The ____ has a digestive tract
a. coral
b. earthworm
c. flatworm
d. hydra
e. sea anemone
ANSWER: b
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The two organelles that contain their own nuclear genome are:
A. Golgi apparatus and mitochondria. B. endoplasmic reticulum and mitochondria. C. Golgi apparatus and endoplasmic reticulum. D. mitochondria and chloroplast. E. chloroplast and vacuole.
The drug mifepristone (RU-486) is a contraceptive that ____
a. blocks passage of sperm through the male reproductive tract b. blocks passage of sperm through the female reproductive tract c. prevents ovulation d. causes shedding of the endometrial lining and any implanted embryo e. prevents implantation by blocking estrogen receptors in the uterus
In humans, what is the primary role of pepsin?
a. Digesting protein in the stomach b. Breaking down carbohydrates c. Reabsorbing water d. Storing glycogen in the liver
Which of the following represents
xenotransplantation?
a. cows resistant to mad cow disease b. goats that produce spider silk c. corn with Bt genes d. pigs carrying human livers e. more than one of these represents xenotransplantation