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BIOL 121 Lecture Notes - Lecture 7: Nutrient, Basic Block, Limiting Factor

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27 May 2022

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BIOL 121 Full Course Notes

BIOL 121 Full Course Notes

Document Summary

Nutrients : chemicals needed for growth & maintenance of life ex . , fe nutrients get recycled - not like energy 1 comes from outside of earth) Nutrient cycles : can be described as terms of pools. Where nutrients are stored fluxes - movement in and out of pools input v5. output carbon : essential nutrient required for growth & reproduction. Basic building block of organic molecules carbon is stored in oceans & atmosphere /main reservoirs) also important pools : soil , living organisms , and fossil fuels carbon enters plants through capturing co2 during photosynthesisincorporated into organic molecules. 6 co2 + 6420 co hiz 06 + 602 ] not. _ testable light sugar cellular respiration carbon enters animals by being passed along food chain by consumers. Reservoirs carbon returns to the atmosphere by being released by living organisms during cellular respiration. Humans emit carbon-based greenhouse gases to the atmosphere through deforestation & fossil fuel use.

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Related Questions

Which of the following is NOT one of the uses of fungi?

Select one:

a. As a source of antibiotics.

b. To make drinks, like beer.

c. To produce fabrics like cotton and linen.

d. To make food, like bread.

e. As a direct food source: mushrooms, for example.

How do fungi get nutrients?

Select one:

a. They ingest organic material, break it down internally, and absorb the released nutrients through their digestive system.

b. Fungi use each of these methods to get nutrients.

c. They secrete enzymes that break down dead matter or living organisms and absorb the released nutrients.

d. They receive nutrients from other organisms that trade the nutrients for protection from pathogens.

e. They produce their own by photosynthesis.

Why is fungi's role as biodegraders so important to ecosystems?

Select one:

a. It transfers the energy from sunlight into sugars.

b. It provides nutrients and oxygen to the ecosystem.

c. It protects plants from harmful viruses and bacteria.

d. It keeps the level of prey animals down so they do not overwhelm the ecosystem.

e. It recycles and reuses organic molecules so they are not wasted.

Briefly describe the flow of energy through an ecosystem. How does the movement of energy differ from the movement of mineral nutrients?

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why do nutrients cycle within an ecosystem while energy flows

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