Morphological Adaptations

Q. Sunken stomata are found in:

1. Hydrophytes
2. Xerophytes
3. Mesophytes
4. Halophytes

Q.

Statement 1: The photosynthetic function of Opuntia is taken over by the flattened stems.

Statement 2: Opuntia has no leaves – they are reduced to spines.

1. Statement 1 is correct and statement 2 is incorrect

2. Both statements 1 and 2 are incorrect.

3. Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1.

4. Both statements 1 and 2 are correct and statement 2 is not the explanation of statement 1.

Q. In the polar seas, aquatic ...a... like ...b... have a thick layer of fat called ...c... below their skin that acts as an ...d... and reduces loss of body heat.

1. a—fishes, b—sharks, c—clasper, d—conductor
2. a—mammals, b—seals, c—blubber, d—insulator
3. a—fishes, b—seals, c—blubber, d—insulator
4. a—mammals, b—seals, c—blubber, d—conductor

Q.

Assertion (A): Scotoactive stomata are found in succulent xerophytes

Reason (R): Presence of scotoactive stomata is a type of xeric adaptations of succulent plants

1. Both A & R are true and R does not explain A

2. Both A & R are false

3. Both A & R are true and R explains A

4. A is True and R is false

Q.

Statement 1: The photosynthetic function of Opuntia is taken over by the flattened stems.

Statement 2: Opuntia has no leaves – they are reduced to spines.

1. Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1.

2. Both statements 1 and 2 are correct and statement 2 is not the explanation of statement 1.

3. Statement 1 is correct and statement 2 is incorrect

4. Both statements 1 and 2 are incorrect.

Q. Sunken stomata are found in:

1. Hydrophytes
2. Xerophytes
3. Mesophytes
4. Halophytes

Q. Root cap is not found in

1. Xerophytes
2. Mesophytes
3. Hydrophytes
4. Halophytes

Q. Every ______(i)_____the Keoladeo National Park in Rajasthan hosts thousands of migratory birds coming from Siberia.

Desert lizards lack the____(ii)_____ability that mammals have to deal with the high temperatures, but manage to keep their body temperature fairly constant by____(iii)_____means.

In the polar seas aquatic mammals like seals have a thick layer of____(iv)______ below their skin that acts as an insulator and reduces loss of body heat.

1. i - summer, ii - behavioural, iii - physiological, iv - protein (blubber)
2. i - winter, ii - behavioural, iii - physiological, iv - fat (blubber)
3. i - winter, ii - physiological, iii - behavioural, iv - fat (blubber)
4. i - summer, ii - physiological, iii - behavioural, iv - fat (blubber)

Q. How do desert plants and animals adapt themselves to their surroundings?

Q. Assertion – Daphnia populations in a water body at different seasons of an year showed marked variations in their body morphology
Reason – Cyclomorphosis in some planktonic organisms is influenced by the variations in temperatures prevailing in their water bodies at different seasons

1. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
2. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
3. Assertion is true but Reason is false
4. Assertion is false but Reason is true

Q. Write two adaptions of aquatic plants.

Q.

In which plant group did stomata first appear?

Q.

Describe stomata in bryophytes

Q. Siberian Husky is a breed of dog that originated from the coldest region of Siberia (Russia). Would a city like New Delhi be a good place to rear such a breed of dog?

1. Yes. During winters, the temperatures in New Delhi goes below C
2. No. Siberian Huskies cannot tolerate the soaring heat waves that would occur during summer.
3. No. Siberian Huskies have a thick skin and fur, which is not suitable for a temperate climate like that in New Delhi.
4. Yes. Dogs are not affected by climate.

Q.

Sunken stomata occurs in ______________.

1. Hydrophytes

2. Xerophytes

3. Mesophytes

4. Hygrophytes

Q.

The thick coat of fur protects the mountain goat from_______________________.(cold/rain)

Q.

How respiration takes place in class Cyclostomata?

Q. Define phenotypic adaptation. Give one example.

Q.

Define phenotypic adaption. Give one example.

Q. Choose the correct option for the statements given below.
Statement 1 - Amphistomatic leaves are leaves with non-functional stomata.
Statement 2 - Sunken stomata is a differentiating characteristic of xerophytes.

1. Both statements are incorrect.
2. Both statements are correct.
3. Statement 1 is correct but statement 2 is incorrect.
4. Statement 1 is incorrect but statement 2 is correct.

Q. Which of the following is a characteristic feature of a musk ox?

1. Snowy white skin
2. Small body and lesser surface area for skin
3. Long hollow hair on the body
4. All of these

Q.

Statement 1: The photosynthetic function of Opuntia is taken over by the flattened stems.

Statement 2: Opuntia has no leaves – they are reduced to spines.

1. Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1.

2. Both statements 1 and 2 are correct and statement 2 is not the explanation of statement 1.

3. Statement 1 is correct and statement 2 is incorrect

4. Both statements 1 and 2 are incorrect.

Q. Stomatal crypts are found in the leaf of

1. Nymphaea
2. Oleander
3. Sunflower
4. Maize

Q. Regarding assertion and reason, select the right option
Assertion[A]: Siberian Huskies prefer to live in very cold regions of the world
Reason[R]: Huskies have all the features and adaptations of animals seen in the tundra or polar ecosystem.

1. Both A and R are correct and R does not explain A.
2. Both A and R are correct and R explains A.
3. Both A and R are incorrect.
4. A is correct, R is incorrect.

Q. Stomata open at night and close during day time in

1. Halophytes
2. Hydrophytes
3. Succulent CAM plants
4. Mesophytes

Q. Stomata open at night in

1. Succulents
2. Xerophytes
3. Hydrophytes
4. Mesophytes

Q. Which of the following is a characteristic feature of a musk ox?

1. Snowy white skin
2. Small body and lesser surface area for skin
3. Long hollow hair on the body
4. All of these

Q. Main function of pedicellariae in Asterias is

1. Respiration
2. Capture of prey and removal of debris
3. Excretion
4. Digestion

Q. Sunken stomata occur in

1. Xerophytes
2. Hygrophytes
3. Hydrophytes
4. Mesophytes

Q. Regarding assertion and reason, select the right option
Assertion[A]: Siberian Huskies prefer to live in very cold regions of the world
Reason[R]: Huskies have all the features and adaptations of animals seen in the tundra or polar ecosystem.

1. Both A and R are correct and R explains A.
2. Both A and R are correct and R does not explain A.
3. Both A and R are incorrect.
4. A is correct, R is incorrect.