Answer the following statements true (T) or false (F)
1. In an open circulatory system, there is no difference between blood and interstitial fluid.
2. Relative to closed circulatory systems, Open Circulatory Systems pump hemolymph at relatively high pressure.
3. Blood is typically delivered to respiratory structures at low pressures in closed circulatory systems.
4. Frogs have two atria, but only a single ventricle.
1. TRUE
2. FALSE
3. TRUE
4. TRUE
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A scientist fused a mouse cell and a human cell, then treated the cell with specific antibodies covalently linked to
colored fluorescent dyes (antibodies to mouse proteins were labeled green; antibodies to human proteins were labeled red). Forty minutes later, what will the researcher observe?
a. The fused cell will still be half red and half green. b. The red and green fluorescent labels will be uniformly distributed throughout the entire membrane. c. The red and green labels will be distributed in intermingled patches. d. The red and green labels will flash intermittently. e. The red and green labels will be distributed in a swirling pattern.
How many genes are involved in determining
skin color? a. 1. b. 2. c. 10. d. 20. e. >100
The structure of DNA and RNA are similar in that
(A) both molecules are made of the same 5-carbon sugar (B) both molecules are composed of the same 4 nitrogenous base (C) the nucleotides of both molecules contain a phosphate group (D) both molecules are double stranded which are antiparallel in directionality
The exchange of gases between the lungs and the blood occurs by the process of
Select one: a. diffusion. b. osmosis. c. filtration. d. active transport. e. ionic bonding.