Answer:
Stimulus
Explanation:
this happens when the external effects in the environment affects the a body internally
Matter and energy are transfered by:
Living:other animals eating eachother, but when doing this the animal that just ate the organisim it gains less energy than the animal before it beacsue it used some of that energy
Non-Living:When water goes into the atmosphere its energy and matter are going into the air and it does the same thing when it falls as percipitation.
Answer:
Autotrophs are the plants which prepare their food by photosynthesis.
Explanation:
Answer:
a
Explanation:
Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.
Answer:
Hemoglobin, or red blood cells, are primarily transporters of oxygen. These cells receive oxygen as air is breathed in through the lungs. Oxygen binds itself to these cells, which then carry it to the heart. The heart circulates the oxygenated blood to cells throughout the body in the process of cellular respiration.
Explanation:
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