Tag: roots and leaves

Quizzes (7) Questions (35)

Questions Related to roots and leaves

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

Leaf tip tendrils are present in

  1. Smilax

  2. Lathyrus

  3. Pisum

  4. Gloriosa
Reveal answer Fill a bubble to check yourself
D Correct answer
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 " .
Multiple choice evs roots and leaves plant adaptation and modification leaves leaf modification root, stem, and leaves

Spines present on the areoles of Opuntia represent

  1. stem

  2. leaves

  3. buds

  4. phyllodes
Reveal answer Fill a bubble to check yourself
B Correct answer
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".

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

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

  1. I only

  2. I and II only

  3. II only

  4. I and III only
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.
Multiple choice evs roots and leaves plant adaptation and modification leaves leaf modification root, stem, and leaves

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

  1. Photosynthesis

  2. leaf fall

  3. Leaf movement

  4. Transpiration
Reveal answer Fill a bubble to check yourself
C Correct answer
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).

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

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

  1. Leaf tendrils and stem spines

  2. Leaf spines

  3. Stem thorns

  4. Both stem thorns as well as leaf spines
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

The primary function of leaf is ________.

  1. Growth

  2. Reproduction

  3. Photosynthesis

  4. Protection
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.