Midterms 2

Question 1

Is a defined space in which
organisms interactions take
place between a community,
with all its complex
interrelationships and the
physical environment.

Answer 1

Ecosystem

Question 2

There are different types
how organisms that
interact in the ecosystem
such as

Answer 2

a) Predation
b) Competition and,
c) Symbiotic relationship

Question 3

describes an interaction where a
predator species kills and eats other
organisms, known as prey.

Answer 3

Predation

Question 4

Occurs when two or more organisms
of same or different species
compete to use the same limited
resources or basic needs

Answer 4

Competition

Question 5

is a close ecological relationship between the
individuals of two or more species.

Answer 5

Symbiosis

Question 6

is a close ecological relationship between the
individuals of two or more species.

Answer 6

Symbiosis

Question 7

Three categories of symbiotic relationship
are

Answer 7

Mutualism, commensalism,
parasitism, cooperation

Question 8

is a symbiotic relationship between two
organisms of different species in which one derives
some benefit while the other is unaffected.

Answer 8

Commensalism

Question 9

is an association between organisms of two different
species in which each member benefits.
In many mutualistic relationships, the relationship is obligatory; the
species cannot live without each other

Answer 9

Mutualism

Question 10

is a form of symbiosis in which one species benefits at the
expense of another species; similar to predation, but acts more
slowly than predators and may not always kill the host.

Answer 10

Parasitism

Question 11

Organisms have three major
roles of in ecosystems such as

Answer 11

a) Producers
b)Consumers and,
c) decomposers

Question 12

Autotrophic
Phototropic
Chemotropic

Answer 12

Producer

Question 13

organisms
that make their own food.

Answer 13

autotrophic

Question 14

organisms use
photosynthesis and contain
chlorophyll

Answer 14

Phototrophic

Question 15

organisms use chemicals
other than H20, such as H2
S

Answer 15

Chemotrophic

Question 16

are heterotrophic organisms that cannot make their own
food.
They consume organic matter to provide themselves with energy and
molecules necessary to build their own bodies

Answer 16

Consumers

Question 17

Primary consumers consist of:

Answer 17

Herbivores and carnivores

Question 18

feed on vegetation (producers)

Answer 18

Herbivores

Question 19

are animals that primarily eat other
animals

Answer 19

Carnivores

Question 20

➢ are predators that feed on primary consumers(herbivores) or
primary carnivores.
➢ They are typically found in the third trophic level of a food
chain.

Answer 20

Secondary carnivores

Question 21

➢ are predators at the top of the food chain that feed on
secondary carnivores.
➢ They occupy the fourth trophic level

Answer 21

Tertiary consumers

Question 22

feed on both producers and
consumers

Answer 22

Omnivores

Question 23

feed on CARRION (dead or injured
animal corpses) and dead plant biomass.

Answer 23

Scavengers

Question 24

are heterotrophs that recycle small, often microscopic bits of dead
organic matter into inorganic nutrients available for plants to take
up from the soil.

Answer 24

Decomposers

Question 25

also known as a trophic
pyramid or energy pyramid
it is a graphical
representation that shoes
the distribution of energy,
biomass or number of
organisms at different
trophic levels in an
ecosystem.

Answer 25

Ecological pyramid

Question 26

The Pyramid of Number
denotes the total number of
living individuals at various
trophic levels in an ecological
system. The producers are at
the base and top carnivores at
the topmost level in this
pyramid

Answer 26

Pyramid of Number

Question 27

.
The ecological pyramid that is made
by considering the amount of
biomass that is produced by the living
system of each trophic level is
represented by the pyramid of
biomass.
The pyramid that demonstrates the
total weight of every trophic level in a
specific food chain in an ecosystem is
the biomass pyramid.

Answer 27

Pyramid of Biomass

Question 28

The ecological pyramid which is
formed by determining the flow of
energy from one trophic level to
another is known as the pyramid of
energy.

Answer 28

Pyramid of Energy

Question 29

is a
series of organisms that
transfer food between
the trophic levels of an
ecosystem using only
one species at each
level…a simple chain.

Answer 29

A Food CHAIN

Question 30

more accurately show
the network of food
chains representing
the feeding
relationships among
organisms in an
ecosystem.

Answer 30

Food WEBS

Question 31

As energy flows through an ecosystem, it passes through several level known as

Answer 31

Trophic level