What advanced trait do reptiles have that allowed them to venture onto dryer terrain than most amphibians?
Answer: An amniotic egg shell
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Suppose researchers marked 800 turtles and later were able to trap a total of 300 individuals in that population, of which 150 were marked. What is the estimate for total population size?
A) 200 B) 1050 C) 1600 D) 2100
In mammals, which excretory tubule segment allows water to exit but does NOT allow ions or urea to exit?
a. the ascending segment of the loop of Henle b. the distal convoluted tubule c. the proximal convoluted tubule d. the descending segment of the loop of Henle
In the lac operon, the protein that binds to the operator to prevent transcription is
the repressor. RNA polymerase. DNA polymerase. the promoter. lactose.
What method does a human white blood cell employ to engulf a bacterial cell?
a. osmosis b. exocytosis c. pinocytosis d. phagocytosis e. facilitated diffusion