Tag: evs

Questions Related to evs

A gas required for germination of (pea) seed is

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

  1. Nitrogen

  2. Oxygen

  3. Hydrogen

  4. Water vapours

Show answer
Correct Option: B
Explanation:

Air (oxygen) is necessary for seed germination (pea seed). During germination rapid cell division takes place. Energy is required for cell division. This energy is obtained from oxidation. The oxygen required for oxidation is supplied by the air. So, air is necessary for seed germination. So, the correct answer is ‘Oxygen’.

Which is not essential for seed germination in most cases?

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

  1. Oxygen

  2. Light

  3. Suitable temperature

  4. Moisture

Show answer
Correct Option: B
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. During germination rapid cell division takes place. Energy is required for cell division. This energy is obtained from oxidation. The oxygen required for oxidation is supplied by the air. So, air is necessary for seed germination. Suitable temperature is necessary because low temperature retards the embryo activity and high temperature destroys the delicate embryo tissue. So, the correct answer is 'Light'.

Essential requirement for seed germination is

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

  1. ${O} _{2}$ and light

  2. ${H} _{2}O$ and ${O} _{2}$

  3. ${H} _{2}O$ and high temperature

  4. Scarification and vernalisation

Show answer
Correct Option: B
Explanation:

The process of seed germination depends on many factors like temperature, water, oxygen and sometime light. Seeds usually germinate within a wide temperature range. Hence, essential requirement for seed germination to take place is water and oxygen. Germination cannot take place without sufficient supply of water. In presence of sufficient moisture, water is taken up by seed. Oxygen is essential for aerobic respiration. 

Thus, the correct answer is option B.

Movement stimulated by external factor is

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

  1. Spontaneous movement

  2. Autonomic movement

  3. Physical movement

  4. Paratonic movement

Show answer
Correct Option: D
Explanation:

Autonomic movement is the spontaneous movement of the protoplasm seen in aquatic plants due to internal stimulus. It is not related to the external stimulus. Movement of cilia and flagella is an example of autonomic movement. A movement shown by a plant part in response to an external factor is called as paratonic movement. In this, the direction of movement is controlled by the direction of the stimulus. 

Thus, the correct answer is option D.

Seeds which do not germinate in the dark are called as

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

  1. Positive photoblastic

  2. Negative photoblastic

  3. Non-photoblastic

  4. None of the aboove

Show answer
Correct Option: A
Explanation:

Positive photoblastic seeds require white light to germinate in dark the growth does not occur. this response is controlled by phytochromes and includes the plants like mango, wheat etc.

So the correct option is 'Positive photoblastic'.

During the germination of pulse seeds, the major food reserves are degraded by the activity of __________.

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

  1. Amylase

  2. Lipase

  3. Protease

  4. Cellulose

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Correct Option: A

The period of rapid starch formation and decrease in sugar in developing seeds is associated with a marked increase in.

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

  1. Phosphorylase

  2. Phosphates

  3. Alpha amylase

  4. Hexokinase

Show answer
Correct Option: A

Match List I(Type/condition of germination) with List II(Seeds of) and select the correct answer using the codes given the lists.

List-I List-II
a. Positively photoelectric $1$. Rice
b. Non-photoelectric $2$. Lettuce
c. Possible under anaerobic conditions $3$. Cucumber
d. Requires acid scarification $4$. Leucaena


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

  1. A-$2$, B-$3$, C-$4$, D-$1$

  2. A-$2$, B-$3$, C-$1$, D-$4$

  3. A-$3$, B-$2$, C-$1$, D-$4$

  4. A-$3$, B-$2$, C-$4$, D-$1$

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Correct Option: A

During the development of a seed, if the mechanical layer differentiates from the outer epidermis of the outer integument, then the seed is said to be.

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

  1. Exotegmic

  2. Mesotestal

  3. Endotogmic

  4. Exotestal

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Correct Option: A

Vivipary may be described as

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

  1. Germination of seed with cotyledons above the soil

  2. Germination of seed with cotyledons under the soil

  3. Formation of a fruit without pollination

  4. Development of a seedling within an attached fruit

Show answer
Correct Option: D
Explanation:

Vivipary is a condition where the embryo derives nutrition from the parent and is attached it attains maturity. In plants, vivipary refers to the development of a seedling within an attached fruit so that the seedling can derive nutrition.

So, the correct answer is 'Development of a seedling within an attached fruit'