Midterms 3

Question 1

Is a collection of organisms of a
particular species, sharing a particular
characteristics of interest, most often
that of living in a given area

Answer 1

Population

Question 2

Characteristics of Population

Answer 2

Size
Density
Distribution

Question 3

It pertains to the number of individuals in a
population. It may change when individuals
enter or leave the population.

Answer 3

Size

Question 4

Factors that affect the size of population

Answer 4

Emigration
Immigration
Natality
Mortality

Question 5

– number of species that leave the land

Answer 5

Emigration

Question 6

– number of species that entered the land

Answer 6

Immigration

Question 7

– number of species that are born

Answer 7

Natality

Question 8

– number of species that die

Answer 8

Mortality

Question 9

It is the number of the individuals of species living in a
particular area of that population.

Answer 9

Density

Question 10

tells how individuals are located in a particular area.
It is simply the arrangement or how organisms
belong in a population is organized within a
particular space.

Answer 10

Distribution

Question 11

Three ways that organisms can be distributed

Answer 11

Random Distribution
Uniform Distribution
Clumped Distribution

Question 12

The organisms are evenly
distributed over an area
Example: coconut plantation

Answer 12

Uniform Distribution

Question 13

There is no specific order; the organism
is spread throughout the area
without an overall pattern.
Example: Shrub

Answer 13

a.Random Distribution

Question 14

The organisms are
concentrated in an area. It may
offer the population protection
from enemies.
Example: school of fishes

Answer 14

clumped Distribution

Question 15

means the presence of diverse biological
forms as well as the ecosystem in which they live.

Answer 15

What is Biodiversity?

Question 16

LEVELS OF BIODIVERSITY

Answer 16

Species Diversity
Genetic Diversity
Ecosystem Diversity

Question 17

It refers to the variety of living organisms

Answer 17

SPECIES
DIVERSITY

Question 18

It refers to the variety of genetic
information contained in all the
individual plants, animals and
microorganism.

Answer 18

Genetic Diversity

Question 19

It refers to the variety of biotic communities,
habitats, and ecological processes as well as the
tremendous diversity present within ecosystem.

Answer 19

Ecosystem diversity

Question 20

There are 2 main threats to Biodiversity

Answer 20

1. Natural Biodiversity Loss
2. Human-driven biodiversity loss

Question 21

• seasonal changes
• natural ecological disturbance
  During warmer months plants
  begin to grow and produce food
  animals to eat.
  In summer the diversity and
  abundance of insect (e.g bees,
  butterflies) peak, supporting a
  higher diversity of insectivorous
  birds and small mammals.

Answer 21

Natural Biodiversity Loss

Question 22

They destroy ecosystem and
biodiversity

Answer 22

Human-driven biodiversity loss

Question 23

Other Threats to Biodiversity

Answer 23

1. Habitat loss
2. Invasive Alien Species
3. Pollution
4. Overexploitation/Overharvesting
5. Climate Change

Question 24

which is any thinning, fragmentation, or destruction of an
existing natural habitat—reduces or eliminates the food
resources and living space for most species

Answer 24

Habitat loss

Question 25

a. Janitor Fish are considered a threat
to the freshwater fish population;
they are found in the Marikina River
and Laguna de Bay. Due to
irresponsible disposal of janitor fish
by aquarium owners to the river.
(janitor fish originated from Brazil or
Peru)

Answer 25

Invasive Alien Species

Question 26

a. Janitor Fish are considered a threat
to the freshwater fish population;
they are found in the Marikina River
and Laguna de Bay. Due to
irresponsible disposal of janitor fish
by aquarium owners to the river.
(janitor fish originated from Brazil or
Peru)

Answer 26

Invasive Alien Species

Question 27

Ecosystems are impacted by air pollution,
particularly sulfur and nitrogen emissions,
and ground-level ozone as it affects their
ability to function and grow.

Answer 27

Pollution

Question 28

For instance, when overfishing of one species leads to a decline in
by-catch or drives the market to overexploit another, previously
unexploited, species

Answer 28

Overexploitation/Overharvesting

Question 29

For many species, temperature
serves as a cue for
reproduction. Clearly, changes
in sea temperature could affect
their successful breeding

Answer 29

Climate Change

Question 30

is a population of organisms which is
facing a high risk of becoming extinct because it is either few in
numbers, or threatened by changing environmental or
predation parameters

Answer 30

endangered species

Question 31

have restricted limited habitat

Answer 31

Extinct species

Question 32

refer to species or subspecies that are not
critically endangered or endangered but is under threat from adverse
factors throughout their range and is likely to move to the endangered
category in the near future

Answer 32

Vulnerable species

Question 33

refer to specie or subspecies
that are not critically endangered nor vulnerable but are under
threat from adverse factors such as over collection.

Answer 33

Other threatened species (OTS)

Question 34

MAJOR ENVIRONMENTAL ISSUES

Answer 34

◆ Pollution of Air, Water and Land
◆ Hazardous Chemicals and Wastes
◆ Land Degradation
◆ Loss of Biodiversity
◆ Ozone Depletion
◆ Climate Change
◆ Loss of natural and cultural
resources

Question 35

the emission of any impurity
into the air, such as smoke
(including tobacco smoke),
dust, cinders, solid particles,
gases, mists, fumes, odours
and radioactive substances.

Answer 35

AIR POLLUTION