The stomach secretion that aids in vitamin B12 absorption is ____
a. pepsinogen
b. amylase
c. HCl
d. gastrin
e. intrinsic factor
ANSWER: e
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A common hypothesis and casual assumption is that dogs originated from wolves. Because of the wide range of body sizes and shapes, other hypotheses include dog ancestry of jackals, coyotes, dingoes, or other wild dog species. In recent years, several studies have been done to clear up the lineage. One study tested the Y chromosome DNA that can only be passed down from male to male, and the other other study tested the mitochondrial DNA because
A. the mitochondrial DNA records the inherited genetics of all the male and female parents of each generation. B. the mitochondrial DNA contains genes that could code for dog size. C. the mitochondrial DNA is only passed down through females to each new generation. D. the mitochondria perform cellular respiration, providing energy to speed up the DNA analysis. E. the mitochondrial DNA is much smaller, easier, and faster to analyze for the dog lineage.
For some seeds to germinate,
a. they must first be exposed to a critical low temperature for a certain length of time. b. they must be exposed to proper environmental conditions of temperature and moisture. c. something must remove the restrictive seed coat. d. something must remove the hormones that promote dormancy. e. all of these must occur.
In a patient who is exhibiting signs of graft-versus-host disease, which cell type is most likely responsible for the reaction?
A. B cells B. T cells C. Macrophages D. Eosinophils
peroxisomes
What will be an ideal response?