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08. Adaptation

Fill in the Blanks

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Chapter: 08. Adaptation

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Fill in the blanks

The place where an organism, i.e., plant or animal lives is called its _ _ _ _ _ _ _ _ _ _ _ _ _ _.

habitat

_ _ _ _ _ _ _ _ _ _ _ _ _ _ and _ _ _ _ _ _ _ _ _ _ _ _ _ _ are physical components of a habitat.

Air, water (or temperature, light, soil, rock)

Aquatic habitats are divided into freshwater habitats like rivers and ponds, and _ _ _ _ _ _ _ _ _ _ _ _ _ _ habitats like seas and oceans.

marine

Plants living in water or aquatic habitat are called _ _ _ _ _ _ _ _ _ _ _ _ _ _.

hydrophytes

Plants that need a moderate amount of water are called _ _ _ _ _ _ _ _ _ _ _ _ _ _.

mesophytes

Plants growing in desert are called _ _ _ _ _ _ _ _ _ _ _ _ _ _.

xerophytes

The process of change or adjustment by which an organism becomes better suited to its environment is called _ _ _ _ _ _ _ _ _ _ _ _ _ _.

adaptation

_ _ _ _ _ _ _ _ _ _ _ _ _ _ was an English naturalist, geologist and biologist famous for his Theory of Evolution by Natural Selection.

Charles Robert Darwin

The leaves of floating aquatic plants have a _ _ _ _ _ _ _ _ _ _ _ _ _ _ coating to prevent rotting in water.

waxy

_ _ _ _ _ _ _ _ _ _ _ _ _ _ and _ _ _ _ _ _ _ _ _ _ _ _ _ _ are common submerged aquatic plants.

Vallisneria, Hydrilla

The body of fish is _ _ _ _ _ _ _ _ _ _ _ _ _ _ shaped, which offers least resistance while swimming.

streamlined (or spindle-shaped or boat-shaped)

Some fish have an air-filled _ _ _ _ _ _ _ _ _ _ _ _ _ _ that provides buoyancy.

bladder

Desert climate is dry and hot in the daytime but is _ _ _ _ _ _ _ _ _ _ _ _ _ _ at night.

cold

The stem of desert plants is _ _ _ _ _ _ _ _ _ _ _ _ _ _ and _ _ _ _ _ _ _ _ _ _ _ _ _ _ to store water.

spongy, succulent

In cacti, the _ _ _ _ _ _ _ _ _ _ _ _ _ _ becomes green to carry out photosynthesis.

stem

The _ _ _ _ _ _ _ _ _ _ _ _ _ _ of a Kikar tree is reddish-brown or blackish and rough to prevent water evaporation.

bark

Desert animals that are active at night are called _ _ _ _ _ _ _ _ _ _ _ _ _ _.

nocturnal

A camel can store a large quantity of water in the _ _ _ _ _ _ _ _ _ _ _ _ _ _ of its stomach wall.

water cells

Mountain plants are usually tall and straight trees, having a _ _ _ _ _ _ _ _ _ _ _ _ _ _ appearance.

cone-shaped

The leaves of mountain plants are _ _ _ _ _ _ _ _ _ _ _ _ _ _ -like to prevent water loss and help snow slide down.

needle

Mountain animals have _ _ _ _ _ _ _ _ _ _ _ _ _ _ for running on rocky slopes.

strong hooves

Mammals in mountain regions have more _ _ _ _ _ _ _ _ _ _ _ _ _ _ to compensate for low oxygen.

red blood corpuscles

Some mountain animals _ _ _ _ _ _ _ _ _ _ _ _ _ _ to conserve energy for winter.

hibernate

In birds, forelimbs are modified into _ _ _ _ _ _ _ _ _ _ _ _ _ _ for flight.

wings

The breast muscles of birds are _ _ _ _ _ _ _ _ _ _ _ _ _ _ to control wing movement during flight.

enlarged

Birds have _ _ _ _ _ _ _ _ _ _ _ _ _ _ bones, which are hollow and have air cavities.

pneumatic

Birds have a toothless horny _ _ _ _ _ _ _ _ _ _ _ _ _ _ which reduces body weight.

beak

The seeds of plants like Madar and Dandelion have _ _ _ _ _ _ _ _ _ _ _ _ _ _ to be carried away by the wind.

silky hair (or hairy)

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