Four of the five events listed below occur after
fertilization. Select the exception.
a. cleavage
b. gametogenesis
c. blastula formation
d. gastrulation
e. organogenesis
Answer: b
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Indicate whether the statement is true or false.
A species that plays a critical role in maintaining the structure of an ecological community and helps to determine the types and numbers of various other species in the community is known as
A. a predator. B. a keystone species. C. the primary species. D. the dominant species. E. the alpha species.
The blastocyst implants in the endometrium about 7 days after fertilization
Indicate whether the statement is true or false
You are researching a family with a heritable disease whose symptoms include hyper-flexible joints, pliable skin, stretchy ligaments, and fragile muscles that tear easily. You plan to use genetic testing to determine the cause of the disease. Which gene do you sequence first?
A. epidermal growth factor B. actin C. myosin II heavy chain D. collagen