Specific cells of diploid sporophytes undergo meiosis to produce
A) haploid, single-celled spores.
B) haploid, single-celled gametes.
C) diploid, multicellular spores.
D) a diploid, single-celled zygote.
E) diploid, multicellular gametes.
A
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In a frog in which the diploid number of chromosomes per cell is 24, what is the total number of
chromatids present per cell in Prophase II after the first division and cytokinesis?
a. 0 b. 6 c. 12 d. 24 e. 48
Suppose a three-point testcross was conducted involving genes X, Y, and Z. If the most abundant classes of progeny are X Y z and x y Z and the rarest classes are x Y Z and X y z, which gene is in the middle?
A) X B) Y C) Z D) cannot be determined
__________ and __________ fluid are the main components of extracellular fluid. Fill in the blank(s) with the appropriate word(s)
The emerging and scientific consensus about "secondhand smoke" supports the conclusion that while airborne particles emitted by the lit end of cigarettes pose a health risk to those who are exposed, the gases released by a cigarette are relative
harmless. Indicate whether the statement is true or false