Human skin cells, blood cells, and immune cells all contain the same number of chromosomes and the same sequence of genes. What allows them to each
perform such different specialized functions?
1.Random mutations occur as cells grow and divide which changes their function
2.The ability to erase certain sections of their genes
3.The ability to rewrite their DNA sequence as they grow and change
4.The ability to regulate gene expression within each different type of cell
Answers
Answer:
The correct answer is option 4, The ability to regulate gene expression within each different type of cell
Explanation:
Although many types of cells have the same DNA codes, the gene expression of each type differs, allowing for them to appear different from one another.
Related Questions
How could early life have changed the Earth?
Answers
How did the use of an oxygen isotope help elucidate the chemistry of photosynthesis?
Answers
The oxygen created during photosynthesis comes from water, not carbon dioxide.
By 1940, chemists began employing heavy isotopes to track photosynthetic processes. Early investigations employed water labeled with an oxygen isotope (18O). Plants that photosynthesized in the presence of H218O-containing water generated 18O-containing oxygen gas; plants that photosynthesized in normal water produced normal oxygen gas. These findings confirmed van Niel's notion that the oxygen gas created during photosynthesis is obtained from water.
Van Niel's proposal (that oxygen produced during photosynthesis originates in water rather than carbon dioxide) was significant because the popular (though invalid) theory was that oxygen was removed from carbon dioxide (rather than hydrogen from water, releasing oxygen) and carbon was then combined with water to form carbohydrate (rather than the hydrogen from water combining with CO2 to form CH2O).
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Identify the fleshy fruit type based on the
definition.
- contains a single seed, often a stony pit
flesh comes from enlarged receptacle that
grows around the ovary, endocarp is papery
- develops from a compound ovary (several
pistils fused together), usually contains more
than one seed
Answers
Answer:
drupes
Explanation:
drupes are a fleshy fruit type, containing a single pit.
What is density of the tissue?
Answers
Density of tissue refers to the mass of a tissue per unit volume.
It is a physical property that can be used to differentiate between different types of tissues, such as bone, muscle, and fat. The density of a tissue is affected by various factors, including the amount of water, fat, and mineral content. For example, bone tissue has a higher density than muscle tissue due to its higher mineral content.
Measuring the density of a tissue can be useful in medical imaging techniques such as X-rays and computed tomography (CT) scans. In these techniques, tissues with higher density, such as bone, appear white, while tissues with lower density, such as muscle and fat, appear darker. This allows medical professionals to identify abnormalities or diseases that may be affecting the tissues.
Additionally, the density of tissue can be affected by age, and lifestyle factors. For example, bone density tends to decrease with age, leading to an increased risk of fractures and osteoporosis. Regular exercise and a healthy diet can help to maintain or improve bone density.
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which list correctly matches the functions to the types of carbohydrates
Answers
Answer:
This question is incomplete; it lacks options and they are:
A) Energy: glycogen and starch
Structure: cellulose and chitin
B) Energy: cellulose and chitin
Structure: glycogen and starch
C) Energy: chitin and glycogen
Structure: cellulose and starch
D) Energy: cellulose and starch
Structure: chitin and glycogen
The answer is option A
Explanation:
Carbohydrates are biological molecules in living systems. Polysaccharides are a type of carbohydrate molecules, which are polymers made up of monomers called monosaccharides. Monosaccharides such as glucose, fructose etc. are joined together by glycosidic bonds to form this polysaccharides. However, polysaccharides found in nature are classified based on their function in their found organisms.
1) Energy: Glycogen and starch are the two carbohydrate polymers that function in this aspect. They are both made up of long chains of glucose unit linked by α glycosidic bonds. Glycogen stores energy in the animal cells while starch stores energy in plant cells.
2) Structure: Cellulose and Chitin are the two carbohydrate polymers involved in this function. Cellulose is made up of glucose monomer linked together by β glycosidic bonds. It is the major structural component found in the cell wall of plant cells. Chitin is also a polymer of N-acetyl glucosamine and the major structural component of the cell wall of oorganisms like fungi.
A student compared diploid chromosome numbers of several species with their genome size. Which of the conclusions about the chromosome number and genome size is true?
#1
The size of the genome cannot be deduced from the number of chromosomes.
#2
The more chromosomes, the smaller the genome size.
#3
The bigger the genome size, the more chromosomes.
#4
The size of the genome is proportional to the number of chromosomes.
