How are populations, ecosystems, and communities related?
a. a community consists of an ecosystem and its physical environment, and an ecosystem is made up of many different populations of organisms.
b. a population consists of a community of organisms and its physical environment, and a community is made up of many different ecosystems.
c. an ecosystem consists of a community of organisms and its physical environment, and a community is made up of many different populations of organisms.
d. an ecosystem consists of a population of organisms and its physical environment, and a community.

Use this diagram of an animal cell to answer the question. where does the first stage of cellular respiration occur? w x y z

Interpret the model. a three-part model with black right-arrows between the parts. left part: a large green apple-shaped component with a w-shaped indentation centered on top. a small blue apple-slice shape sits above the left indentation and an arrow points from the shape to the indentation. a small purple apple-slice shape and arrow sit above the right indentation and an arrow points from the shape to the indentation. middle part: a large green apple-shaped component with a square indentation centered on top. sitting in the left side of the indentation is a blue apple-slice shape with a flat bottom, fused to a purple apple-slice shape with a flat bottom on the right side of the indentation. right part: a large green apple-shaped component with a w-shaped indentation centered on top. an up-arrow is centered above the indentation pointing to a fused blue and purple apple-slice-shaped flat-bottom component sitting above the indentation. assigne "true" or "false" to the end of each statement. the model shows a shape change occurring in the enzyme after the substrate is bound in the active site. t/fthere are two products in this model. t? f there are three substrates in this model. t/f the model shows two different enzymes. t/f

Why does the skin of your finger shrink when you wash clothes for a long time?