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Cerrena [4.2K]
3 years ago
8

Crabs are organisms that have five pairs of legs. In certain species of crabs, the fifth pair of legs has a flattened, paddle-li

ke shape. Which of the statements below best explains how this adaptation has evolved?
A.Crabs were exposed to a toxin in the water.


B.Crabs with this adaptation have an advantage over other crabs to defend against predators in oyster beds.


C.Crabs needed this adaptation to dig into sand to find food so they developed the flattened paddle-like shape.


D.Crabs developed this adaptation because they needed to climb mangrove trees to hide themselves from predators.
Chemistry
1 answer:
Katyanochek1 [597]3 years ago
3 0

Answer:

A

Explanation:

Crabs were exposed to a toxin in the water.

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Beta decay by emitting an electron is called as β⁻ decay. When this happens, a neutron of the element converts into a proton by emitting an electron. Hence, the mass of daughter nucleus is same as parent atom but atomic number/number of protons is higher by 1 than atomic number of parent atom.

In a β⁻ decay, the symbol is used as ₋₁⁰β or ₋₁⁰e.
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A sample of ascorbic acid (vitamin C) is synthesized in the laboratory. It contains 30.0 g carbon and 40.0 g oxygen. Another sam
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Answer:

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