Answer:
D) a genetic bottleneck
Explanation:
Genetic bottleneck refers to the sudden reduction in the population size due to some adverse climatic factors such as natural calamities. It changes the allele frequencies since the survivor population mostly have different allele frequencies than the original population.
In the given example, an earthquake kills 98% of the squirrels. The survivor population exhibits different allele frequencies for the gene responsible for the thickness of stripes. Therefore, it represents a genetic bottleneck.
The first blank is osmosis, I'm not sure about the second
Answer:
Tropism can be called positive or negative. Positive tropism is movement or growth towards a stimulus, whereas negative tropism is the movement or growth away from a stimulus.
Explanation:
Answer:
the conclusive evidence about CFCs (chlorofluorocarbons) and the ozone layer of the earth.
Explanation:
Susan Solomon, Web of Science article reveals the conclusive evidence that CFCs (chlorofluorocarbons) could be destroying the protective layer of ozone in the earth’s upper atmosphere. CFCs are compounds that have the potential to destroy the protective layer of ozone (an oxygen compound) in the earth’s upper atmosphere.
