CBSE Class 8 Science Conservation Of Plants And Animals Worksheet

Question. Your friend finds a plant with a vascular system and roots, but no seeds. You tell her it is a __________.
(a) moss
(b) fern
(c) gymnosperm
(d) angiosperm

Answer : B

Question. Night-blooming flowers often LACK which of these?
(a) colours
(b) strong scent
(c) pollen grains
(d) (nothing - they are no different from day-blooming flowers)

Answer : A

Question. Which species was the first to become extinct?
Answer the question with the information given in the diagram below. Letters P through Y represent different species of organisms.

(a) R
(b) S
(c) T
(d) V

Answer : B

Question. Which species has managed to successfully remain unchanged through the years?
Answer the question with the information given in the diagram below. Letters P through Y represent different species of organisms.

(a) P
(b) Q
(c) U
(d) Y

Answer : B

Question. Most flowers bloom in the day and are brightly coloured. Compared to day-blooming flowers, it is likely that night-blooming flowers __________.
(a) are brighter but not so strongly scented
(b) are not as bright but more strongly scented
(c) are not as bright and not so strongly scented
(d) (follow no comparable pattern of brightness or scentedness )

Answer : B

Question. Among the following which would classify as a jellyfish?
Look at the flow chart given below and answer the question. 

Answer : A

Question. The pesticide DDT accumulates in the fatty tissue of animals and is transferred along food chains. DDT's concentration increases along each link of the food chain. Which of the following organisms in the food web would accumulate the highest concentration of DDT?
Look at the food web given here and answer the question. 

(a) corn
(b) mouse
(c) snake
(d) Hawk

Answer : D

Question. The graph given shows the population of two species ladybirds and aphids over time. Which of these appears to be a possibility based on this graph? 

(a) Ladybirds probably feed on aphids
(b) Aphids probably feed on ladybirds
(c) Ladybirds and aphids do not feed on each other
(d) Nothing can be said about them based on this

Answer : A

Question. The Wildlife Institute of India survey reveals that 70-80% of individual freshwater marshes and lakes in the Gangetic plains have been lost in the last five decades. At present only 50% of India's wetlands remain. Which of the following is a NOT a cause for the disappearance of wetlands?
(a) Increasing urbanization and industrialisation
(b) Increased tree-cutting and deforestation
(c) Increase in migratory bird population
(d) Recovery of marsh land for agriculture

Answer : C

Question. Use the information given in the picture and answer the following question. Which among the following statements is a VALID conclusion?

(a) The total energy intake by each of these animals is the same.
(b) A mouse needs more energy for growth and reproduction than a cow.
(c) For these animals, the undigested component is more than that used for growth/reproduction.
(d) A Grasshopper uses a very small part of the energy from digested food for respiration.

Answer : C

Question. A desert is a region that receives very little rainfall. Not all deserts are hot - cold deserts occur in temperate regions at high latitudes.
Which of the following temperature - rainfall graphs corresponds to a desert? [In these graphs the line refers to the temperature and the bars refer to the rainfall]

Answer : C

Question. Study the flowchart shown and also see the four types of leaves marked P, Q, R and S. Which of these correctly identifies them?

(a) A
(b) B
(c) C
(d) D

Answer : D

Question. The cross section of a flower is shown below. Which letter correctly represents the part of the flower where the pollen grains are transferred?

(a) A
(b) B
(c) C
(d) D

Answer : A

Question. K and L are likely to be
Observe the food web shown below and answer the question.

(a) Organisms that feed on plants.
(b) Organisms that feed on other animals.
(c) Organisms that feed on plants as well as animals.
(d) Non-living objects.

Answer : B

Question. Identify the list below that contains only INVERTEBRATES.
(a) crabs, turtles, tortoises, whales.
(b) fish, spiders, men, monkeys
(c) sponges, scorpions, crabs.
(d) centipedes, earthworms, crocodiles

Answer : C

Question. Given below is an incomplete food chain. Identify the right animals from the list given to complete the food chain.

(a) 1-rat, 2-cat, 3-snake, 4-hawk
(b) 1-rat, 2-snake, 3-cat, 4-hawk
(c) 1-rat, 2-hawk, 3-snake, 4-cat
(d) 1-rat, 2-hawk, 3-cat, 4-snake

Answer : A

Question. A girl found the skull of an animal. She did not know what the animal was but she was sure that it preyed on other animals for its food. What clue led to this conclusion?
(a) The eye sockets faced sideways.
(b) The skull was much longer than it was wide.
(c) Four of the teeth were long and pointed.
(d) The jaws could move sideways as well as up and down.

