Within the epidermis of leaves are ________, through which gases, such as carbon dioxide and oxygen, pass.
A. stomata
B. vessel elements
C. trichomes
D. root hairs
Answer: A
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If eight alleles exist in a population, what is the maximum number of copies a normal individual is expected to have?
A. 8 B. 5 C. 4 D. 3 E. 2
Which epidermal cell produces the pigments that lead to the coloration of the skin?
a. Collagen fibers b. Keratinocytes c. Melanocytes d. Stratified squamous epithelium e. Elastin fibers
Four of the five answers listed below are features of plasma membrane extensions. Select the
exception. a. amyloplast b. centriole c. microtubule d. basal body e. 9+2 array
The kinetochore serves which of the following functions?
a. Kinetochores anchor spindle fibers to the centrioles. b. Kinetochores are the site of DNA synthesis. c. Kinetochores regulate the length of the cell cycle. d. Kinetochores attach to microtubules during mitosis. e. Kinetochores are involved in cytokinesis