Brainscape's Knowledge GenomeTM

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


See full index

NAT 5 Biology > Nat 5 - Unit 3 > Flashcards

Nat 5 - Unit 3 Flashcards

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

Food Chain

A

The sequence of what eats what in a community

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

Food Web

A

A network of interrelated food chains

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

Carnivore

A

An organism that eats animals

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

Herbivore

A

An organism that eats plants

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

Omnivore

A

An organism that eats plants and animals

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

Producer

A

Plants that produce chemical energy, through photosynthesis.
(to produce their own food)

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

Primary consumer

A

An organism which eats a producer

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

Secondary consumer

A

An organism which eats primary consumers

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

Tertiary Consumer

A

An organism which eats secondary consumers

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

Quaternary Consumer

A

An organism which eats tertiary consumers

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

Predetor

A

An organism which hunts its food

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

Prey

A

An organism which is hunted

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

Population

A

The number of organisms of the same species in an area

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

Community

A

The number of different species of organisms in an area

A group of interdependant organisms that contain different species

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

Ecosystem

A

All the organisms (community) living in a particular habitat and all the non-living components (abiotic factors) which affect them.

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

Abiotic

A

A Non-living factor that can affect organisms

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

Biotic

A

A living factor that can affect organisms

18
Q

Species

A

A group of similar species that can interbreed to produce fertile offspring

19
Q

Biodiversity

A

The variety of species in an area

20
Q

Interspecific competition

A

occurs when when members of different species compete for the same resources.

21
Q

Intraspecific competition

A

occurs when members of the same species compete for exactly the same resources

22
Q

Why is intraspecific competition more intense than interspecific competition?

A

Because in intraspecific competition because the competing organisms have identical needs

23
Q

What do animals compete for

A

food, shelter, territory, mates

24
Q

What do plants compete for

A

Light, water, nutrients, space to grow

25
Q

Consumers

A

Organisms which rely on eating other organisms for their food.

26
Q

Mutation

A

A random change to genetic material: the only source of new alleles.

27
Q

Natural Selection

A

The process by which those with favourable alleles (best adapted to the environment), survive and reproduce, passing on their genes.

28
Q

Evolution

A

A change in the inherited characteristics of a population which overtime through a process of natural selection. Which may result in the formation of a new species.

28
Q

What needs to be present in a population for evolution to occur

A

Variation within a population

28
Q

Mutations may be..

A

neutral, advantageous or disadvantageous (to survival)

29
Q

Types of isolating barriers

A

Ecological, geographical or behavioural

30
Q

Environmental factors which increase the rate of mutation

A

Radiation and some chemicals

31
Q

When does natural selection occur?

A

When there are selection pressures

32
Q

New alleles from mutations can result in..

A

Plants and animals becoming better adapted to their environment

33
Q

Natural Selection occurs when..

A
  1. More offspring are produced than the environment can sustain
  2. There are selection pressures
  3. Only the best adapted individuals survive to reproduce
  4. They pass on their favourable alleles that give the selective advantage
  5. These alleles increase in frequency in the population
34
Q

Speciation occurs when…

A
  1. Part of the population becomes isolated by an isolation barrier
  2. Different mutations occur in each subpopulation
  3. Natural selection selects for different mutations in each group
  4. Due to different selection pressures
  5. Each sub-population evolves until their genetic differences make them two different species.
35
Q

Show the sequence of antibiotic resistance in bacteria as an example of evolution

A

Mutation -> use of antibiotic -> natural selection

36
Q

What is Speciation?

A

The process by which two distinct species evolve from a single original species by natural selection

37
Q

Would the best organism within a species to survive and reproduce be:
a) the strongest?
b) the one which reproduces the fastest?
c) the best adapted to the environment?

A

c) the best adapted to the environment

38
Q

Why is variation important to the survival of a population?

A

Because it allows the population to adapt to changing environmental conditions.

NAT 5 Biology (1 decks)

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