Draw a diagram that follows the effects of CO2 on climate and theinteractions between CO2 levels and phytoplankton.

Emergent vegetation grows in the __________ zone of freshwater lakes, (a) littoral (b) limnetic (c) profundal (d) neritic (e) intertidal

Figure 44.21 In which of the following regions would you expect to find photosynthetic organisms? the aphotic zone, the meritic zone, the oceanic zone, and the benthic realm the photic zone, the intertidal zone, the meritic zone, and the oceanic zone the photic zone, the abyssal zone, the meritic zone, and the oceanic zone the pelagic realm. the aphotic zone, the meritic zone, and the oceanic zone

Figure 20.12 Which of the following statements about the nitrogen cycle is false? a. Ammonification converts organic nitrogenous matter from living organisms into ammonium (NH4+) . b. Denitrification by bacteria converts nitrates (NO3) to nitrogen gas (N2) . c. Nitrification by bacteria converts nitrates (NO3) to nitrites (NO2) . d. Nitrogen fixing bacteria convert nitrogen gas (N2) into organic compounds.

Figure 44.12 Which of the following statements about biomes is false? Chaparral is dominated by shrubs. Savannas and temperate grasslands are dominated by grasses. Boreal forests are dominated by deciduous trees. Lichens are common in the arctic tundra.

Where would you expect to find the most photosynthesis in an ocean biome? a. aphotic zone b. abyssal zone c. benthic realm d. intertidal zone

Describe the greenhouse effect. Make a list of twenty agricultural and other products that you depend on. Are any implicated in global warming?

Which of the following biomes is characterized by short growing seasons? a. deserts b. tropical we forests c. Arctic tundra d. savanna

Which term describes the process whereby toxic substances increase along trophic levels of an ecosystem? a. biomassification b. biomagnification c. bioentropy d. heterotrophy

The _______________ is open ocean from the shoreline to a depth of 200 m. (a) benthic environment (b) intertidal zone (c) neritic province (d) oceanic province (e) aphotic region