Cichlid fish from Lake Apoyeque, Nicaragua, have begun to develop distinct morphologies that allow them to eat different foods within the same lake. If these fish never fully speciate but continue to produce fit hybrids over a long period of time, what will be the result?
a. reinforcement
b. fusion
c. stability
d. inviability
c. stability
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A triploid cell contains sets of three homologous chromosomes. If a cell of a usually diploid species with 42 chromosomes per cell is triploid, this cell would be expected to have which of the following?
A) 63 chromosomes in pairs B) 63 chromosomes in 21 sets of 3 C) 63 chromosomes, each with three chromatids D) 21 chromosome pairs and 21 unique chromosomes
Chloride ions move by ________, following the transport of sodium out of the proximal tubule
Fill in the blank(s) with correct word
The _________ membranes stack up to form the ________ of the chloroplast.
A. cristae, grana B. thylakoids, grana C. ER, thylakoids D. Golgi, ER
Telomeres are necessary because:
a. RNA needs a DNA template. b. Okazaki fragments need a binding region. c. prokaryotic genomes are circular. d. DNA polymerase only works 5' -> 3'. e. chromosomes would grow during each replication.