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A consequence of hyperparathyroidism includes:

Some understory plants in dense tropical rain forests have very large leaves. Which of the following is the most likely selective advantage of these leaves?

Which of the following are produced by lateral meristems?

A nephron is one unit of the kidney.  It should include all of the following EXCEPT:

Agenesis of an endocrine gland is best described as 

You are given an unknown organism to identify. It is unicellular and heterotrophic. It is motile, using many short extensions of the cytoplasm, each featuring the 9 + 2 filament pattern. It has well-developed organelles and two nuclei, one large and one small. To which of the following groups does this organism likely belong?

Many parasitic members of the excavates lack plastids and have highly reduced mitochondria. Which of the following statements explains these observations?

The observation that both charophytes and green plants contain chlorophylls a and b is more consistent with which of the following claims?

Immature seed cones of conifers are usually green before pollination, and flowers of grasses are inconspicuously colored. What does this indicate about how they are pollinated?

In onions (Allium), cells of the sporophyte have 16 chromosomes within each nucleus. How many chromosomes should be in an endosperm nucleus?