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Terrestrial adaptations - class-VI

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The prickly pear cactus became unusually abundant after its introduction in Australia, because it _________________.

  1. had no co evolved herbivores

  2. formed new mycorrhizall association

  3. lost its thorns

  4. all of these


Correct Option: A
Explanation:

Co evolution is caused by the selection pressure that each of the two species exerts on the other since there has been no co-evolved herbivore with prickly cactus, it became abundant in Australia.

Stems are covered by waxy coating in order to prevent

  1. Loss of water

  2. Photosynthesis

  3. Loss of carbon dioxide

  4. None of these


Correct Option: A
Explanation:

Stems are covered by waxy coating in order to prevent the loss of water and helps in maintaining the water level in the plant under dry conditions.

The process of change by which an organism or species becomes better suited to its environment is known 

  1. Adaptation

  2. Migration

  3. Digestion

  4. None of these


Correct Option: A
Explanation:

The process of change by which an organism or species becomes better suited to its environment is known as adaptation.

The trees in mountain habitats usually have

  1. Cone shape

  2. Rectangle shape

  3. Oval shape

  4. Square shape


Correct Option: A
Explanation:

The trees in mountain habitats usually have cone shape having sloping branches. This shape makes the rainwater and snow to slide off easily.

Which feature would be most helpful to a plant in a desert?

  1. Small leaves

  2. Large seeds

  3. Small roots

  4. Smelly flowers


Correct Option: A
Explanation:
Option A is correct.
Small leaves will help as they can reduce water loss due to transpiration.

Stems are modified in cactus in order to perform

  1. Photosynthesis

  2. Digestion

  3. Excretion

  4. Respiration


Correct Option: A
Explanation:

Stems are modified in cactus in order to perform Photosynthesis. Stems are flattened and green having thick waxy coating over them and helps in performing photosynthesis as leaves are converted into spines.

Which of the following is found in the mountains?

  1. Pine tree

  2. Mango tree

  3. Neem tree

  4. All of the above


Correct Option: A
Explanation:

Pine tree is found in the mountains.

 Most desert plants have roots that go very deep into the soil for

  1. Loss of water

  2. Absorption of water

  3. Both A and B

  4. None of these


Correct Option: B
Explanation:
Most desert plants have roots that go very deep into the soil for the absorption of water.

Fir trees are found in

  1. Deserts

  2. Rivers

  3. Mountains

  4. Plains


Correct Option: C
Explanation:

Fir trees are found in mountains.

The leaves of Pine tree are 

  1. Needle shaped

  2. Broad shaped

  3. Long and flat

  4. None of these


Correct Option: A
Explanation:
Option A is correct
The leaves of the Pine tree are needle-shaped in order to retain more water and helps the tree to survive in winter.

Which of these are abiotic components?

  1. Air

  2. Water

  3. Soil

  4. Rocks

  5. All of the above


Correct Option: E
Explanation:
The non-living things such as rocks, soil, air, and water in the habitat constitute its abiotic components.

Which of these is a biotic component?

  1. Plant

  2. Dust

  3. Table

  4. Car


Correct Option: A
Explanation:

Plants is the biotic component.

What type of plants are found in deserts?

  1. Cactus

  2. Pines

  3. Fir trees

  4. Both B and C


Correct Option: A
Explanation:

Cactus are found in deserts as they are adapted to live in dry conditions.

Small changes that take place in the body of a single organism over short periods, to overcome small problems due to changes in the surroundings, are called

  1. Acclimatisation

  2. Adaptation

  3. Germination

  4. None of these


Correct Option: A
Explanation:

Small changes that take place in the body of a single organism over short periods, to overcome small problems due to changes in the surroundings, are called Acclimatisation.

The broad-leaved trees found on mountains shed their leaves before the onset of _______.

  1. Winter

  2. Summer

  3. Autumn

  4. Spring


Correct Option: A
Explanation:

The broad-leaved trees found on mountains shed their leaves before the onset of winter. This prevents such trees from losing water from their leaves.

