What do the DNA sequences found at the origins of replication signify?
What will be an ideal response?
binding replication enzymes
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Based on the figure below, how many groups (clusters) of Hox genes does each type of animal have?
A. Mammals: 4 groups; Flatworms: 4 groups; Sponge: 2 groups; Anemones: 1 group.
B. Mammals: 4 groups; Flatworms: 4 groups; Sponge: 1 groups; Anemones: 2 group.
C. Mammals: 11 groups; Flatworms: 4 groups; Sponge: 1 groups; Anemones: 4 groups.
D. Mammals: 27 groups; Flatworms: 4 groups; Sponge: 2 groups; Anemones: 1 group.
E. All animals must have at least 2 groups because all animals have a posterior and anterior end.
Plants having the ability to take up organic nitrogen are most likely in which of the following
environments?
a. arctic tundra d. grassland b. salt marsh e. temperate forest c. tropical forest
In animals with a brain, the two major divisions of the nervous system are the
a. autonomic and peripheral systems. b. central and peripheral nervous systems. c. brain and spinal cord. d. nerves from the brain and the peripheral systems. e. cranial and spinal nerves.
Different molecular forms of the same gene are __________.
Fill in the blank(s) with the appropriate word(s).