Starting with three cells, how many cells would result from three rounds of replication?
a. Six
b. Nine
c. Twelve
d. Twenty-four
e. Forty-eight
f. Cannot be determined
Answer: d. Twenty-four
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Which of these events happens first in nearly all seed germination?
A) The cotyledons appear above ground, turn green, and photosynthesize. B) The radicle emerges from the seed, which permits the uptake of water and nutrients from the soil. C) The hypocotyl elongates to lift cotyledons above ground. D) Lateral roots develop and expand into surrounding soil.
Which motor protein would you find in a flagellum?
A. myosin B. dynein C. kinesin D. Answers a and b are both correct.
The type of epithelial cell found in the lining of some
airways and parts of the gut? a. simple cuboidal. b. simple squamous. c. simple columnar. d. stratified. e. stratified columnar.
Which procedure is the least-invasive method of assessing fetal health while development is still occurring?
A. amniocentesis B. chorionic villus sampling C. karyotyping D. ultrasound