Tag: roots and leaves

Questions Related to roots and leaves

Leaf tip tendrils are present in

evs roots and leaves plant adaptation and modification leaves leaf modification root, stem, and leaves

  1. Smilax

  2. Lathyrus

  3. Pisum

  4. Gloriosa

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Correct Option: D
Explanation:
Leaf tendrils: In weak-stemmed plants, leaf or a part of leaf gets modified into tendrils i.e., a green coiled threadlike structure which helps in climbing around the support. Gloriosa or Glory Lily has leaf tip modified into tendrils. It is also a type of leaf tendrils.
So,the correct answer is " Gloriosa " .

Spines present on the areoles of Opuntia represent

evs roots and leaves plant adaptation and modification leaves leaf modification root, stem, and leaves

  1. stem

  2. leaves

  3. buds

  4. phyllodes

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Correct Option: B
Explanation:

Areoles are the evolutionary modification in the cacti. These modifications give rise to spines and glochids which are the means of self-defense. These spines effectively cover the cacti. These evolved as abortive branch buds while their spines evolved as vestigial leaves.

So, the correct answer is " leaves".

Which of the following plants parts in garlic onion are edible?

evs roots and leaves plant adaptation and modification leaves leaf modification root, stem, and leaves

  1. Underground stem

  2. Fleshy scale leaves

  3. Tunic

  4. Adventitious roots

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Correct Option: B
Explanation:

'Fleshy scale leaves' in garlic and onion are edible plant parts.

So the correct answer is 'Fleshy scaly leaves'.

Phyllodes are seen in
I) Nepenthes 
II) Australian acacia
III) Opuntia

evs roots and leaves plant adaptation and modification leaves leaf modification root, stem, and leaves

  1. I only

  2. I and II only

  3. II only

  4. I and III only

Show answer
Correct Option: C
Explanation:
Phyllodes are formed when petioles of some plants become flattened and widened. The petiole of Australian acacia is changed to a planed, leaf-like structure which turns green in color showing photosynthesis. Thus, phyllodes are found in Australian acacia.

So, the correct answer is 'II only'.

The pulvinus in 'Touch-me-not plant' plays an important role in

evs roots and leaves plant adaptation and modification leaves leaf modification root, stem, and leaves

  1. Photosynthesis

  2. leaf fall

  3. Leaf movement

  4. Transpiration

Show answer
Correct Option: C
Explanation:

The leaves close under various other stimuli, such as touching, warming, blowing, or shaking. ... The stimulus can also be transmitted to neighboring leaves. It is not known exactly why Mimosa pudica evolved this trait, but many scientists think that the plant uses its ability to shrink as a defense from herbivores. So, the correct option is "C" (Leaf movement).

In Duranta, axillary buds and in Carrisa the apical bud is modified into stem thorns, what is correct for Ulex? It has 

evs roots and leaves plant adaptation and modification leaves leaf modification root, stem, and leaves

  1. Leaf tendrils and stem spines

  2. Leaf spines

  3. Stem thorns

  4. Both stem thorns as well as leaf spines

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Correct Option: D
Explanation:

In Duranta, axillary buds and in Carrisa the apical bud is modified into stem thorns, for ulex both stem thorns as well as leaf spines are modified.
Hence, option D is correct.

Hardest leaves are found in?

evs roots and leaves leaves root, stem, and leaves basics of roots and stem plant adaptation and modification

  1. Victoria regia

  2. Rafflesia

  3. Raphia vinifera

  4. Metasequoia

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Correct Option: A

The primary function of leaf is ________.

evs roots and leaves leaves root, stem, and leaves basics of roots and stem plant adaptation and modification

  1. Growth

  2. Reproduction

  3. Photosynthesis

  4. Protection

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Correct Option: C
Explanation:

Leaves are those parts of plants that perform the primary function of photosynthesis and transpiration. Growth, Reproduction and Protection are it's secondary or modified functions.

So, the correct option is 'Photosynthesis'.

The petiole is also known as _________.

evs roots and leaves leaves root, stem, and leaves basics of roots and stem plant adaptation and modification

  1. Peduncle

  2. Hypopodium

  3. Mesopodium

  4. Epipodium

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Correct Option: C
Explanation:
The petiole also called the mesopodium is a cylindrical or sub-cylindrical smooth or grooved stalk of the leaf which lifts the lamina above the level of the stem. 
So, the correct option is 'Mesopodium'.

________ is taken as leaf cutting in Peperomia.

evs roots and leaves leaves root, stem, and leaves basics of roots and stem plant adaptation and modification

  1. Only Leaf petiole

  2. Part of the leaf

  3. Entire leaf including petiole

  4. Leaf blade

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Correct Option: C