Tag: leaf modification

Questions Related to leaf modification

Which is not an insectivorous plant?

evs seeds and seeds plant adaptation and modification leaves leaf modification

  1. Dionaea

  2. Dischidia$/$Monotropa

  3. Drosera

  4. Pinguicula

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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

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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

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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.

evs seeds and seeds plant adaptation and modification leaves leaf modification

  1. True

  2. False

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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.

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Correct Option: D

Which one of the following is not an insectivorous plant?

evs seeds and seeds plant adaptation and modification leaves leaf modification

  1. Monotropa

  2. Drosera

  3. Utricularia

  4. Nepenthes

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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'.

In a diploid plant with $2n=14$, all the chromosomes form a ring structure during meiotic prophase. The reason for this is?

evs seeds and seeds plant adaptation and modification leaves leaf modification

  1. Multiple deletions

  2. Gene mutations

  3. Duplications

  4. Multiple reciprocal translocations

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Correct Option: A
Consider the following plants.
a. Darlingtonia
b. Dionaea
c. Sarracenia
Which of the plants is/are carnivorous?
evs seeds and seeds plant adaptation and modification leaves leaf modification

  1. $1$ only

  2. $1$ and $2$ only

  3. $2$ and $3$ only

  4. $1, 2$ and $3$

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Correct Option: A

Insectivorous plants trap insects to 

evs seeds and seeds plant adaptation and modification leaves leaf modification

  1. Meet their potassium requirements

  2. Meet their nitrogen requirements

  3. Meet their phosphorous requirements

  4. Meet their oxygen requirements

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Correct Option: B
Explanation:

Insectivorous plants trap and digest insects and other small animals to obtain the nitrogen that is required for their growth. Most plants absorb enough nitrogen from nitrates in the soil but as the insectivorous plants live in nitrate-deficient bogs, they need to fulfill their nitrogen demand by digesting the prey instead. 

So the correct option is 'Meet their Nitrogen requirements'

Insectivorous plants such as Venus fly trap catch and digit insects in order to supplement the deficiency of.

evs seeds and seeds plant adaptation and modification leaves leaf modification

  1. sulphur

  2. nitrogen

  3. potassium

  4. phosphorus

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Correct Option: B