Fragmentation

Q.

What are akinetes?

Q. A pure tall plant bearing red colour flowers was crossed with a pure dwarf plant with white flowers. [5 MARKS]
(a) What would be the nature of offsprings in the F1 generation?
(b) If the offsprings of the F1 generation are self-pollinated, what would be the ratio of red flowers to white flowers in the F2 generation?
(c) What can you infer from the ratio obtained in (b)? Which law does it illustrate?

Q.

What are the vegetative means by which fungi reproduce?

Q.

Question 37
In tobacco plant, the male gametes have twenty-four chromosomes. What is the number of chromosomes in the female gamete? What is the number of chromosomes in the zygote??

Q.

What is germination?

Q.

Where are spores produced?

Q.

Give short notes on asexual reproduction which takes place in rhizopus.

Q.

Spirogyra seen in ponds multiplies through spore formation.

1. True
2. False

Q. Differentiate between.
Planogametic copulation and gametangial copulation

Q. Spirogyra is an example for the method of reproduction fragmentation.

1. False
2. True

Q.

Spirogyra seen in ponds multiplies through spore formation.

1. True
2. False

Q. Other than spirogyra, fragmentation also occurs in

1. Amoeba
2. Hydra
3. Planaria
4. None of the above

Q. In , broken parts of an organism develop to form a new individual.

1. budding
2. fission
3. fragmentation
4. spore formation

Q. refers to the process in which plants or animals replace lost or damaged parts by growing them back.

1. Fission
2. Budding
3. Regeneration

Q. We get 23 pairs of chromosomes from our parents.
But we get 23 from the mother and 23 from the father? not pairs?

Q. In , broken parts of an organism develop to form a new individual.

1. fission
2. fragmentation
3. budding
4. spore formation

Q. Fragmentation is a mode of reproduction in simple organisms.

1. complex
2. unicellular
3. multicellular

Q.

Factors responsible for the rapid spread of bread mould on slices of bread are-

1. Large number of spores
2. Availability of moisture and nutrients in bread
3. Presence of tubular branched hyphae
4. Formation of round shaped sporangia.

1. (i) and (iii)

2. (ii) and (iv)

3. (i) and (ii)

4. (iii) and (iv)

Q. In , broken parts of an organism develop to form a new individual.

1. fission
2. spore formation
3. budding
4. fragmentation

Q. Which of the following reproduces by fragmentation?

1. Spirogyra
2. Bryophyllum
3. Chlamydomonas
4. All of these

Q. How do process of budding different from process of spare formation