Answers
Answer:
The size of the genome cannot be deduced from the number of chromosomes.
Green algae are protists that contain ____________ , organelles which contain chlorophyll a and function in ____________ .
Answers
The __________ sends sound vibrations to the inner ear. a. malleus b. stapes c. incus d. tympanum please select the best answer from the choices provided a b c d
Answers
Answer: malleus
Explanation:
Many bacteria and fungi are important in the environment because they?
Answers
Answer:
Bacteria and fungi is important in the environment because they return energy to the environment. By returning energy to the environment, they make the energy available for plants to utilize. They also recycle nutrients that other organisms will then use.
Explanation:
Winona Toy Company received an order for 45 bears. Stella will have to make these bears on her own. Write and solve an inequality to find how long it may take her to complete the order.
Answers
Inequality problems involve finding a value that is greater than or less than a given value.
Write and solve an inequality to find how long it may take her to complete the order?Let x be the time it will take Stella to complete the order in hours.
x > 45/1
x > 45 hours
Let x represent the number of hours Stella will take to complete the order.To find the number of hours, we need to set up an inequality. To do this, we can use the following equation:45 bears / x hours = 1 bear/hour
Solving for x, we get: x ≥ 45
This means that it will take Stella at least 45 hours to complete the order. To further solve this inequality, we can assume that Stella can make 1 bear in 1 hour. This means that it will take her 45 hours to make all 45 bears.However, this is only an estimate, as it does not take into account any breaks or delays. Therefore, it is likely that it will take Stella longer than 45 hours to complete the order. To account for potential delays, we can add a buffer to the inequality. For example, if we assume that it will take Stella an extra 5 hours to complete the order due to delays, then the inequality would be: x ≥ 50.This means that it will take Stella at least 50 hours to complete the order. In conclusion, the inequality we can use to estimate how long it may take Stella to complete the order is x ≥ 45, where x is the number of hours it will take Stella to complete the order.To learn more about Inequality problems refer to:
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Parenchyma is a simple permanent tissue and xylem is a complex
permanent tissue.
Answers
Answer:
Explanation:
This is parenchyma is found below the epidermis of plants and It of living cells that have thin cell walls which are loosely packed to accommodate the intracellular space. Parenchyma consist of chlorophyll and they take part in photosynthesis.
Xylem is called a permanent tissue because it contain various types of cells like tracheids, vessels, xylem fibres, xylem parenchyma which is responsible for storing food.
In the Arizona desert, a fossilised specimen of this native trees was discovered. This species is no longer alive. Explain the current environment and how it differs from the one the tree lived in.
I Need Yalls Help <3
Please Help Me Out
Answers
The Arizona desert is a hot and arid region, characterized by low annual rainfall, high temperatures, and sparse vegetation. It is home to a variety of plant and animal species that are specially adapted to survive in these harsh conditions. The desert is also known for its geological formations, including canyons, mesas, and sand dunes.
Over the course of geological time, the climate and environment of the Arizona desert have changed significantly. For example, during the Pleistocene epoch (2.6 million to 11,700 years ago), the region was much cooler and wetter than it is today. This allowed for the growth of vegetation that is not present in the modern desert, including grasslands, savannas, and even forests in some areas.
It is possible that the fossilized tree specimen discovered in the Arizona desert lived during a period when the climate and environment were different from what they are today. By studying the tree's morphology and anatomy, scientists may be able to infer information about the environmental conditions that existed when the tree was alive. For example, the presence of growth rings or other indicators of growth rate can provide clues about the amount of rainfall and temperature fluctuations that the tree experienced during its lifetime. By comparing this information to current climate data, scientists can gain insights into how the environment of the region has changed over time.
Hope this helps, have a good day.
Another name for a convex lens is a converging lens. Converging means…
A. Brings light into focus (beams come together)
B. Spreads light our or focus (beams spread apart)
Answers
Answer:
A
Explanation:
Answer:
A. Brings light into focus (beams come together)
Explanation:
Converging lens or convex lens is a type of lens on which parallel rays of light after refraction converge or meet at the focus of the lens.
Hope it helps.
If you have any query, feel free to ask.
Which situation would increase the fluidity of a
phospholipid bilayer?
A. decreasing the temperature
B. increasing the number of proteins
C. increasing the number of cholesterol molecules
D. increasing the number of unsaturated fatty acids
Answers
Answer:
C
Explanation:
Cholesterol molecules stay in between fatty acid tails preventing them from sticking together
The situation that would increase the fluidity of the phospholipid bilayer is increasing the number of cholesterol molecules. The correct option is C.
