In most of the aquatic algae, syngamy occurs in the external medium. In this condition

1. Organism shows great synchrony between the sexes

2. The small number of gametes and produced

3. The female gamete is not released into the water

4. Male gamete should develop before the female gamete

Life span of an organism

1. Does not include the phase of senescence

2. Is not necessarily correlated with body size of organism

3. Is very short in a unicellular organism like Amoeba

4. Includes accidental death of organism also

The most vital event of sexual reproduction is

1. Fusion of gametes

2. Gamete formation

3. Gamete transfer

4. Release of gametes

Development of zygote into individuals of the new generation

1. Depends on the type of life cycle the organism has and the environment to which has and the environment it is exposed to

2. Is independent of the environment to which the organism is exposed

3. Always occurs through embryo formation

4. Never needs a period of rest before its germination

Identify the labels A, B and C in the given diagram

1. Tuber, Germinating eye bud, Eyes

2. Bulb, Node, Eyes

3. Rhizome, Node, Flower

4. Tuber, Internode, Adventitious buds

Select the incorrect match with respect to vegetative propagules

1. Eyes          -  potato

2. Rhizome   -  Ginger

3. Offset        -  Water hyacinth

4. Bulbil        - Bryophyllum

Common vegetative propagule, capable, of giving rise to new individuals in Agave is

1. Leaf bud

2. Bulbil

3. Rhizome

4. Offset

Read the following statements carefully

a. Neelakuranji flowers once in 12 yeats

b. In the majority of organisms, male and female gametes are motile

c. During embryogenesis, the zygote undergoes mitosis and cell differentiation

1. All are correct

2. Only (b) is incorrect

3. All are incorrect

4. (a) and (b) are correct

Sexual reproduction is

1. Fast and simple process

2. Slow and simple process

3. Fast and complex process

4. Slow and complex process

Rhizomes are commonly used in vegetative propagation of

1. Water hyacinth

2. Bryophyllum

3. Ginger

4. Agave