TERMS/ DEFINITION

Question 1

What is eutrophication?

Answer 1

Eutrophication is the process of water bodies becoming overly enriched with nutrients, leading to excessive growth of algae and plankton.

Question 2

What is biomagnification?

Answer 2

Biomagnification is the process of accumulation of certain chemicals in living organisms to a concentration higher than that occurring in the inorganic environment.

Question 3

Define BOD.

Answer 3

Biochemical oxygen demand is the amount of oxygen required by microorganisms to break down the organic matter present in the waterbody.

Question 4

What is pesticide trade mill?

Answer 4

A pesticide treadmill is a situation in which the use of pesticides leads to the development of resistance in pests, which in turn requires the use of more and more pesticides.

Question 5

Chromatophores

Answer 5

Chromatophores are cells that produce color.

Question 6

Camouflage

Answer 6

Camouflage is a natural phenomenon used by plants and animals to blend into their environment.

Question 7

Sessile

Answer 7

An organism that is permanently attached to a surface and cannot move from place to place. Example: Sponges (Porifera)

Question 8

Sedentary

Answer 8

An organism that moves very little or remains fixed in one place for most of its life but is capable of limited movement.

Question 9

Diploblastic

Answer 9

Animals that develop from two germ layers: ectoderm and endoderm. Example: Cnidarians (jellyfish, hydra).

Question 10

Triploblastic

Answer 10

Animals that develop from three germ layers: ectoderm, mesoderm, and endoderm.

Question 11

Bilaterally Symmetrical

Answer 11

An organism that can be divided into two equal halves along only one plane (left and right sides are mirror images).

Question 12

Acoelomate

Answer 12

Animals that lack a body cavity (coelom) between the body wall and digestive tract. Example: Flatworms (Platyhelminthes).

Question 13

Pseudocoelom

Answer 13

A false coelom, where the body cavity is not entirely lined by mesoderm but still provides space for organs. Example: Roundworms (Nematoda).

Question 14

Circinate Vernation

Answer 14

The leaves, when young, remain coiled inwards, thus exhibiting circinate vernation

Question 15

Why is interphase called resting phase?

Answer 15

BECAUSE The cell grows, replicates its DNA, and prepares for mitosis.

Question 16

Why is mitosis called equational division?

Answer 16

BECAUSE The chromosome number in each daughter cell is equal to that in the parent cell.