Biology in general facts need to know Flashcards

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1
Q

What is the term used which is the study of animal behaviour?

A

Ethology

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2
Q

What are 5 animal behaviour which indicate stress?

A

Stereotypy, misdirected behaviour, inhibited reproduction, poor parenting altered levels of activity such as low (apathy) to very high (hysteria).

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3
Q

What is net assimilation?

A

Net assimilation is the increase in mass due to photosynthesis minus the loss due to respiration. This can be measured by the increase in dry mass per unit leaf area.

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4
Q

What is the name for the total plant biomass

A

Biological yield.

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5
Q

What is the name for the mass of desired product in plants.

A

economic yield.

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6
Q

How is the harvest index calculated?

A

The harvest index is calculated by dividing the dry mass of the economic yield by the dry mass of the biological yield.

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7
Q

What is hybrid vigour?

A

Hybrid viogour means genetically and physically stronger F1 offspring with desirable characteristics from each parent.

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8
Q

What is the term given for the combination of chemical and biological controls for major pest problems?

A

Integrated pest management

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9
Q

Why are keystone species important?

A

the ecosystem would collapse without their services.

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10
Q

Genetic diversity

A

the genetic variation represented by the number and frequency of alleles in a population.

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11
Q

Species diversity

A

the number of different species in an ecosystem (species richness) and the relative abundance of each species; species diversity can be influenced by the negative impact of a dominant species.

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12
Q

Ecosystem diversity

A

the number of distinct ecosystems within an area.

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13
Q

What is the term given for the destruction of rainforests and the widespread or deserts caused by inappropriate farming methods as well as other human activities?

A

ecosystem degradation

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14
Q

Properties of invasive species 4

A
  • Spread rapidly
    -eliminate native species
  • Free of predators, parasites, pathogens
  • Invasive species may hybridise with native species
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15
Q

What is the independent variable

A

The Independent variable is the variable which has been chosen to change.

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16
Q

What is the dependent variable

A

The dependent variable is the factor measured to judge the effect of changing the independent variable.

17
Q

When are integrated metabolic pathways formed?

A

Integrated metabolic pathways are formed when catabolic and anabolic pathways become interdependent.

18
Q

Enzyme induction involves what three genes on bacterial DNA?

A

*Structural gene coding for enzyme.

*Operator gene which switches structural gene “on” and “off”

*Regulator gene which codes of repressor protein molecules.

19
Q

What is activation energy?

A

Activation energy is the minimum energy required for chemical molecules to react together within a cell. Enzymes are catalysts which lower activation energy and speed up the chemical reactions which are vital for life.

20
Q

What is induced fit?

A

Induced fit is when the shape of the active site changes slightly to accept an alternative substrate molecule.

21
Q

high infinity

A
22
Q

low infinity

A