BIOA02H3 Lecture Notes - Lecture 11: Kalahari Desert, Mustard Oil, Bracken

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3 Feb 2015

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From tree to seed: transport in plants, plant nutrition & soils, plant defense, plant life on the edge. All non-plants depend directly or indirectly on plant food. Every plant is under constant threat of attack (=herbivory: plants feed the world, but they do not really want to do so . Especially insects are feeding on plants day and night: plants feed the world, but they do not really want to do so . Leaf miners: plants feed the world, but they do not really want to do so . Mollusks: plants feed the world, but they do not really want to do so . Argentinosaurus: 40 m long, 100 tons, 90-100 million years ago: plants feed the world, but they do not really want to do so . Small mammals: plants feed the world, but they do not really want to do so . Large mammals: plants feed the world, but they do not really want to do so .

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Please write down your response after reading the paragraphs. (At least 5 sentences long, 150-200 words.)

Human innovation in a sense is technology already. Every single innovation made by human kind can be seen as an innovation. In my opinion there isn't really a line between technology and human innovation. Technology wouldnât exist without human innovation. Every single piece of technology is due to human innovation. Technology exist because humans want to make something more convenient or feel like that innovation would be useful in our society.

As humans continue to innovate, they tend to use more and more technology to do so. This is because this is the purpose of technology. Technology's purpose is to simply the life of human beings, making things more convenient for them. So, if humans want to continue innovating, eventually they will need to rely more and more technology because it will make innovating easier. Innovators can in a sense not depend on new technology, but this will make it hard to do simple task and continue research. Technology is the new and best thing someone can use, this is also true for innovating.

Please help! Also, explain answers if you can. Thanks!

If you examine plant life in a very arid place like deathvalley, you may find some herbaceous desert plants that do not have any anatomical features for water conservation. How would you expect this as someone who has studied botany?

A. they absorb moisture from the atmosphere during night

B. they can grow with very little available water.

C. they can exist and grow for long periods on stored water.

D. they complete life cycle within the short time there is sufficient moisture.

E. they use crassulacean acid metabolism pathway

Which of the following is a difference between a prairie grassland and a savanna grassland?

A. Prairie soils are rich in nutrients

B. Savannas have provided some of the most productive agricultural lands.

C. Prairies support an immense population of animals.

D. Savannas have scattered tall trees

Why are sclerophyllous shrubs the dominant forms of chaparral vegetation?

A. plants are too densely grown preventing the development of large leaves

B. because there are prolonged dry spells and extreme drought in the summer months.

C. large population of herbivores feed on softer leaves on other species

D. the elevation prevents other forms of plant life.

Bogs are areas with acidic soils in which carnivorous plants can often be found preying on insects. If insects are a good source of nitrogen, why don ?t more plants in all other ecosystems adopt carnivorous habits?

A. plants in other habitats obtain nitrogen from bacteria in their root nodules.
B. insects in other habitats do not contain as much nitrogen.
C. insects are more mobile and hard to catch in non-swampy areas.
D. it is more energy efficient to absorb nitrogen from soils that are not deficient of nitrogen

The process of carbon fixation has been an area of enhanced interest and research in the last decade or so

A. Why is that? Elaborate

B. For C3 plants, provide the following: a summary equation for each of the three stages of the Calvin cycle and then one summary equation for the entire process of the cycle.

C. What is the inefficiency that is inherent in the first stage of rthe Calvin cycle, due to an issue associated with the enzyme rubisco? Explain

D. C4 and CAM plants do not have the inefficnecy. Why not? How do they avoid the inefficiency? Explain?

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BIOA02H3 Lecture Notes - Lecture 11: Kalahari Desert, Mustard Oil, Bracken

BIOA02H3 Full Course Notes

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