Which statement relates to secondary growth in plants?
A) Monocots can undergo true secondary growth to increase the width of their stems.
B) Cork, cork cambium, and vascular cambium make up the bark of a woody plant.
C) Xylem cells make up the wood of a tree, whereas phloem cells are located in the bark of a tree.
D) True secondary growth in coconut palm trees makes them woody yet incredibly flexible.
C
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Which statement about the macronucleus and the micronucleus of ciliates is correct?
A. The macronucleus is diploid and the micronucleus is haploid. B. The macronucleus forms by the fusion of micronuclei from two different mating types. C. The micronucleus is formed by fission of the macronucleus. D. The micronucleus transmits genetic information through mitosis and meiosis, while the macronucleus maintains routine cellular functions.
When copies of a gene are found at different locations on the same or different chromosomes, the phenomenon is
called _____.
a. dispersed duplication b. dispersed localization c. duplicate localization d. gene dispersion e. random dispersion
Plasmids
A. are essential for survival. B. are found in all bacteria. C. often carry genes controlling pathogenicity. D. are located in microcompartments. E. cannot be passed between organisms.
An example of an autoimmune disorder is
A) hay fever. B) severe combined immune deficiency. C) systemic lupus erythematosus. D) colon cancer.