Transcription of ribosomal RNA is primarily the function of
A) primase.
B) RNA polymerase I.
C) RNA polymerase II.
D) RNA polymerase III.
E) mitochondrial RNA polymerase.
B) RNA polymerase I.
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Which of the following statements are true of xylem?
_____ It is found in all land plants. _____ It assists in conducting materials, such as water and minerals, throughout the plant. _____ It provides structural support to the plant. _____ It is found in the gametophyte generation, but not in the sporophyte. _____ It contains specialized cells known as tracheids.
The most accurate description of an organism with genotype AaBb is
A. homozygous dominant. B. heterozygous. C. heterozygous dominant. D. homozygous recessive. E. heterozygous recessive.
Which list is arranged from the smallest to the largest organization level?
a. tissue, organ, organ system b. tissue, organ system, organ c. organ system, organ, tissue d. organ system, tissue, organ e. organ, organ system, tissue
Andalusian chickens with the genotype CBCB are black, those with the genotype CBCW are gray. What is the relationship between the CB and the CW alleles?
A) CB is dominant to CW. B) CB is recessive to CW. C) CW is dominant to CB. D) The relationship is one of incomplete dominance. E) CB and CW are codominant.