Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Env Bio > Population > Flashcards

Population Flashcards

1
Q

Endocrine disruptors: plasticizer

A

Phthalates

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

5 factors that decrease population

A

Limiting factors, disease/predators/competiton/food/disasters, carrying capacity, ecological resistance, species type (r vs. k)

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

Mark and Recapture formula: K stands for

A

Number of animals captured on 2nd visit

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

Mortality curve type that shows few early deaths and most deaths occur in old age

A

Type 1

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

Population Age Distribution: More older people than younger, decreasing birth rates (Japan), people enjoy single life

A

Upside down

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

Exponential Growth equation

A

G = rN

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

number of different species in a certain ecosystem

A

Species richness

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

Doubling Time equation:

A

70 / Growth Rate as percentage (not decimal)

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

Life History Pattern: Linear/logistic growth

A

equilibrium species

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

Method for determining population size used for mobile species

A

Mark/Recapture

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

Life History Pattern: mature and reproduce quickly

A

opportunistic species

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

Life History Pattern: mature slowly, reproduce later in life

A

equilibrium species

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

Equilibrium species are also known as this

A

k-strategists

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

4 factors that increase population

A

Age of maturity, reproductive lifespan, frequency of reproduction, survival rate

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

Community diversity formula

A

organisms in species / total # of organisms in population X 100

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

Population Age Distribution: Population has bulges and valleys, not the same amount of people in each age group

A

Constrictive

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

Both growth patterns start with _____ and then have _____ growth

A

lag; exponential

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

graph that shows how quickly individuals die in a species

A

Mortality curve

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

Method for determining population size that is most accurate, but seldom feasible

A

Direct Count

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

7 influences on human population growth

A

Migration rates, Fertility rates, Pop. Age Distribution, Hygiene, Medical advances, Ag improvements, Other tech improvements

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

the variety of different species present within an ecosystem

A

Community diversity

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

Life History Pattern: Very adaptable, favor unstable environments

A

opportunistic species

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

Mortality curve type where there are lots of death in early years but a few individuals live a long time

24
Q

Mortality curve type where deaths have the same likelihood in both young and old age

25
Mark and Recapture formula: N stands for
Number of animals in population
26
Endocrine disruptors: known as "forever chemicals", used because they resist grease, oil, water, and heat, used in non-stick cookware
PFAS
27
Endocrine disruptors: used in metal cans
BPA
28
Population Density formula
organism / area searched
29
Factor that can both increase and decrease carrying capacity
Changing climate and other environmental factors
30
Mark and Recapture formula: n stands for
Number of animals marked on first visit
31
Exponential Growth equation: r stands for
net reproduction per individual per unit time
32
Population distribution where members of the species are concentrated in separate groups
Clumped
33
Life History Pattern: population generally stable, well adapted for habitat
equilibrium species
34
Method for determining population size where you sample an area, then extrapolate
Transects
35
4 ways carrying capacity can decrease
Environmental degradation, depletion of non-renewable resources, extinction of bioresource, introduction of a new competitor
36
Growth pattern where population steadily increases and levels off at the carrying capacity
Linear/Logistic Growth
37
Exponential Growth equation: G stands for
population growth per unit time
38
natural and human caused variations impacting reproductive organs, hormones, and chromosomes (1.7% occurence in humans)
Intersex
39
opportunistic species are also known as this
r-strategists
40
Population Age Distribution: IDEAL, population stays the same, equal birth and death rates
(Near) Stationary
41
Population distribution where members of the species are spread evenly across the ecosystem
nearly uniform
42
Mark and Recapture formula
N = n (K/k)
43
Exponential Growth equation: N stands for
population size
44
Life History Pattern: Fewer offspring, more parental care
equilibrium species
45
Population Age Distribution: Pyramid-shaped. Seen in developing nations. High birth rates where people die relatively young due to lack of healthcare.
Expansive
46
Endocrine disruptors: oxidizer in fuel for rockets and missiles
Perchlorate
47
Growth pattern where the population grows at an accelerating rate, goes beyond the carrying capacity, and crashes back down
Exponential Growth
48
Life History Pattern: adapt slowly, favor stable environments
equilibrium species
49
Mark and Recapture formula: k stands for
Number of recaptured animals that were already marked
50
3 ways carrying capacity can increase
Tech advances, behavior, decrease in body size/resource demand
51
Life History Pattern: Competitors and Specialists
equilibrium species
52
Life History Pattern: exponential growth
opportunistic species
53
3 Assumptions about human population
Exceed Earth's carrying capacity and crash, meet it and remain stable, or keep rising / use tech to increase it
54
Life History Pattern: population crashes quickly, inhabit many environments
opportunistic species
55
Life History Pattern: generalists and colonizers
opportunistic species
56
Life History Pattern: many offspring, little parental care
opportunistic species
57
Population distribution where members of a species are dispersed in no distinct pattern
Random

Env Bio (13 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions