At what point during meiosis does the female gamete first become haploid?
A) the end of anaphase I
B) the end of meiosis II
C) the end of meiosis I
D) when crossing over is completed in prophase I
E) the end of telophase II
Answer: C) the end of meiosis I
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a. after a fire. b. on a new volcanic island. c. on bare rock. d. on land exposed as a glacier retreats. e. none of these
Which of these events occurred during the Paleozoic?
a. origin of Earth b. colonization of land by plants c. origin of eukaryotes d. origin of multicellularity e. first humans
Honeybees that feed on nectar are categorized as
a. producers. b. consumers. c. decomposers. d. photosynthetic
A reflex pathway is the simplest pathway because it _____
a. involves only one synapse b. is evaluated and integrated by the medulla, not the cerebrum c. does not involve conscious thought or learning d. does not involve the central nervous system in any way e. involves only one neurotransmitter