Biology - Unit 2...1

Front 1

Auxin

Back 1

A plant Hormone, that is produced in the tip of a coleoptile and causes growth of cells in the coleoptile

Front 2

Behaviours

Back 2

activities that animals perform in response to internal and external stimuli

Front 3

Circadian rhythm

Back 3

A circadian rhythm is an endogenously driven roughly 24-hour cycle in biochemical, physiological, or behavioural processes. Circadian rhythms have been widely observed, in plants, animals, fungi and cyanobacteria

Front 4

Competition

Back 4

Competition is a contest between individuals, groups, animals, etc. for territory, a niche, or a location of resources. It arises whenever two or more parties strive for a goal which cannot be shared. Competition occurs naturally between living organisms which co-exist in the same environment. For example, animals compete over water supplies, food, mates, and other biological resources.

Front 5

Demersal

Back 5

descrbes eggs that are laid in rock crevices also refers to spawners, that is, fis that produce eggs and sperm and guard the eggs after fertilisation

Front 6

Ethology

Back 6

study of animal behaviour

Front 7

Geotropism

Back 7

response of a shoot or root to gravity

Front 8

Habituation

Back 8

type of learned behaviour in which the response to a repeated stimulus gradually decreases

Front 9

Hormones

Back 9

in animals, chemicals are produced in endocrine glands, that are released into and transported via the bloodstream to other parts of the body which they act

Front 10

Immigration

Back 10

is the act of foreigners passing or coming into a country for the purpose of permanent residence. Immigration is made for many reasons, including economic, political, family re-unification, natural disaster, poverty or the wish to change one's surroundings voluntarily.

Front 11

Imprinting

Back 11

form of rapid and irreversible learning occuring during the early stage of an animal's life

Front 12

Monogamy

Back 12

situation in which animials form a pair bond and one male mates with one female for one or more breeding seasons or for life

Front 13

Pheromones

Back 13

chemicals secreted by some animals to communicate with other members of the species; chemical messengers

Front 14

Photoperiodism

Back 14

response of plants to particular periods of light and dark in terms of flowering or germination of seeds

Front 15

Phototropism

Back 15

movement of a plant in response to light

Front 16

Polyandry

Back 16

one kind of polygamy in which one female has multiple male partners during a breeding season

Front 17

Polygamy

Back 17

situation in which one male or one female has multiple partners during a breeding season

Front 18

Polygyny

Back 18

one kind of polygamy in which one male has multiple femals partners during a breeding season

Front 19

Releases

Back 19

when there is a stimulus and the hormones allow tghe chemicals to be released

Front 20

Thigmotropism

Back 20

a plant response to contact with a solid object