Tag: leaves

Questions Related to leaves

The ability of the Venus Flytrap to capture insects is due to

evs seeds and seeds plant adaptation and modification leaves leaf modification

  1. Specialized "muscle-like" cells

  2. Chemical stimulation by the prey

  3. A passive process requiring no special ability on the part of the plant

  4. Rapid turgor pressure changes

Show answer
Correct Option: D
Explanation:

Venus Flytrap is an insectivorous plant. It grows in waterlogged soils. Due to waterlogging, the amount of available nitrogen is very less. Hence, it obtains its nitrogen from the insects. Due to this reason, it is also called as the semi-autotrophic or semi-heterotrophic plant. It has leaves with winged petiole attached to it and lamina is modified into two toothed jaws. Each jaw has numerous teeth. Also, the upper surface of each jaw has long sensitive bristles. The upper surface also contains irregularly scattered glands. These bristles are very sensitive to touch stimulus. When an insect comes in contact with these bristles, there is a rapid change in the turgor pressure. This results in the closing of leaf and the insect are captured. 

Thus, the correct answer is 'Rapid turgor pressure changes.'

All of the following parts of the plant is present in pitcher plant except.

evs seeds and seeds plant adaptation and modification leaves leaf modification

  1. Leaves

  2. Roots

  3. Stem

  4. Seeds

Show answer
Correct Option: A
Explanation:

  • Pitcher plants are the several different carnivorous plants. These have modified leaves known as pitfall traps. 
  • These are having a prey-trapping mechanism. 
  • The traps of are true in pitcher plants and are formed by the specialized leaves.
  • So, we can say that pitcher plants don’t have leaves.
  • The correct option is A.  

Insectivorous plants are _________.

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  1. Saprophytes

  2. Heterotrophs

  3. Semiautotrophs

  4. Autotrophs

Show answer
Correct Option: C
Explanation:

Autotrophs plants are those which gets nutrients through photosynthesis in the presence of sunlight. Insectivorous plants just like almost every other plant, get their energy from sunlight. They feed on insect to fufill their nitrogen requirement, that's why they can easily grown in nitrogen deficient soil condition.

Which of the following plant traps insect for nutrients?

evs seeds and seeds plant adaptation and modification leaves leaf modification

  1. Lotus

  2. Pitcher

  3. Rose

  4. Tulip

Show answer
Correct Option: B
Explanation:
Plants that eat insects are called insectivorous plants. They have adapted to grow in places where the soil is thin or poor in nutrients, especially nitrogen. Pitcher plant is the example of an insectivorous plant. In pitcher plant, the leaf is modified to form a pitcher-like structure with several hair-like structures inside it. When an insect sits on the pitcher of the plant, the lid closes and the insect gets trapped inside the pitcher.
So, the answer is B.

Which is not an insectivorous plant?

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  1. Dionaea

  2. Dischidia$/$Monotropa

  3. Drosera

  4. Pinguicula

Show answer
Correct Option: B
Explanation:
$\to$ Dischidia / Monotropa. 
$\to$ Monotropa is a genus of 5 species of herbaceous perennial flowering plants, formly classified in the family Monotropaceae, but now included with most the Ericaceae. 
$\bullet$ unlike most of the plants, they do not contain chlorophyll.
$\bullet$ They are myco - heterotrophs, getting their food through parasitism upon fungi rather than synthesis.
$\bullet$ Thus, they are capable of living in very dark conditions.

In which type of soil pitcher plants can grow?

evs seeds and seeds plant adaptation and modification leaves leaf modification

  1. Phosphorus deficient soil

  2. Potassium deficient soil

  3. Nitrogen deficient soil

  4. None of the above

Show answer
Correct Option: C
Explanation:

Carnivorous plants like pitcher plants are having a trapping mechanism designed to catch and digest insects. They do this to obtain the nutrients not found in the soil. They derive nitrogen from the prey they trap and thus they can grow in nitrogen-deficient soil.

The correct option is C. 

Which part of the Nepenthes is modified into a pitcher?

evs seeds and seeds plant adaptation and modification leaves leaf modification

  1. Leaf

  2. Stem

  3. Root

  4. None of the above

Show answer
Correct Option: A
Explanation:
Pitcher plants or Nepenthes is a carnivorous plant that has modified leaves to form a pitcher which traps its prey or insect for consumption as they live in Nitrogen deficient soil.
So, the correct answer is 'Leaf'

Pitcher plant can grow in nitrogen deficient soil.

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  1. True

  2. False

Show answer
Correct Option: A
Explanation:

A) Carnivorous plants like pitcher plant have a trapping mechanism designed to catch and digest insects. They do this in order to obtain nutrients not found in the soil. They derive nitrogen from the prey they trap and hence, can grow in nitrogen deficient soil.

B) Pitcher plants can grow in nitrogen deficient soil.
So the correct answer is 'True'.

Golgi apparatus (a) Transports and modifies materials (b) Secretes mucin in respiratory tract (c) Secretes slime in insectivorous plants. What is correct

evs seeds and seeds plant adaptation and modification leaves leaf modification

  1. Wrong-a, correct-b and c

  2. Wrong-b, correct-a and c

  3. Wrong-b and c, correct-a

  4. Wrong-nil, correct-all.

Show answer
Correct Option: D

Which one of the following is not an insectivorous plant?

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  1. Monotropa

  2. Drosera

  3. Utricularia

  4. Nepenthes

Show answer
Correct Option: A
Explanation:

Monotropa is not an insectivorous plant but is a saprophytic plant because it feeds by soaking up necessary nutrients from surrounding decaying plant matter. The other given plants are examples of insectivorous plants

So, the correct option is 'Monotropa'.