Filter-feeding is used by
a. sea squirts.
b. clams.
c. sponges.
d. lancelets.
e. all of these.
Filter-feeding is used by
a. sea squirts.
b. clams.
c. sponges.
d. lancelets.
e. all of these.
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What structure will help prevent the backflow of blood within the veins?
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Distinguish between exocrine and endocrine glands
What will be an ideal response?
Migrating cells move around the developing embryo using ____
a. electrical signals b. genetic markers c. apoptosis d. adhesive cues e. osmosis gradients
In the original experiments by Stanley Miller and Harold Urey to synthesize organic molecules in an abiotic environment, which one of the following would you NOT expect to find in the collection flask?
A. adenine B. ATP C. formaldehyde D. urea E. amino acids