Unit - 5

Question 1

Define abiotic.

Answer 1

Not derived from living things; physical rather than biological.

Question 2

Define biotic.

Answer 2

Of, realated to, or resulting from living things, especially in their ecological relations.

Question 3

Define producer.

Answer 3

An autotrophic organism that serves as a source of food for other organisms.

Question 4

Define consumer.

Answer 4

An organism that recieves energy by consuming other organisms.

Question 5

Define herbivore.

Answer 5

An organism that consumes plants for energy.

Question 6

Define carnivore.

Answer 6

An organism that eats flesh.

Question 7

Define omnivore.

Answer 7

An organism that eats both plants and flesh.

Question 8

What is biodiversity.

Answer 8

It is the variety of life in the world, or a specific ecosystem or habitat.

Question 9

What is ecology.

Answer 9

The branch of biology that deals with the realations of organisms to one another and their surroundings.

Question 10

What is a habitat.

Answer 10

The natural enviroment or home of an organism.

Question 11

What is the energy pyramid?

Answer 11

Its the graphical model of energy flow in a community, starting at a producer and working its way up to a third order consumer.

Question 12

What is an ecosystem?

Answer 12

Its all the life and things that cam effect life in a defined area.

Question 13

What is the food web?

Answer 13

Its a system of interlocking and interdependent food chains.

Question 14

What is a food chain?

Answer 14

Its a hierarchical series of organisms each dependent on the next as a source of food.

Question 15

What is a decomposer?

Answer 15

An organism that decomposes organic material.

Question 16

What is symbiosis?

Answer 16

This is a long term relationship between organisms.

Question 17

What is parasitism?

Answer 17

A relationship between two organisms where one is benefited, and the other is harmed.

Question 18

What is commensalism?

Answer 18

This is a relationship between organisms where one organism is benefitted and the other is not effected.

Question 19

What is mutualism?

Answer 19

This is a relationship between organisms, wherein both parties are benefitted.

Question 20

What is reproduction?

Answer 20

It is the action of a species multiplying and creating new organisms that are like or similar to each other.

Question 21

What is immigration.

Answer 21

It is the action of moving into another area, either by yourself or as a species.

Question 22

What is emigration?

Answer 22

It is the action of moving out of a previous location inhabited by the orgabism/species that is moving out.

Question 23

What is primary succession?

Answer 23

It is a process where life starts out on a newly created surface, such as an island from a lava flow, from a volcano.

Question 24

What is secondary succession?

Answer 24

It is when life starts out in an environment that has been there but was destroyed down to the soil, such as a forest fire.

Question 25

Define population.

Answer 25

This is the number of members in a species in a given area.

Question 26

What is the density dependent factor?

Answer 26

It is the factor that is largely manipulated by a population's density (such as a disease, which would spread quicker in a heavily populated enviroment).

Question 27

What is the density independent factor?

Answer 27

It is a factor that usually will do more damage in a heavily populated area, but the event will come to pass regardless of how high or low a population density is, such as a volcano eruption or a hurricane.

Question 28

What is emigration?

Answer 28

It is the process of one or more members of a species leaving their last "place of residence" for any given reason, whether it was lack of resources or too many predators.

Question 29

What is immigration?

Answer 29

It is the process of one or more members of a species going into a new "place of residence" after emigrating from a different location.

Question 30

Define stability.

Answer 30

It is the process of maintaining a constant regardless of the presence of forces which threaten to disturb it.

Question 31

What is the climax community?

Answer 31

An ecological community in the final stage of succession, in which the species composition remains relatively stable until a disturbance such as a fire occurs.

Question 32

What is the pioneer species?

Answer 32

It is the species that takes over (usually in primary or secondary sucession) and eventually leads to greater biodiversity.

Question 33

Define disturbance.

Answer 33

It is a variable or force that disrupts the integrity or stability of an ecosystem, community, spices, etc.

Question 34

Define inbreeding.

Answer 34

This is the act of breeding two races of the same species, or two different species together in an effort to control the creation of a new or different race of the same species.

Question 35

Define dispersion.

Answer 35

This is an event wherein a species spreads quickly over an area.

Question 36

Define life expectancy.

Answer 36

This the the average life span of a species.

Question 37

Define birth rate.

Answer 37

This the the rate in which new members of a species are born, within a given amount of time (usually annually).

Question 38

What is ecological sucession.

Answer 38

Ecological succession is the observed process of change in the species structure of an ecological community over time.

Question 39

Define growth rate.

Answer 39

This is the rate in which a a species grows within a given period of time.

Question 40

What is the agricultural revolution?

Answer 40

It is the period in which humans evolved to farming and forming plantations to more efficiently grow crops.

Question 41

What is the hunter gather lifestyle.

Answer 41

It is a lifestyle where you live off the land with no form of self sustainability. You hunt animals, and take edible plants nearby, then move to a different location.

Question 42

Define death rate.

Answer 42

This is the rate in which members of a species become deceased in a given period of time (usually annually).

Question 43

What is population density?

Answer 43

It is the number of member of a species within a limited given space.