6.

Question 1

Which feature of a camel’s body helps it survive in the desert environment?
a) Its ability to sweat excessively
b) Its long legs that keep its body away from the hot sand
c) Its streamlined body shape for movement in the desert
d) Its flat fins that help it change directions in the sand

Answer 1

Answer: b) Its long legs that keep its body away from the hot sand

Question 2

The process of adaptation in organisms is primarily influenced by which of the following?
a) The availability of food only
b) The physical features and behaviors suited to the environment
c) The migration patterns of organisms
d) The seasonal changes in the habitat

Answer 2

Answer: b) The physical features and behaviors suited to the environment

Question 3

In the context of the desert habitat, which of the following adaptations help reduce water loss in camels?
a) Long necks to increase exposure to wind
b) Reduced surface area to minimize evaporation
c) Ability to store large amounts of water in the body
d) Absence of sweat glands to conserve moisture

Answer 3

b) Reduced surface area to minimize evaporation

Question 4

Which of the following correctly describes the concept of ‘adaptation’ as it applies to the relationship between an organism and its environment?
a) The process through which an organism adapts to new environments by migrating
b) The modification of an organism’s physical features or behavior to increase survival in a specific environment
c) The genetic evolution of species to acquire traits beneficial in any habitat
d) The shift in the habitat of an organism in response to changing environmental factors

Answer 4

Answer: b) The modification of an organism’s physical features or behavior to increase survival in a specific environment

Question 5

Which of the following is a characteristic adaptation found in both desert and marine organisms?
a) Ability to excrete dry waste to conserve water
b) Presence of specialized organs to filter out toxins
c) Evolution of long limbs for better movement across terrain
d) Development of large body size to reduce predation

Answer 5

Answer: a) Ability to excrete dry waste to conserve water

Question 6

Which of the following best describes a ‘habitat’ in ecological terms?
a) The study of the interactions between different species within an ecosystem
b) The specific environment where an organism lives, including both biotic and abiotic components
c) The process by which an organism becomes extinct due to environmental changes
d) The periodic movements of species from one region to another

Answer 6

Answer: b) The specific environment where an organism lives, including both biotic and abiotic components

Question 6

Which of the following features of a desert plant is an adaptation to reduce water loss and survive in arid conditions?
a) Large, broad leaves for maximum surface area
b) Shallow root systems to absorb surface moisture
c) Thick, waxy coating on stems to minimize transpiration
d) Deep, extensive root systems for maximum nutrient absorption

Answer 6

Answer:
c) Thick, waxy coating on stems to minimize transpiration

Question 7

Which of the following is an example of a desert plant adaptation to reduce transpiration?
a) Large, broad leaves to increase surface area
b) Leaves modified into spines to reduce surface area
c) Extensive root systems to increase nutrient uptake
d) Thick bark to insulate against the sun

Answer 7

Answer:
b) Leaves modified into spines to reduce surface area

Question 8

Consider the following statements regarding the behavioral adaptations of desert animals:

1Desert rodents and snakes are primarily nocturnal, which helps them avoid the extreme daytime heat.
2Many desert animals, such as the camel, store large amounts of water in their bodies to survive for long periods.
3 Camels have a natural ability to sweat profusely to cool their bodies.
Which of the statements given above is/are correct?
a) 1 only
b) 1 and 2 only
c) 2 and 3 only
d) 1, 2 and 3

Answer 8

Answer:
b) 1 and 2 only

Explanation:
Statement 1 is correct because nocturnal behavior helps desert animals avoid the intense daytime heat. Statement 2 is correct as camels store water in their body, especially in their humps. Statement 3 is incorrect because camels do not sweat profusely to conserve water; they have other adaptations that help them minimize water loss.

Question 8

Which of the following distinguishes all living organisms from non-living things?
a) Presence of movement
b) Cellular structure
c) Visible growth in size
d) Ability to reflect light

Answer 8

Answer:
b) Cellular structure

Explanation:
All living organisms have a cellular structure, whereas non-living things do not. Movement and visible growth are not universal to all living organisms.

Question 8

1. Which of the following statements correctly explains the process of respiration in plants?

1 Plants respire only at night when photosynthesis is not taking place.
2 Respiration in plants involves the intake of oxygen and release of carbon dioxide.
3 The oxygen released during photosynthesis exceeds the oxygen consumed during respiration.
Select the correct answer using the codes below:
a) 1 and 2 only
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2, and 3

Answer 8

Answer:
b) 2 and 3 only

Explanation:
Plants respire continuously, both day and night (Statement 1 is incorrect). The oxygen released during photosynthesis exceeds the oxygen used in respiration (Statement 3 is correct).

