Certain poisons are toxic to organisms because they interfere with the function of enzymes in mitochondria. This results directly in the inability of the cell to

A stable pond ecosystem would not contain

At warm temperatures, a certain bread mold can often be seen growing on bread as a dark-colored mass. The same bread mold growing on bread in a cooler environment is red in color. Which statement most accurately describes why this change in the color

Although all of the cells of a human develop from one fertilized egg, the human is born with many different types of cells. Which statement best explains this observation?

Asexually reproducing organisms pass on hereditary information as

Humans require organ systems to carry out life processes. Single-celled organisms do not have organ systems and yet they are able to carry out life processes. This is because

Certain insects resemble the bark of the trees on which they live. Which statement provides a possible biological explanation for this resemblance?

Kangaroos are mammals that lack a placenta. Therefore, they must have an alternate way of supplying the developing embryo with

When is extinction of a species most likely to occur?

Which substance is the most direct source of the energy that an animal cell uses for the synthesis of materials?

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