain the benefits of using hydrilla plant to test for oxygen extraction
Answers
How are ribosomes recycled following the termination of translation?
Answers
Ribosomes are essential organelles that function as protein synthesis factories in all living cells.
Following the termination of translation, ribosomes must be removed from the mRNA molecule and recycled to perform additional rounds of translation. The process of recycling ribosomes includes several steps, including the separation of the two ribosomal subunits, disassembly of the polypeptide chain, and recycling of the ribosomal RNA and protein components.
Ribosomes are the macromolecular structures that function as protein synthesis factories in all living cells. Following the termination of translation, ribosomes must be disassembled and recycled to maintain the efficiency of protein synthesis. Ribosome recycling is a complex process that involves the separation of the two ribosomal subunits, disassembly of the polypeptide chain, and recycling of the ribosomal RNA and protein components.The first step in ribosome recycling is the separation of the two ribosomal subunits. In prokaryotes, this process is mediated by the ribosome recycling factor (RRF), which binds to the A site of the ribosome and disrupts the interaction between the ribosomal subunits. In eukaryotes, the separation of the subunits is mediated by the ATPase ABCE1. ABCE1 binds to the decoding site of the ribosome and uses ATP hydrolysis to promote the separation of the two subunits.Once the two subunits are separated, the polypeptide chain must be released from the ribosome. In prokaryotes, this process is mediated by the release factors RF1 and RF2, which bind to the A site of the ribosome and stimulate the hydrolysis of the peptidyl-tRNA bond. In eukaryotes, the polypeptide chain is released from the ribosome by the release factor eRF1, which recognizes the stop codon and stimulates the hydrolysis of the peptidyl-tRNA bond.Once the polypeptide chain has been released from the ribosome, the ribosomal RNA and protein components must be recycled. In prokaryotes, the ribosomal RNA and protein components are dissociated by the action of ribonuclease RNase R and proteases such as ClpXP. In eukaryotes, the ribosomal RNA and protein components are recycled by the 40S ribosome subunit export (No-Go) decay (NGD) pathway and the Quality Control of Terminated Nascent Peptides (QTNP) pathway.
Ribosome recycling is a critical process that enables the efficient synthesis of proteins in all living cells. The process involves the separation of the two ribosomal subunits, disassembly of the polypeptide chain, and recycling of the ribosomal RNA and protein components. In prokaryotes, the process is mediated by the ribosome recycling factor (RRF) and ribonuclease RNase R, while in eukaryotes, the process is mediated by the ATPase ABCE1, the release factor eRF1, and the 40S ribosome subunit export (No-Go) decay (NGD) pathway and the Quality Control of Terminated Nascent Peptides (QTNP) pathway.
To know more about translation visit:
brainly.com/question/13522111
#SPJ11
How is The environment on Mars different from that of Earth’s?
(I need at at least 5 sentences) (50 pts)
Answers
Answer:
Mars is about half the size of Earth by diameter and has a much thinner atmosphere, with an atmospheric volume less than 1% of Earth's. The atmosphere of Mars is about 100 times thinner than Earth's, and it is 95 percent carbon dioxide.The atmospheric composition is also significantly different: primarily carbon dioxide-based, while Earth's is rich in nitrogen and oxygen.Because of the differences in atmospheric densities and distances from the sun, the temperature within the atmosphere are also wildly different. Earth generally ranges from 14 degrees Celsius to 70.0 degrees, whereas Mars ranges from -146 degrees C to -140 degrees C.Both planets have a silicate mantle surrounding their cores and a surface crust of solid material. Earth and Mars’ both have terrains that varies considerably from place to place.Explanation:
Answer:
1) Atmosphere on mars is about 100 times thinner than earths. it also contains 95% Carbon dioxide
2)Mars is very cold. Average temperature = -80°F
3) Mars has reduced gravity.
4)Mars has a rocky and sandy surface and is dry.(although there was a time they said water was found on it. but i am not really sure)
5)Red dust covers most of its surface
6) Large storms can sometimes cover the entire planet
Hair-like structure that attaches the cell to a surface and can transfer genetic material from one cell to another.
