Which of the following is a false statement?
(1) All organisms have evolved similar mechanism to multiply and produce offsprings
(2) Asexual reproduction is uniparental
(3) Sexual reproduction is biparental
(4) In asexual reproduction no fertilization occurs
Individuals of a clone:
(1) Are genetically similar but morphologically different
(2) Are morphologically similar but genetically different
(3) Are morphologically and genetically similar
(4) Are genetically and phenotypically different
Asexual reproduction is common:
(1) Among single celled organisms only
(2) Among plants only
(3) Among single celled organisms, plants and all animals
(4) Among single celled animals, plants and animals with simple organizations
Which of the following is not vegetative propagule?
(1) Rhizome and sucker
(2) Tuber and offset
(3) Bulbil (e.g. in Agave), leaf buds, bulb
(4) Antherozoid
Identify A to D in given diagrams showing asexual reproductive structure:
(1) A - Zoogamete, B - Bud, C - Conidia , D – Gemmule
(2) A - Zoospore, B - Conidia, C - Bud, D – Gemmule
(3) A- Zoospore, B - Conidiosporangium, C - Bud, D – Gemmule
(4) A - Aplanospore, B - Conidia, C - Bud, D - Gemmule
Examine the figures given below and select the right options out of (a - d); in which all the 4 items A, B, C and D are identified correctly:
|
A |
B |
C |
D |
1. |
Tuber |
Offset |
Sucker |
Leaf buds |
2. |
Offset |
Sucker |
Stolon |
Leaf buds |
3 |
Offset |
Sucker |
Stolon |
Leaf buds |
4. |
Tuber |
Rhizome |
Bulbil |
Leaf buds |
Which of the following statements is false?
(1) Asexual reproduction is simpler than sexual reproduction
(2) Asexual reproduction occurs by fission, budding and fragmentation
(3) In most of the animals both asexual and sexual modes of reproduction are found
(4) Vegetative and sexual modes of reproduction are exhibited by the higher plants
Which of the following is false about internal fertilization?
I. Male gamete is motile
II. Male gametes are non-motile
III. Male gametes are produced in large number
IV. Male gametes are produced in small number
V. There is a significant reduction in the number of eggs produce
VI. In seeded plants non-motile male gametes are carried to female gamete by pollen tubes
(1) I, III, V, VI
(2) III, IV
(3) II, IV
(4) V, VI
Select the-correct sequence from the following:
(1) Gametogenesis → Syngamy → Zygote → Embryogenesis
(2) Gametogenesis → Syngamy → Embryogenesis → Zygote
(3) Zygote → Embryogenesis → Gametogenesis
(4) Syngamy → Gametogenesis → Zygote → Embryogenesis
Select the correct sequence from the following:
I. Juvenile phase → Senescent phase → Reproductive phase
II. Juvenile phase → Reproductive phase → Senescent phase
III. Reproductive phase → Juvenile phase → Senescent phase
IV. Vegetative phase → Reproductive phase → Senescent phase
(1) I and II
(2) I and IV
(3) III and IV
(4) II and IV