Tag: evs

Quizzes (439) Questions (4580)

Questions Related to evs

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

The species of Tilletia responsible for hill bunt or stinking smut of wheat are __________________.

  1. Tilletia caries and T. Foetida

  2. Tilletia caries and T. Barclayana

  3. Tilletia contraversa and T. Caries

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Tilletia caries and T. foetida are the primary fungal species responsible for causing common bunt or stinking smut in wheat.

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

A minimum number of meiotic divisions required to produce $50$ seeds of an angiosperm is?

  1. $13$
  2. $26$
  3. $50$
  4. $63$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

To produce 50 seeds, 50 functional megaspores and 50 male gametes are needed. Each female seed requires 1 meiotic division for the megaspore mother cell, and each pollen grain tetrad requires 1 meiotic division for 4 microspores (meaning 50/4 = 12.5, so 13 pollen mother cell meiotic divisions). Total divisions = 50 + 13 = 63.

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

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

  1. they are cheap

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

  3. provide pulses

  4. they do not require irrigation.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Leguminous crops like peas and gram harbor nitrogen-fixing bacteria in their root nodules, which convert atmospheric nitrogen into usable nitrates, thereby enriching and maintaining soil fertility during crop rotation.

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 sources of water water as nutrient basics of water pollution nutrients and deficiency

The pipes which carry the waste waters from the houses is known as

  1. Waste lines

  2. Drainage lines

  3. Water lines

  4. Wastewater lines
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Drainage lines are artificial passageway used to carry the waste water from the houses. It then carries the waste water to the municipal sewage system where it is treated before discharging in water body. Water lines are artificial passageway used to carry the water to the houses.  

Thus, the correct answer is option B.