When performing the quadrant streak plate technique for isolation, which quadrant has the highest density of bacteria?
A) 1
B) 2
C) 4
D) 3
A) 1
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A protein is destined to be secreted from a cell. In which organelle would you expect to find the protein just after it is produced in the rough endoplasmic reticulum?
A) endosome B) lysosome C) secretory vesicle D) Golgi apparatus E) nucleus
HCG targets which reproductive structure?
a. corpus luteum b. placenta c. uterus d. ovary e. blastocyst
The type of movement that is specific and requires carrier molecules and energy is
A. active transport. B. exocytosis. C. facilitated diffusion. D. osmosis. E. endocytosis.
At the start of a study, 200 spotted owls lived in an old-growth forest patch in western Oregon. During the next year, a biologist tracking the birds observed that 25 new birds hatched and 5 died. What was the growth rate (r) for this year?
A) 25 B) 5 C) 20 D) 0.1 E) 200