Which level of taxonomy encompasses all of the others?
a. family
b. class
c. order
d. species
e. genus
ANSWER: b
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You investigated the cytoskeleton and found that all three elements, including the one you suspected, are completely normal. You then decide to look at the motor proteins to see if the cause of the abnormality might lie with one of them. Which one of the following would be your hypothesis?
a. The melanophores in these tadpoles have partially functional or nonfunctional kinesin that would normally transport organelles along microfilaments to the center of the cell. b. The melanophores in these tadpoles have partially functional or nonfunctional dynein that would normally transport organelles along microtubules to the center of the cell. c. The melanophores in these tadpoles have partially functional or nonfunctional dynein that would normally transport organelles along microfilaments to the center of the cell. d. The melanophores in these tadpoles have partially functional or nonfunctional kinesin that would normally transport organelles along microtubules to the center of the cell. e. The melanophores in these tadpoles have partially functional or nonfunctional myosin that would normally transport organelles along microfilaments to the center of the cell.
Which structure regulates the movement of food into the stomach, and which regulates the passage of food into the small intestine?
a. pyloric sphincter; anal sphincter b. gastroesophageal sphincter; pyloric sphincter c. epiglottis; pyloric sphincter d. epiglottis; gastroesophageal sphincter
In snapdragons, there is an allele for flower color, CW, that produces no pigment. A plant with the genotype CWCW will produce _____________ flowers.
a) no b) red c) white d) black e) pink
Heart cells in the embryo will be derived from which germ layer?
A) mesoderm B) ectoderm C) endoderm D) none of the above