The independent variable in an experiment is

OA) the same in every experiment

OB) the variable scientists observe for changes

O C) the variable that is changed by the scientist

OD) the thing that is kept constant during the experim

How do sulfur and phosphorus move from the biotic to the abiotic pools during their cycles? A) Primary consumers eat producers. B) Secondary consumers eat primary consumers. C) Plant material is deposited in layers of ponds and lakes.

Acceptable Macronutrients Distribution Ranges refer to healthy ranges of intake for carbohydrate, fat, and protein. True False

Which is a function of cyclins? A) Cyclins are carbohydrates that regulate DNA during the mitosis phase of the cell cycle. B) Cyclins are glycoproteins that repair DNA in the beginning of the cell ccle.

Which sentence summarizes the water cycle? a) The water on earth changes forms as it moves from one reservoir to another. b) Water in the atmosphere must be converted to another chemical before animals can use it.

Which is an example of interdependent body systems working together to maintain homeostasis?

Unlike bryophytes, ferns A. have vascular tissue. B. exhibit alternation of generations. C. utilize photosynthesis. D. have to get water from the environment.

Modern cell theory is best described as being based on

The internal iliac arteries supply blood to the A. diaphragm. B. urinary bladder and rectum. C. lower leg. D. spleen. E. reproductive organs.

What cells are made from already existing cells

How is mitosis different in plants and animals? A. In animals, the cell membrane pinches together. B. In plants, the DNA is one circular chromosomes. C. In plants, there are no sister chromatids. D. In animals, a new cell wall forms.