A serous membrane contains both epithelial and connective tissue
Answer:
The partial pressure of oxygen is high in the alveoli and low in the blood of the pulmonary capillaries
the key element in the ecological concept of species is that individuals within a species can successfully interbreed and conceive healthy offspring
Answer:
Plants are classified based on these 3 characteristics: The evergreen plants are plants that retain leaves at all times.
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The control group is the one not given calculators because they are the “as seen in nature” group. The experimental group would be the ones with calculators.