What is a phospholipid bilayer?A phospholipid bilayer is a layer around a cell. The cell membrane is composed of a bilayer of phospholipids. It contains fatty acids and alcohol.
Bilayers of phospholipids are essential parts of cell membranes. The lipid bilayer serves as a physical barrier to the entry and exit of molecules and ions from the cell. However, allowing the selective transit of specific substances into and out of cells is a crucial role of the cell membrane.
Cholesterol is present between fatty acid molecules and prevents them from sticking to each other.
Therefore, the correct option is C. increasing the number of cholesterol molecules.
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1. Within food chains, matter is
a) constantly increasing
b) constandy decreasing
c) always changing from one element to another
d) alavays recycled from one chemical form into
another
Answers
Answer:
C
Explanation:
When an organism eats anothee organism matter transfers
Parasitism is a symbiotic relationship where
A) both organisms benefit
B) one organism benefits while the other has no benefit nor is it harmed
C) one organism benefits while harming the other
Answers
Answer: The correct answer is C) one organism benefits while harming the other
Explanation:
Parasitism is a symbiotic relationship where one organism lives all or part of its life in (or on) a living host organism, in a relationship that benefits the parasite while harming the host in some way.
How much do the Tanakas spend on health insurance premiums each year
Answers
Answer:
6,000
Explanation:
Replace the underlined words with the correct vocabulary term from the Study Guide page.
The number added to a population by movement can considerably increase a population's size.
Answers
immigration (the number added to a population by movement) can considerably increases a population's size
Immigration is the worldwide movement of individuals to a country of destination where they are not natives or citizens in order to establish themselves as long-term residents or naturalized citizens. [1][2] [3] Short-term visitors, commuters, and other travelers do not fit within the concept of immigration or migration; however, seasonal labor immigration is occasionally included.
Immigration is the process through which people move to another nation to live permanently. Immigration has historically provided governments with significant social, economic, and cultural benefits. The history of immigration is lengthy and diverse, and it has frequently led to the emergence of multicultural communities. Many modern governments are distinguished by a wide range of cultures and ethnicities that have come about as a result of earlier waves of immigration.
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Which consumers are carnivores (eat meat)?
Answers
Answer:
carnivores (eat meat)
Explanation:
If methylene blue dye is added to a suspension of yeast cells, any living cells
remain colourless. However, any dead cells are stained blue. This fact was
used to carry out an investigation into the rate at which yeast cells were killed
at two different temperatures (at high temperatures the yeast enzymes will be
denatured)
Answers
The correct option is that the higher the temperature of Y the more colorless cells it contains and is denoted as option B.
What is Temperature?This us defined as the degree of hotness or coldness of a body and is dependent on thermal energy.
High temperature will denature yeast as a result of its rich protein content and increasing the temperature will therefore leads to the presence of more colorless cells in Y which are able to act on it.
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True/false: bacterial cultures are easily identified from their microscopic appearance.
Answers
False. Bacterial cultures are not easily identified solely from their microscopic appearance. Although the microscopic examination can provide some information about the shape, arrangement, and basic characteristics of bacteria, it is not sufficient to accurately identify a specific bacterial species.
Bacteria come in various shapes such as cocci (spherical), bacilli (rod-shaped), and spirilla (spiral-shaped), but these morphological features are not unique to individual species. Additionally, some bacterial species can have similar arrangements and staining patterns when observed under the microscope, making it difficult to distinguish them solely based on these factors.
To accurately identify bacterial cultures, other methods such as biochemical tests, genetic sequencing, and antigen detection are employed. These techniques provide more specific information about the bacteria's metabolic processes, genetic makeup, and surface proteins, enabling precise identification of the species.
In summary, while microscopic appearance can give some preliminary information about a bacterial culture, it is not enough for easy and accurate identification. Additional tests and techniques are required for a precise determination of the bacterial species.
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What is chromosomes?Write in brief about the structure of a chromosome.must include all points with explanations
Answers
Answer:
Please find the detailed explanation below
Explanation:
A chromosome is thread-like material that carries the long strands of the genetic material (DNA), which in turn carries the gene. The chromosome is the found form of nuclear material in the nucleus.
