Which can result in Down syndrome? (Select all that apply.)

A) nondisjunction resulting in an extra chromosome 21
B) a reciprocal translocation between acrocentric chromosomes 14 and 21
C) deletions of a segment of chromosome 21
D) having the triploid number of chromosomes


A) nondisjunction resulting in an extra chromosome 21

B) a reciprocal translocation between acrocentric chromosomes 14 and 21

Biology & Microbiology

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a. jaegers. b. skimmers. c. puffins. d. penguins. e. herons.

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The pituitary gland is regulated most directly by the

a. pineal gland. b. hypothalamus. c. pancreas. d. adrenal gland. e. thyroid gland.

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The drier the air outside a leaf, the faster is water lost from the leaf through the stomata

Indicate whether the statement is true or false

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Which of the following are the final by-products of glucose oxidation during aerobic cell respiration?

ATP only heat only carbon dioxide and water only both ATP and heat only ATP, heat, carbon dioxide, and water

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