Humans belong to which subgroup of mammals?
A. Eutherians
B. Monotremes
C. Cetaceans
D. Marsupials
Answer: A
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In asexual reproduction, new combinations of genes arise by
a. mutation. b. random segregation of chromosomes into gametes. c. random assortment of gametes. d. crossing over. e. new combinations of genes do not occur.
At what point during development does the embryo form three germ layers?
A. when the nervous system develops B. when it forms the inner cell mass C. when it becomes recognizable as human D. when it begins cleavage E. when it forms the gastrula
The stomach is involved in four of the following. Which one is NOT a function of the stomach?
a. It begins carbohydrate digestion. b. It mixes food. c. It stores food. d. It begins protein digestion. e. It regulates passage of food into small intestines.
This group of proteins can actually punch holes in pathogenic cells
A) complement system B) interleukin I C) fibrinogens D) histamines