tiktaalik represents a group of animals intermediate between ________ and __________.
Answers
Tiktaalik represents a group of animals intermediate between fish and tetrapods. The discovery of Tiktaalik contributes to our understanding of the evolutionary processes that led to the colonization of land by vertebrate organisms.
Tiktaalik is an extinct genus of sarcopterygian (lobe-finned) fish that lived approximately 375 million years ago during the Late Devonian period. It is considered a significant transitional fossil because it exhibits characteristics of both fish and tetrapods (four-limbed vertebrates).
Tiktaalik possessed fish-like features such as scales, fins, gills, and a fish-like tail, indicating its aquatic nature. However, it also had tetrapod-like features, including a neck, robust forelimbs with a wrist joint, and a flat skull with eyes on top, suggesting it had the ability to support itself and move in shallow water or on land.
These combined characteristics make Tiktaalik an excellent example of an intermediate form between fish and tetrapods, providing valuable insights into the evolution of vertebrates from aquatic to terrestrial habitats. It represents a crucial step in the transition from finned fish to the emergence of early tetrapods, eventually leading to the evolution of land-dwelling vertebrates.
Tiktaalik occupies a significant place in the evolutionary history of vertebrates, serving as an intermediate form between fish and tetrapods. Its combination of fish-like and tetrapod-like features provides valuable evidence for the transition from aquatic to terrestrial habitats and sheds light on the early stages of limb evolution in vertebrates. The discovery of Tiktaalik contributes to our understanding of the evolutionary processes that led to the colonization of land by vertebrate organisms.
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Related Questions
¿Pueden los icebergs ser considerados como
un tipo de glaciar?
Answers
Answer:
La diferencia entre un iceberg y un glaciar es que el iceberg es la pieza de un glaciar que se desprende (o se rompe) cuando las temperaturas suben. Los glaciares están formados por una gran masa de mezcla de nieve y hielo que cubre el fondo del valle de una cadena montañosa.
Explanation:
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Question 7 (8 points)
Biological evolution is the process by which populations of organisms change over time. In this lab, you
were able to observe how a population of peppered moths can change based on their environmental
surroundings. How do you think this could lead to evolution?
Answers
place the following steps of polysaccharide chain cleavage by lysozyme into the correct order. 1) Lysozyme and products dissociate 2) Lysozyme and substrate form an enzyme-substrate complex, forcing one sugar molecule into a strained conformation. 3) Glutamic acid donates a proton to one sugar as aspartic acid attacks the C1 carbon of a second sugar. 4) Glutamic acid donates a proton to one sugar as aspartic acid attacks the C1 carbon of a second sugar. 5) The water oxygen attacks the C1 carbon, breaking the sugar- aspartate bond. 6)Glutamic acid polarizes a water molecule, drawing a proton away from the water. 7) A covalent bond forms between the aspartic acid and the sugar, and the sugar-sugar bond is hydrolyzed.
Answers
Lysozyme and substrate form an enzyme-substrate complex, forcing one sugar molecule into a strained conformation. Glutamic acid donates a proton to one sugar as aspartic acid attacks the C1 carbon of a second sugar.
A covalent bond forms between the aspartic acid and the sugar, and the sugar-sugar bond is hydrolyzed. The water oxygen attacks the C1 carbon, breaking the sugar-aspartate bond. Glutamic acid polarizes a water molecule, drawing a proton away from the water. Lysozyme and products dissociate. The correct order of steps of polysaccharide chain cleavage by lysozyme are as follows: Lysozyme and substrate form an enzyme-substrate complex, forcing one sugar molecule into a strained conformation. Glutamic acid donates a proton to one sugar as aspartic acid attacks the C1 carbon of a second sugar.
A covalent bond forms between the aspartic acid and the sugar, and the sugar-sugar bond is hydrolyzed. The water oxygen attacks the C1 carbon, breaking the sugar-aspartate bond. Glutamic acid polarizes a water molecule, drawing a proton away from the water. Lysozyme and products dissociate. Lysozyme is an enzyme that breaks down glycosidic bonds in bacterial cell walls. The enzyme binds to a sugar molecule in the substrate and rearranges it into a strained conformation when it binds to it .The enzyme's glutamic acid donates a proton to one sugar in the substrate, while its aspartic acid attacks the C1 carbon of a second sugar. A covalent bond forms between the aspartic acid and the sugar, breaking the sugar-sugar bond.
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In rats, rough fur (R) is dominant over smooth fur (r) and black fur (B) is dominant over brown fur (b). Which of the following describes a rat with the genotype RRBb?
