Tag: life within the seed

Questions Related to life within the seed

'Tropane' is obtained from ____________.

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

  1. Daucus carota

  2. Catharanthus roseus

  3. Datura Stramoneum

  4. Mentha piperata

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Correct Option: A

Put a tick mark against the correct alternative in the following statements :
Peas, gram, etc. are grown as rotation crops because

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

  1. they are cheap

  2. they maintain soil fertility by converting soil nitrogen into nitrates

  3. provide pulses

  4. they do not require irrigation.

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Correct Option: A

Which one of the following is not a category?

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

  1. Phylum

  2. Species

  3. Class

  4. Glumaceae

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Correct Option: D
Explanation:

Phylum, Species, and Class are taxonomic category. But, Glumaceae is not a category. It is a botanical name assigned to order including the family of grass, used by Bentham and Hooker. So, the correct answer is (D).

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

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

  1. 1-3-4-2

  2. 1-2-4-3

  3. 2-3-4-1

  4. 2-3-1-4

Show answer
Correct Option: C
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'

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

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

  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

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Correct Option: D
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.

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

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

  1. Pinus

  2. Rice

  3. Acacia

  4. Ginkgo

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Correct Option: D
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.

The chemical used for treating the dormancy of seed is?

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

  1. TTC

  2. G A

  3. I B A

  4. Methyl red

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Correct Option: A

In wheat and rice _________________.

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

  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

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Correct Option: A

Sprouting time of seeds may vary according to 

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

  1. Temperature

  2. Humidity of the weather

  3. Air force

  4. Both A and B

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Correct Option: D
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'.

Glycolate is converted into glyoxylate in the ___________.

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

  1. Glyoxomes

  2. Microtubules

  3. Peroximoses

  4. Golgi bodies

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Correct Option: A