Which is incorrect about cnidarians?
A. They exhibit radial symmetry.
B. They are herbivores that eat phytoplankton only.
C. They exist as medusae and/or polyps.
D. Medusae are commonly called jellyfish.
E. They undergo extracellular digestion.
Answer: B
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Which of the following provides the likeliest explanation for the differences seen in the human population?
A. presence of parasites in different areas B. amount of sunlight in different areas C. the altitude in different areas D. natural selection
Reactions that remove the equivalent of a water molecule when subunits are joined to make a larger molecule are called
____ reactions.
a. equilibrium b. hydration c. hydrolysis d. redox e. dehydration synthesis
Why have so few primates gone extinct compared to other species, such as mussels or birds?
a. Primates have large brains. b. Primates are not killed for food or other human uses. c. Primates live in stable environments. d. Primates are among the most closely monitored and protected species. e. Primates are highly mobile.
The enzyme lactase splits the lactose molecule into ____________ and ____________. Fill in the blank(s) with the appropriate word(s)