Answers
Explain the roles of vitamins and minerals in the process of
maintaining homeostasis.
Answers
Answer:
Micronutrients
Explanation:
micronutrients (vitamins and minerals) have a roles in numerous homeostatic process enabling the body to produce enzymes hormones and other substance that are essential for energy production cell maintenance and repair immune function and recovery from illness blood formation and maintenance of vital organ
Part 2: Based on the following genotypes, determine the phenotype.
6. In humans, tongue rolling is dominant to not being able to roll the tongue.
TT=
Tt=
7. In humans, mid-finger hair is dominant to no mid-finger hair.
HH =
Hh=
8. In humans, cleft chin is dominant to no cleft chin.
Cc =
CC=
ll norrible genotypes.
hh=
сс
Answers
The genotype of the child will be rr, which is homozygous recessive based on the genetic cross. As a result, the youngster will be unable to roll their tongue since they lack the dominant allele.
If tongue rolling is dominant, what is the genotype of a tongue roller?A person with the Rr genotype for tongue rolling can roll his or her tongue since the dominant gene that facilitates tongue rolling is present.
The dominant gene, T, controls tongue rolling, whereas the recessive allele, t, controls non-rolling. A -linked gene on the X chromosome controls red-green colour blindness.
As a result, offspring have a 0% probability of having the tongue rolling personality.
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Why might a scientist use a physical model of an animal cell instead ofstudying the cell directly?OA. Most scientists prefer to work with models rather than real-lifeobjects.OB. Animal cells are too difficult to find and can be observed onlyindirectly.OC. The model will give more accurate results than studying an actualcell.OD. A physical model is easier to manipulate and shows tiny detailsmore clearly.
Answers
A scientist might use a physical model of an animal cell instead of studying the cell directly because a physical model is easier to manipulate and shows tiny details more clearly. Even though cell tissues are difficult to maintain in lab conditions, results would be more accurate.
The correct answer is option D.
PLEASE QUICK!!!!
Complete the analogy
Cells : _______ :: Species : Population
Answers
Answer:
There are more but there is only one blank so,
The answer should be Organism (?)
Which group, named from their cuplike sexual reproductive asocarp, make up 75% of know fungi?
Answers
Answer: Sac Fungi, or Ascomycota.
Explanation: This type of fungi has cupcake asocarp.
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Process of change by which descendants come to differ from their ancestors
A. Evolution
B. Natural Selection
C. Phenotype
D. Variation
Answers
Evolution is the biological change process by which descendants come to differ from their ancestors.
What is the name of the cell organelle that destroys the worn-out cell organelles or even the whole cell?
Answers
The organelle responsible for destroying worn-out cell organelles or even the whole cell is called the lysosome.
Lysosomes are membrane-bound organelles that contain digestive enzymes capable of breaking down various biomolecules, including proteins, lipids, nucleic acids, and carbohydrates. The enzymes within the lysosome function optimally in acidic environments and can hydrolyze macromolecules into smaller subunits that can be recycled by the cell.
In addition to removing cellular waste, lysosomes also play a role in various cellular processes, such as autophagy, where the cell degrades its own components to recycle materials and maintain homeostasis.
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Pick one of the following misconceptions from the list below.
Write a 3 to 5 sentence statement to correct it.
Explain the error in the misconception and provide evidence, examples, or facts to support the correct answer.
If your explanation does not include specific details/facts and is constructed with vague statements, you will not receive points.
Use the information from the lessons to find supporting details.
Misconceptions- Pick ONE
weather and climate are the same thing
cold or unusually cool weather is proof that global warming is not really happening
human activity cannot change climate because the atmosphere and Earth itself are so big
Answers
The burning of fossil fuels, logging of forests, and raising of livestock all have a rising impact on the climate and temperature of the planet. This increases the greenhouse effect it causes global warming atmosphere.
Does the definition of climate and weather overlap?When you go outside on every given day, you encounter the weather. In those other words, it refers to the short-term atmosphere at a certain region. The average of a place's weather patterns over a longer time frame, typically 30 years or more, is called the climate.
How does anthropogenic climate change get destroyed?The amount of greenhouse gases, aerosols (small particles), or cloudiness in the Earth's atmosphere change as a result of human activities, which also contribute to climate change. Burning fossil fuels, which emits carbon dioxide gas into the atmosphere, is the largest known contributor.
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how the process of treating a substance with heat to destroy or slow the growth of pathogens?