Due to the long nature of the DNA molecule, they cannot fit into the cell. Hence, to ensure they fit, the cell wraps the DNA molecule around a set of protein called HISTONE proteins to form a NUCLEOSOME. Each nucleosome is made up of DNA coiled around a set of 8 proteins called HISTONE OCTAMER. The nucleosome structure becomes more compacted and further wound around the histone to form a CHROMATIN. This chromatin then undergoes condensation to form the visible CHROMOSOME structure.
De todos los elementos del cuarto periodo (K hasta Kr) indica:
a) ¿Cuál tiene mayor electronegatividad?
b) ¿Cuál tiene el menor radio atómico?
c) ¿Cuál es el metal más activo?
d) ¿Cuál tiene la mayor energía de ionización?
e) ¿Cuál es el elemento de mayor afinidad electrónica?
Answers
Answer:
El elemento con alta electronegatividad es
Explanation:
El elemento con alta electronegatividad es
De los elementos del grupo principal, el flúor tiene la electronegatividad más alta (EN = 4.0) y el cesio la más baja (EN = 0.79). Esto indica que el flúor tiene una alta tendencia a ganar electrones de otros elementos con electronegatividades más bajas. Podemos usar estos valores para predecir qué sucede cuando ciertos elementos se combinan.
Which best determines the health of a lake used as a source of freshwater?
A. its depth and width
B. its temperature and pH
C.its location and depth
D.its temperature and depth
Answers
Answer:
B
Explanation:
A measure of the natural populations of algae, plants, fish, and other wildlife provides evidence of the health of a body of water.
Which statement best describes the distribution of
resources around the earth?
Please help me :(
Answers
Answer:
Resource distribution refers to the geographic occurrence of resources on earth. In other words, where resources are located. Any particular place may be rich in the resources people desire and poor in others. As a result, resources are distributed unevenly across the globe.
Explanation:
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2. Which statement reflects a way in which asexual reproduction is beneficial?
A. It results in genetic variation.
Matching
B. It requires a lot of time and energy.
C. Organisms can reproduce without a mate.
Answers
Answer: it will be answer c
Explanation: because it says organisms not human. There are a lot of them could reproduce without mate
One key piece of evidence as to the timing of the most lethal event is:
a. The DNA is the same for all the victims
b. People's pets were found with them
c. Collapse of the walls from the big earthquake
d. Lahar deposits that cover the site
e. most bodies are found in a single surge layer
Answers
Most bodies are found in a single surge layer. Therefore, option (E) is correct.
The majority of the bodies were found in a single surge layer, which is the main indicator of the timing of the most fatal incident. This implies that a catastrophic occurrence, like a natural disaster or a mass casualty event, took place at a certain period and caused the remains to be deposited in a concentrated layer.
This data suggests that a single incident, as opposed to several events spread out across time, was responsible for the high fatality rate. The presence of a distinct surge layer can offer important clues about the kind and timing of the incident that caused the fatalities.
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True or False: Decomposers do NOT need energy to live.
A. True
B. False
Answers
Answer:
False
Explanation:
Consumers (animals) get their energy by eating the producers and/or other consumers. Scavengers and decomposers get their energy by eating dead plants or animals. Living organisms require these nutrients to create cells, tissues and to provide energy for life processes. Thus, all living things need energy to survive.
6. Charles Darwin is given credit for being the true father of the Theory of Natural Selection. Alfred
Wallace is also sometimes given partial credit for coming to the same conclusion without ever talking
with Charles Darwin. Which of the following statements is NOT part of the Darwin-Wallace Theory
of Natural Selection?
Answers
There is no statement that is NOT part of the Darwin-Wallace theory of natural selection.
What is Darwin-Wallace theory of natural selection?The Darwin-Wallace theory of natural selection includes the following four statements:
Individuals within a population exhibit variation in traits.Some trait variations are heritable, meaning they can be passed down from one generation to the next.More offspring are produced than can survive, leading to a struggle for existence.Individuals with advantageous traits are more likely to survive and reproduce, passing on those traits to their offspring.Therefore, the answer to your question is that there is no statement that is NOT part of the Darwin-Wallace theory of natural selection.
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Which statement correctly describes the relationship between technology
and science?
A. New developments in technology make scientific research
irrelevant.
B. Science benefits society as a whole, while technology benefits
engineers only.
OC. Science is used to develop new technology, but technology is not
used in science.
OD. Science and technology influence each other and lead to new
discoveries.
Answers
Answe:
The Correct answer is D
Science and technology influences each other and leads to new discoveries