Answers
Hair-like structure that attaches the cell to a surface and can transfer genetic material from one cell to another is called as fimbriae or pili
Bacterial cells' surfaces frequently have fimbriae and pili. Short, hair-like projections called fimbriae are used by bacteria to adhere to surfaces or other cells. Pili are similar structures that can help a bacterium move or transfer DNA to another bacterium, among other things. Many bacteria can move or locomote by using a whip-like structure called a flagellum (or flagella, if they have more than one).
Fimbriae or pili are proteins in nature. Fimbriae are formed by a pilin kind of protein.
For more information on fimbriae kindly visit to
https://brainly.com/question/28240322
#SPJ4
Why do more chromosomes result in increased recombination?
Answers
More chromosomes result in increased recombination because they are involved in crossovers which results in recombination and the exchange of genetic material between the maternal and paternal chromosomes.
What is a Chromosome?This is referred to as a threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes.
They are involved in crossovers which is why in a scenario where there are more chromosomes then there is increased recombination thereby making it the correct choice.
Read more about Chromosome here https://brainly.com/question/13148765
#SPJ1
The ___ of water molecules and the hydrogen bonds between water molecules explain most of water's life-supporting properties.
The ___ of water molecules to each other helps transport water from the roots to the leaves on plants.
When water warms or cools, ____ either break or form.
Thus, water absorbs or releases a great deal of ____, helping to moderate temperatures.
Water is a versatile ____.
Blood and other biological fluids are aqueous solutions with a diversity of dissolved ______.
Answers
Answer:
The polarity of water molecules and the hydrogen bonds between water molecules explain most of water's life-supporting properties.
The cohesion of water molecules to each other helps transport water from the roots to the leaves on plants.
When water warms or cools, hydrogen bonds either break or form.
Thus, water absorbs or releases a great deal of heat, helping to moderate temperatures.
Water is a versatile solvent.
Blood and other biological fluids are aqueous solutions with a diversity of dissolved solutes.
Explanation:
The sentences presented in the question above had their various spaces complemented by the words that best fit the sentence and that were capable of forming true invormations on water.
Water is a very versatile solvent as it is capable of dissolving and mixing with various substances both liquid and solid. Furthermore, water has a great capacity to absorb or release heat, which is very useful for the entire planet, as this allows water to be very efficient in regulating temperature.
Water is formed by H2O molecules, which hold these molecules together are the hydrogen bridges formed between them. Hydrogen bridges are broken through heat, which allows the water to evaporate, but at low temperatures these bridges are strengthened and new bridges can be created, which allows the water to become solid.
The properties of water are extremely important for life on the planet and for most biological processes we know about. Among these properties we can mention polarity and cohesion as one of the most important. Polarity allows water to be a polar substance, while cohesion allows water to create an attractive relationship between molecules.
Which word best describes the rock’s grain shape? jagged oval round smooth.
Answers
The word that best describes the rock's grain shape is jagged.
What do you mean by the Rock's grain shape?
It significantly defines the structural arrangement of a granular mass within a rock.
In some rocks, the grain shape results from the shapes of crystals that form the rock. While in some other rocks, the grain shape results from the fragments of other rocks that can be considered as round, smooth, and sometimes jagged.
Therefore, the word that best describes the rock's grain shape is jagged.
To learn more about Rocks and its properties, refer to the link:
https://brainly.com/question/12062064
Answer: A
Explanation i just took the test
pls help and explain if can
Answers
The distance of the light source to the plant can be adjusted.
How can light intensity be varied in a photosynthesis experiment?Light intensity can be varied in a photosynthesis experiment by controlling the distance between the light source and the plant or algae being studied, adjusting the size of the light source, or using filters or other optical devices to modify the light that reaches the sample.
One common method of controlling light intensity is to adjust the distance between the light source and the sample. As the distance increases, the light intensity decreases. By carefully controlling the distance between the light source and the sample, researchers can precisely control the light intensity and observe the effect on photosynthesis.
Learn more about photosynthesis:https://brainly.com/question/29764662
#SPJ1