Dogs have a diploid chromosome number of 78 . How many chromosomes do their gametes have?
a. 39
b. 78
c. 156
d. 234
A
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Members of the Ecdysozoa (select all that apply)
A. secrete a cuticle made of protein. B. secrete a cuticle made of calcium carbonate. C. molt during growth. D. have trochophore larvae. E. have lophophores.
In a partially mixed estuary the salinity
a. is extremely variable from place to place. b. is stratified with lower salinity near the bottom. c. is lower than the ocean but relatively homogenous. d. increases with depth.
Offspring with four phenotypes in a 1:1:1:1 ratio can be produced by
A. AaBb ´ AaBb. B. AABB ´ AaBb. C. AaBa ´ AABb. D. AaBb ´ aabb.
Which one of the following effects is NOT the effect of auxin?
A. Promotes growth by cell enlargement B. Promotes apical dominance C. Stimulates formation of roots on a shoot D. Stimulates division of shoot apical meristem cells E. Stimulates development of lateral buds