What is the primary cause of the symptoms associated with rheumatoid arthritis?
a. degeneration of osteoblasts
b. degeneration of osteoclasts
c. accumulation of synovial fluid
d. accumulation of articular cartilage
e. thickening of bone tissue
c
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Histones bond to DNA by ____ of DNA
a. an ionic attraction to the phosphate groups b. hydrogen bonding to the deoxyribose sugars c. an ionic attraction to the nitrogenous bases d. hydrogen bonding with the nitrogenous bases e. covalent bonds to the deoxyribose sugars
Which of the following is TRUE of xylem?
a. It conducts water downward in the plant. b. It transports food upward in the plant. c. It transports minerals and water throughout the plant. d. It transports material from stem to leaf. e. It supports the plant stem.
One function of the developing follicle is to:
a. stimulate ovulation. b. secrete progesterone. c. secrete estrogens. d. secrete prolactin. e. secrete glycoproteins, which promote sperm motility.
A mutation in the SHH gene may cause which of the following?
A. Anencephaly B. Chiari Formations C. Holoprosencephaly D. Schizencephaly E. Spina Bifida