Biology Test

Front 1

abiotic factors

Back 1

abiotic factors are non living or physical components of an ecosystem eg. wind salinity oxygen

Front 2

biotic factors

Back 2

biotic factors are living factors eg. plants

Front 3

experiment control

Back 3

when an experiment is done to test one variable one experiment is done without any variable this is called the control.

Front 4

geotropisim

Back 4

The growth of the parts of plants with respect to the force of gravity roots will always grow downwards (away from sun) and the stem will always grow upwards (towards the sun)

Front 5

thigmotropisim

Back 5

The turning or bending of a plant or other organism in response to a touch stimulus. so it occurs when it touches something eg. a grape vine will curl around a wire

Front 6

phototropisim

Back 6

The orientation of a plant or other organism in response to light, either toward the source of light (positive phototropism) or away this occurs when there is light

Front 7

photoperiod

Back 7

the time in which organisims recieve light.

Front 8

plant flowering

Back 8

most plants react to elongatd periods of darkness over a number of months which cause them to flower in the spring

Front 9

tolerance range

Back 9

a range of somethin g an organisim can tolerate

Front 10

stuctural adaptations

Back 10

Adaptations that affect the appearance, shape, or arrangement of particular physical features. Includes adaptations such as mimicry and cryptic coloration.

Front 11

behavioural adaptations

Back 11

Adaptations which are associated with how organisms respond to their environment. They can be inherited or learnt

Front 12

physiological adaptations

Back 12

Adaptations which are associated with particular functions in organisms.

Front 13

plant adaptations reduce water loss

Back 13

sunken stomata
hairy leaves
few stomata
closed stomata at night
thick waxy cuticle

Front 14

animal adaptations to reduce waterloss

Back 14

camel hump
rabbits burrow

Front 15

auxins

Back 15

weaken cell wall fill with water turgid and make plant bend towards sunlight

Front 16

cytokinins

Back 16

in the presence of auxins cytokinins stimulates cell division as well as differentiation of new cells. stems and leaves grow with more cytokinins roots grow when more auxins

Front 17

gibberllins

Back 17

similar to auxins promote cell elongation,promotes growth of whole plant, flowering fruit enlargement seed germination cell division in some plants synthesised in flowers etc.

Front 18

absisic acids

Back 18

assists plants to liberate or avoid adverse conditions, drought,salinityand low temp by promoting drop,bud and seed dormancy and increasing froist rsistance

Front 19

ethelyne

Back 19

is a gas that is released by rippening fruit it stimulates the fruit to rippen by breaking down starch into its oils and sugars triggered by auxins and absisic acids.