Answers
The process of treating a substance with heat to destroy or slow the growth of pathogens is called thermal processing. It involves subjecting the substance to high temperatures for a specified amount of time.
There are different types of thermal processing methods, including:
Pasteurization: This is a process that involves heating a substance, such as milk or juice, to a specific temperature for a set period of time to kill harmful bacteria, viruses, and other pathogens. Pasteurization is commonly used in the food and beverage industry to make products safer for consumption.Sterilization: This is a process that involves heating a substance to a very high temperature to kill all microorganisms, including bacteria, viruses, and spores. Sterilization is commonly used in medical settings to sterilize equipment and supplies.Blanching: This is a process that involves briefly immersing a substance in boiling water or steam to destroy enzymes that can cause spoilage or discoloration. Blanching is commonly used in the food industry to prepare vegetables and fruits for freezing.Canning: This is a process that involves heating food to a high temperature and then sealing it in airtight containers to prevent the growth of microorganisms. Canning is commonly used to preserve foods, such as fruits, vegetables, and meats.Overall, thermal processing is an important method for controlling the growth of harmful microorganisms in various substances, and it plays a crucial role in food safety and public health.
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1. Which of the following is an example of sensitization:
You blink each time your eye doctor gives you a puff of air in your eyes.
A dog was hit by his previous owner, and now the dog cowers each time his new owner reaches out to pet him.
You no longer feel your shirt touching your skin.
You're walking on the sidewalk and a bicyclist almost hits you, so you jump out of the way.
Answers
The example of sensitization from the given alternatives is that 'A dog was hit by his previous owner, and now the dog cowers each time his new owner reaches out to pet him.'
Sensitization refers to the process in which an organism becomes more sensitive to stimuli, both good and bad. It happens when the body's nervous system becomes oversensitized to a particular stimulus that it begins to respond even to weaker or non-threatening stimuli.
The example given in the first option refers to a simple reflex action that occurs in response to the puff of air that is blown into the eyes during the eye examination. The third option is about sensory adaptation, which occurs when sensory receptors are exposed to stimuli for an extended period, resulting in a reduction in sensitivity. The fourth option refers to the fight or flight response that occurs as a result of a threatening stimulus, in which an individual's body prepares to confront or flee from danger.
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which statement best summarizie the principle of fanul succession
Answers
Answer:
Fossils in older strata are more primitive than fossils in more recent strata.
Drag each cell structure to the appropriate bin. If a structure is found in both plant cells and animal cells, drag it to the "both" bin. chloroplast cellulose cell wall plant cell only mitochondrion endoplasmic reticulum central vacuole nucleus plasma membrane animal cell only Golgi apparatus both centriole cytoskeleton
Answers
cellulose cell wall, core vacuole, and chloroplast are uniquely found in plant cells.
only a mammalian cell, the centriole. Both - mitochondria, cytoskeleton, Golgi, endoplasmic reticulum, nucleus, and plasma membrane. Animal and plant cells share more similarities than differences. Nonetheless, the distinctive architecture of plant cells play significant roles. In the chloroplasts of plant cells, photosynthesis takes place. The central vacuole of the plant cell occupies the majority of the cell's volume and performs a number of tasks, such as storing and hydrolyzing organic molecules. Plant cells are shielded from harm and keep their shape thanks to their cellulose-based cell walls. The most prevalent organic substance in nature is cellulose.
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How might the existence of high-pressure bands at 30and the poles affect the types of biomes in the areas?
Answers
Answer and Explanation:
The air at the high pressure that is at the 30° band sinks and experiences a dry and warm condition that is in contrast to those found at the equator regions.
The winds and atmospheric conditions also affect the growth and development of the biomes.
Such as those found in desert regions have a low latitude that is around the tropics. As the rays of the sun travel at a shorter distance to reach the surface as compared to the poles.
Low pressure creates thin air rises and leads to cloud formation as compared to high-pressure air.
In this assignment, you will create a poster with an illustration that models stem cell division and differentiation. Your poster should include a title, an illustration, and brief descriptions of stem cells, stem
cell division and differentiation, and the role of specialized cells in complex organisms, such as humans.
You will also type one to two paragraphs summarizing the information from your poster.
Please do a poster !!! And help
Answers
The poster illustrating the models of stem cell division and differentiation is found in the attachment.
What are stem cell division and differentiation?Stem cell division produces daughter cells. These daughter cells either develop into fresh stem cells or into differentiated cells with a more specific purpose, like bone, blood, brain, or heart muscle cells.
