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natka813 [3]
3 years ago
7

According to the fossil record, how long did the transition from fully terrestrial to fully aquatic whales take?

Biology
1 answer:
Serga [27]3 years ago
4 0
65 million years, if I remember correctly 
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Wheat production W in a given year depends on the average temperature T and the annual rainfall R. Scientists estimate that the
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Answer:

-1.1

Explanation:

Data provided in the question:

Average temperature is rising at a rate, \frac{dT}{dt} = 0.15°C/year

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Now,

we need to calculate \frac{dW}{dt}

since,

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thus, Using the chain rule , we have

\frac{dW}{dt} = \frac{\delta W}{dT}\times\frac{dT}{dt} +  \frac{\delta W}{dR}\times\frac{dR}{dt}

on substituting the respective values, we get

\frac{dW}{dt} = -2 × 0.15 +  8 × (-0.1)

or

\frac{dW}{dt} = -0.3 - 0.8

or

\frac{dW}{dt} = -1.1

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