During gastrulation, three tissue layers form: the outer __________, the inner __________, and the __________ in
between the first two layers. Fill in the blank(s) with the appropriate word(s).
ANSWER: ectoderm; endoderm; mesoderm
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Ovulation typically occurs on day ____ of a 28-day ovarian cycle
a. 1 b. 7 c. 10 d. 14 e. 28
What step of inflammation is delayed by heparin released from mast cells and basophils?
A) Additional leukocytes are recruited to the region. B) Capillaries dilate and become more permeable. C) Infection is cleared by phagocytosis. D) Macrophages engulf debris and foreign matter. E) Foreign matter is contained.
The chordate notochord is a dorsal longitudinal rod composed of cartilage. Indicate whether the statement is true or false
An effective vaccine to prevent infection with Epstein-Barr virus (EBV, HHV-4 ) is available
Indicate whether the statement is true or false