Brainscape's Knowledge GenomeTM

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


See full index

Science Tenth Grade - Mc. Weenie > Unit 3 - Biodiversity > Flashcards

Unit 3 - Biodiversity Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

What is biodiversity?

A

Biodiversity is the number of species in an ecosystem and the variety within those species.

The word can be understood in two parts: ‘bio’ meaning ‘life’ and ‘diversity’ meaning ‘variety’.

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

How do scientists measure biodiversity?

A

Scientists usually measure biodiversity by genetic, species, or ecosystem levels.

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

How does biodiversity vary?

A

Biodiversity varies greatly with location and habitat.

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

Where is biodiversity generally highest?

A

In general, biodiversity is highest at the equator and decreases as you get further from the equator.

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

Where would you find habitats with the lowest biodiversity?

A

At the north or south pole.

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

What is the current global extinction event called?

A

The Holocene extinction.

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

List two human-related reasons for the decrease in biodiversity.

A

Global climate warming and over harvesting.

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

Give one example of how a decrease in biodiversity could impact us.

A

Loss of food crops.

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

Give one way that we can increase biodiversity.

A

Growing more than one crop.

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

What is a trophic cascade?

A

An ecological process which starts at the top of the food chain and tumbles all the way down to the bottom.

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

What is Abiotic?

A

Non-living factors or influence on organisms, such as the amount of sunlight, temperatures, and strength and direction of winds.

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

What is a Biome?

A

A collection of ecosystems that are similar or related to each other in that the dominant form of plant life.

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

What is Biotic?

A

Factors caused by the presence and roles of other living things.

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

What is a Community?

A

The collection of all the populations of all the species in an ecosystem or habitat.

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

What is Ecology?

A

The study of how organisms interact with each other.

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

What is an Ecosystem?

A

In an area defined by an ecologist, the set of relationships between populations of species and between those populations and the abiotic factors in their environment.

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

What is an Ecotone?

A

A grey area between ecosystems where organisms from both ecosystems interact with each other, often containing greater biodiversity.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is a Population?

A

All of the members of the same species, living in the same ecosystem or habitat.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is a Species?

A

A group of organisms that can interbreed and produce fertile offspring.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Arrange the following in order of largest to smallest: Ecosystem, Population, Community, Species.

A
  1. Ecosystem
  2. Community
  3. Population
  4. Species
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What is a Food Chain?

A

A step-by-step sequence linking organisms that feed on each other, starting with a food source.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What is a Habitat?

A

The conditions required for the survival of a species.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What are Autotrophs?

A

Organisms that use energy and raw materials to make their own food, whether from photosynthesis or chemical synthesis.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What is a Heterotroph?

A

An organism that is incapable of making its own food and must feed on other organisms to gain energy.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What is a Food Web?

A

A pictorial representation of the feeding relationships among organisms in an ecosystem.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

What is a Herbivore?

A

Animals that eat mainly plants.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

What is an Omnivore?

A

Animals that eat both plants and animals.

28
Q

What is a Carnivore?

A

Animals that eat mainly animals.

29
Q

What is a Trophic Level

A

A way of categorizing biotic things based on how they gain their energy

30
Q

What is a Primary Consumer

A

An organism that relies on autotrophs/producers for energy; second in a trophic level

31
Q

What is a Secondary Consumer

A

An organisms that relies on primary consumers for energy; third on the trophic level

32
Q

What is a Tertiary Consumer

A

An organism that relies on heterotrophs for energy; fourth in a trophic level

33
Q

What is a producer

A

A autotroph that uses photosynthesis to make food from sunlight

34
Q

What is a consumer

A

A heterotroph that eats other species for food

35
Q

What is a decomposed

A

An organism that feeds on waste matter to produce nutrients for other species

36
Q

What is mortality?

A

Death rate

37
Q

What is natality?

A

Birth rate

38
Q

What is immigration?

A

Movement of new individuals into the population

39
Q

What is emigration?

A

Movement of current individuals outside the population

40
Q

What is an Open Population?

A

An Open Population is where animals can move in and out freely.

41
Q

What is the formula for Population growth rate in an Open Population?

A

Population growth rate = (natality + immigration) - (mortality + emigration)

42
Q

What is a Closed Population?

A

A Closed Population is where species remain within the area and cannot leave.

43
Q

What is the formula for Population growth rate in a Closed Population?

A

Population growth rate = (natality) - (mortality)

44
Q

What is biotic potential?

A

Biotic potential is the maximum number of species that could survive in the area given optimal conditions.

45
Q

What factors determine biotic potential?

A

Factors that determine biotic potential include birth potential, survival capacity, procreation, and length of reproductive age.

46
Q

What is birth potential?

A

Birth potential is the number of young per birth.

47
Q

Give an example of birth potential.

A

Whooping crane females will lay two eggs per year, and only one survives.

Example of birth potential.

48
Q

What is survival capacity?

A

Survival capacity is the percent of young that survive to reproduce.

49
Q

Give an example of survival capacity.

A

Sea turtle females lay 110 eggs, but only 1% reach adulthood.

Example of survival capacity.

50
Q

What is procreation?

A

Procreation is the number of births per year.

51
Q

Give an example of procreation.

A

Elk mate once a year while farm animals breed more than once a year.

Example of procreation.

52
Q

What is the length of reproductive age?

A

Length of reproductive age is the number of years an organism can reproduce.

53
Q

Give an example of length of reproductive age.

A

African elephants reproduce between the ages of 15 to 90 years.

Example of length of reproductive age.

54
Q

What is an detrivores

A

an animal which feeds on dead organic material, such as vultures, worms, maggots, and crabs

55
Q

What is the Law of Tolerance

A

The law of tolerance states that the success of a species is determined by the degree of deviation of a limiting factor from the rang of optimum for the species,

simple term; an organism’s survival depends on environmental factors being within its tolerance ranges.

56
Q

What is the Carrying Capacity

A

The carrying capacity is the greatest number of individuals that a space can support indefinitely without degrading the environment.

57
Q

What is a invasive species

A

A non-native species that have colonized a new area to appoint of damaging the surrounding environment

58
Q

What is a pest

A

An organism that people considered harmful or inconvenient in a particular situation.

59
Q

What is a pesticide

A

A chemical designed to kill pest

60
Q

What is bioamplification?

A

Starts at the bottom and builds to the top, Biodiversity in the lower part of the chain is limited the most

61
Q

What is the ideal pesticide

A

Selective pesticide; Don’t impact biodiversity and don’t kill necessary species.
Doesn’t get into the food chain or have negative side affects (no bio amplifications)
The pesticide should not be able to create a resistance pest
Should be cheap to produce and easy to use since more effective in large numbers

62
Q

What is extinct

A

A species that is no longer found anywhere on earth

63
Q

What is endangered

A

A species that is close to extinction in all parts of Canada or in significant large locations

64
Q

What is extirpated

A

Any species that is no longer exists in one part of Canada, but can be found in other parts.

65
Q

What is threatened

A

Any species that is likely to become endangered if factors that make it vulnerable are not revered

66
Q

What is vulernable

A

Any species that is at risk because of law or declining numbers at the fringe of it’s range or in some restricted area.

Science Tenth Grade - Mc. Weenie (3 decks)

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