Tag: the flower

Quizzes (10) Questions (133)

Questions Related to the flower

Multiple choice biology seeds - structure and germination germination seed germination the flower

In some halophytes, seeds germinate within fruits while attached to parent plant. The phenomenon is

  1. Vivipary

  2. Monocrapic

  3. Vernalisation

  4. Seismonasty

  5. Both A and B
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A. Vivipary :  In plants, vivipary (precocious or premature germination) involves the germination of seeds while still on the parent plant. It is a widespread phenomenon in plants characterized by the lack of seed dormancy. 

C. Monocarpic- flowering only once.

D. Vernalisation- The cooling of seed during germination in order to accelerate flowering when it is planted.

E. Seismonasty is the nastic response of a plant or fungus to touch or vibration.

So, the correct answer is 'Vivipary'.

Multiple choice biology seeds - structure and germination germination seed germination the flower

Fruit of peanut is

  1. Pod

  2. Achene

  3. Caryopsis

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

A. Pods develop underground, an unusual feature known as geocarpy. After fertilization, a short stalk at the base of the ovary (termed a pedicel) elongates to form a thread-like structure known as a "peg". This peg grows down into the soil, and the tip, which contains the ovary, develops into a mature peanut pod.

B. Achene- A small, indehiscent, one seeded fruit developing from a monocarpellary ovary and in which pericarp is hard, leathary and remains free from seed coat. E.g. Mirabilis.

C. Caryopsis- A small, indehiscent, one seeded fruit developing from a monocarpellary ovary and in which pericarp is fused with the seed coat. E.g. Wheat.

D. Drupe- A small, indehiscent, one seeded fruit developing from a monocarpellary ovary and in which pericarp is differentiated into outer,thin epicarp, middle fleshy and fibrous mesocarp and inner hard and stony endocarp. E.g. Mango. So, the correct answer is 'Pod'.

Multiple choice biology seeds - structure and germination germination seed germination the flower

Terminator gene

  1. Helps in terminating flowering

  2. Helps in terminating seed germination

  3. Used in hybridisation

  4. None of the above.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Terminator genes are genetic modifications designed to prevent seeds from germinating in subsequent generations, effectively forcing farmers to buy new seeds.

Multiple choice biology seeds - structure and germination germination seed germination the flower

In hypogeal germination, plumule comes out of ground due to elongation of

  1. Hypocotyl

  2. Epicotyl

  3. Cotyledons

  4. Both A and B
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In this type of germination, the epicotyl elongates and the cotyledons remain below the soil. Pea, mango, maize, rice, gram and groundnut have germination of this kind. So, the correct answer is 'Epicotyl'.

Multiple choice biology seeds - structure and germination germination seed germination the flower

Which of the following comes first out of the soil in the bean seed?

  1. Hypocotyl

  2. Radicle

  3. Leaf foliage

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The hypocotyl elongates rapidly and arches upwards pulling the cotyledons which move above the soil. Bean, cotton, papaya, gourd, castor and onion have germination of this kind.
So the correct option is 'Hypocotyl'.
Multiple choice biology seeds - structure and germination germination seed germination the flower

Which one of the following statements is not correct regarding vivipary?

  1. Seeds germinate within the fruit while still attached to the mother plant

  2. It usually occurs under highly saline conditions

  3. It occurs in the mangrove plants

  4. It involves a dormancy period for the seed
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vivipary involves the seed germinating immediately while attached to the parent, thereby bypassing the typical dormancy period that other seeds undergo.

Multiple choice biology seeds - structure and germination germination seed germination the flower

Identify the correct sequence of stages of germination in pea plant.

  1. Bursting of the seed coat, radicle comes out, coleoptile pushed upward, primary root and leaf foliage developed.

  2. Bursting of the seed coat, radicle comes out, plumule pushed upward, primary root developed.

  3. Bursting of the seed coat, radicle comes out, primary root developed, hypocotyl comes out of the soil.

  4. Bursting of the seed coat, coleoptile pushed upward, radicle comes out, primary root and leaf foliage developed.
Reveal answer Fill a bubble to check yourself
B 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.
  2. The water activates special proteins, called enzymes, that begin the process of seed growth. 
  3. The seed grows a root to access water underground. 
  4. The shoot appears above ground. 
  5. The seed sends a shoot towards the surface, where it will grow leaves to make food that provides energy. 
  6. The leaves continue to grow towards the light source in a process called photomorphogenesis.
So the correct option is 'Bursting of the seed coat, radicle comes out, plumule pushed upward, primary root developed.'