Biology · Environmental Studies

Plant Reproduction and Germination

835 Questions

Plant reproduction and germination involve seed structure, cotyledon function, and dispersal mechanisms. These core botany concepts frequently appear in general science sections. Practice these questions to ensure better retention.

Seed germination typesSeed dispersal mechanismsCotyledons and albuminous seedsCryptogamic plantsPhanerogams reproduction

Plant Reproduction and Germination Questions

Multiple choice evs seed becomes plant germination of seed seed germination journey of seed

A gas required for germination of (pea) seed is

  1. Nitrogen

  2. Oxygen

  3. Hydrogen

  4. Water vapours
Reveal answer Fill a bubble to check yourself
B Correct answer
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’.

Multiple choice evs seed becomes plant germination of seed seed germination journey of seed

Which is not essential for seed germination in most cases?

  1. Oxygen

  2. Light

  3. Suitable temperature

  4. Moisture
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.

Multiple choice evs seed becomes plant germination of seed seed germination journey of seed

Essential requirement for seed germination is

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

  4. Scarification and vernalisation
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

Multiple choice evs seed becomes plant germination of seed seed germination journey of seed

Seeds which do not germinate in the dark are called as

  1. Positive photoblastic

  2. Negative photoblastic

  3. Non-photoblastic

  4. None of the aboove
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

Multiple choice evs seed becomes plant germination of seed seed germination journey of seed

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

  1. Amylase

  2. Lipase

  3. Protease

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

Pulse seeds are rich in starch. During germination, the enzyme amylase breaks down these starch reserves into simpler sugars to provide energy for the growing embryo.

Multiple choice evs seed becomes plant germination of seed seed germination journey of seed

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

  1. Phosphorylase

  2. Phosphates

  3. Alpha amylase

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

Phosphorylase is the enzyme responsible for the reversible conversion of starch to glucose-1-phosphate, playing a key role in starch synthesis and degradation in developing seeds.

Multiple choice evs seed becomes plant germination of seed seed germination journey of seed

Vivipary may be described as

  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
Reveal answer Fill a bubble to check yourself
D Correct answer
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'

Multiple choice evs seed becomes plant germination of seed seed germination journey of seed
The three conditions necessary for germination of seeds are 

  1. Oxygen, suitable temperature and water

  2. Good soil, suitable temperature and light

  3. Good soil, Water and Air

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All seeds need water, oxygen, and proper temperature in order to germinate. Some seeds require proper light also. Some germinate better in full light while others require darkness to germinate. When a seed is exposed to the proper conditions, water and oxygen are taken in through the seed coat. 

Hence, the correct answer is 'All of the above'

Multiple choice evs seed becomes plant germination of seed seed germination journey of seed

Select the correct option:


The respiration in germinating seeds produces energy which can be detected in the form of ___________.

  1. Water

  2. Heat

  3. Oxygen
  4. ${CO} _{2}$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
During germination, the respiration rate of seed is very high which releases a very high amount of energy and around 30 to 40% of energy is converted into ATP and utilize by the plant for its growth and rest is evolved in the form of heat which can be detected.
So the correct option is 'Heat'.
Multiple choice evs seed becomes plant germination of seed seed germination journey of seed

Light inhibits seed germination of

  1. Lactuca

  2. Capsella

  3. Allium

  4. Tobacco
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Germination of most of the seed is under the control of light. Usually, red light induces seed germination whereas far-red light suppresses germination. However, light inhibits seed germination of Mediterranean plants like Allium. It usually grows as crowded vegetation and germination take place in dark condition.

Thus, the correct answer is option C.

Multiple choice evs seed becomes plant germination of seed seed germination journey of seed

The main function of cotyledons in a seed is to

  1. provide protection to the radicle and plumule

  2. help in seed germination

  3. supply food, to the young embryo

  4. store food materials
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A cotyledon is part of the embryo within the seed of a plant. Often when the seed germinates or begins to grow, the cotyledon may become the first leaves of the seedling. contains protein, fats, and starches which provide energy for the developing seedling. The cotyledons provide a similar function. These are the seed leaves and they also contain storage of food for the developing plant. The cotyledons in some cases are major photosynthetic producers during germination. 

So, the correct option is, 'help in seed germination'.

Multiple choice natural vegetative propagation reproduction in plants biology

Bryophyllum propagates through spore formation.

  1. False

  2. True

  3. Ambiguous

  4. Data insufficient
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bryophyllum produces plantlets along the margins of its leaves. When they mature, they drop off and root in any suitable soil beneath thereby performing the function of vegetative propagation.
Thus, the correct answer is option (A), 'False'.

Multiple choice biology biology : an introduction introduction to organization of life signs of life what is living?

Germination of seeds can be related to which of the following properties of the living organism?

  1. Reproduction

  2. Growth

  3. Response to stimulus

  4. Both B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Seed germination in response to diurnal fluctuations of temperature. Diurnal fluctuations in temperature may initiate or accelerate germination in certain flowering plants, and the effectiveness of the stimulus varies according to the amplitude of fluctuation and the presence or absence of light. These seeds after germinating brow into a new plant.
So the correct option is D "both B and C".
Multiple choice sexual reproduction in flowering plants reproduction - the generating system reproduction sexual reproduction biology reproductive health of humans need of family planning reproductive health problems cell division in embryo development division for growth and reproduction reproductive health

Which of the following statements is not correct?

  1. Some reptiles have also been reported as pollinators in some plant species

  2. Pollen grains of many species can germinate on the stigma of a flower but only one pollen tube of the same species grows into the style

  3. Insects that consume pollen or nectar without brining about pollination are called pollen/ nectar robbers

  4. Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of pistil
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Option B is incorrect because multiple pollen tubes can grow into the style, although only one typically enters the ovule to effect fertilization.

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

The seeds respirate at the time of germination.White showing this experiment a test tube with KOH is kept in the conical flask to _____________. 

  1. Supply oxygen necessary for respiration.
  2. create space in the conical flask by absorbing $CO _3$.

  3. absorb water from the seeds and dry them

  4. make the air in the conical flask acidic
Reveal answer Fill a bubble to check yourself
A Correct answer