What is the structure labeled as A in the accompanying figure?
a. germinating spore
b. gametangium of a plant
c. gametangium of an alga
d. megasporangium of an alga
e. megasporangium of a plant
c
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How does ATP release energy that can be used by living cells?
A. By adding more phosphate groups to itself B. By being exposed to body heat C. By breaking a bond within an ATP molecule D. By being exposed to sunlight
In Drosophila melanogaster there is a sex-linked gene for eye color that is found only on the X
chromosome. The allele for red eye color (Xw+) is dominant over the allele for white eye color (Xw). You examine a vial of 100 flies that are all offspring from a single genetic cross. You see only redeyed females present, but you see both red-eyed and white-eyed males present. The genotypes of the parents were
a. Xw+Xw+; Xw+Y. b. XwXw; Xw+Y. c. Xw+Xw; XwY. d. Xw+Xw; Xw+Y. e. XwXw; XwY.
You have a freshly prepared 0.1 M glucose solution. Each liter of this solution contains how many glucose molecules?
A) 6.02 × 1023 B) 3.01 × 1023 C) 6.02 × 1024 D) 6.02 × 1022
Which of the following statements correctly describes the behavior of a tetrad during anaphase I of meiosis?
A) It travels intact to one pole of the dividing cell. B) It splits into two pairs of sister chromatids, and one pair goes to each pole of the dividing cell. C) It splits into two pairs of homologous, nonsister chromatids, and one pair goes to each pole of the dividing cell. D) It splits into four chromosomes, which distribute in random pairs to the two poles of the dividing cell.