Through stem cell differentiation, a cell can become more specialized by switching from growth to specialization. This entails a series of modifications to metabolic activity, signal receptivity, membrane potential, and cell morphology.
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what process causes water to move in and out of the central vacuole? explain
Answers
Answer:
In plant cells, osmotic pressure can cause changes in the size of the central vacuole, which shrinks or swells as water moves into or out of the cell.
Explanation:
Hope this helped, Have a Great Day/Night!!
Answer:
Function of the Central Vacuole
Turgor pressure changes in a cell due to osmosis, which is the diffusion of water into or out of the cell. When a plant cell is in a hypotonic solution, there is a higher concentration of water molecules outside the cell than inside, and water will flow into the cell.
Explanation:
hope the answer was helpful
Do the gradient levels and the sediment load increase or decrease as the
river ages?
Answers
As a river ages, the gradient levels typically decrease, while the sediment load may either increase or decrease depending on various factors.
The gradient of a river refers to the slope or steepness of its channel. Over time, as a river flows and erodes its surroundings, it tends to reach a state of equilibrium, where the slope becomes less steep. This is known as a decrease in gradient levels.
The sediment load of a river refers to the amount of sediment (such as sand, silt, and rocks) carried by the flowing water. It can vary based on factors such as the geology of the area, the climate, and the amount of erosion occurring in the river's watershed.
In some cases, as a river ages and continues to erode its surroundings, the sediment load may increase as more sediment is picked up and transported downstream. However, in other cases, the sediment load may decrease if the river reaches a point of balance where erosion and sedimentation are relatively equal.
Therefore, the change in sediment load as a river ages can vary depending on local conditions and the specific characteristics of the river.
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explain how newton’s 1st law impacts the motion of a rocket
Answers
Answer:
The momentum change of the gases gives the rocket the "push" to go forward.
We call this push, the thrust of the rocket, i.e. the force exerted on the rocket.
Answer:
Like all objects, rockets are governed by Newton's Law of Motion. The first law describes how an object acts when no force is acting upon it. So, rockets stay until a force is applied to move them Likewise, once they're in motion there is no stopping them.
Explanation:
Rewrite your own words.
What factor determines when an animal species will enter an ecosystem insuccession?A. Food availabilityB. PioneersC. CompetitionD. Minerals
Answers
Ecology: Ecological succession
Ecological succession is the process of change in the species present in an ecosystem over time.
There are two types of succession:
• Primary succession,, where an area that hasn't had any life before begins to be colonized, such as a new island.
,• Secondary succession,, where there is a disturbance, such as a fire, that removes the organisms living in that area.
The changes in plants depend on changes in the soil and interactions with other organisms, such as competition for light with other plants and feeding from herbivores.
On the other hand, the changes in animals depend on sources of food and predation interactions.
This means the correct answer would be A. Food availability.
Many human diseases are genetically transmitted. Genes occur in pairs and each member of the pair can be of type A or a. The possible pairs are AA, Aa and aa, called genotypes. (Aa and aA are equivalent.) A child inherits one gene from its father and one from its mother. Assume that the gene transmitted to a child from each parent is chosen at random and with probability 0.5. In the example below, the father has the genotype Aa, and transmits A to the child. The mother has genotype aa and transmits a to the child. The child resulting genotype is Aa.
Father Mother
AA aa
child
Aa
a) Suppose the parents have genotypes Aa and aa as above. Explain why their offspring genotypes has the following distribution.
genotype probability
Aa 0.5
aa 0.5
b) The genetic disease is transmitted according to the autosomal recessive pattern: • The genotype aa is diseased and the child will die before it reproduces. • The genotype Aa is a carrier but is not diseased. • The genotype AA is not a carrier and is not diseased. i) [3 marks] If two carriers have a child, explain why their offspring genotypes has the following distribution.
genotype probability
AA 0.25
aa 0.25
Aa 0.5
b) ii) [3 marks] If the child of two carriers is not diseased, show that the probability that the child is a carrier is 2/3 .
Answers
By taking into account the potential gene combinations from the parents, this distribution is created. Each A and A gene has a 0.5 chance of being passed down from the father. One gene can only be passed from the mother.
