For the duration of meiosis I, each chromosome _____
A) is paired with a homologous chromosome
B) consists of two sister chromatids joined by a centromere
C) consists of a single strand of DNA
D) is joined with its homologous pair to form a synaptonemal complex
Answer: B
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The cycle of coral reef formation involves:
a. bioerosion. b. budding to form corallites. c. solidification of rubble by encrusting coralline algae. d. a followed by c
In lakes and ponds, the open-water zone extending to the depth of light penetration is referred to as the ________ zone
Fill in the blank(s) with correct word
Plague is a quarantinable disease
a. true b. false
Which of the following statements about siderophores is FALSE?
A) Siderophores are considered as bacterial virulence factors. B) Siderophores increase permeability of the outer membrane for G- bacteria. C) Siderophores bind iron and transport it into the bacteria. D) Siderophores compete for iron from host proteins transferrin and lactoferrin. E) none of the above.