Answer : C

Question. Observe the food web shown here. Which list contains all the CONSUMERS in this food web?

(a) Grasses, shrubs
(b) Grasses, shrubs, grasshoppers, mice, rabbits
(c) Hawks, foxes,Grass
(d) Grasshoppers, mice, rabbits, birds, hawks, foxes

Answer : D

Question. An armadillo is a small animal. Sometimes, it curls up, and then its armored body looks like a ball. A coral snake can curl its tail into a tight spiral and hold it up. This attracts attention to its tail, protecting its head. Under what situation is it likely that the animals behave in the way described above?

(a) When it gets very cold.
(b) When they have to protect themselves.
(c) When they have to attack enemies.
(d) When they are hibernating.

Answer : B

Question. Shown here is a food web. Study it carefully and answer questions. 
Which of the following characteristics is shown by the members of level II.

(a) They are animals.
(b) They feed mostly on plants.
(c) They are eaten by plants.
(d) They make their own food.

Answer : B

Question. Which of the following is a probable consequence of a decrease in the number of trees on Earth?
(a) An increase in the concentration of atmospheric ozone
(b) A decrease in the amount of ultraviolet light reaching Earth's surface
(c) An increase in silt found in Earth's rivers
(d) A decrease in silt found in Earth's rivers

Answer : C

Question. Plants have unique features that help them fit into the environment they live in. Which among these is NOT an illustration of the above statement?
(a) Lotus leaves have a wax like coating on their upper surface
(b) A submerged water plant hydrilla has finger like leaves.
(c) Money plant is a climber.
(d) Cactus has leaves reduced in size.

Answer : C

Question. Shown here is an aquatic food web. According to the figure, who are the competitors for 'Big Fish'?

(a) Humans and birds only
(b) Sand eels and seals only
(c) Humans, birds and sand eels only
(d) Seals only

Answer : A

Question. Which of these cannot be considered a direct effect of increase in human population?
(a) Increase in number of new micro-organisms.
(b) increase in the area of deforested land.
(c) increase in the amount of carbon dioxide in the air.
(d) increase in the number of people below poverty line.

Answer : A

Question. Which of the following parts is present in a plant cell but absent in an animal cell?
(a) Centriole
(b) Nucleus
(c) Cytoplasm
(d) Cell wall

Answer : D

Question. Cartilage is a tough, elastic, fibrous connective tissue found in various parts of the body. Which of these is a place where cartilage is found?
(a) Backbone
(b) Femur (thigh bone)
(c) Finger bones
(d) The tip of the nose

Answer : D

Question. The increase in rate of respiration observed probably serves what purpose?
(a) More glucose is delivered to the muscles as their energy source
(b) More haemoglobin is delivered to the muscles as their energy source.
(c) More oxygen is delivered in order to break down glucose to do work.

Answer : C

Question. Plants have unique features that help them fit into the environment they live in. Which among these is NOT an illustration of the above statement?
(a) Lotus leaves have a wax like coating on their upper surface.
(b) A submerged water plant hydrilla has finger like leaves.
(c) Money plant is a climber.
(d) Cactus has leaves reduced in size.

Answer : C

Question. When Sheila's blood was tested, none of the three samples clotted. What is her blood group?
(a) A+
(b) AB-
(c) O-
(d) There is an error in the results.

Answer : C
 

1. Deforestation means
a) Cleaning of forests
b) To grow plants
c) To look after plants
d) None of these

2. The plants found in particular area are termed as .
a) Fauna
b) Flora
c) Endemic species
d) wild animals

3. Red data book keeps the record of
a) Endangered species
b) Sanctuary
c) Plants
d) Animals

4. Project - Tiger means.
a) Hunting of tigers
b) Rearing of tigers
c) Survival & maintanance of tigers
d) All of these

5. Write one word for the following sentences.

(Hint : Ecosystem, National Park, Endangered species, Biosphere reserve, Sanctuary)

a) Animals whose numbers are diminishing to a level and they might face extinction ________ 

b) All the plants, animals and micro-organism in an area along with non-living component ____________.

c) An area where animals are protected from any disturbance to them and their habitat ___________.

d) An area reserved for wild life, where they can freely use the habitats & natural resources _____________.

e) A large area of protected land for conservation of wild life, plant & animal resourceS.

6. Do you Know?

a) How many tress are cut to get I tonne paper ________________.

b) How many times a paper can be recycled __________________.

7. Some animal and given below which belong to pachmarhi biosphere reserve, identity them and write their names.