The answer is A.
Why: The heart is part of an organism, so that doesn't exactly count. Soil is not alive, and neither is clay. Therefore, Bacteria must be it. Bacteria is a living thing, and can function by itself.
Answer:
The grey squirrel has increased their rate of emigration to the UK
The population size of a predator species is directly controlled by the population size of it's prey. If the predator has no prey the population size will go down because they have no food.
Answer:
crossing over
Explanation:
Crossing over is where homologs can exchange DNA which leads to genetic variation
Answer:
B)Cholesterol in the membrane
Explanation:
Membrane fluidity is affected by fatty acids. More specifically, whether the fatty acids are saturated or unsaturated has an effect on membrane fluidity. ... Membrane fluidity is also affected by cholesterol. Cholesterol can make the cell membrane fluid as well as rigid.