Which of the following refers to the discharge that results from menstrual flow?
a. the follicle
b. the lining of the endometrium
c. the blood from vessels on the outer side of the uterus
d. the corpus luteum
Ans: b. the lining of the endometrium
Biology & Microbiology
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Which of the following genera produce numerous useful antibiotics?
A. Clostridium B. Leuconostoc C. Helicobacterium D. Bacillus
Biology & Microbiology
The excretory system used by most annelids and adult mollusks consists of tubules called
a. nephrons. b. hepatic tubules. c. metanephridia. d. Malpighian tubules. e. protonephridia.
Biology & Microbiology
The largest trading partner of the United States is
a. Mexico. b. Canada. c. the European Union. d. Japan.
Biology & Microbiology
In which trophic level is biological magnification most likely to have a deleterious impact?
1.primary producer 2.primary consumer 3.secondary consumer 4.tertiary consumer
Biology & Microbiology