Which of these is a cost of using fossil fuels?
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a. they create jobs for many people worldwide.
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b. they are used to heat homes and generate electricity.
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c. they are used to make plastics and synthetic materials.
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d. they produce pollutants that harm people.

Why is it important that fibrin is insoluble in water?

The spermists believed that: the male made the only hereditary contribution to the offspring the male and female traits were blended in the offspring the female made the only hereditary contribution to the offspring the male and the female made equal contributions to the next generation

During a fierce storm a large number of tall trees on an island are uprooted by the wind and die. most of the trees on the island are now short trees and produce seeds that grow into short trees. what concept is shown in this example? question 5 options: natural selection artificial selection genetic engineering gene splicing