6th Grade > Biology
LIVING ORGANISMS AND THEIR SURROUNDINGS MCQs
Total Questions : 40
| Page 2 of 4 pages
Answer: Option B. ->
To minimise water loss through transpiration
:
B
In deserts there is scarcity of water. If the plants have reduced leaves or no leaves at all, it will reduce the surface area and the number of stomata. This minimises the water loss through transpiration.
:
B
In deserts there is scarcity of water. If the plants have reduced leaves or no leaves at all, it will reduce the surface area and the number of stomata. This minimises the water loss through transpiration.
Answer: Option C. ->
1- c; 2- a; 3- d; 4-b.
:
C
:
C
∙ Sea animals like dolphins and blue whales breathe using blowholes.
∙ Fishes make use of gills to breathe.
∙ Human beings breathe through their nostrils and their breathing organs are lungs.
∙ Earthworms breathe through their skin (cutaneous).
Answer: Option A. ->
Frog
:
A
Frogs are classified as amphibians, i.e., animals that live on land as well as in water. They have few adaptive features such as strong legs that help them in leaping and webbed feet which help them to swim in the water. They have lungs to breathe on land, and skin is adapted to help them breathe in water.
Fishes are aquatic organisms. Silverfish is an insect that cannot fly, and it is a terrestrial organism. Crow, a bird, is an aerial organism.
:
A
Frogs are classified as amphibians, i.e., animals that live on land as well as in water. They have few adaptive features such as strong legs that help them in leaping and webbed feet which help them to swim in the water. They have lungs to breathe on land, and skin is adapted to help them breathe in water.
Fishes are aquatic organisms. Silverfish is an insect that cannot fly, and it is a terrestrial organism. Crow, a bird, is an aerial organism.
Answer: Option A. ->
True
:
A
:
A
Breathing is a process through which air containing oxygen and carbon dioxide is taken into the body. The oxygen is then taken into the blood from the lungs and is transported to all the cells. Cells use this oxygen to obtain energy from the nutrients in the food we eat. This process is called respiration. So breathing takes in oxygen esssential for respiration.
Answer: Option A. ->
True
:
A
The presence of specific features which enable an organism to survive in a particular habitat are called adaptations. Adaptations can help an organism find food and water, protect itself and survive in extreme environment.
:
A
The presence of specific features which enable an organism to survive in a particular habitat are called adaptations. Adaptations can help an organism find food and water, protect itself and survive in extreme environment.
Answer: Option B. ->
Respiration
:
B
Respiration is the process by which the glucose in the food is broken down in the presence of oxygen to produce energy. This energy is utilised by our body for its survival.
:
B
Respiration is the process by which the glucose in the food is broken down in the presence of oxygen to produce energy. This energy is utilised by our body for its survival.
Answer: Option A. ->
terrestrial
:
A
∙ Terrestrial habitats are geographical areas that are found on land. Forests, grasslands and deserts are examples of terrestrial habitats. Grassland habitats, in particular, are places that generally receive more rainfall than deserts but lesser rainfall than forests.
∙ Aquatic habitats include seas and oceans. Freshwater habitats include rivers and ponds.
:
A
∙ Terrestrial habitats are geographical areas that are found on land. Forests, grasslands and deserts are examples of terrestrial habitats. Grassland habitats, in particular, are places that generally receive more rainfall than deserts but lesser rainfall than forests.
∙ Aquatic habitats include seas and oceans. Freshwater habitats include rivers and ponds.
Answer: Option B. ->
absorb water
:
B
∙ Since desert plants live in areas where water is scarce, their roots are long and go deep into the soil for absorbing water.
∙ The leaves in desert plants are reduced to spines to minimise water loss by transpiration.
∙ They have fleshy stem with a thick waxy coat to retain water.
∙ Since their leaves are reduced to spines, their stem is green and performs photosynthesis.
:
B
∙ Since desert plants live in areas where water is scarce, their roots are long and go deep into the soil for absorbing water.
∙ The leaves in desert plants are reduced to spines to minimise water loss by transpiration.
∙ They have fleshy stem with a thick waxy coat to retain water.
∙ Since their leaves are reduced to spines, their stem is green and performs photosynthesis.
Answer: Option A. ->
To maintain balance of the body
:
A and C
Fishes have flat fins and tail that help them to change direction and keep balance in water. They have gills that help them to absorb oxygen dissolved in water. They also have scales on their body that protect them from injury.
:
A and C
Fishes have flat fins and tail that help them to change direction and keep balance in water. They have gills that help them to absorb oxygen dissolved in water. They also have scales on their body that protect them from injury.
Answer: Option D. ->
Rocks
:
D
For plants to grow, they need water, air and sunlight. Without them, plants cannot perform photosynthesis. Rocks are not needed for the growth of plants. Plants can grow with and without soil too and they don't need rocks to survive.
:
D
For plants to grow, they need water, air and sunlight. Without them, plants cannot perform photosynthesis. Rocks are not needed for the growth of plants. Plants can grow with and without soil too and they don't need rocks to survive.
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