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Pepsi [2]
3 years ago
14

What are the levels of structural organization in the body of a shark

Biology
1 answer:
aalyn [17]3 years ago
3 0
These include the chemical. cellular. tissue organ. organ system and the organism level
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The advantage of excreting nitrogenous wastes as urea instead of ammonia is that:________ a) urea requires more water for excret
ICE Princess25 [194]

Answer: B

Explanation:

Ammonia is so toxic that it can be transported and excreted only in large volumes of very dilute solution. As a result most terrestrial animals simply don't have access to sufficient water to routine excrete ammonia.

The main advantage of urea is its very low toxicity. Animals can transport urea in the circulatory system and store it safely in high concentrations. Also much less water is loss when a given quantity of nitrogen is excreted in a concentrated solution of urea than would be in a dilute solution of ammonia.

4 0
3 years ago
In the peppered moth scenarios what is the variation? And the selection?
Morgarella [4.7K]

Variation is number of alleles for the wing color of the peppered moths. The wing color ranges from pure white to pure back.

Selection pressure is predation by birds.

Explanation:

In the wake of the industrial revolution, white-winged peppered moths had a large allelic frequency in the population compared to black-winged peppered moths. However, when the environment changed due to soot produced by industries (making the environment darker) white-winged peppered moths reduced while that of black moths increased.

This is because black moths were able to blend in and camouflage in the dark environment than white-winged peppered moths that stood out to their predators. Black moths, therefore, had an increased chance of reaching adulthood and passing their genes to the next generation. This increased the allelic frequency of black-winged peppered while that of white-winged moths reduced in the population.

Learn More:

For more on natural selection of peppered moths check out;

brainly.com/question/12918325

brainly.com/question/9231156

#LearnWithBrainly

8 0
3 years ago
How many chromosomes are there in a maize egg cell nucleus as compared to a maize pollen cell nucleus?
I am Lyosha [343]
The same number <span>chromosomes are there in a maize egg cell nucleus as compared to a maize pollen cell nucleus</span>
5 0
3 years ago
Which is composed of amino acids and determines all the structures and functions of organisms?
Mice21 [21]

Answer:

protein

Explanation:

7 0
3 years ago
what characteristics of sponges led scientists to conclude that sponges probably evolved separately from other animals?
sveticcg [70]
They lack true tissues and organs and have no body symmetry. hope it helps
3 0
3 years ago
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