Marine snow refers to:
a. neston.
b. seston.
c. cobwebby aggregates of mucus.
d. fecal pellets.
e. necktonic organisms.
C
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Population dispersion is the ____
a. statistical description of the relative numbers of individuals in each age class b. number of individuals per unit area
c. number of individuals in a population d. average time between the birth of an organism and the birth of its offspring e. spatial distribution of individuals within a geographical range
Which of the following is a characteristic of a K-selected species?
a. large but few offspring b. small but many offspring c. low parental care d. early self-sufficiency
In the conversion of pyruvate to ethanol, what is produced?
a. acetaldehyde only b. carbon dioxide only c. NADH only d. acetaldehyde and carbon dioxide e. acetaldehyde, carbon dioxide, and NADH
The products of Hox genes act as:
A: segment polarity genes. B: transcription factors. C: morphogens. D: hormones. E: gap genes