Tag: importance and classification of angiosperms

Questions Related to importance and classification of angiosperms

Dry scales of onion possess in their cells

botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms

  1. Raphides

  2. Prismatic crystals

  3. Sphaeraphides

  4. Crystal sand

Show answer
Correct Option: B
Explanation:

A. Calcium oxalate crystals occur in the form of needle-shaped in few plant cells and are called raphides.

  • Eg- Water hyacinth.

B. Calcium oxalate in the form of rod-like or cubicle shaped in few plant cells and are called prismatic crystals.

  • Eg- dry scales of onions.

C. Calcium oxalate crystals occur in the form of star-shape in plant cells and are called sphaeraphides.

  • Eg- phylloclades of Colocasia.

D. Calcium oxalate is deposited in the leaves within the vacuoles during early developmental stages in plants is called crystal sand. Eg- Beet root

So, the correct answer is 'Prismatic crystals'.

Which one of the following plant species is NOT a sand binder in the semi arid region?

botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

  1. Salvadora indica

  2. Calotropis procera

  3. Saccharum munja

  4. Saccharum spontaneum

Show answer
Correct Option: A

Which one of the following is an example of a plant adapted to highly saline coastal conditions?

botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

  1. Sonneratia acida

  2. Anaardium occidentale

  3. Taxus baccata

  4. Gnetum gemon

Show answer
Correct Option: A

Which one of the following is the earliest land plant?

botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms

  1. Rhynia

  2. Homea

  3. Cordite's

  4. Cook Sonia

Show answer
Correct Option: A

Which of the following pairs of plant categories and habitat types are correctly matched?
a. Sociophytes- Shady
b. Heliophytes - Sunny
c. Psammophytes - Sandy
Select the correct answer using the codes given.

botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

  1. $1, 2$ and $3$

  2. $1$ and $2$

  3. $1$ and $3$

  4. $2$ and $3$

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Correct Option: A

Which one is concerned with the temporary adaptation ?

botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

  1. Phytomelanin

  2. Melanin

  3. Tannin

  4. Anthocyanin

Show answer
Correct Option: A

In which one of the following geological periods did the first land plants appear?

botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

  1. Precambrian

  2. Permian

  3. Silurian

  4. Carboniferous

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Correct Option: A

Finely dissected leaf may be an adaptation of

botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

  1. xerophytes

  2. psammophytes

  3. halophytes

  4. hydrophytes

Show answer
Correct Option: D
Explanation:

Many hydrophytes have production of different forms of leaves in the same plant i.e., heterophylly. In submerged aquatics with free-floating aerial leaves, the submerged leaves are generally linear, ribbon-shaped or finely dissected while the aerial leaves are complete and rounded or lobed.


So, the correct answer is " hydrophytes ".

Which one of the following sets consists only of xerophytes plants?

botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

  1. Suhabool, Teak, Eucalyptus, mango

  2. Baman, Acacia, Ziziphus, teak

  3. Safflower, eucalyptus, asparagus, acacia

  4. Acacia, prosopis, ziziphus, opuntia

Show answer
Correct Option: A

Read the following statements about adaptations in desert plants and select the correct ones. 
(i) They have a thick cuticle on their leaf surface 
(ii) They have stomata present in deep sunken pits. 
(iii) They use CAM pathway for photosynthesis.
(iv) They have flattened stems and large sized leaves.
(v) Their stomata remain closed during the day.  

botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms

  1. (i), (ii) and (iii)

  2. (ii), (iii) and (v)

  3. (i), (ii) and (iv)

  4. (i), (ii), (iii) and (v)

Show answer
Correct Option: D
Explanation:
Xerophytes can withstand a prolonged period of drought, for this purpose they have certain peculiar adaptations. Thick cuticle is present in these plants. Stomata are generally sunken (deep seated) and open during night only. They have CAM pathway for photosynthesis. Leaves are generally small and scaly. Sometimes leaves are modified into spines to reduce water loss through transpiration.They generally have an extensive root system and a smaller shoot system.Stems may be modified to phylloclades or dadoes to carry out the function of photosynthesis.
So, the correct answer is '(i), (ii), (iii) and (v)'.