LE1

Question 1

It is the scientific study of the relations that living organisms have with respect to each other and their natural/physical environment

Answer 1

Ecology

Question 2

It refers to the specific
kind of place where an organism normally
lives

Answer 2

Habitat

Question 3

It refers to the “occupation” of an
organism in an ecosystem in order to
survive

Answer 3

Niche

Question 4

It consists of all the organisms
living in a particular area, as well as all the nonliving,
physical components of the environment
with which the organisms interact such as air, soil,
water and sunlight (climate)

Answer 4

Ecosystem

Question 5

It is a large geographical area
characterized by certain types of plants and
animals

Answer 5

Biome

Question 6

It is defined by the complex
interactions of plants and animals with the
climate, geology (rock formations), soil types,
water resources, and latitude of an area.

Answer 6

Biome

Question 7

What are the 3 major classifications of ecosystem?

Answer 7

Marine Ecosystem
Terrestrial Ecosystem
Freshwater Ecosystem

Question 8

It is a process used by plants and other organisms to convert light energy, normally from the Sun, into chemical energy that can be later released to fuel the organisms’ activities.

Answer 8

Photosynthesis

Question 9

Give the 3 main groups in the Energy Flow in Ecosystems

Answer 9

1. ) Plants: Producers of high energy molecules
2. ) Animals: Consusmers of high energy molecules
3. ) Other organisms: Decomposer

Question 10

This kind of bacteria requires molecular oxygen in their metabolic activity to produce nutrients

Answer 10

Aerobic bacteria

Question 11

This kind of bacteria does not require oxygen

Answer 11

Anaerobic bacteria

Question 12

This kind of bacteria uses oxygen when available but uses anaerobic reaction otherwise

Answer 12

Facultative bacteria

Question 13

What is the sequence of the food chain?

Answer 13

From sunlight to producers to primary consumers to secondary consumers to decomposers

Question 14

It is a more ecologically correct way of depicting energy transfer in the ecosystem
It also shows the importance of
balance and biodiversity

Answer 14

Food web

Question 15

As materials are cycled over and over, toxins
build up. Concentrations of toxins increase
along food chains, since a predator eats many
prey with the toxin.
What do you call this kind of process?

Answer 15

Biomagnification

Question 16

It often refers to the process whereby certain substances such as pesticides or heavy metals move up the food chain, work their way into rivers or lakes, and are eaten by aquatic organisms such as fish, which in turn are eaten by large birds, animals or humans. The substances become concentrated in tissues or internal organs as they move up the chain.

Answer 16

Biomagnification

Question 17

It is the totality of genes,

species, and ecosystems in a region

Answer 17

Biodiversity

Question 18

What are the 3 divisions/levels of biodiversity?

Answer 18

Genetic, Species, Ecosystems

Question 19

This diversity refers to the variation of genes
within species. This covers distinct populations of
the same species (such as the thousands of
traditional rice varieties in India)

Answer 19

Genetic diversity

Question 20

This diversity refers to the variety of species within a region.
Such diversity can be measured in many
ways, and scientists have not settled on a
single best method.

Answer 20

Species diversity

Question 21

What are the 6 relationships between species?

Answer 21

Parasitism, Commensalism, Mutualism, Predation, Competition, Saprophytism

Question 22

It is a class of relationships between two organisms where one organism benefits from the other without affecting it.

Answer 22

Commensalism

Question 23

It is the way two organisms of different species exist in a relationship in which each individual benefits from the activity of the other. Similar interactions within a species are known as co-operation.

Answer 23

Mutualism

Question 24

It is a non-mutual symbiotic relationship between species, where one species benefits at the expense of the other.

Answer 24

Parasitism

Question 25

It is a biological interaction where a predator (an organism that is hunting) feeds on its prey (the organism that is attacked).

Answer 25

Predation

Question 26

It is an interaction between organisms or species, in which the fitness of one is lowered by the presence of another.

Answer 26

Competition

Question 27

It isthe ability of certain plants to live in dead or decaying organic matter

Answer 27

Saprophytism

Question 28

It is the association between organisms of two different species in which one is inhibited or destroyed and the other is unaffected.

Answer 28

Amensalism

Question 29

is the introduction of contaminants into the natural environment that cause adverse change (in its composition and use).

Answer 29

Pollution

Question 30

Give 6 kinds of pollutions

Answer 30

Air, Water, Land, Noise, Thermal, Radiation

Question 31

unnatural presence of particles, substances such as poison or hazardous material

Answer 31

contaminants

Question 32

(chiefly of environmental pollution and pollutants) originating in human activity.

Answer 32

Anthropogenic

Question 33

page 12

Answer 33

of ppt 2