Desert Ecosystem

Q. Animals which are active during night and sleep during the day are called .

Q.

Is opuntia a xerophytic plant?

Q. Which adaption helps the camel to survive in the hot and dry desert?

1. It has a layer of fat under its skin
2. It sleeps during the day and is active at night
3. It stores fat in its hump which can be broken down when it need energy
4. It stores water in its long neck

Q.

Question 13

If you happen to go to a desert, what changes do you expect to observe in the urine you excrete? You would

1. Excrete small amount of urine.
2. Excrete large amount of urine.
3. Excrete concentrated urine.
4. Excrete very dilute urine.

Which of the above would hold true?
(a) 1 and 3
(b) 2 and 4
(c) 1 and 4
(d) 1 and 2

Q. Which among the following desert animal is adapted to live without drinking water throughout its life?

1. Fennec fox
2. Kangaroo rat
3. Sand grouse
4. Golden mole

Q.

Give two pteridophyte applications.

Q. In Baobab tree, the is swollen to store water.

Q.

Which of the following briefly describes the desert climate?

1. Hot and humid

2. Dry and humid

3. Hot and dry

4. Hot and wet

Q. How are 'living stones' adapted to desert conditions?

1. Swollen trunk
2. Swollen leaves
3. Reduced leaves
4. Succulent stem

Q.

Apart from helping to conserve water, what other purpose do the spines in cactus serve?

1. Absorption of water

2. Capturing food

3. Protection from grazing animals

4. Absorption of nutrients

Q.

Why the plants of a snowy cold mountain (pine tree) and the plants of a hot arid desert (cactus) are different in structure and shape?

1. There structure and shape is not different.

2. The structure and shape of trees develop according to the surroundings.

3. Pine and other similar trees don't need water, they need snow to grow.

4. Cactus can survive in snow and pine can survive in desert.

Q.

Long eyelashes to prevent sand particles from entering the eyes are found in

1. lion

2. snake

3. camel

4. mountain goat

Q. Which of the following statement(s) is/are correct about nocturnal animals?

1. These animals are active during night time and sleep during day time.
2. These animals have less developed eye sights.
3. These animals have highly developed sense of hearing and smell.
4. Cats, rats, and owls are examples of nocturnal animals.

Q. Which adaption helps the camel to survive in the hot and dry desert?

1. It stores water in its long neck
2. It has a layer of fat under its skin
3. It sleeps during the day and is active at night
4. It stores fat in its hump which can be broken down when it needs energy

Q. Which among the following desert animal is adapted to live without drinking water throughout its life?

1. Kangaroo rat
2. Fennec fox
3. Sand grouse
4. Golden mole

Q. These plants store water in their stems in order to:

1. Survive in dry conditions
2. Increase transpiration
3. Attract insects
4. Survive in aquatic habitat

Q. Which among the following characteristics are generally observed in nocturnal animals?

1. Specially adapted eyesight
2. Highly developed sense of smell
3. Highly developed sense of hearing
4. Produce high pitched sounds

Q.

Why are algae red?

Q. The advancement of cnidarians over Porifera is

1. True germ layers
2. Muscle cells
3. Both A and B
4. Indefinite symmetry

Q. Webbed feet and waterproof feathers are the features of which one of the following types of birds?

1. Flightless birds
2. Waterbirds
3. Walking birds
4. Birds flying at height
5. None of these

Q. Type of plants having adaptations to check transpiration is

1. Xerophytes
2. Lithophytes
3. Halophytes
4. Epiphytes

Q.

A surprising number of insects on milkweed plants share the same red and black colors. Explain the specific reason

1. prey

2. moth

3. both b and c

4. predator

Q. A nocturnal rodent producing pig like grunts is

1. Porcupine
2. Guinea Pig
3. Rat
4. Beaver

Q.

Cereal crops have fibrous roots and pulses have tap roots. What do you infer from this statement?

1. Cereal crops are dicots and pulses are monocots.

2. Cereal crops are monocots and pulses are dicots.

3. Cereal crops can't be uprooted easily as compared to pulses.

4. Cereal crops require less amount of water as compared to pulses.

Q. Which among the following desert animal is adapted to live without drinking water throughout its life?

1. Golden mole
2. Fennec fox
3. Sand grouse
4. Kangaroo rat