Not everyone can travel to a remote area of the world to protect a rare habitat, but there are choices each of us can make each day to reduce habitat destruction and slow the rate of species extinction
What action could you take to reduce habitat destruction caused by the mining, drilling, and transport of fossil fuels? A) Eat lower on the food chain.
B) Only buy products that are sustainably harvested.
C) Carpool or use public transportation.
D) Keep the thermostat turned to warmer levels in winter and cooler levels in summer.
C
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Why does countercurrent exchange optimize gas exchange across some gills?
a. It sustains an optimal thermal environment for gas exchange. b. It optimizes perfusion to the respiratory surface. c. It sustains an optimal respiratory gas concentration gradient, allowing diffusion to occur across the entire respiratory surface. d. It optimizes delivery of the respiratory medium to the respiratory surface. e. It minimizes diffusional area.
Photophosphorylation during photosynthesis differs from oxidative phosphorylation during cellular respiration in that
A) it involves an electron transport chain. B) energy is stored in the form of a proton (H+) concentration difference. C) generation of ATP is driven by a flow of protons (H+) through ATP synthase. D) the final electron acceptor is NADP+ and not oxygen.
The aquatic ancestry of bryophytes is most clearly demonstrated by what character?
A. The use of flagellated motile sperm B. The production of a sporangium C. Mycorrhizal associations with fungi D. A nutritionally dependent sporophyte
+
A) Fimbriae B) Sex pili C) Periplasmic flagella (axial filaments) D) Cilia E) Flagella