A cross section of a leaf shows that it is a complex organ built of several different kinds of specialized tissues. The tissues, in turn, are built of specialized cells, and the cells, of organelles. Epidermis covers the upper and lower surfaces of the leaf.
Answer:
Hormones act only on cells not structures.
Explanation:
Hormones act only on cells and they do not act on other structures because there are specific cells have receptors for that particular hormone. Some hormones bind itself to the receptors on the surface of target cells whereas other hormones enter the cells and bind itself to the receptors present in the cytoplasm or nucleus of the cell.
Answer: fossil records
Explanation: there where the same species on different continent's
A researcher is studying the science of attractiveness and asks volunteer test subjects to rank what trait they find most attractive in a person. What type of variable is the dependent variable in this experiment?
-Categoric
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