Question 8

2. Consider the following adaptations for gas exchange in living organisms:

1 Earthworms breathe through their skin.
2 Fish absorb oxygen through gills.
3 Mammals use lungs for respiration.
Which of these mechanisms involve oxygen dissolved in water?
a) 1 only
b) 2 only
c) 1 and 2 only
d) 1, 2, and 3

Answer 8

Answer:
c) 1 and 2 only

Explanation:
Earthworms and fish utilize oxygen dissolved in water through their respective mechanisms, while mammals breathe atmospheric oxygen

Question 8

. Consider the following statements about excretion in plants and animals:

1 Animals excrete metabolic wastes through specialized organs.
2 Plants store waste products in non-harmful ways or secrete them.
3 Excretion is not a universal characteristic of living organisms.
Which of the statements given above is/are correct?
a) 1 and 2 only
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2, and 3

Answer 8

Answer:
a) 1 and 2 only

Explanation:
Excretion is a universal characteristic of living organisms, though mechanisms vary (Statement 3 is incorrect).

Question 9

Which of the following distinguishes living organisms from non-living objects?
a) Movement from one place to another
b) Excretion of metabolic wastes
c) Growth due to external material accumulation
d) Presence of definite shape and size

Answer 9

Answer:
b) Excretion of metabolic wastes

Explanation:
Excretion is a metabolic process unique to living organisms. Non-living objects may grow due to external material accumulation but lack metabolic activity.

Question 10

Which of the following examples correctly illustrate respiration in different organisms?

1Dolphins use lungs to breathe in air.
2 Fish absorb dissolved oxygen through gills.
3Cockroaches use spiracles and tracheae for respiration.
Select the correct answer using the codes below:
a) 1 only
b) 1 and 2 only
c) 2 and 3 only
d) 1, 2, and 3

.

Answer 10

Answer:
d) 1, 2, and 3

Explanation:
Dolphins breathe atmospheric air using lungs, fish use gills for dissolved oxygen, and cockroaches rely on spiracles and tracheae for respiration

Question 11

Which of the following is NOT a stimulus for living organisms?
a) Change in light intensity
b) Sound or vibrations
c) Internal metabolic processes
d) Gravitational force

Answer 11

Answer:
c) Internal metabolic processes

Explanation:
Internal metabolic processes are functions of living organisms, not external stimuli. External changes like light, sound, and gravity act as stimuli.

Question 12

Which of the following is/are examples of responses to stimuli in plants?
1 Leaves of Mimosa plant folding when touched.
2 Sunflower changing its orientation to follow the sun.
3 Photosynthesis in the presence of sunlight.
Select the correct answer using the codes below:
a) 1 only
b) 1 and 2 only
c) 2 and 3 only
d) 1, 2, and 3

Answer 12

Answer:
b) 1 and 2 only

Explanation:

Mimosa plant folds its leaves as a direct response to physical touch, a clear example of response to stimuli.
Sunflowers exhibit heliotropism, adjusting their orientation to maximize sunlight capture, another response to stimuli.
Photosynthesis is a biochemical process dependent on sunlight but not an immediate response to stimuli.

Question 13

Regarding excretion in plants, which of the following statements is correct?
1 Plants store waste products in vacuoles or specific parts of the plant.
2 All plants excrete waste through specialized organs similar to animals.
3 Some plants excrete waste products as secretions.
a) 1 and 3 only
b) 1 only
c) 2 and 3 only
d) 1, 2, and 3

.

Answer 13

Answer:
a) 1 and 3 only

Explanation:

Plants store waste in vacuoles or non-living parts, such as bark or leaves, without harming themselves.
They do not have specialized organs for excretion, unlike animals.
Some plants excrete waste through secretions such as gums or resins

Question 14

Match the following adaptations with the corresponding animals:
Adaptation Animal
a) Skin for gas exchange 1) Frog
b) Gills for respiration 2) Dolphin
c) Lungs for air breathing 3) Earthworm
Choose the correct answer:
a) a-1, b-2, c-3
b) a-3, b-1, c-2
c) a-3, b-2, c-1
d) a-1, b-3, c-2

.

