Biology 2483A Lecture : Lecture 21

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orchidotter238

26 Dec 2011

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Play an important part in how available these nutrients come to the environment. Water gets into cracks and freezes causing it to crack more and break open. Plants growing through sidewalks huge pressure on rocks. As you weather the surface of a rock; strip the nutrients away. A fresh surface has a very high nutrient content acid works on the rock releasing the nutrients. Clay vs. sand negative charge son the surface; grab onto soluble nutrients going to retain more nutrients than sand. Limestone high in minerals; parent material is the raw material to be worked on to get the nutrients into the soil it must be present in the parent material. Tropical forests = old soils (not much glaciation) Lots of weathering so soils get nutrient poor. Mocroorganisms cant break down litter; use enzymes to break it down and release nutrients. Two forms of nutrients coming in from the atmosphere.

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.

Explain why you think some of your foods tested positive for more than one organic nutrient. Discuss the nutrients found in foods that come from plants and the nutrients in foods from animals. Which nutrients are more commonly found in these different types of foods? Which nutrients are often found together? Which food has the most nutrients?

ultramarinecoyote692

1. Where does most chemical breakdown of carbohydrates occur? A. The stomach B. The small intestine C. The large intestine D. The mouth

2. The pancreas produces

	A.	bicarbonate and enzymes.
	B.	bile and enzymes.
	C.	bicarbonate and bile.
	D.	pepsin and bile.

3. Bile participates in the digestion of ______. Its specific function is to ______.

	A.	proteins . . . break down proteins into short polypeptides
	B.	fats . . . emulsify fats
	C.	fats . . . break down fats into glycerol and fatty acids
	D.	starch . . . break down starch into maltose

4. After chemical breakdown in the small intestine, nutrients are absorbed across the intestinal wall. Where do the nutrients go from there?

	A.	Fats go into the bloodstream to the liver. Water soluble nutrients go into the lymphatic system.
	B.	All nutrients go into the bloodstream to the liver.
	C.	All nutrients go into the lymphatic system.
	D.	Water soluble nutrients go into the bloodstream to the liver. Fats go into the lymphatic system.

5. The enzyme pepsin is found in the ________ and functions to _______________.

	A.	small intestine . . . break down carbohydrates
	B.	stomach . . . partially break down proteins
	C.	mouth . . . partially break down proteins
	D.	stomach . . . break down carbohydrates

6. The major function of the colon in digestion is to

	A.	produce bile.
	B.	break down fats.
	C.	absorb most nutrients.
	D.	reclaim water.

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Biology 2483A Lecture : Lecture 21

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