Tag: importance and classification of angiosperms

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

Dry scales of onion possess in their cells

  1. Raphides

  2. Prismatic crystals

  3. Sphaeraphides

  4. Crystal sand
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.

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

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

  1. Salvadora indica

  2. Calotropis procera

  3. Saccharum munja

  4. Saccharum spontaneum
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Salvadora indica is a halophyte or salt-tolerant shrub, not typically classified as a sand binder. Calotropis procera, Saccharum munja, and Saccharum spontaneum are well-known sand-binding plants used for soil stabilization in arid and semi-arid regions.

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

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

  1. Sonneratia acida

  2. Anaardium occidentale

  3. Taxus baccata

  4. Gnetum gemon
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sonneratia acida is a mangrove species, which are plants specifically adapted to highly saline, waterlogged coastal environments. The other options are terrestrial plants not adapted to such conditions.

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

Which one of the following is the earliest land plant?

  1. Rhynia

  2. Homea

  3. Cordite's

  4. Cook Sonia
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Rhynia is a genus of extinct vascular plants from the Early Devonian period, representing some of the earliest land plants. It lacked true roots and leaves, consisting only of simple stems with vascular tissue. The other options appear to be garbled or misspelled names that don't represent early land plant groups.

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

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.

  1. $1, 2$ and $3$
  2. $1$ and $2$
  3. $1$ and $3$
  4. $2$ and $3$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sociophytes (shade-loving), Heliophytes (sun-loving), and Psammophytes (sand-loving) are all correctly matched with their respective habitat preferences.

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

Which one is concerned with the temporary adaptation ?

  1. Phytomelanin

  2. Melanin

  3. Tannin

  4. Anthocyanin
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Phytomelanin is a dark, carbon-rich pigment layer found in the pericarp of certain plants (like Asteraceae seeds), which serves as a temporary protective adaptation against environmental stress or predation. The other options are permanent biochemical components.

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

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

  1. Precambrian

  2. Permian

  3. Silurian

  4. Carboniferous
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The first fossil evidence of land plants, such as vascular plants like Cooksonia, dates back to the Silurian period of the Paleozoic era.

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

Finely dissected leaf may be an adaptation of

  1. xerophytes

  2. psammophytes

  3. halophytes

  4. hydrophytes
Reveal answer Fill a bubble to check yourself
D Correct answer
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 ".

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

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

  1. Suhabool, Teak, Eucalyptus, mango

  2. Baman, Acacia, Ziziphus, teak

  3. Safflower, eucalyptus, asparagus, acacia

  4. Acacia, prosopis, ziziphus, opuntia
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Xerophytes are plants adapted to survive in environments with little liquid water. Acacia, Prosopis, Ziziphus, and Opuntia are classic examples of xerophytic plants found in arid or desert regions.

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

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.  

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

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

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

  4. (i), (ii), (iii) and (v)
Reveal answer Fill a bubble to check yourself
D Correct answer
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)'.