Tag: introduction to plant organs and germination

Questions Related to introduction to plant organs and germination

Xenia was discovered by.

biology life within the seed developmental journey of seed introduction to plant organs and germination seed to plants

  1. Swingle

  2. Focke

  3. Guignard

  4. Amici

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Correct Option: B

A germinating mustard seed converts its lipids into sugars by _______________.

biology life within the seed developmental journey of seed introduction to plant organs and germination seed to plants

  1. TCA cycle

  2. Glyoxylate cycle

  3. Calvin cycle

  4. Glycotate pathway

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Correct Option: A

Which of the following processes involved are true of the germinating seed?
a. Imbibitions of water
b. Evolution of oxygen
c. Synthesis of enzymes
d. Emergence of radical
Select the correct answer using the codes given.

biology life within the seed developmental journey of seed introduction to plant organs and germination seed to plants

  1. $1, 2$ and $3$

  2. $1, 3$ and $4$

  3. $2, 3$ and $4$

  4. $1$ and $2$

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Correct Option: A

In the mature seed the persistent outer layer of nucleolus is called.

biology life within the seed developmental journey of seed introduction to plant organs and germination seed to plants

  1. Perisperm

  2. Caruncle

  3. Endostome

  4. Endothelium

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Correct Option: A

The alkaloid emetine is extracted from the.

biology life within the seed developmental journey of seed introduction to plant organs and germination seed to plants

  1. Seeds of Strychnos

  2. Roots of Aconitum

  3. Seeds of Datura

  4. Roots of Cephalous

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Correct Option: A

Which of the following statements about the hypocotyl hook is not true?

biology life within the seed developmental journey of seed introduction to plant organs and germination seed to plants

  1. It develops below the attachment of the cotyledons

  2. It is the first structure to emerge from a dicot seed

  3. It precedes the cotyledons and shoot apex up through the soil

  4. It straightens when exposed to light

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Correct Option: B
Explanation:

An embryo is a portion of a seed that grows into a plant. An embryo is a basic element that possesses enough potential for further growth and development. The part of a plant embryo or seedling that lies between the radicle and the cotyledons is the hypocotyl. Upon germination, the hypocotyl pushes the cotyledons above the ground to develop. It eventually becomes part of the plant stem. Most seed-bearing plants have hypocotyls.

So the correct option is 'It is the first structure to emerge from a dicot seed'.

After soaking the seeds overnight, these changes are seen in it 

biology life within the seed developmental journey of seed introduction to plant organs and germination seed to plants

  1. Stored food is digested to soluble form

  2. Physiological activity increases

  3. Imbibition of water occurs

  4. All of the above

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Correct Option: D
Explanation:

When seeds soaked in water, water gets absorbed with increasing its volume, the physiological activity the seed also increases along with the metabolic activities and the food gets digested.

So the correct option is 'All of the above.'

Freshly liberated seeds of Erianthus hiemalis do not germinate due to

biology life within the seed developmental journey of seed introduction to plant organs and germination seed to plants

  1. Occurrence of impermeable seed coat

  2. Immaturity of embryo

  3. Occurrence of inhibitors

  4. Absence of growth hormones

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Correct Option: B
Explanation:

Immaturity of embryo prevents germination of freshly liberated seeds of Erianthus hiemalis. 

So, the correct answer is 'Immaturity of embryo'

In a germinating seed, the roots develop from

biology life within the seed developmental journey of seed introduction to plant organs and germination seed to plants

  1. Radicle

  2. Plumule

  3. Tegmen

  4. Hilum

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Correct Option: A
Explanation:

The radicle is the first part of a seedling to emerge from the seed during the process of germination. It is the embryonic root of the plant and grows downward in the soil.

Hence, the correct answer is 'Radicle'.

Choose the correct answers from the alternatives given.
The following are requirement of seeds for germination to occur:

biology life within the seed developmental journey of seed introduction to plant organs and germination seed to plants

  1. oxygen for increased metabolism

  2. adequate temperature

  3. adequate water

  4. all of these

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Correct Option: D