What description best explains why viruses can become more pathogenic to hosts that were not affected by the virus before?

Sickle cell anaemia is inherited red blood disorder in which there is deficiency of red blood cells for transporting oxygen in the body. Whereas, haemophilia is an inherited genetic disorder in which the person's blood doesn't clot leading to excessive loss of blood.

Explanation:

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Answer:

The first anticodon leaves the ribosome through the E-site

Explanation:

Translation is the second stage of gene expression. It occurs in the ribosomes (organnelles of protein synthesis) where amino acid sequence is synthesized using a mRNA template. The tRNA (transfer RNA) is responsible for reading the mRNA codon using its ANTICODON, which is complementary to the mRNA codon.

The tRNA reads the mRNA codon and carries the amino acid that corresponds what it reads. tRNA has three binding sites on the ribosome; A-site, P-site and E-site. A tRNA molecule with the complementary anticodon binds to the codon on the P-site, and carries its corresponding amino acid. Another tRNA with complementary anticodon occupies the A-site, carrying the corresponding amino acid again.

Once both sites are occupied, the tRNA on the P-site transfers its amino acid to the one on the A-site to form a peptide bond. This causes the ribosome to shift the tRNA on the P-site, allowing the one on the A-site to be free. When this happens, the anticodon of the first tRNA on the P-site leaves the ribosome via the E-site in order to bind to another complementary mRNA codon and continue the translation process.

TABULAR GRAPH IT IS VERY EASY

Answer:

The population of sage-grouse decreases with the passage of time because of humans.

Explanation:

In the past, long time ago the population of sage-grouse bird were in millions in the Western United States of America and Canada but gradually decrease occurs in population with the passage of time due to the change which occurs in the environment by humans. Destroying the natural habitat for making buildings and for energy development decrease the population of sage-grouse from 16 million to 500,000 during 100 years.

The ranges of the Greater sage-grouse have changed over time due to the expansion of human civilizations.

The Greater sage-grouse is a large hen-like bird that resides in sagebrush-covered areas. The ranges that this wild bird inhabits have historically spanned all throughout the United States and parts of Canada, including:

and many other states.

The current range of the greater sage-grouse now only spans the Western United States and parts of Canada. This decrease in range is due to loss of habitat, interrupted migration patterns by the construction of roads, power lines, etc., and other human disturbances.

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Answer:

Well Like humans, mice naturally develop diseases that affect these systems, including cancer and diabetes. Immunodeficient mice (mice without a fully functioning immune system) can also be used as hosts to grow both normal and diseased human tissue. This has been a useful tool in cancer and AIDS research.

Also for expermients many of there tissues are like humans so they get a result the same that a human would get as well.

Explanation:

Hope this helps!

Answer:

D is the right one i think, biological Adaptation delete this answer if it is wrong

Explanation:

D- Biological adaptation best explains why two organisms evolved from a common ancestor now have different characteristics.

Biological adaptation refers to the process by which organisms develop traits or characteristics that improve their chances of survival and reproduction in a specific environment.

Over time, as different populations of organisms face different environmental pressures, they may evolve different adaptations that enable them to survive and reproduce more successfully in their respective environments.

This can lead to differences in the characteristics of different populations of organisms that share a common ancestor.

Extinction, metabolism, and sexual reproduction are not processes that directly explain why two organisms evolved different characteristics.

Extinction refers to the process by which species die out, metabolism refers to the chemical processes that occur within living organisms to maintain life, and sexual reproduction involves the exchange of genetic material between individuals, but none of these processes directly explain why two organisms evolved different characteristics from a common ancestor.

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Answer:

Climate change has caused ocean levels to rise higher.

Answer:

x = [tex]\frac{1}{10}[/tex]

Explanation:

In an equation our aim is to find the value of the whatever we are finding but in this case it is 'x' as well as keeping the equation balanced. If we did one operation on only one side then the equation has changed so it's important to remember that is you do an operation one side you must do it on the other otherwise the whole equation will change

[tex]\frac{6x-3}{2x+7} = \frac{3x-2}{x+5}[/tex]

→ First step is to cross multiply the denominators to get rid of the denominators so ( 6x - 3 ) ×  ( x + 5 ) and ( 3x - 2 ) × ( 2x + 7 )

( 6x - 3 ) ( x + 5 ) = ( 3x - 2 ) ( 2x + 7 )

→ Expand out the brackets using FOIL, first two, outer two, inner two and last two

6x² + 30x - 3x - 15 = 6x² + 21x - 4x - 14

→ Simplify and collect the 'x' terms together

6x² + 27x - 15 = 6x² + 17x - 14

→ Minus 6x² from both sides to isolate the whole numbers as well as the 'x' values

27x - 15 = 17x - 14

→ Minus 17x from both sides to collect the 'x' terms

10x - 15 = -14

→ Add - 15 to both sides to isolate 10

10x = 1

→ Divide both sides by 10 to isolate x

x = [tex]\frac{1}{10}[/tex]

Answer:

True   ,When you add  a polutant like manure then add water to it the  water will run down to the closest body of water causing the water to be polluted

Answer:

A) All three have similar biotic and abiotic features.

Explanation:

The similarities which exist between the temperate rainforest, temperate seasonal forest, and woodland biomes are the presence of biotic and abiotic factors. Biotic feature is the living part of the environment while abiotic factors are the non living part of environment. There are variation present among these forest about temperature and precipitation due to their presence on the different parts of the world.

