Tag: developmental journey of seed

Quizzes (3) Questions (50)

Questions Related to developmental journey of seed

Multiple choice evs developmental journey of seed seed to plants germination of seeds life within the seed

Which of the following is the correct sequence of events happening during germination of a seed
1. The hypocotyl of the germinating seed elongates and pushes the cotyledon above ground
2. Seed absorbs water by wicking moisture through the seed coat into the seed
3.The exterior of the seed cracks open
4. The radicle emerges from the seed and forms into the root

  1. 1-3-4-2

  2. 1-2-4-3

  3. 2-3-4-1

  4. 2-3-1-4
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Initially, the seed absorbs water by wicking moisture through the seed coat into the seed itself. 
  • Moisture essentially brings the seed back to life. 
  • Once enough moisture has been absorbed by the seed, the exterior of the seed cracks open. 
  • At this point, the radicle emerges from the seed and forms into the root.
  • The hypocotyl, or stem of the germinating seed, elongates and pushes the the cotyledon above ground.
  • So the correct answer is' 2-3-4-1'
Multiple choice evs developmental journey of seed seed to plants germination of seeds life within the seed

Which one of the following events takes place after in angiosperms are _______________.

  1. The pollen grain germinates on the stigma

  2. The pollen tubes enter the embryo sac

  3. Two male gametes are discharged into the embryo sac

  4. The PEN(Primary Endosperm Nucleus) develops into endosperm
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Options (a), (b) and (c) represent the events that take place before fertilisation. Primary endosperm nucleus (PEN) is formed after double fertilisation and develops into endosperm.

Multiple choice evs developmental journey of seed seed to plants germination of seeds life within the seed

Which of the following remained unchanged for last many million years?

  1. Pinus

  2. Rice

  3. Acacia

  4. Ginkgo
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ginkgo biloba, or maidenhair tree, has been described as a living fossil, because it is the sole survivor of an ancient group of trees older than the dinosaurs. 

The Ginkgo is an oddity in nature because it is a single species with no known living relatives; a living fossil that has been essentially unchanged for more than 200 million years. 
Ginkgo biloba has been used in Chinese traditional medicine for centuries. The leaves are used in herbal remedies for cognitive complaints, such as alzheimers disease, dementia and vertigo. The phytochemistry and bioactivity of it, have been the subject of extensive research.

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

The chemical used for treating the dormancy of seed is?

  1. TTC

  2. G A

  3. I B A

  4. Methyl red
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

TTC (2,3,5-triphenyl tetrazolium chloride) is a chemical used to test seed viability by staining living tissues red. While GA (gibberellic acid) is used to break dormancy, TTC is the standard chemical reagent associated with seed testing protocols.

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

In wheat and rice _________________.

  1. Per carp is fused with seed coat

  2. Per sperm is fused with seed coat

  3. Seed coat and per carp are separate

  4. Fruits are multisided
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In cereals like wheat and rice, the fruit is a caryopsis, where the pericarp (fruit wall) is fused with the seed coat (testa). This makes the grain a single-seeded fruit.

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

Sprouting time of seeds may vary according to 

  1. Temperature

  2. Humidity of the weather

  3. Air force

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Sprouting time of seeds may vary according to the temperature and humidity of the weather. Some seeds are hard to germinate when the weather is hot. Sometimes the temperature is just too high for that seed, sometimes the soil dries out too fast. Some varieties of some crops have better germination at high temperatures than others.

So, the correct answer is 'Both A and B'.