The tobacco mosaic virus is known to be helical in nature.
Tobacco Mosaic VirusThe tobacco mosaic virus is said to be helical in nature because its capsids are rod-shaped or filamentous in appearance.
The filamentous or rod-shaped capsids have a central cavity that holds the genome (usually in the form of ribonucleic acids) of the virus.
Helical viruses are different from other viruses that may be icosahedral, prolate, or complex as far as their own capsids are concerned.
The tobacco mosaic virus, therefore, typicalizes the helical viruses.
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Deforestation is a process in which trees and other vegetation are removed from a section of land. What statement best describes the long-term consequences of deforestation on the carbon cycle?
A.
More carbon will be released by carbon sources, so the level of atmospheric carbon may decrease.
B.
Less carbon will be stored in carbon sinks, so the level of atmospheric carbon may increase.
C.
Less carbon will be released by carbon sources, so the level of atmospheric carbon may increase.
D.
More carbon will be stored in carbon sinks, so the level of atmospheric carbon may decrease.
Is a swan a type of duck?
"The answer is no, a swan is not a type of duck.
Swans and ducks are both members of the Anatidae family, which also includes geese. However, they belong to different genera within this family. Swans are typically placed in the genus Cygnus, while ducks are placed in the genus Anas, among others. Swans are generally larger than ducks and have distinct physical characteristics, such as a longer neck and a different shape of the bill. Additionally, swans and ducks exhibit different behaviors and have different habitats and diets. Therefore, while they are related, a swan is not classified as a type of duck."
2)Through the action of osteoclasts,
Answer:
Osteoclasts are the type of cells which are responsible for the absorption of calcium from bones.
Explanation:
Osteoclasts is special type of cells which is released by parathyroid gland when the blood have low levels of calcium. Osteoclasts absorb calcium from the bones and add this calcium into the blood to increase the calcium level. If calcium is present in very high amount so this calcium is stored in the bones of the body and extracted when needed by the body.
What is an important requirement for a manned spacecraft traveling through space?
Answer: The presence of breathable oxygen in addition to a sustainable state of pressure.
Explanation:
Final answer:
Manned spacecraft require sophisticated life support, radiation protection, autonomous navigation, communication systems, sustainable power sources, and sufficient fuel capacity to safely travel through space and manage the challenges of the environment and distance from Earth.
Explanation:
An important requirement for a manned spacecraft traveling through space is the ability to provide life support systems that maintain a stable environment suitable for human life. This includes regulating the spacecraft’s internal temperature, ensuring the crew receive adequate oxygen, and managing waste and water. Additionally, radiation protection is crucial, as astronauts are exposed to elevated levels of cosmic and solar radiation. Spacecraft must also be equipped with autonomous navigation systems and communication systems that can operate despite the significant time delay in signals to and from Earth, especially when traveling to distant planets like Mars or the outer solar system. Adequate power sources, such as solar arrays or nuclear batteries to provide energy for the duration of the mission, are also essential. Lastly, the spacecraft must contain enough fuel to not only escape Earth’s gravity but also to allow for mid-course corrections, orbit insertion, and a potential return journey to Earth.
Use the image to answer the questions.
is a producer.
is a consumer.
Answer:
B is a producer
C is a consumer
If the grass contains 100,000 kcal of energy, how much energy will the zebra receive?
10,000 kcal
Explanation:
which factor is most likely to play a role in producing different varieties of cattle? A.necrosis
B.meiosis
C.apoptosis
D.mitosis
Answer:
I think it is Meiosis
Explanation:
In meiosis, 4 or more combinations of the genes are created. This can be graphed using a punnet square.
Final answer:
The most likely factor to produce different varieties of cattle is meiosis, which allows for genetic recombination and diversity through selective breeding. Necrosis and apoptosis, which pertain to cell death, do not contribute to genetic diversity, while mitosis results in identical cells.
Explanation:
The factor most likely to play a role in producing different varieties of cattle is meiosis. Meiosis is the process of cell division in sexually reproducing organisms that results in the production of gametes (sperm and egg cells) with half the number of chromosomes of the parent cell. This reduction leads to genetic diversity when these gametes combine during fertilization. Meiosis allows for genetic recombination and the potential for new traits to emerge, which can be selected for through breeding practices. Therefore, selective breeding, utilizing the genetic diversity produced by meiosis, is instrumental in cultivating different cattle varieties.
On the other hand, necrosis and apoptosis are processes related to cell death. Necrosis is an uncontrolled process often due to injury, while apoptosis is a programmed cell death necessary for development and maintaining cell equilibrium. Mitosis is a process of cellular replication that produces two genetically identical daughter cells and does not contribute to genetic diversity as meiosis does.
