Tag: developmental journey of seed

Quizzes (3) Questions (50)

Questions Related to developmental journey of seed

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

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

  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
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.

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

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

  1. Stored food is digested to soluble form

  2. Physiological activity increases

  3. Imbibition of water occurs

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
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.'

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

Freshly liberated seeds of Erianthus hiemalis do not germinate due to

  1. Occurrence of impermeable seed coat

  2. Immaturity of embryo

  3. Occurrence of inhibitors

  4. Absence of growth hormones
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

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

So, the correct answer is 'Immaturity of embryo'

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

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

  1. oxygen for increased metabolism

  2. adequate temperature

  3. adequate water

  4. all of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Seed germination requires oxygen for cellular respiration, an adequate temperature for enzymatic activity, and water for metabolic activation and imbibition.

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

Choose the correct answer from the alternatives given.
A nail was driven into the trunk of a tree at a point 1.5 meters above the soil level. After three years, the nail will

  1. remain where it was

  2. move side ways

  3. move up

  4. move down
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Trees grow in height from the apical meristems located at the tips of branches and the main stem. A nail driven into the trunk will remain at the same height as the tree grows in girth, not in height, at that specific point.