Grade 9 : Science - 3. Reproduction (Set 2) | Concept of Maths

Question 1

What type of asexual reproduction is Rohan observing on the bread?

Scenario: Rohan notices that a slice of bread left in a moist, dark cupboard for a few days develops a fuzzy black patch of mold. He learns this is a fungus called Rhizopus.

Accepted Answer

B) Spore formation

Answer

A) Budding

Answer

C) Binary fission

Answer

D) Fragmentation

Question 2

Which practical method of artificial vegetative propagation is being demonstrated here?

Scenario: Ananya is helping her grandmother in the garden. Her grandmother cuts a small branch of a rose plant containing a node of length L = 15\cm and plants it in moist soil.

Accepted Answer

C) Stem cutting

Answer

A) Grafting

Answer

B) Layering

Answer

D) Tissue culture

Question 3

Which type of asexual reproduction has Sameer documented?

Scenario: In a biology lab, Sameer is observing a slide of Amoeba under a microscope. He notices a single parent cell elongating, followed by the division of its nucleus and cytoplasm into two independent offspring.

Accepted Answer

C) Binary fission

Answer

A) Multiple fission

Answer

B) Budding

Answer

D) Regeneration

Question 4

Which reproductive method is Priya observing?

Scenario: While studying pond water, Priya finds a tiny multicellular organism called Hydra. She notices a small bulb-like projection growing on its lower body, which gradually develops tentacles and eventually detaches to live independently.

Accepted Answer

A) Budding

Answer

B) Fragmentation

Answer

C) Spore formation

Answer

D) Binary fission

Question 5

Which of the following reproductive strategies should the farmer use to achieve this?

Scenario: A farmer wants to grow banana plants that are genetically identical to the parent plant to ensure consistent fruit quality and sweet taste.

Accepted Answer

B) Vegetative propagation

Answer

A) Sexual reproduction through seeds

Answer

C) Cross-pollination

Answer

D) Double fertilization

Question 6

What is this process of transferring pollen grains from the anther to the stigma of a flower called?

Scenario: During a field trip, students notice bright yellow pollen grains sticking to the legs of a honeybee visiting a mustard flower.

Accepted Answer

B) Pollination

Answer

A) Fertilization

Answer

C) Germination

Answer

D) Ovulation

Question 7

What do the ovary and the ovule develop into after successful fertilization?

Scenario: Dr. Sharma explains to his class that after fertilization in a flowering plant, certain parts of the flower undergo major structural transformations to help protect and disperse the future offspring.

Accepted Answer

A) Fruit and Seed respectively

Answer

B) Seed and Fruit respectively

Answer

C) Petal and Sepal respectively

Answer

D) Stem and Root respectively

Question 8

What is this specialized asexual capability called?

Scenario: A researcher studying a flatworm called Planaria accidentally cuts it into N = 3 pieces. To her surprise, over time, each piece regrows its missing organs and develops into a complete, fully functional flatworm.

Accepted Answer

B) Regeneration

Answer

A) Budding

Answer

C) Spore formation

Answer

D) Binary fission

Question 9

What is this single cell formed immediately after fertilization called?

Scenario: In a school health seminar, a pediatrician explains that human reproduction involves the fusion of a male gamete (sperm, n = 23 chromosomes) and a female gamete (egg, n = 23 chromosomes) to form a single diploid cell.

Accepted Answer

C) Zygote

Answer

A) Embryo

Answer

B) Fetus

Answer

D) Larva

Question 10

What is this specific propagation technique called?

Scenario: A gardener wants to propagate a jasmine plant. He bends a flexible lower branch of the live plant, buries a portion of it under moist soil while keeping the tip exposed, and waits for roots to develop before cutting it off from the parent.

Accepted Answer

B) Layering

Answer

A) Grafting

Answer

C) Tissue culture

Answer

D) Budding