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3 years ago

Describe a sea-level regression.

Biology

1 answer:

Deffense [45]3 years ago

8 0

Answer:

The exposure of sea bed or undersea surface is called sea-level regression.

Explanation:

Sea-level regression occurs when sea level drops down due to several climatic changes. This triggers extinction of several species. There had been several mass extinctions in the past due to sea-level regression. 

Chances of survival of shallow water species become feeble when the sea level falls. In the case of mass extinctions regression can be seen as a symptom and not a cause.

Marine transgression is the opposite phenomena of regression where sea level rises and covers the land which was previously above the sea level.

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The Permian-Triassic extinction 250 million years ago wiped out about ninety percent of Earth's animal species. Some scientists

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Describe two types of living things that biologists could study.

Maslowich

Answer:

Animals or Plants

Explanation:

Describe two types of living things that biologists could study. Think about types of living things that are not in the ocean — what categories of living things are on land?(5 points)Two types could be animals and plants. Different categories that I know of are like reptiles, birds, and amphibians. 4.

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3 years ago

In water snakes, body color is controlled by two alleles that display incomplete dominance. Snakes with the BB genotype are brow

Rainbow [258]

Answer:

Phenotypic ratio= 1 Brown : 1 Gray

Explanation:

Genotype of brown snake= BB

genotype of gray snake= Bb

A cross between brown (BB) and gray (Bb) snake obtains progeny in following phenotypic ratio= 1 Brown : 1 Gray

Here, the heterozygous parent, gray snake (Bb) forms two types of gametes in 1:1 ratio while the homozygous dominant parent, brown snake (BB) forms only one type of gamete.

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