The human placenta is formed by the interaction of uterine tissue and what extraembryonic tissue?
A. Chorion
B. Yolk sac
C. Embrion
D. Allantois
E. Amnion
Answer: A
You might also like to view...
Connective tissue contains three types of fibers: collagen, elastic, and cartilage. Indicate whether the statement is true or false
Which general term is used to group various biological and behavioral properties of organisms that act to prevent or reduce interbreeding?
A) allopatric speciation B) reproductive isolating mechanisms C) inbreeding D) phyletic evolution E) genetic divergence
Peristalsis
a. is an involuntary smooth muscle response to swallowing. b. is a voluntary smooth muscle response to swallowing. c. is controlled by muscles surrounding the trachea. d. occurs when food enters the airway instead of the esophagus. e. is both b and c.
The three types of plastids in plants are ___, ____ and ___.
Fill in the blank(s) with the appropriate word(s).