Gametes are haploid. It signifies that
1. They cannot be formed without meiosis
2. They always have half the number of chromosomes than that of main plant body
3. Bryophytes produce them by mitosis
4. Bryophytes do not show meiosis since plant body is haploid
Identify the correct match
Column l Column ll
1. Grasses - Runners
2. potato - Rhizome
3. Crocus - Tuber
4. Agave - Bulb
Select incorrect statement with respect to life span.
a. It is the period from the reproductive phase to the senescent phase.
b. Life spans of organisms are not necessarily correlated with their sizes.
c. No individual is immortal, whether single-celled or multi-celled.
d. The life span of banana tree is 25 years.
1. a & d
2. a & b
3. a & c
4. c & d
The whole plant can be developed vegetatively in Agave form a propagule like
1. Rhizome
2. Corm
3. Bulb
4. Bulbil
I : Zoospores are the most common asexual reproductive structures in algae
II :Algae and fungi always require water for fertilization always.
1. Both I & II are correct and II is the correct explanation of I
2.Both I & II are correct but the II is not the correct explanation of I
3. I is a correct statement but II is not correct.
4. Both I & II are incorrect statements.
Find out the incorrect option :-
1. Bulbil-Agave
2. Rhizome-Ginger
3. Corm-Onion
4. Tuber-Potato
male and female flowers are present on same plant in all of these, except
1. Cucurbits
2. Coconuts
3. Maize
4. Date palm
Algae and fungi resort to sexual reproduction because
1. It is more rapid form of propagation
2. Zygote as with its thick wall make them able to withstand unfavourable conditions
3. Formation of zygote is universal event
4. Every organism begins life as a single cell
Which of the following statement is correct?
1. Strobilanthus Kunthinan flowers once in 12 years
2. Formation of the diploid embryo is universal in all sexually reproducing organisms
3. In the majority of organisms, both male and female gametes are stationary
4. Sexual reproduction is an elaborate, complex and rapid process as compared to asexual reproduction
Most vital event of sexual reproduction is
1. Embryogenesis
2. Essential for the fusion of gametes
3. Pollination
4. Development of fruits