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lisabon 2012 [21]
3 years ago
13

It has been reported that the DNA of the elephant shark has barely changed over the last 420 million years. Which statement expl

ains why the elephant shark has not changed over time?
Many variations existed in the species.
Several mutations took place in the species.
Their environment remained fairly constant over time.
They were exposed to severe competition for food and a mate.
Biology
2 answers:
dmitriy555 [2]3 years ago
8 0
Their environment remained fairly constant over time
kiruha [24]3 years ago
5 0

Answer:

c

Explanation:

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ikadub [295]

Answer:

Brown is the dominant gene and white is the recessive gene.

Explanation:

If brown were to be dominant then the mice would most likely all be brown unless the got both a white from mom and dad which is most likely due to brown being recessive the dad could be part white you just wouldn't see it. And since the mother is white all of the mice get a white gene from the mom and since the dad most likely has a white gene hidden inside of him only tow mice became fully white while the siblings were brown.

Hope this helps.

6 0
3 years ago
The wing of a bat is homologous to the _____ of a whale. the wing of a bat is homologous to the _____ of a whale. baleen flipper
Gre4nikov [31]
The wing of a bat is homologous to the flipper of a whale. Homologous structures are structures that have a similar ancestries and common traits but maybe not have the same function in an organism. For example the arm of a human, the wing of a bird or a bat, the leg of a dog and the flipper of a dolphin or whale are homologous structures. 
7 0
3 years ago
The small intestine begins with the _____ and ends with the ___
weeeeeb [17]

The answer is it begins at the PYLORIC SPHINCTER and ends at the ILEOCECAL SPHINCTER. The pyloric sphincter is a group of smooth muscle at the joint between the pylorus of the stomach and the duodenum of the small intestine. It plays a vital role in digestion, where it acts as a valve to controls the flow of moderately digested food from the digestive to the small intestine. Ileocecal is a sphincter muscle valve that split up the small intestine and the large intestine.

7 0
3 years ago
What is the process of the ocean floor adds new material to its ocean floor called?
Leni [432]
Sea floor spreading. 
6 0
3 years ago
The term chemicals in this diagram represents
____ [38]

Answer:

C. hormone molecules

Explanation:

hormones are secreted in glands and are transported to the organs where they affect it and cause changes.

7 0
3 years ago
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