Answer 14

Answer:
b) a-3, b-1, c-2

Explanation:

Earthworms use their skin for gas exchange.
Frogs utilize gills in their tadpole stage and lungs as adults, so they align with gills for this context.
Dolphins rely on lungs for breathing atmospheric oxygen through blowholes

Question 15

3. Which of the following is/are true about seeds like moong?
   1 Seeds are non-living as they show no life processes in storage conditions.
   2 Seeds can exhibit life processes like respiration even in dormant states.
   3 A seed’s ability to grow and reproduce depends on external conditions like water and soil.
   a) 1 only
   b) 2 and 3 only
   c) 1 and 3 only
   d) 1, 2, and 3

Answer 15

Answer:
b) 2 and 3 only

Explanation:

Seeds are living but dormant under storage conditions. They respire slowly and can become active under favorable conditions, leading to growth and reproduction.

Question 16

1 Consider the following processes in living organisms:
2 Respiration in dormant seeds.
3 Growth of a plant from a cutting.
Excretion in plants through secretions.
Which of these processes can occur without active movement?
a) 1 and 2 only
b) 1 and 3 only
c) 2 and 3 only
d) 1, 2, and 3

Answer 16

Answer:
b) 1 and 3 only

Explanation:

Respiration in dormant seeds and excretion in plants through secretions do not involve active movement.
Growth from a cutting involves internal transport and cell division, which are active processes

Question 17

Why are seeds in storage sacks found to be warm when touched?
a) Seeds are non-living but retain heat from external sources.
b) Seeds undergo respiration, releasing heat as a by-product.
c) Stored seeds decompose, generating heat due to microbial activity.
d) Stored seeds are insulated and retain the heat of their surroundings.

Answer 17

Answer:
b) Seeds undergo respiration, releasing heat as a by-product.

Explanation:

Even in storage, seeds continue to respire slowly, releasing heat during the process

Question 18

8. Which of the following statements best distinguishes living and non-living things?
   a) Non-living things can never exhibit characteristics of life like movement or growth.
   b) Living things exhibit all characteristics of life simultaneously.
   c) Living organisms always need food to survive.
   d) Non-living things can exhibit some characteristics of life under certain conditions but not all simultaneously.

Answer 18

Answer:
d) Non-living things can exhibit some characteristics of life under certain conditions but not all simultaneously.

Explanation:

Non-living things may show isolated characteristics like movement (e.g., clouds) or growth (e.g., crystal formation), but they lack the integrated functionality of life.

Question 19

11. Which of the following statements about excretion in plants is correct?
    a) Plants do not excrete wastes like animals do.
    b) Plants excrete by secreting waste products or storing them in non-vital parts.
    c) Plants release carbon dioxide and oxygen as excretory products during photosynthesis.
    d) Excretion in plants is an active process similar to animals.

Answer 19

Answer:
b) Plants excrete by secreting waste products or storing them in non-vital parts.

Explanation:

Plants either store waste in parts that later shed (like leaves) or secrete waste products like resins or gums.

Question 19

Consider the following processes:
1 Movement of substances like water and minerals in plants.
2 Bending of plants toward light (phototropism).
3 Reproduction of plants through cuttings.
Which of the above require external stimuli to occur?
a) 1 only
b) 1 and 2 only
c) 2 and 3 only
d) 1, 2, and 3

Answer 19

Answer:
c) 2 and 3 only

Explanation:

Bending toward light (phototropism) and reproduction through cuttings are responses to external stimuli like light and human intervention, respectively.

Question 19

. Which of the following correctly describes the relationship between respiration and excretion in living organisms?
a) Both are independent processes without any connection.
b) Respiration produces waste products that are removed by excretion.
c) Excretion is only necessary in animals, while respiration occurs in all living things.
d) Excretion is required only for gaseous waste products of respiration.

Answer 19

Answer:
b) Respiration produces waste products that are removed by excretion.

Explanation:

Respiration generates waste like carbon dioxide, which is excreted by animals and plants through various mechanisms.

Question 20

Which of the following is not an indicator of life in dormant seeds?
a) Respiration
b) Growth in size
c) Heat production
d) Germination under suitable conditions

Answer 20

Answer:
b) Growth in size

Explanation:

Dormant seeds do not grow in size until they germinate, but they continue to respire and produce heat, indicating they are alive.