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Questions in biology

[Free] What are the three main functions of the nervous system? Give an explanation of each.

[Free] What would happen if the keystone species of hummingbirds were removed from their ecosystem?

[Free] What are the three structural components of a nucleotide? A. A carboxyl, a sugar, and a phosphate B. A phosphate, an amino acid, and a carboxyl C. An amino acid, a carboxyl, and a phosphate D. A sugar, a phosphate, and a nitrogenous base E. A nitrogenous base, an amino acid, and a sugar

[Free] What are three differences between univalves and bivalves?

[Free] Which structure allows photosynthesis to begin in a germinating dicot plant? A. Cotyledon B. Endosperm C. Embryonic root D. Apical meristem E. Lateral meristem

[Free] Very thick stems are specialized for: A. Clinging and climbing B. Strength and support C. Storing water or food D. Photosynthesis

[Free] What two ideas from geology were important to Darwin's thinking?

[Free] What effect does temperature have on the characteristics of magma?

[Free] How can a clam function with such a simple nervous system?

[Free] i just need help with this i dont get it