Post Video Test - Reproduction in OrganismsContact Number: 9667591930 / 8527521718Post Video Test - Reproduction in OrganismsContact Number: 9667591930 / 8527521718Isogametes are seen in:
1. Cladophora
2. Fucus
3. Human beings
4. Ficus
The most critical event in sexual reproduction is:
(1) Gametogenesis
(2) Gamete transfer
(3) Fertilization
(4) Embryogenesis
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
(1) Annual plants
(2) Biennial plants
(3) Perennial plants
(4) More than one option is correct
Water hyacinth is an aquatic plant, also known as “Terror of Bengal” because of
(1) Its ugly flower and odour
(2) It drains oxygen from odour
(3) It can propagate sexually at a phenomenal rate
(4) Fast growth of the plant caused death of fishes and food scarcity
Offsprings are extremely vulnerable to predators theratening their survival upto adulthood in organisms having
(1) Asexual reproduction
(2) External fertilisation
(3) Internal ferilisation
(4) Vegetative reproduction
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:
(1) Sex organs are jacketed and unicellular
(2) Fresh water green alga with female and male cone
(3) Nucule and globule as female and male sex organs respectively which are exceptionally present in green algae
(4) No sexual reproduction and shows haplontic life cycle
Which statement is incorrect with respect to 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?
(1) Habitat
(2) Internal physiology
(3) Size of organism
(4) Both 1 and 2
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?
1. Parthenogenesis
2. Parthenocarpy
3. Vegetative reproduction
4. Fragmentation
