<span>Fossil record, genetics, and examples of local adaptations all support the theory of evolution by natural selection.</span>
Viruses are actually smaller than bacteria but they're not bacteria. So D is wrong.
Viruses don't grow and aren't made of cells, and despite being able to reproduce, they're not living. So C is correct.
As for the other two, I'm not entirely sure what they mean but C is the answer.
Answer no 1 is correct :)
The right answer is D.
Like any physiological regulation, thermoregulation involves sensors, integrating centers, effectors. The mechanisms of thermogenesis (heat gain) and those of thermolysis (heat loss) are differentiated. In humans, however, the most powerful form of thermoregulation is behavioral thermoregulation: putting on or taking off a garment, changing posture, moving around, taking shelter, and so on.
It is a behavioral adaptation.
There are three types of adaptations:
Structural - body parts that help it survive (e.g. color, size, shape)
Physiological - systems present in an organism that allow it a special feature (e.g. venom, skin color changes)
Behavioral - an action that allows the organism to better survive
