Chlorosis and animal body mass Flashcards

1
Q

What is chlorosis?

A

Leaves look pale or yellow because cells are not producing enough chlorophyll

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2
Q

What is the effect of chlorosis?

A

It reduces the plants ability to make food by photosynthesis

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3
Q

What are environmental factors that affect chlorosis?

A

Lack of light, mineral deficiencies and virus infections

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4
Q

What happens as a result of lack of light?

A

In the absence of light, plants turn off chlorophyll production to conserve resources and chlorosis only occur when plant gets no light

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5
Q

What is the effect of mineral deficiencies?

A

A lack of iron which is needed as a cofactor for enzymes that make chlorophyll or magnesium which is found inside chlorophyll

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6
Q

What is the effect of viruses?

A

The interfere with the metabolism of cells and infected tissue can yellow and not support chlorophyll synthesis

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7
Q

How is body mass a result of environmental factors?

A

Dramatic size variation

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8
Q

What is the main cause of body mass within animals?

A

Lifestyle

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9
Q

How is lifestyle the main cause of body mass in animal?

A

Food consumed - both quality and quantity and excercise undertaken

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10
Q

What is the genetic link to body mass in animals?

A

Some obesity is due to genes

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11
Q

What is etiolation?

A

Plants growing in the absence of light

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12
Q

What is etoilation?

A

An environmental form of variation

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13
Q

What type of factors cause chlorosis?

A

Environmental

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