From earliest to latest, the overall sequence of early development proceeds as follows:
A) gastrulation ? organogenesis ? cleavage
B) ovulation ? gastrulation ? fertilization
C) cleavage ? gastrulation ? organogenesis
D) gastrulation ? blastulation ? neurulation
E) preformation ? morphogenesis ? neurulation
Answer: C) cleavage ? gastrulation ? organogenesis
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Most plants are firmly rooted in place and are not mobile. Which of the following is not an adaptation to this condition?
A. growth by mitosis B. the presence of hairs, spines, and toxins C. the ability to survive long periods of unfavorable conditions D. cell walls
Which of the following is not a type of connective tissue?
a. bone b. muscle c. blood d. cartilage
The eukaryotic chromosome is composed of ____
a. DNA only b. RNA only c. DNA and carbohydrate d. DNA and protein e. RNA and protein
When an ecologist compares the diversity of different communities by counting the number of species within each community, the measure of diversity being used is called
A) species evenness. B) species diversity. C) species richness. D) relative abundance.