You are studying chromosomal movement in a frog species whose haploid number is 3. What will you see in meiosis I prophase of this cell?
A) three chromosomes, each made up of sister chromatids (double-stranded)
B) six chromosomes, each made up of sister chromatids (double-stranded)
C) three chromosomes, each single-stranded (unduplicated)
Answer: C
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Which of the following is not true of the regulation of translation initiation in eukaryotes?
A. Repressors bind to the 3' untranslated region of mRNA. B. Repressors bind to initiation factors. C. Repressors bind to translational start sites of mRNA. D. Repressors bind to translational release factors.
Secondary phloem
A. includes live companion cells and dead sieve cells. B. encompasses more stem volume than secondary xylem. C. primarily stores carbohydrates. D. is part of the inner bark. E. is produced by the cork cambium.
Heterospory refers to having
a. male and female gametes. b. two spore types. c. both male and female parts on the same plant. d. separate male and female plants. e. both sporophyte and gametophyte generations.
A gelatinous fluid inside the chloroplast containing ribosomes, DNA, and enzymes is the
A. chlorophyll. B. mitochondrion. C. stroma. D. thylakoid. E. granum.