Each statement explains a cause that would prevent a plant not to bear seed in its life cycle except:
Answer:
"The plant will grow to full maturity and produce flowers instead"
Why blood from the small intestines goes to the liver before it goes to other organs
Answer:
Blood goes from small intestine to the liver in order to remove toxic substances and store the nutrients. After that, the blood is sent to all parts of the body.
Explanation:
Liver is an important organ of the body which is responsible for the purification of blood coming from the small intestine and then it send to all organs of the body. This blood contains nutrients which is absorbed in the small intestines and some toxic substances which is purify by liver.
. In which phylum do organs and organ systems first appear?
a. Annelida
b. Hemichordata
c. Nematoda
d. Platyhelminthes
Answer:
The answer is d. Platyhelminthes
Why is surface tension important
Answer:
Surface tension determines the efficiency of detergent formulation. The high surface tension of water makes it a relatively poor cleaning detergent. By increasing the temperature of water, the cleaning efficiency increases slightly as surface tension decreases.
Explanation:
When looking into a shop window on a bright sunny day you see an image that is a mixture of your image and the items on display. The principles of light involved are
reflection and absorption
refraction and absorption
refraction and transmission
reflection and transmission
Answer:
D
Explanation:
because it is reflecting off the window and traveling through.
Answer:
D
Explanation:
light reflects or bounces off the window because the material of the window (in this case glass) reflects the light back to the sun and glass makes white light .White light can't be absorbed , but can be reflected. And the sun shines light through the window which is called transmission because its going in a direction(through the window).
Using the genotypes and phenotypes provided from the iguana gene pool, which statement is NOT correct?
A.Webbed feet is the recessive trait
B.WW x ww produces offspring with no webbing.
C.2 iguanas with no webbing could have an offspring with webbing,
D.Crossing an iguana with webbed feet with one with no webbing would
produce iguanas ALL with no webbing because this is the dominant trait.
Answer:
Crossing an iguana with webbed feet with one with no webbing would produce iguanas ALL with no webbing because this is the dominant trait.
Explanation:
If an iguana heterozygous for no webbing (Ww) is crossed with an iguana with webbed feet (ww), they have a 50% chance of having an offspring with the recessive trait, webbed feet.
A plant takes in carbon dioxide (CO2) from the atmosphere and uses it to make glucose (C6H12O6) through photosynthesis. Later a deer eats the leaves of the plant obtaining the plant’s glucose. After respiration, the deer exhales carbon dioxide (CO2) back into the atmosphere. This is an example of _________________.
Final answer:
The process described is the carbon cycle, which involves the movement of carbon between different parts of the ecosystem through the processes of photosynthesis and respiration.
Explanation:
A plant takes in carbon dioxide ([tex]CO_{2}[/tex]) from the atmosphere and uses it to make glucose ([tex]C_{6}H_{12}O_{6}[/tex]) through photosynthesis. Later a deer eats the leaves of the plant obtaining the plant's glucose. After respiration, the deer exhales carbon dioxide ([tex]CO_{2}[/tex]) back into the atmosphere. This is an example of the carbon cycle.
The carbon cycle is a fundamental biogeochemical cycle, which involves the movement of carbon between the atmosphere, biosphere, oceans, and geosphere. During photosynthesis, plants use sunlight to convert atmospheric [tex]CO_{2}[/tex] and water into glucose ([tex]C_{6}H_{12}O_{6}[/tex]) and oxygen ([tex]O_{2}[/tex]). This glucose is then used by the plant for growth and energy. When a heterotroph, such as a deer, eats the plant, it obtains energy by breaking down the glucose during respiration. The respiration equation is: [tex]C_{6}H_{12}O_{6}[/tex] + 6 [tex]O_{2}[/tex] → 6 [tex]CO_{2}[/tex] + 6 [tex]H_{2}O[/tex] + Energy released.
In this process, as glucose is broken down, carbon is returned to the atmosphere in the form of [tex]CO_{2}[/tex], thus completing the cycle. This illustrates how carbon is continuously cycled within the ecosystem through the processes of photosynthesis and respiration.
Which of the following is a reason for discovering a new drug?
A. To confuse patients and physicians
B. To replace a less-affective drug
C. To Create a new disease
D. To duplicate an older drug
Answer:
B to replace less affective drug.
The reason for discovering a new drug is to replace a less-effective drug.