The north-facing side of a hill in a mountainous region in the US tends to:

  1. Receive less sunlight during a year than the south-facing side

  2. Grow a variety of trees that are typically observed at higher elevation

  3. Be a better location for a ski run than the south-facing side

  4. All of the above


Correct Option: D

The mountain goat has strong _____ for running up the rocky slopes of mountains for grazing.

  1. Hooves

  2. Nails

  3. Scales

  4. Both B and C


Correct Option: A
Explanation:
The mountain goat has strong hooves for running up the rocky slopes of mountains for grazing.
The hard and rough feet of an animal are called hooves. 

Which one has evergreen vegetation and drought adapted animals

  1. Chapparal

  2. Savannah

  3. Tundra

  4. Deciduous forest


Correct Option: A

To stay away from the intense heat during the day, they stay in _____ deep in the sand.

  1. Burrows

  2. Water

  3. Grass

  4. None of these


Correct Option: A
Explanation:

To stay away from the intense heat during the day, they stay in burrows deep in the sand. These burrows stay cool in the day and hence protect these animals from hot weather.

 ______ have long hair to keep them warm in low temperature.

  1. Yak

  2. Fish

  3. Bird

  4. Rat


Correct Option: A
Explanation:

Yak have long hair to keep them warm in low temperature.

A waterless area of land covered with sand having no or little vegetation is called

  1. Desert

  2. River

  3. Grassland

  4. Forest


Correct Option: A
Explanation:

A waterless area of land covered with sand having no or little vegetation is called desert.

 Deer has _______ to hear movements of predators.

  1. Long ears

  2. Short ears

  3. Long nose

  4. None of these


Correct Option: A
Explanation:
 A deer needs to know about the presence of predators ( animals like lion that make it their prey ) in order to run away from them and not become their prey. It has long ears to hear movements of predators.

 Desert animals come out only during the _____ when it is cooler.

  1. Day

  2. Night

  3. Afternoon

  4. None of these


Correct Option: B
Explanation:

Desert animals come out only during the night when it is cooler.

The colour of Lion is ______ in order to hide in dry grasslands.

  1. Black

  2. Light brown

  3. Dark brown

  4. Green


Correct Option: B
Explanation:
A lion lives in a forest or grassland and is a strong animal that can hunt and kill animals like deer.
Lion's light brown color helps it to hide in dry grasslands when it hunts for prey (animals to eat).

The snow leopard has _______ on its body.

  1. Thick fur

  2. Thin fur

  3. Scales

  4. Rashes


Correct Option: A
Explanation:

The snow leopard has thick fur on its body. This fur protects them cold and keeps them warm.

Desert rats pass out a small amount of ______.

  1. Urine

  2. Oxygen

  3. Stool

  4. Sweat


Correct Option: A
Explanation:

Desert rats pass out a small amount of urine and hence conserve water in their body.

The snow leopard has a thick layer of ____ beneath its skin for insulation.

  1. Protein

  2. Vitamin

  3. Fat

  4. All of the above


Correct Option: C
Explanation:

The snow leopard has a thick layer of fat beneath its skin for insulation to protect it from cold.

In the given list. How many animal are Ammonotelic?
Aquatic insect, bony fish, frog, Birds, reptiles, spiders, marines bony fish, crocodiles

  1. Four

  2. Three

  3. Five

  4. Two


Correct Option: A

The Expansion of SPCA

  1. Society for the Protection of Common Animals

  2. Society for the Prevention of Cruelty to Animals

  3. Society for the Prohibition of Cruelty to Animals

  4. None


Correct Option: B

Without ozone layer all terrestrial animals will be

  1. extinct

  2. Vanished

  3. Dead

  4. Resurrected


Correct Option: B

What are examples of unsubsidized natural solar powered ecosystem?

  1. Machines

  2. Forests, Oceans and Grasslands

  3. Houses

  4. Industries


Correct Option: B
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