Answer:

C. Cytokinesis

Explanation:

I study

Cytokinesis is the final phase in the cell cycle after which a cell divides into two daughter cells, hence option c is correct.

Cytokinesis is the final process in the cell cycle, where a cell is ready to divide before it is all the phase of the cell cycle ensuring that the cell has all the components in double amounts.

Before cell division cells spent most of their time in interphase, where the cell synthesis organelle, and protein and doubles its DNA. All the necessary components protein, enzymes, and growth factors for division during this phase.

Cytokinesis is the final step where the cell divide in equal parts if all the steps of the cell cycle are abnormal cell divide into the large and small daughter cell.

Therefore cell cytoplasm divides in the cytokinesis phase of the cell cycle, hence option c is correct.

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Answer:

I doubt two different species of birds can live on the same tree

Explanation:

Because they don't do the same thing the same time so it would result to competition.

Two different species of birds living in the same habitat would be the same type of nesting place. As a result, both species will compete for the nesting sites.

Because several species frequently coexist in the same areas and compete for the same resources, they engage in a range of interactions known as symbiosis.

Every living thing inhabits a certain ecosystem. Its natural environment is this ecosystem. Food, water, a refuge from the elements, and a location to produce young are all provided here in order for the organism to exist.

In places with adequate resources, creatures coexist peacefully, while in areas with plenty of resources, the ecosystem boasts a high species variety (diversity).

Therefore, the resources that organisms require to survive in air, water, food, and space are under competition.

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Answer:

A. Diaphragm

Explanation:

These muscles contract when we breathe in, expanding the lungs and taking in air.

Answer:

A. More than

Explanation: That's how many that grew

Answer:

More than

Explanation:

Answer:

check this book The Redwood Forest: History, Ecology, and Conservation of the Coast Redwoods

Explanation:

Answer:

If not opinionated its 1, 2, 4, and 5. Hope this helps

Explanation:

It’s opinionated i believe you can put what you want. It says what you want.

The challenges of traveling through space, to the moon, and doing science there. You might not have enough oxygen you have to survive.

A three-dimensional continuum that contains positions and directions is called space. While modern physicists typically consider it to be a portion of an unbounded four-dimensional continuum known as spacetime, physical space is frequently conceptualized in classical physics as having three linear dimensions.

It is believed that grasping the concept of space is essential to comprehending the physical cosmos.

Philosophers dispute on whether it is an entity in and of itself, a connection between entities, or a component of a conceptual framework.

Therefore, The challenges of traveling through space, to the moon, and doing science there. You might not have enough oxygen you have to survive.

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Answer:

radio frequency is the transfer of energy by radio waves

Explanation:

Answer: A. an interacting group of populations that occupy the same area.

The best describes a community is it is an interacting group of populations that occupy the same area. The correct option is A.

A community, commonly referred to as a biota is a group of organisms that coexist and communicate with one another within a habitat or environment. An ecosystem is made up of both the biotic community and the abiotic components, such as the physical environment.

Savanna is a good illustration. For protection, zebras and wild animals coexist in huge numbers. Herbivores are preyed upon by predators like lions and eagles for food.

There are two types of community:

Major - these are the big ecological unit, that regulates the flow of energy.

Minor - These are small communities that make up big communities.

Thus, the correct option is A. an interacting group of populations that occupy the same area.

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Answer:

CAAGGUCUC

Explanation:

To solve this question, we must know the base-paring rules of DNA and RNA.

Here is the following rule for a strand of DNA:

Adenine bonds with thymine  

Cytosine bonds with guanine

Now, here is the following rule for a strand of RNA:

Uracil bonds with Adenine

Cytosine bonds with guanine

By the way, the attachments that I provided are resources from my teacher on this topic!

So now that we know the following rules, we can use these rules to find the complementary strand of RNA, and to do this, all we need to do is simply use the base-pairing rules to find the complementary nitrogenous base (adenine, guanine, cytosine, uracil) for RNA.

[tex]GTTCCAGAG[/tex] → [tex]CAAGGUCUC[/tex]

In conclusion, the complementary strand of RNA for the DNA molecule is CAAGGUCUC.

Answer:

A) CAAGGTCT

Explanation:

The answer is A because A = T and C = G in the case of DNA matching. It's not CAAGGUCUG because Uracil is not part of the DNA sequence matching.

Hatcheries provide artificial shelter for fish versus the natural shelter found in a stream.

Compared to hatchery fish, wild fish are usually more successful at surviving the rigors of the natural environment long enough to reproduce. Fewer than 1% of the smolts released from the hatchery return home to spawn.

Answer:

Hatchery: A facility where eggs are hatched under artificial conditions, especially those of fish or poultry.

Fishery: Fishing: the catching, processing and marketing of fish or other seafood.

Answer:

Soil erosion occurs naturally by wind or harsh climatic conditions but human activities include overgrazing, overcropping and deforestation.

Explanation:

Complementary pairing goes like this:

A pairs with T and

C pairs with G. Nothing about this changes unless you get to mRNA (But we won't go into that) :)

So if you have a strand that goes TCG GA then your pairing will look like this:

T A

C G

G C

G C

A T

Please mark as brainliest answer

Answer:

I think it's B

Explanation:

This is if the egg is not fertilized which your question implies it is not.

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