What is a drug?"It is a chemical substance, which, when administered to a living organism, produces a biological effect."Some of the drugs include: anti-depressant, CNS stimulants, analgesics, etc.Why some drugs become less-effective?As we use the drug for long time it creates a tolerance level, where our body fails to produce a response when administered by such drugs.Over the time, diseases undergo various types of mutation and cannot be treated by using the same drug that was used before. So, a new drugs are being discovered from time to time.Hence, the correct option is B. To replace a less-affective drug.
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Glaciers act as ___ in the water cycle, because they can store water for a long period of time
Glaciers act as reservoirs in the water cycle, storing water for a long period of time. They play a crucial role in regulating water supply, especially in regions that depend on glacier meltwaters. The retreat of glaciers due to global warming can have significant impacts on local ecosystems and water availability.
Explanation:Glaciers act as reservoirs in the water cycle because they can store water for a long period of time.
When water from precipitation or melting ice accumulates in glaciers, it gets stored as ice for hundreds or thousands of years. This stored water is released gradually over time, contributing to the overall water cycle. Glaciers play a crucial role in regulating water supply, especially during dry seasons or in regions that depend on glacier meltwaters.
An example of glaciers acting as reservoirs is the Grinnell Glacier in Glacier National Park. The retreat of the glacier due to global warming has led to a loss of summer meltwaters, affecting local ecosystems and water supplies.
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Which of the following is NOT a type of tissue found in plants?
O Dermal
O Non-living
O Vascular
O Ground
Plants have three main types of tissue - dermal, vascular, and ground. 'Non-living' is not considered a type of tissue in plants as plant tissues are primarily formed of living cells.
Explanation:Plants consist of three main types of tissues, namely: dermal, vascular, and ground tissue. Dermal tissue, which comprises the plant's outer protective coating, vascular tissue, responsible for transporting water, nutrients, and sugars between different parts of the plant, and ground tissue, which includes all tissues not part of the dermal or vascular systems and typically serves a metabolic function. However, 'Non-living' is NOT a type of tissue found in plants. In a physiological sense, it's typically the living cells that form the various plant tissues.
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The
cycle is not a nutrient cycle
Answer:water cycle
Explanation:
Biogeochemical cycles, such as the carbon, nitrogen, and phosphorus cycles, play a crucial role in ensuring the continuous availability of essential nutrients for all living organisms, including their recycling through the ecosystem and non-living world.
Explanation:Biogeochemical Cycles
Biogeochemical cycles refer to the processes responsible for the cycling of mineral nutrients through ecosystems and the non-living world. These cycles ensure that essential nutrients, which are vital for the growth and survival of all organisms, are reused and recycled within the environment. Among the significant nutrient cycles are the carbon cycle, nitrogen cycle, and phosphorus cycle. Every living organism relies on these cycles for nutrients that are crucial for their growth and development.
For instance, the carbon cycle involves plants taking in carbon dioxide during photosynthesis and releasing oxygen. The nitrogen and phosphorus cycles are critical in providing mineral nutrients to plants from the soil. These nutrients then flow through the ecosystem, supporting various forms of life, and are eventually returned to the soil and atmosphere where the cycle begins again.
Disruptions in nutrient cycles can lead to environmental issues such as nutrient leaching and a decline in soil fertility, impacting both plant and animal life. The condition of natural vegetation cover is essential in maintaining these cycles, as plants play a significant role in the absorption and release of nutrients.
What proportion of tropical storms turn into hurricanes?
Individuals with characteristics that are poorly suited to the environment are _______ likely to survive and reproduce. *
Answer:
less
Explanation:
not, less,
anything that means the same as that. bc if they're less suited. they die.
What does Darwin’s theory of evolution explain about the natural world
Answer:
1). All living organisms are constantly involved in 'a struggle for existence'.
2). In a population, those that tend to survive and reproduce are the individuals whose variations gives them competitive advantage over the rest.
Explanation:
Darwin, thus, identified environmental pressures as the main cause of natural selection. They cause favourable variations to accumulate and unfavourable ones to be weeded out. Over thousands of generations, favourable variations, naturally selected by he environment, accumulate sufficiently to give rise to new species from ancestral species. Therefore, according to Darwin, natural selection, acting through environmental pressure, is the driving force behind evolutionary change in the natural world.
Darwin's theory of evolution explains that all life has evolved from a common ancestor through a process called natural selection. Natural selection involves individuals with advantageous traits being more successful at survival and reproduction, leading to these traits being more prevalent in subsequent generations. This theory is a fundamental part of understanding biological diversity and species change over time.
Explanation:Darwin's theory of evolution explains that all life has evolved and diversified from a common ancestor, primarily through a process he called natural selection. This process involves certain individuals within a population possessing more favorable adaptive characteristics, allowing them to survive, reproduce, and pass these characteristics onto the next generation. Over time, through natural selection, organisms evolve in response to their changing environment, leading to both the unity and diversity of life.
