MODULE 3: Biological diversity Flashcards

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1
Q

ecosystems definitions

A

The foundations of the biosphere (living things)

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2
Q

abiotic factors

A

non living chemical and physical parts of the environment that affect living organisms and the functioning of ecosystems

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3
Q

what is buoyancy

A

buoyancy is the ability to float

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4
Q

what is viscosity

A

viscosity is the denseness, thickness

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5
Q

biotic factors

A

living influences on where an organism lives.

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6
Q

explain distribution and abundance

A

distribution (where) and abundance (how many) can be influenced by abiotic factors

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7
Q

what are ecological relationships

A

predator (an organism that is hunting) feeds on its prey (the organism that is attracted).

competition:
infraspecific - same species compete for limited resources
interspecific - different species compete for shard resources.

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8
Q

allepothay is

A

chemicals released into the soil by trees to keep other plants away

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9
Q

symbiotic relationships

A

Mutualism: both species benefit

Commensalism: one species benefit, the other is unaffected

Parasitism: one species benefits, the other is harmed

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10
Q

Ecological niche

A

the sum total of a species use of the biotic and abiotic resources in its environment

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11
Q

how to calculate Quadrants
Abundance

A

Count no. in each quadrant using grid references
Add up total
Average in one box
Multiply by area

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12
Q

how to calculate Percentage cover Abundance

A

estimate what percentage of the area enclosed by the quadrant is occupied by each species.

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13
Q

explain food webs

A

Energy flow
Arrowheads point towards the consumer (producers start at the bottom)

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14
Q

mammals

A

Monotremes
(prototheria) lay eggs

Marsupials
(metatheria) give birth to their primitive young and raise them in a pouch

Placental mammals
(eutheria) give birth to fully developed young

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15
Q
A
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