The __________ gives rise to muscles, bones, and the circulatory system
a. endoderm
b. ectoderm
c. mesoderm
d. blastopore
e. mesoglea
C
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Why do heavy consumers of alcohol gain
weight?
a. alcohol contains an excessive amount of calories b. ethanol is converted directly to fat molecules c. oxygen is diverted from breaking down fatty acids to break down ethanol d. ethanol inhibits the action of peroxisomes which work to break down fatty acids e. the hydroxyl group on ethanol is transferred to fatty acids causing them to be stored as fat
Cell motility is an important identifying characteristic in laboratories. What is the best way to determine whether a bacterial strain is motile?
A) Do a simple stain and observe the organisms under phase-contrast microscopy. B) Do a Gram stain and observe the organisms under bright-field microscopy. C) Stab an inoculum into a tube of semisolid medium. D) Inoculate a liquid culture with the organism.
Which type of cell secretes antibodies into the blood?
A) Memory B) Cytotoxic T C) Helper T D) Plasma
Membrane synthesis in the cell requires the regulation of growth for both halves of the bilayer and the selective retention of certain types of lipids on one side or the other. Which group of enzymes accomplishes both of these tasks?
(a) flippases (b) phospholipases (c) convertases (d) glycosylases