Adaptation

Q.

State two ways in which desert animals such as desert rats and desert snakes are adapted to survive in the hot deserts.

Q.

Why xerophytic plants do not have broad leaves?

Q.

How are some animals adapted to live in the desert?

Q. Viceroy butterfly resembles monarch butterfly. It is an example of

1. Alluring type aggressive mimicry
2. Concealing type aggressive mimicry
3. Warning type protective mimicry
4. Concealing type protective mimicry

Q. The statements given below have some parts printed in bold face. In case these parts are incorrect, rewrite these in correct form.
(a) All mammals are ectothermal

Q.

Question 12
Pteridophyta do not have

(a) root
(b) stem
(c) flowers
(d) leaves

Q.

The tendency of an organism to develop certain features which improve the chances of its survival in the environment it lives.

Q.

Fishes have ___ shaped body that helps them to move inside water.

Q.

Question 12
Pteridophyta do not have

(a) root
(b) stem
(c) flowers
(d) leaves

Q. A bird called _______hides its food.

1. Kingfisher
2. Parrot
3. Scrub jay
4. Crow

Q. Favourable morphological and physiological response to a change in environment is called

1. Preadaptation
2. Ecotyping
3. Formation of ecophenes
4. Acclimatisation

Q.

The favourable conditions that help an organism to survive in a particular environment.

Q. Large pectoral fins inserted dorsally and powerful tail occur in _________.

1. Remora
2. Anabas
3. Trygon
4. Exocoetus

Q. Mimicry is device for

1. Concealment from prey
2. Both A and B
3. Concealment from predator
4. Becoming conspicuous

Q. Choose the correct statements regarding biotic and abiotic components.​

1. Water, sunlight and carbon dioxide are necessary for plants to grow.​
2. A biotic community and its abiotic environment together form the basic functional unit of ecology called a biome.​
3. Ecologists use biotic and abiotic factors to predict population changes and ecological events.​

Q.

What are genes? Where are genes located?

Q. Which of the following is an important adaptation of animals to the cold climate?

1. Thin layer of body fat
2. Aestivation
3. Decreased tendency to shiver
4. Reduced surface area to volume ratio

Q. A polar bear can survive in polar regions because of padded feet and hump.

1. True
2. False

Q.

Fishes have ___ shaped body that helps them to move inside water.

Q. Animals have the innate ability to escape predation. Examples for the same are given below. Choose the incorrect example.

1. Melanism in moths
2. Colour change in chameleon
3. Poison fangs in snakes
4. Enlargement of body size by swallowing air in puffer fish.

Q. Have you noticed that during the cold season you cannot see any lizard In the house? Where do you think they have gone?

Q. Climbing perch is able to creep over land by means of

1. Pectoral fins
2. Opercular spines
3. Lobed fins
4. Both A and B

Q. Resemblance of an organism to another for protection and hiding is

1. Camouflage
2. Mimicry
3. Predation
4. Adaptation

Q. A bird called _______hides its food.

1. Kingfisher
2. Parrot
3. Scrub jay
4. Crow

Q. Match the following organisms with their adaptations.​
A.Camel I. Pneumatophores​
B.Whale II.Long eye lashes​
C.Mangroves III.Swim bladder​
D.Salmon fish IV.Blubber​

Q. A protective device in a community is

1. Mimicry
2. Competition
3. Commensalism
4. Parasitism
5. Symbiosis

Q. Mammals inhabit

1. polar ice caps and dark caves
2. all of these
3. forests and grasslands
4. deserts and mountains

Q.

We all know that fishes live under water. Recently it has been discovered that there is a new kind of fish which can also live for sometime on land. This fish is commonly known as Mudskipper (Periophthalmusbarbarus). This capability that has been attained by this fish is the result of __.