Tag: seed becomes plant

Questions Related to seed becomes plant

An albuminous seed which shows hypogeal germination is

evs seed becomes plant germination of seed seed germination journey of seed

  1. Castor

  2. Maize

  3. Gram

  4. Bean

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Correct Option: B
Explanation:
Hypogeal germination is the type of germination in which epicotyl which is the upper portion of the axis of the seedlings above the cotyledons elongates and cotyledons remain inside the soil. The examples are a pea, mango, maize, rice etc. In which maize has endosperm.
 So the correct option is 'Maize'.

Which of the following substances present in seed coats and cotyledons of seeds inhibit seed germination?

evs seed becomes plant germination of seed seed germination journey of seed

  1. Absicic acid

  2. Phenolic acid

  3. Ferulic acid

  4. All of the above

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Correct Option: D
Explanation:
  • Germination is the process by which an organism grows from a seed or similar structure. 
  • The most common example of germination is the sprouting of a seedling from a seed of an angiosperm or gymnosperm.substances present in seed coats and cotyledons of seeds inhibit seed germination are Abscisic acid, Phenolic acid and Ferulic acid. 
  • Abscisic acid (ABA) reversibly arrests embryo development at radicle, growth initiation, inhibiting the water uptake which accompanies embryo growth.
  • Hence,  substances present in seed coats and cotyledons of seeds inhibit seed germination is  Abscisic acid, Phenolic acid and Ferulic acid.
  • So, the correct answer is 'All of the above'.

Essential requirements of seed germination is ..........................

evs seed becomes plant germination of seed seed germination journey of seed

  1. Light and carbondioxide

  2. Water and oxygen

  3. Water and soil

  4. Microbes cold or hot treatment.

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Correct Option: B
Explanation:

At a basic level, seeds have three requirements to permit germination. These are:

  1. Water (during absorption and subsequent stages of growth).
  2. Oxygen (for respiration).
  3. Temperatures adequate for metabolism and growth.

All of the following statements about the role played by water in the growth of plants are true, except

evs seed becomes plant germination of seed seed germination journey of seed

  1. It is a solvent in which several substances are dissolved.

  2. It participates as a reagent in many reactions.

  3. It helps in the germination of seeds but does not provide turgidity to growing cells.

  4. It serves as the medium for transport of inorganic salts.

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Correct Option: C
Explanation:
Water, being the universal solvent helps in germination of seeds and provide turgidity to growing cells. Turgidity or turgidness, is caused by the osmotic flow of water from an area of low solute concentration outside of the cell into the cell's vacuole, which has a higher solute concentration. Healthy plant cells are turgid and plants rely on turgidity to maintain rigidity. 
Refer the picture for turgidity in plant cells.
Role of water in plant growth:
  • Primary component of photosynthesis and transpiration.
  • Turgor pressure (pressure to inflate cells and hold plant erect).
  • Solvent to move minerals from the soil up to the plant.
  • Solvent to move products of photosynthesis throughout the plant, including down to the root system.
  • Regulation of stomatal opening and closure, thus regulating transpiration and photosynthesis.
  • Source of pressure to move roots through the soil.
  • Medium for biochemical reactions.
Hence, the correct answer is option C.

Oxygen in the presence of enough moisture causes ____ to start. This creates ____ for the germination process.

evs seed becomes plant germination of seed seed germination journey of seed

  1. Respiration, energy

  2. Photosynthesis, energy

  3. development, growth

  4. photosynthesis, growth

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Correct Option: A
Explanation:

Oxygen is one of the factors that play an important role in the germination of seeds. Oxygen in the presence of enough moisture causes respiration to start. This creates energy for the germination process.

Which of the following is not an important condition needed for seeds to germinate?

evs seed becomes plant germination of seed seed germination journey of seed

  1. Temperature

  2. Water

  3. Light

  4. None of the above

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Correct Option: D
Explanation:

Germination may also be defined as protrusion of embryonic axis from the seed to resume growth. The external factors that affect seed germination are as follows:

(1) Temperature- The effect of temperature is primarily on the physiological processes going on within the seed during germination. Many seeds fail to germinate at lower temperature.
(2) Water- The first step in germination is the imbibition of water. It causes the seed to swell and facilitates bursting of the seed coat.

(3) Light- There are many seeds which respond to light for germination and these are said to be photoblastic. The quality of light also influences the rate of germination. 
Thus temperature, water, and light all are important conditions needed for seeds to germinate. Hence option D is the correct answer. 

Seasonal growth cycle of plants can be influenced by

evs seed becomes plant germination of seed seed germination journey of seed

  1. Temperature

  2. Amount of water

  3. Amount of daylight

  4. All of the above

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Correct Option: D
Explanation:
The growth cycle in plants shows seasonal variations. Plants are of various types such as annuals, biennials and perennials. Also, the vegetative and reproductive growth of plants depends upon factors such as temperature, water availability and the amount of day light they are exposed to. Accordingly, there are short day, long day and day neutral plants.
So, the correct answer is, 'All of the above'.

Most seeds go through ____ period before germination.

evs seed becomes plant germination of seed seed germination journey of seed

  1. Cold

  2. Hot

  3. Solid

  4. None of the above

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Correct Option: A
Explanation:

Most seeds go through a cold period before germination. Helps prevent seeds from sprouting as soon as they mature.

Deeply sown seeds do not germinate and do not come up over due to the deficiency of ...................

evs seed becomes plant germination of seed seed germination journey of seed

  1. Nutrients

  2. Water

  3. Oxygen

  4. Both B and C

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Correct Option: D
Explanation:

Soil is ploughed before seeds are sown. It is done to ensure the supply of oxygen in soil. Aerated soils can only support the growth of plants. Thus, if the seeds are sown deeply it will not germinate.

The most important external factor for seed germination is

evs seed becomes plant germination of seed seed germination journey of seed

  1. Light

  2. Soil

  3. Oxygen

  4. Water

Show answer
Correct Option: D
Explanation:

Water, air and suitable temperature are necessary for seed germination. Water is necesssary for germination because food is stored in the seeds in dry condition, but the developing embryo cannot utilize this dry food. Food can be utilized in liquid form only and seeds can utilize only dissolved oxygen. Excess water stops germination because once all the dissolved oxygen is utilised by the seed, further germination is not possible as the life supporting oxygen is now lacking. So, the correct answer is 'Water'.