Manipulative experiments:
a. allow scientist to directly assess how changes in one component of a system influence the oth-er components.
b. allow scientists to examine not only correlations among data, but also causality.
c. ideally alter only one variable at a time.
d. All of the above.
D
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In humans, where does lactose digestion occur?
a. stomach b. mouth c. small intestine d. pancreas
The final step in the development of eukaryotic cells was likely ____
a. duplication of function in the endosymbiont and host cell b. transfer of genes and function from the endosymbiont to the host cell c. circularization of DNA d. formation of membrane-bound organelles
e. ingestion of photosynthetic bacteriaWhat is dosage compensation with respect to the sex chromosomes, and how is this accomplished in
humans? What will be an ideal response?
Sepals are:
A) pollen receptacles on a carpel. B) leaf-like structures that protect a flower before it opens. C) insect-attracting structures of the flower. D) pollen-producing structures.