The theory of evolution by natural selection describes a mechanism for species change over periods of time. This was a groundbreaking concept that challenged the then-dominant belief that species were static and unchanging, as it proposed that species adapt and change in response to environmental pressures over generations. This concept was advanced by both Charles Darwin and Alfred Russel Wallace, who independently observed similar patterns across species and ecosystems.
Natural selection, according to Darwin, was an inevitable outcome of three principles that operated in nature. Firstly, characteristics of organisms are inherited. Secondly, more offspring are produced than can survive due to limited resources, leading to competition within each generation. Thirdly, offspring vary in their inherited characteristics. Individuals with characteristic variations that best equip them to compete for resources will therefore have a survival advantage and reproduce more successfully, leading to these traits being more prevalent in subsequent generations.
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What do solid and hazardous wastes have in common?
Answer:
Hazardous and solid wastes can be solid, liquid and gaseous form.
Explanation:
Hazardous wastes are wastes that are composed of harmful or toxic substances which is generated from industries, households, hospital e.t.c that are threat to humans and their environment.
Solid wastes are discharged or absconded materials such as refuse, sludge, gabbage, from water treatments, air pollution, household, industries e.t.c.
After a long soccer practice, Jack felt his pulse increase. As he cooled down, his pulse began to slow. Since he'd been studying the circulatory
system in science class, he knew why his pulse slowed.
What is the main structure of the circulatory system that makes the blood move through the body?
O
A. artery
O
•
B. lymph vessels
C. heart
D. lungs
Answer:
heart
Explanation:
The heart is the main structure of the circulatory system that makes the blood move through the body, hence option C is correct.
What is the structure of the heart?A fist-sized organ, the heart circulates blood throughout your body. It serves as your circulatory system's main organ. Four major muscle-driven chambers make up your heart, they are each powered by electrical impulses.
Your nervous system and brain control how your heart beats. To obtain oxygen into the blood, the circulatory system (cardiovascular system) pumps blood from the heart to the lungs.
The remainder of the body receives oxygenated blood from the heart via arteries. Oxygen-depleted blood is returned to the heart by veins to restart circulation.
Therefore, the heart is the main structure of the circulatory system.
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How are rocks that contain oil
similar to a sponge?
Which DNA or RNA consists of a single copy of a gene
Which shows the correct sequence of steps involved in sexual reproduction?
Answer:
Meiosis produces sex cells, egg and sperm join. Then zygote forms, new organism develops. Egg and sperm join, zygote forms, meiosis produces sex cells, new organism develops.
Explanation:
Answer:
three stages: Pre-fertilization, Fertilization, and Post-fertilization
Explanation:
Which is a possible negative result of using renewable resources?
Answer:
Explanation:
h
This is the result of fertilization, in the early stages of growth and development
Answer:
Cell or zygote is the product of the fertilization process.
Explanation:
Zygote is formed by the fusion of sperm cells of male and egg cells of female in the process of fertilization. Zygote is diploid cell i. e. double number of chromosomes while male sperm cell and female egg cell are haploid i. e. half number of chromosome. Zygote contains half genes from father and half from mother cell.
Which molecules are products of photosynthesis
Answer:
glucose and oxygen is produced from photosynthesis
A red flower is crossed with a pink flower, how many offspring are:
Red?
White?
Pink?
Llamas have sexual reproduction. Some types of llamas have 74 chromosomes. That is how many chromosomes are in their somatic (body) cells. How many chromosomes would be found in their gametes?
Answer: 37 chromosomes.
Explanation: As is typical of mammals, llamas are diploid organisms, meaning that the number of chromosomes in each of their somatic cells is exactly twice of that found in the gametes (the so-called haploid number, referred to as "n"). If a particular species has 74 chromosomes in its somatic cells, we should expect to find 74/2=37 chromosomes in each gamete.
Sexual reproduction occurs as a result of the fertilization of the gametic counterparts of two different sexes (males and females).
Some types of llamas have 74 chromosomes (diploid). The number of chromosomes that would be found in their body cells would be 32 single chromosomes (haploid cells).
Organisms undergo growth division process of mitosis and meiosis.Mitosis occurs in the body cells producing the exact number of diploid cells from parent cell. Meiosis is a reductional division that reduces the number of chromosomes in the gamete cells by half.This is to ensure that the fertilization of the egg gamete (haploid) and the sperm cell (haploid) yields a diploid zygote.Learn more: https://brainly.com/question/17179690