The centromere
A. is a region of DNA where sister chromatids associate.
B. is a group of proteins that attach to the kinetochore.
C. is only present when chromosomes are highly compacted.
D. is a group of proteins that attach to the mitotic spindle.
E. is not present on the chromosomes of the daughter cells until the S phase.
E. is not present on the chromosomes of the daughter cells until the S phase.
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When solute is added to food products, the water activity (aw)
A) increases. B) decreases. C) remains the same. D) initially increases and then decreases.
This arthropod is a filter feeder, a
hermaphrodite, and the only arthropod that secretes an external shell. This arthropod is ___.
a. an isopod b. a barnacle c. a centipede d. a krill e. more than one of these
Osteoporosis is a condition characterized by
a. excessive build up of bone calcium deposits. b. hardening of the arteries in the bone. c. loss of bone mass. d. excessive rigidity of some bones. e. curvature of the spine.
Herpes simplex-2 (HSV-2) causes
A. infection in neonates that have contact with lesions in the birth canal. B. genital lesions. C. intensely sensitive vesicles on or near the genitals. D. symptoms that include urethritis, cervicitis, and itching. E. All of the choices are correct.