The kid either inherits an A gene from the father and an a gene from the mother (resulting in the genotype Aa) or the child obtains an a gene from both parents (resulting in the genotype aa). These two possibilities are therefore equally likely.
a) Genotype Probability
Aa 0.5
aa 0.5
This is because there are two possible combinations when one gene is chosen randomly from each parent: Aa and aa. Each combination has an equal probability of 0.5.
b) 1) Genotype Probability
AA 0.25
aa 0.25
Aa 0.5
This distribution arises from the possible combinations when one gene is chosen randomly from each parent: AA, aa, and Aa. Each combination has an equal probability of 0.25.
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A defective ribosome would have the MOST detrimental effect on what processes would a defective ribosome have the most detrimental effect?
Answers
A ribosome is an essential organelle that plays a crucial role in protein synthesis. It is responsible for decoding mRNA and translating it into a specific sequence of amino acids that make up a protein.
A defective ribosome would have a profound impact on the protein synthesis process and the overall functioning of the cell. The most detrimental effect of a defective ribosome would be on the growth and development of the cell. Without properly functioning ribosomes, the cell would not be able to produce the proteins required for essential cellular processes. This would lead to stunted growth and reduced viability of the cell. Moreover, defective ribosomes would lead to the accumulation of misfolded or truncated proteins, which can cause cellular stress and damage. The misfolded proteins can disrupt normal cellular processes and lead to the formation of aggregates that can be toxic to the cell. In addition to affecting the growth and development of the cell, defective ribosomes can also lead to the development of various diseases. For instance, ribosomal mutations are associated with various genetic disorders, including Diamond-Blackfan anemia and Shwachman-Diamond syndrome. These conditions are characterized by reduced production of red blood cells and abnormalities in bone development, respectively. In conclusion, a defective ribosome can have a severe impact on the protein synthesis process, growth, and development of the cell, and can lead to the development of various diseases. Therefore, it is essential to maintain proper ribosomal function to ensure the overall health and wellbeing of the cell.For more such question on ribosome
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Which of the following cell types is likely to have the highest rate of material change
Answers
Answer:
a flat epithelial cell with a diameter of 5 micron
Explanation:
Answer: A. a flat epithelial cell with a diameter of 5 micron
Explanation: hope this help's
What is the gravitational constant on earth?
______________ m/s²
Answers
Answer:
9.807 m/s²
Explanation:
Hope this helps!
Answer:
9.807 m/s²
Explanation:
Describe the structure and parts of DNA molecule
Answers
Answer:
The DNA molecule consists of two strands that wind around one another to form a shape known as a double helix. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups. Attached to each sugar is one of four bases--adenine (A), cytosine (C), guanine (G), and thymine (T).
Explanation:
hopefully it's helpList and describe the 4 characteristics of life.
Answers
The four characteristics of living things (life) include the following:
Living things are made up of cells.Living Things reproduce.Living Things are based on genetic code. Living things grow and develop.What are the characteristics of life?The characteristics of life are those features that are exhibited by living organisms without which they may not be able to survive in their immediate environment.
Some of the characteristics of life include the following:
Living things are made up of cells: The cell is known as the functional structural unit of life without which life is not in existence.Living Things reproduce: Living things are known to be able to produce their young ones alive. The process of reproduction prevents them from going into extinction.Living Things are based on genetic code: All living things are made up of genetic materials which are in turn transferred during reproduction to their offspring.Living things grow and develop: The cells of living things do differentiate to have specific functions and multiply into matured cells capable of reproduction.Learn more about genetic material here:
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How do we get the energy out of the food that we consume?
Answers
Explanation: This energy comes from the food we eat. Our bodies digest the food we eat by mixing it with fluids (acids and enzymes) in the stomach. When the stomach digests food, the carbohydrate (sugars and starches) in the food breaks down into another type of sugar, called glucose.
ANSWER:This energy comes from the food we eat. Our bodies digest the food we eat by mixing it with fluids (acids and enzymes) in the stomach. When the stomach digests food, the carbohydrate (sugars and starches) in the food breaks down into another type of sugar, called glucose
Explanation:
I need your guys's help!
I had a science exam a day or two ago, and this was one of the questions:
Identify and name the cell organelle:
M- It allows transportation of materials in and out of plant cell.
Isn't the correct answer supposed to be cell membrane? Even though they mentioned in a plant cell.. Because the cell wall is completely permeable.. so it lets anything pass through.. but the cell membrane decides and allows materials to enter and exit the cell..
The teacher said the correct answer is cell wall though.. I would like to know your thoughts!
Answers
I believe that the correct answer would be cell wall. You said that the question referred to the cell organelle within a plant cell, which is why the cell wall is correct. The cell membrane is found in animal cells while the cell wall is found in plant cells.