BIOC50H3 Lecture 4: Lecture 4-biob50.docx

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blackwildebeest308

27 Apr 2012

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Primary producers only give about 1% of their energy to others. There"s less and less energy as you go up the chain (10000-100-10) Photosynthesis: organisms convert solar energy into chemical energy, they take up co2 and synthesize compounds. Measure the amount of carbon in order to measure the energy in organisms: gpp: it depends on climate and lai (what area of ground is covered by leaves) Higher temperature: large npp (and much lower in deserts) It"s hard to detect for belowground (lifecycle is short and hard to measure- so people use tubes with a camera into the soil and get a sense of how many roots are there and the amount of biomass) Measuring: just take a tape and measure them (but if it is large place, you measure chlorophyll concentrations) or you use ndvi (difference between visible light and near- infrared)

Related Questions

What is the role of fungus in the food web shown?

◯ A. To gather green light in order to carry out photosynthesis.

◯ B. To break down organic matter into carbon dioxide and water.

◯ C. To convert light energy into chemical energy organisms can use.

◯ D. To break down food molecules in the absence of oxygen.

ceruleandolphin765

11. As energy flows through the food web in an ecosystem, the amount of energy that is transferred from one trophic level to the next trophic level increases. stays the same. decreases. may increase or decrease, depending upon the system.

12. Autotrophs are organisms that obtain energy by breaking down tissues of organisms that have died. harness external energy sources to produce complex chemical compounds. depend directly on primary producers for their energy and nutrients. eat other autotrophs to obtain energy.

13. Which of the following gives the correct order for energy flow through an ecosystem? primary producers â secondary producers â tertiary producers primary consumers â primary producers â secondary producers secondary consumers â primary consumers â primary producers primary producers â primary consumers â secondary consumers

14. Which one of the following aspects of plant biology is not directly involved in maintaining an adequate supply of water for the entire plant? phloem roots xylem transpiration pull

15. Which structure(s) do most plants use to acquire the energy that they need for cellular processes? the roots the leaves the stem

1.The name of the process whereby a plant uses oxygen in light.

	transpiration
	translocation
	photophosphorylation
	photorespiration
	photosynthesis

2.Photon energy, captured by chlorophyll a, is transferred as chemical energy to

	carbon dioxide
	glucose
	other chlorophylls
	carotenoids
	a series of hydrogen acceptors

3.Photosynthesis is important to the planet because it releases

	both ATP and oxygen
	oxygen
	carbon dioxide
	NADH
	ATP

amaranthfrog191

BIOC50H3 Lecture 4: Lecture 4-biob50.docx

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