In mammals, the nuclei resulting from the union of the sperm and the egg are first truly diploid after the _____
A) acrosomal reaction
B) completion of spermatogenesis
C) initial division
D) activation of the egg
E) completion of gastrulation
Answer: C
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Describe the ongoing research concerning the relationship between species richness and community stability. What
research supports or fails to support this relationship? What will be an ideal response?
Homo rudolfensis was discovered by
A. Raymond Dart. B. Richard Leakey. C. Charles Darwin. D. Donald Johanson.
To reduce water loss, stems and leaves are covered with a(n) ________
Fill in the blank(s) with correct word
Directional selection generates a phenotypic shift ________
A) away from either extreme of the phenotype B) toward an extreme of the phenotype C) toward both extremes of the phenotype D) toward the mean of the extremes of the phenotype