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

Which of the following is a step which is involved in seed germination?

  1. Absorption of Water

  2. Absorption of Carbon Dioxide

  3. Absorption of Light

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

Germination is the process of seeds developing into new plants. First, environmental conditions must trigger the seed to grow.

  1.  When water is plentiful, the seed fills with water in a process called imbibition. The water activates special proteins, called enzymes, that begin the process of seed growth. 
  2.  The seed grows a root to access water underground. 
  3. The shoot appears above ground. 

The seed sends a shoot towards the surface, where it will grow leaves to make food that provides energy. 
The leaves continue to grow towards the light source in a process called photomorphogenesis.
So the correct option is 'Absorption of Water'

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

State whether the following statements are true or false.
Oxygen is not necessary for seed germination;

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Aerobic respiration is respiration which occurs in the presence of oxygen. Aeration is the main phenomenon which helps in the germination of seed. Oxygen is absorbed by the cells which later gets transformed into energy for future uses. For better germination of seeds require oxygen, water, sunlight, and temperature.

So, the correct statement is 'True'.

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

Choose the correct answer from the alternatives given.
Seed germination is over when the:

  1. embryo sporophyte absorbs water

  2. embryo sporophyte resumes growth

  3. primary root pokes out of the seed coat

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

In summary, seed germination is the process of a fertilized plant ovary, or seed, developing into a mature plant. Seed germination starts with imbibition when the seed takes in water from the soil. This triggers root growth to allow the seed to get more water.

So, the correct option is 'primary root pokes out of the seed coat'.

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 self pollination asexual and sexual reproduction in plants botany

Effect of pollen on character of pericarp and seed coat is?

  1. Xenia

  2. Metaxenia

  3. Ruminate endosperm

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

Metaxenia refers to the effect of pollen on maternal tissues like the pericarp and seed coat, which are outside the embryo and endosperm. Xenia refers to the effect of pollen on the endosperm itself.

Multiple choice botany plants: structure and function significance of fruits fruit reproductive morphology

Essential requirement for seed germination is

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

  4. Scarification and internalization
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Seeds have three requirements for germination. These are water (during absorption and subsequent stages of growth), oxygen (for respiration) and temperatures (for metabolism and growth). In addition, light may or may not be necessary for germination.
Therefore, the correct answer is option A.

Multiple choice factors affecting respiration living organisms and energy production life processes in living organisms- part 1 respiration biology

The rate of respiration of young maturing seeds is quite high but as water contents decreases during further maturation respiration

  1. Remains high

  2. Stop complete

  3. Increase steadily

  4. Decrease steadily
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The rate of respiration of young maturing seeds is quite high which has amount of water as the limiting factor during maturation. Water helps in the acceleration of enzyme activity. When the amount of water is less, the rate of maturation decreases.

Multiple choice factors affecting respiration living organisms and energy production life processes in living organisms- part 1 respiration biology

If the naked pea seeds are kept in four respiratory flasks, they would germinate best in the flask which contains

  1. Carbon dioxide

  2. Oxygen

  3. Hydrogen

  4. Nitrogen
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Germination is a process of sprouting of seeds which later develops into a new plant. There are several factors which play vital role in the germination process. Theses are water, temperature, oxygen and light. During the process of germination, initially, the seed absorbs water. Later, the swollen seed respires that requires oxygen. Hence, when naked pea seeds are kept in a flask containing oxygen, it shows the best germination. 
Thus, the correct answer is option B.
Multiple choice evs life within the seed introduction to plant organs and germination seed to plants germination of seeds developmental journey of seed

The chemical used for treating the dormancy of seed is?

  1. TTC

  2. G A

  3. I B A

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

TTC (2,3,5-triphenyl tetrazolium chloride) is a chemical used to test seed viability by staining living tissues red. While GA (gibberellic acid) is used to break dormancy, TTC is the standard chemical reagent associated with seed testing protocols.

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

In wheat and rice _________________.

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In cereals like wheat and rice, the fruit is a caryopsis, where the pericarp (fruit wall) is fused with the seed coat (testa). This makes the grain a single-seeded fruit.

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

Sprouting time of seeds may vary according to 

  1. Temperature

  2. Humidity of the weather

  3. Air force

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.
Multiple choice evs life within the seed introduction to plant organs and germination seed to plants germination of seeds developmental journey of seed

Consider the following statements.
a. The seeds of Zea mays would germinate immediately after falling from the plant if favourable conditions of moisture, temperature and aeration are available.
b. Seed-coat dormancy is exhibited by Cassia and Gossypium
Which of the statements given is/are correct?

  1. $1$ only
  2. $2$ only
  3. Both $1$ and $2$
  4. Neither $1$ nor $2$
Reveal answer Fill a bubble to check yourself
A Correct answer