Life science p3

Question 1

System

Answer 1

a set of things working together as parts of a mechanism or an interconnecting network

Question 2

Feedback

Answer 2

information about reactions to a product, a person’s performance of a task, etc. which is used as a basis for improvement

Question 3

Model

Answer 3

a three-dimensional representation of a person or thing or of a proposed structure, typically on a smaller scale than the original

Question 4

Biosphere

Answer 4

the regions of the surface, atmosphere, and hydrosphere of the earth (or analogous parts of other planets) occupied by living organisms

Question 5

Ecosystem

Answer 5

a biological community of interacting organisms and their physical environment.

Question 6

Biome

Answer 6

a large naturally occurring community of flora and fauna occupying a major habitat, e.g. forest or tundra

Question 7

Organism

Answer 7

an individual animal, plant, or single-celled life form

Question 8

Population

Answer 8

all the inhabitants of a particular town, area, or country

Question 9

Biotic Factor

Answer 9

A biotic factor is any living thing that has an effect on an ecosystem.

Question 10

Abiotic Factor

Answer 10

a nonliving condition or thing, as climate or habitat, that influences or affects an ecosystem and the organisms in it

Question 11

Community

Answer 11

a group of people living in the same place or having a particular characteristic in common.

Question 12

Habitat

Answer 12

the natural home or environment of an animal, plant, or other organism

Question 13

Niche

Answer 13

a comfortable or suitable position in life or employment

Question 14

Biodiversity

Answer 14

the variety of life in the world or in a particular habitat or ecosystem.

Question 15

Keystone Species

Answer 15

a species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically

Question 16

exponential growth

Answer 16

when a population’s per capita growth rate stays the same, regardless of population size, making the population grow faster and faster as it gets larger.

Question 17

logistic growth

Answer 17

a population’s per capita growth rate gets smaller and smaller as population size approaches a maximum imposed by limited resources in the environment, known as the carrying capacity

Question 18

carrying capacity

Answer 18

the number or quantity of people or things that can be conveyed or held by a vehicle or container.

Question 19

density dependent

Answer 19

density-dependent factor, also called regulating factor, in ecology, any force that affects the size of a population of living things in response to the density of the population (the number of individuals per unit area)

Question 20

density independent

Answer 20

Density independent factors, in ecology, refer to any influences on a population’s birth or death rates, regardless of the population density.

Question 21

population density

Answer 21

The population density is the number of population per unit of total land area of a country.

Question 22

emigration

Answer 22

the act of leaving one’s own country to settle permanently in another; moving abroad

Question 23

disturbance

Answer 23

the interruption of a settled and peaceful condition.