Older people are more likely to develop autoimmune diseases. One possibility is
a. a heightening of the immune response associated with age.
b. an increase in the number of T cells.
c. an increase in the activity of B cells.
d. a reduction in DNA repair mechanisms leading to a change in self-markers.
e. viral infections.
D
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Reinforcement is most likely to occur when _____
A) the environment is changing B) hybrids have lower fitness than either parent population C) prezygotic isolating mechanisms are in place D) gene flow is low
Stable annealing due to hydrogen bonding between DNAs of similar nucleotide sequence from different organisms is referred to as ________.
A. hybridization B. hydrolysis C. restriction D. ligation
A hormone released in the small intestine that stimulates the pancreas to release digestive enzymes and the gallbladder to release bile is known as ________
A) gastrin B) secretin C) cholecystokinin D) vasoactive intestinal peptide
What is the net gain of ATP molecules in glycolysis?
A.) 1 B.) 2 C.) 6 D.) 34