Tag: plant adaptation and modification

Questions Related to plant adaptation and modification

Aldrovanda is

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

  1. Fly catcher plant

  2. Water flea trap

  3. Devil's foot

  4. None of these

Show answer
Correct Option: B
Explanation:

Aldrovanda vesiculosa, also famous as the waterwheel plant. This plant captures small aquatic invertebrates using water flea traps. The traps are arranged in spirals around a central, free-floating stem. This is one of the rare plant species capable of rapid movement.

So option B is correct.

Which modified leaf prevents transpiration?

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

  1. Tendril

  2. Spine

  3. Pitcher

  4. None of the above

Show answer
Correct Option: B
Explanation:

A) Tendrils are the modification of leaves that help climbers to climb the support.

C) Spine is the modified structure of entire leaf or part of it that prevent transpiration is xerophytes.
C) Leaf pitcher is the modification of leaf in Nepenthes which takes part in catching and digesting small animals .
So, the correct option is 'Spine'

In which plant, leaves are modified due to the deficiency of nitrogen in the soil?

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

  1. Pea

  2. Snake gourd

  3. Cactus

  4. Nepenthes

Show answer
Correct Option: D
Explanation:

Leaf pitcher is found in Nepenthes is a modified leaf which is converted into a lid to capture small insects and digest it to overcome nitrogen deficiency.

So, the correct option is 'Nepenthes'.

In which of the following plant, leaves are modified into the wiry coiled structure?

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

  1. Opuntia

  2. Potato

  3. Pea

  4. Snake gourd

Show answer
Correct Option: C
Explanation:

Leaves of some plant get modify to form tendrils. These are thin, wiry, and spirally coiled. It holds the support by coiling around it and help the weak stem to climb the support.

Ex-pea, sweet pea and $Glariosa$.
So the correct option is 'Pea'

Which of the following leaves are modified to fulfill their nitrogen deficiency?

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

  1. Onion

  2. Opuntia

  3. Nepenthes

  4. Utricularia

Show answer
Correct Option: C
Explanation:

  1. Onion leaves are modified to store food and water called scale leaves.
  2. Opuntia or prickly pear leaves modified into spines for defensive purpose.
  3. Nepenthes leaves are modified into leaf-pitcher to trap insects so that they fulfill their nitrogen deficiency.
  4. Utricularia is an insectivorous plant that grows in water and their leaves get modified to leaf-bladder for digesting insects.
So the correct option is 'Nepenthes'

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

Show answer
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

Show answer
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

Show answer
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).