Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Biology > chapter 3.1-3.3 test > Flashcards

chapter 3.1-3.3 test Flashcards

1
Q

why do ecologist ask questions about events and organisms that range in complexity from an individual to the biosphere

A

understand relationships with the biosphere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

species

A

group of organism so similar to one another that the can breed and produce fertile offspring

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

populations

A

a group of individuals that belong to the same species adn live in the same area

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

community

A

assemblages or different populations that live together in adefined area

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

ecosystem

A

collection of all the organisms that live in a particular place, together with their nonliving, or physical enviroment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

biome

A

a group of ecosystems that have the same climate and dominate communities

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what is the highest level of organization that ecologist study

A

entire bisphere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

3 basic approaches scientist us to conduct modern ecological research

A

observing, experiment, modeling

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

why might ecologist set up an artificial environment in a laboratory

A

intimate and manipulate conditions that organisms would encounter in the natural world

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

why are many ecological phenomena difficult to study

A

occur over a long period of time or on such large spatial scales

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

why do ecologist make models

A

gain insight into complex phenomena such as the effects of global warming on the ecosystem

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is the core of every organism’s inter reaction with the environment

A

need for energy to power life’s processess

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what source of energy do organisms use that dont use the suns energy

A

inorganic chemical compounds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

autotrophs

A

only plants, some algae, and certain bacteria can capture energy from the sunlight or chemicals and use that energy to produce food

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

why are autotrophs also called producers

A

they make their own food

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what do autotrophs do during photosynthesis

A

use light energy to power chemical reactions that convert carbon-dioxide and water into oxygen and energy rich carbhydrates such as sugars and starches

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what kind of autotroph is the main on land

A

plants

18
Q

what is the main kind of autotroph in upper layers of ocean

A

algae

19
Q

what is the main autotroph in tidal flats and salt marshes

A

photosynthetic

20
Q

what are chemosynthesis

A

organisms use chemical energy to produce carbohydrates

21
Q

heterotrophs are also called what

A

consumers

22
Q

detretress

A

plant and animal remains and other dead matter

23
Q

herbivore

A

animal that only eats plants ( cows, rabbits)

24
Q

carnivore

A

organism that only eats meat (snakes, dogs, owls)

25
Q

omnivore

A

organism that eats plants and animals (humans, bears, and crow)

26
Q

detritivore

A

heterotroph that feeds on dead matter (mites, earthworms, crabs, and snails)

27
Q

decomposers

A

breaks down organic matter (bacteria, fungi)

28
Q

how does energy flow through an ecosystem

A

it flows through an ecosystem in one direction from the sun and inorganic systems to autotrophs and then to varies heterotrophs

29
Q

food chain

A

a series of steps in which organisms transfer energy by eating and being eaten

30
Q

food web

A

networks of complex interactions formed by the feeding relationships among various organisms in any ecosystem

31
Q

what does a food web link together

A

all the food chains in the ecosystem

32
Q

what is a trophic level

A

one of the levels in a food chain or a food web

33
Q

in a food web, what organisms make up the first trophic level

A

producers

34
Q

what does a consumer in a food chain depend on for energy

A

producers that would be on a lower level

35
Q

what is an ecological pyramid

A

diagram that shows the relative amount of energy, contained with trophic level

36
Q

only what level is producers

A

1st

37
Q

what is a biomass

A

it is the total amount of living tissue within a trophic level

38
Q

what does a biomass pyramid represents

A

represents the amount of potential food in that level

39
Q

what does a pyramid of numbers show

A

number of organisms in each trophic level

40
Q

why can each trophic level support only about one tenth the amount of living tissue as the level below it

A

each trophic level harvest only .1% of energy from the level below it

41
Q

what is ecology

A

scientific stufy of interactions among and between organisms and their surroundings/ environment

Biology (28 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions