Isogametes are seen in:
3. Human beings
The most critical event in sexual reproduction is:
(2) Gamete transfer
With respect to external fertilization, which of the following is not an advantage of internal fertilization?
1. A decreased risk of disease transmission
2. Minimal waste of gametes
3. Greater chances of individual egg fertilization
4. Relatively longer time of egg protection
Clear-cut vegetative, reproductive and senescent phase are not found in
Water hyacinth is an aquatic plant, also known as “Terror of Bengal” because of
Offsprings are extremely vulnerable to predators theratening their survival upto adulthood in organisms having
Consider the given statements
A. Asexual reproduction can occur through unspecialised or specialised parts of parents
B. Sexual structures and events in sexual reproduction are fundamentally similar in organisms
1. A is correct, B is incorrect
2. A is incorrect, B is correct
3. Both are correct
4. Both are incorrect
Find the correct statement with respect to given diagram:
Which statement is incorrect w.r.t. cell division during gamete formation?
A. A haploid parent produces gametes by meitotic division and meiosis does not occur in organism that are haploid.
B. Organism belong to bryophytes, pteridophytes, gymnosperms & angiosperms have diploid plant body and the reduction division occur at the time of gametogenesis.
C. Gametes in all heterogametic species are of two types, male and female and are either haploid or diploid depending upon the parent plant body.
D. In diploid organisms, specialized cells called meiocytes undergo meiosis and from gametemother cells.
1. A & B 2. B & D
3. A, C & D 4. A, B, C & D
In biological world each organism has evolved its own mechanism of reproduction, which depends upon?
Which group of plants show clear cut vegetative, reproductive and senescent phases in their life cycle?
1. Mustard, Radish, Mango
2. Peepal, Mango, Banyan
3. Wheat, Rice, Cabbage
4. Peepal, Bryophyllum, Rice
Mark the mis-matched pair
1. Polycarpic plants - Recovery phase
2. Offset - Water hyacinth
3. Marchantia - Monoecious plant
4. Bulbil - Agave
Consider the characters of a type of mode of reproduction:
I. It is a type of asexual reproduction seen in plants
II. New individuals arise without production of seeds or spores.
III. It is usually considered a cloning metho4.
What is this mode of reproduction called?
3. Vegetative reproduction