12th Grade > Biology
THE LIVING WORLD MCQs
The Living World, Living Organisms And Their Surroundings, Diversity In Living Organisms
Total Questions : 114
| Page 10 of 12 pages
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.
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
∙Sea animals like dolphins and blue whales breathe usingblowholes.
∙Fishes make use ofgills to breathe.
∙Human beings breathe through their nostrils and their breathing organs are lungs.
∙Earthworms breathe through their skin (cutaneous).
:
C
∙Sea animals like dolphins and blue whales breathe usingblowholes.
∙Fishes make use ofgills 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. -> 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 A. -> True
:
A
Breathingis a process through which air containing oxygen and carbon dioxideis 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.
:
A
Breathingis a process through which air containing oxygen and carbon dioxideis 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 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 C. -> Movement
:
C
There are seven characteristics of living things:movement, breathing, respiration, excretion, growth, sensitivity and reproduction. Some non-living things may show one or two of these characteristics like movement. Cars/buses move but they are non-living things. But living things show all seven characteristics.
:
C
There are seven characteristics of living things:movement, breathing, respiration, excretion, growth, sensitivity and reproduction. Some non-living things may show one or two of these characteristics like movement. Cars/buses move but they are non-living things. But living things show all seven characteristics.
Answer: Option B. -> breathing
:
B
The process by which an organism takes in oxygen and gives out carbon dioxide is called breathing. Breathing is the physical part of the process known as respiration. It is through respiration that we obtain energy.
:
B
The process by which an organism takes in oxygen and gives out carbon dioxide is called breathing. Breathing is the physical part of the process known as respiration. It is through respiration that we obtain energy.
Answer: Option A. -> True
:
A
Anything that causes aliving organismtoreactis called astimulus. All living organisms respondto their environment.Response to stimuliis an important characteristicof life.
:
A
Anything that causes aliving organismtoreactis called astimulus. All living organisms respondto their environment.Response to stimuliis an important characteristicof life.
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