weekly quiz 12

(LO 4.18) The major structural component of a plant is cellulose, which is a carbohydrate made of carbon, hydrogen and oxygen. The carbon in the cellulose in plants is from

carbon dioxide fixed by photosynthesis.

(LO 4.26) Invasive mussels, like Zebra mussels and Quagga mussels, have

redistributed phosphorous in Lake Michigan

(LO 4.21) If beetles eat plants, birds eat beetles, and bobcats eat the birds, then the birds are

secondary consumers

LO 4.21) In one ecosystem, leaf hoppers eat the alfalfa plants, frogs eat the leaf hoppers, and snakes eat the frogs. In this ecosystem, the frogs are

secondary consumers.

(LO 4.21) For this question, a secondary consumer needs 2,000 kcal per day, and gets all of its food from a single food chain. If this food chain supports exactly this one secondary consumer, how much biomass must the producers produce each day?

200,000 kcal

(LO 4.21) Which of the following organisms does NOT cycle carbon back into the air as carbon dioxide?

All of the organisms listed do cycle carbon back into the air as carbon dioxide.

(LO 4.18) Plants contain starches and cellulose. Starch and cellulose are polysaccharides (polymers of sugars). The carbon in starches comes from

Carbon Dioxide

(LO 4.26) Which of the following is a value, not a fact?

It is more important to be able to use phosphorous fertilizer, than to limit phosphorous entering the Great Lakes.

(LO 4.21) Compared to a secondary consumer, a primary consumer in the same food chain can gain

about ten times more of the energy of the producers

(LO 4.18) Plants contain starches and cellulose. Starch and cellulose are polysaccharides (polymers of sugars). The carbon in starches comes from

carbon dioxide

(LO 4.20) In an ecosystem, __________ usually cycle(s) within the ecosystem, and __________ usually flow(s) through the ecosystem.

chemicals, energy

(LO 4.19) Compared to a non-organic farm, which of the following would you be likely to find more of on an organic farm?

diverse crops grown together

(LO 4.19) Which of the following is NOT a concern for soil conservation?

energy flow through the ecosystem

(LO 4.20) In an ecosystem, it is most common for energy to _________the ecosystem, and for chemicals to _____________ the ecosystem.

flow through, cycle within

(LO 4.18) Which of the following is correctly matched to its main function?

flowers - reproduction

(LO 4.20) In ecosystems, chemicals usually cycle within the ecosystem, and energy usually

flows through the ecosystem.

(LO 4.19) Genetic engineering

has potential risks to health, like pharmaceutical treatments.

LO 4.19) Genetic engineering

has the potential to create cheaper medicines.

(LO 4.19) Genetic engineering

has the potential to reduce pesticide use.

(LO 4.26) Invasive mussels, like Zebra mussels and Quagga mussels, have

increased the amount of the benthic algae, Cladophora, in Lake Michigan.

(LO 4.25) Which of the following would increase Cladophora growth along the shores of the Great Lakes?

increasing the amount of phosphorous near the Cladophora

(LO 4.21) The average net productivity of open ocean and of desert and semidesert scrub are roughly equal to each other and are each about 100 g/m2/yr. The Earth has more open ocean than it has desert and semidesert scrub. From this information you would predict that

more of the Earth's net primary production is from open ocean, than from desert and semidesert scrub.

In the case study, we worked on in class which species competed with each other for light?

phytoplankton and benthic cladophora

(LO 4.21) A hawk eats mice that eat seeds from plants. In this example, the mice are

primary consumers

(LO 4.21) If beetles eat plants, birds eat beetles, and bobcats eat the birds, then the beetles are

primary consumers

(LO 4.20) Which of the following best describes the flow of energy through an ecosystem?

sunlight energy enters, is converted to chemical energy and is released as heat

(LO 4.21) When you are considering the contribution of a type of ecosystem to primary production you need to know

the average net primary productivity (g/m2/yr) and the size of that ecosystem.

(LO 4.25, 4.27) You want to know if an invasive species, Asian Carp, will increase the amount of light that gets to the benthic algae. The best measurement to make to test this hypothesis would be to measure

the depth of a Secchi disk reading above the algae

(LO 4.18) The major structural component of a plant is cellulose, which is a carbohydrate made of carbon, hydrogen and oxygen. The cellulose comes from

water mostly through the roots, and carbon dioxide from the air.