Answer:
The reason the immune system makes memory cells is to help the body recognize a sickness they have experienced before and react to it.
Explanation:
Answer;
(1) the fossil record of ancient life-forms
Natural selection and its evolutionary consequences
provide a scientific explanation for the fossil record of ancient life-forms
Natural selection and its evolutionary consequences provide a scientific explanation for the fossil record of ancient life forms, as well as for the striking molecular similarities observed among the diverse species of living organisms.
Answer:
make objective observations.
Explanation:
Answer:
Sexual selection in humans concerns the concept of sexual selection, introduced by Charles Darwin as an element of his theory of natural selection, as it affects humans. This has shaped our evolution for many years, but reasons why humans choose their mates are hardly understood.
Explanation:
Overall, photosynthesis is a process that takes water, carbon dioxide, and sunlight, and converts it into oxygen and glucose.
The inputs of photosynthesis are light energy, and matter in the form of water absorbed through the roots, and carbon dioxide absorbed through the leaves. Photosynthesis also has matter and energy outputs.
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