Unit 1 Chapter 29 Flashcards
(14 cards)
What is the ultimate source of energy on earth?
a. Glucose
b. Hydrogen
c. Natural gas
d. Sunlight
d
Which trophic level has the highest biological magnification?
a. Tertiary consumers
b. Primary producers
c. Secondary consumers
d. Primary consumers
a
The biomass found in the tropical rain forest is more than the biomass found in the tundra. This indicates that ________.
a. there are more consumers than producers in the rain forest
b. there are more consumers than producers in the tundra
c. the rain forest has a greater amount of primary productivity than the tundra
the tundra has a greater amount of primary productivity than the rain forest
c
In the food web shown, the arrows point to where the ________ flow(s).
a. energy
b. nutrients
c. sunlight
d. water
a
If a shark eats a fish that ate a zooplankton that ate some phytoplankton, what proportion of the original calories does the shark receive? a. All of them b. 1/10 c. 1/100 1/1,000
d
Why are carbon, nitrogen, and water considered macronutrients?
a. They are needed by organisms in large quantities.
b. They are needed by organisms in small quantities.
c. They have large reservoirs in the atmosphere.
They have small reservoirs in the atmosphere
a
Which human activities elevate carbon dioxide levels in the atmosphere?
a. The burning of fossil fuels decreases the amount of nitrogen in the atmosphere, and that doesn’t leave enough nutrients for plant photosynthesis.
b. The burning of fossil fuels increases carbon dioxide levels, and the destruction of the rain forests kills off the plants that take carbon dioxide out of the atmosphere.
c. The burning of fossil fuels decreases carbon dioxide levels, and this doesn’t allow for enough carbon dioxide for plant photosynthesis.
The burning of fossil fuels forms a cloud around the Earth’s atmosphere, blocking the sun’s rays from reaching photosynthesizing plants.
b
Nitrogen gas is returned to the atmosphere through \_\_\_\_\_\_\_\_. a. fertilization b. acidification c. nitrification denitrification
d
In general, which of the following nutrients does not contain phosphorus? a. ATP b. NADPH c. Nucleic acid Carbohydrates
d
Why is the hydrologic cycle important to living things?
a. Water kills off bacteria, keeping the amount of pathogenic bacteria from exceeding their carrying capacity.
b. Without water, organisms would be hydrated.
c. Water is necessary in the synthesis and breakdown of biological molecules.
It is essential to combine with carbon dioxide to produce glucose
c
Acid rain, or acid deposition, is detrimental to an ecosystem because it wipes out \_\_\_\_\_\_, adversely affecting the recycling of nutrients. a. primary consumers b. secondary consumers c. tertiary consumers decomposers
d
Acidic water soaks up toxic metals such as lead, mercury, and aluminum. Why will this have a greater effect on the higher trophic levels?
a. Organisms in the higher trophic levels soak up these toxins directly from the soil.
b. Organisms in the higher trophic levels receive more energy from these toxins.
c. Organisms in the higher trophic levels will change their distribution to a smaller range and be removed from the food web in many areas.
Toxic substances accumulate with increasing concentrations at higher trophic levels, a phenomenon called biological magnification
d
Oceans, the atmosphere, and fossil fuels are large reservoirs of \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_. a. nitrogen. b. oxygen. c. water. d. carbon. phosphorus
d
True or False: One of the basic principles of ecosystems is that energy moves through ecosystems in a continuous one-way flow and that nutrients cycle within the ecosystems.
a. True
False
a
