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3 years ago

Overfishing of (blank)

Biology

1 answer:

sweet [91]3 years ago

3 0

Answer:

Overfishing can have an adverse effect on marine biodiversity. ... Overfishing can wreak havoc and destroy the environment and marine ecology and completely disrupt the food chain. For example, herring is a vital prey species for the cod. Therefore, when herring are overfished the cod population suffers as well.

Explanation:

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Why is recombinant dna also referred to as genetic engineering?

aev [14]

Recombinant DNA is DNA that has been created using intelligent design methods to modify a base DNA molecule using DNA component elements from other strands of DNA of other organisms. There are a wide range of possible DNA elements that can be removed, added to or otherwise modified to produce the new recombinant form.

Recombinant DNA technology clearly is genetic engineering using intelligent design as the selection and placement of the added DNA components must be planned and precisely selected and placed to accomplish the intended result. It does not happen naturalistically.

There are numerous aspects of the growing technology of recombinant DNA that modify DNA to serve the purpose of the intelligent designers, including wide ranges of research, medicine, synthetic biology, potential commercial products and even scientific curiosity.

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3 years ago

Explain what cells are and why there important

VikaD [51]

Answer:

Cells are the basic structure and unit of life. There are prokaryotic and eukaryotic cells. Prokaryotic cells are very basic, and have no nucleus, few organelles, and are ususally bacteria. Eukaryotic cells are more complex and have nuclei, are larger compared to prokaryotic cells, more organelles, and have emembrane bound organelles. There are plant and animals cells, each have certain organelles that other don't. For example, plant cells have large vacuoles and a cell wall; animal cells have centrioles. Cells are important because they provide strucure for the body, and take in nutrients from food and carry out many important functions, such as protein synthesis, respiration, growth and development, and more. Billions of cells make up a complex organism's body, while a single cell can make up an entire organisms, and carry out all of the needed functions. That's a quick summary of what cells are, and some of the things that they do that make them so important

Explanation:

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3 years ago

All of the following are true about RNA except:

Nezavi [6.7K]

Answer: A

Explanation:

5 0

3 years ago

Read 2 more answers

A young couple went to see a genetic counselor because each had a sibling affected with cystic fibrosis. (Cystic fibrosis is a r

mel-nik [20]

Answer:

a) The correct answer is 1/2 or 0.5

Cystic fibrosis is a recessive disorder and her sibling has a disease but none of the parents had it. Thus, each of the parents must be the carrier of the disease, that is, both of them must be heterzygous.

So, if we cross Cc x Cc, it results in the genotype ratio of 1 (CC) : 2 (Cc) : 1 (cc)

Thus, 2 out of 4 would be the carrier of the disease.

b) 1/16

The probability of female to the carrier is 1/2

Same is the case with male partner due to the probability that he would be the carrier is 1/2

If both are carrier then, there is only 1/4 chances that the offspring will have the disease (as per cross shown above).

Now, the probability that the offspring will have the disease = product of all the above probabilities. (The probability of occurrence of two independent events is equal to the product of their individual probabilities).

So, $\frac{1}{2}x\frac{1}{2}x\frac{1}{4}$ = $\frac{1}{16}$

c) 1/8

The probability of female to be the carrier is 1/2

The probability male to be the carrier is 1/2

If both are carrier then, there is only 2/4 chances that the offspring will be the carrier of the disease (as per cross shown above).

Now, the probability that the offspring will be the carrier = product of all the above probabilities. (The probability of occurrence of two independent events is equal to the product of their individual probabilities).

$\frac{1}{2}x\frac{1}{2}x\frac{2}{4}$ = $\frac{1}{8}$

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3 years ago

Use Darwin's theory of natural selection to explain how the elephant's trunk evolved

schepotkina [342]

An elephant's trunk evolved in order to be able to stuff in and eat as much food as it can to become the big animal it is today.
The elephant's ancestors were small and had a short nose. As it turns out, the larger body size the elephant has, the more chance it gets to survive and pass on its genes to the next generation. In order to gain a larger size, it needed to eat more and be able to reach more food. Of course, its small nose wasn't capable of doing that at the time. So, through natural selection, eventually the elephants that were bigger, had longer trunks, and therefore ate more, were more likely to pass on their genes to the next generation than their smaller counterparts, and therefore with each generation elephants got longer trunks.

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3 years ago