Biochemical changes that occur in organisms through time can help us
A. understand how groups of organisms changed through time.
B. infer relatedness.
C. construct molecular family trees.
D. All of the options are correct.
Answer: D
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The size of the mouse (M. musculus) genome is 2700 megabases (Mb) and it contains about 25,000 genes arranged on 40 chromosomes. If the genes are evenly distributed on chromosomes in the mouse, what is the average number of genes per chromosome?
A) 1 B) 9.3 C) 67.5 D) 625
When blood glucose levels decrease (as between meals), what reserves are tapped first?
a. glycogen b. fats c. proteins d. steroids e. amino acids
Receptors for activated complement proteins are found on ____
a. dendritic cells, macrophages, and neutrophils b. mast cells, macrophages, and neutrophils c. dendritic cells, B lymphocytes, and neutrophils d. dendritic cells, eosinophils, and macrophages e. monocytes, T lymphocytes, and B lymphocytes
A kidney dialysis machine
a. may cleanse the patient's blood outside the body. b. may use the patient's abdominal cavity as the site for solute exchange. c. may use hemodialysis. d. may use peritoneal dialysis. e. may do all of these