Characterize the life cycle of cnidarians.
A. All species have both polyps and medusae.
B. Some have only polyps, some have both polyps and medusae, and others have medusae and a reduced polyp stage.
C. Some species have only medusae and others have both polyps and medusae.
D. Some species have only polyps and others have both polyps and medusae.
E. Some species have polyps and others have medusae, but no species has both.
B. Some have only polyps, some have both polyps and medusae, and others have medusae and a reduced polyp stage.
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If a DNA template strand has a sequence of 3? TACAATGTAGCC 5?, then the RNA produced from it will be which sequence?
A. 3?TACAATGTAGCC5? B. 5?ATGTTACATCGG3? C. 5?AUGUUACAUCGG3' D. 3?AUGUUACAUCGG5? E. 3?ATGTTACATCGG5?
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What will be an ideal response?
What are organized clusters of membrane proteins that selectively allow substances to cross into and out of the nucleus?
a. nuclear pore b. passive transport protein c. receptor d. nuclear envelope e. ribosome
This disease most commonly occurs because
an enzyme that crosslinks fibrin strands into a stable mesh is defective. This disease is
a. sickle-cell anemia. b. hemophilia. c. atherosclerosis. d. hypertension. e. emphysema