Question
Distinguish between: Asexual Reproduction – Sexual Reproduction

Answer

Asexual ReproductionSexual Reproduction
1. Fusion of sex cells or two compatible gametes is not involved.1. Fusion of sex cells or two compatible gametes is involved.
2. It results in production of genetically identical progeny.2. It results in production of genetically dissimilar offspring.
3. Offspring inherit genes of the parent.3. Offspring have combination genes from both the parents through their gametes.
4. Variations are not observed in progeny.4. Variations due to recombination are observed which are useful for survival and evolution of species.

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Read the following and answer any four questions from (i) to (v) given below:
Wetlands are called Ramsar sites because the first international convention on their conservation was held in Ramsar in Iran in 1971. Wetlands or Ramsar sites are low lying marshy areas which get filled up during rains due to runoff and overflow from other water bodies. They are often considered to be waste lands which are used as dumping areas and filled up to recover land for various constructions activities. As a result, a large number of wetlands have disappeared.
  1. Select the incorrect match of wetland and its location.
 
Wetland
Location
(a)
Harike
Punjab
(b)
Chandra Tai
H.P.
(c)
Bhoj
M.P.
(d)
Ashtamudi
Odisha
  1. Migratory bird flamingo breeds in which of the following wetlands?
  1. Bhitarkanika Mangroves.
  2. Rann of Kutch.
  3. Harike.
  4. Chandra Tal.
  1. Which of the following is not an importance of wetlands?
  1. They are an important source of recharging groundwater.
  2. They provide protection from floods.
  3. They are good source of siltation and purification of water.
  4. None of these.
  1. Which of the following wetland ecosystem is highly acidic and has a accumulation of decomposed plants known as peat?
  1. Bog
  2. Mangrove
  3. Estuary
  4. Watershed
  1. The mangroves of Bhitarkanika are famous for:
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  2. Nesting sites for endangered olive ridley turtles.
  3. Prawn cultivation.
  4. All of these.
(1) Column A (Asexual)Column B (Examples)
(1) Spore formation(a) Spirogyra
(2) Conidia formation(b) Yeast
(3) Fragmentation(c) Chlamydomonas
(4) Budding(d) Penicillium
Read the following and answer any four questions from (i) to (v) given below:
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  1. Green manures mainly provide nutrient enriched in:
  1. Magnesium.
  2. Sulphur.
  3. Nitrogen.
  4. Both (a) and (b).
  1. Which of the following plants is used as green manure in crop fields?
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  2. Dichanthium.
  3. Phyllonthus.
  4. Crotolaria.
  1. Green manure plants belong to the Family:
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  2. Papilionaceae.
  3. Liliaceae.
  4. Poaceae.
  1. Due to excess use of chemical fertilisers rich in nitrate, ________ disease occurred in children.
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  2. Septicemia.
  3. Methemoglobinemia.
  4. Botulism.
  1. A green manure is:
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Column AColumn B
(1) Neurons(a) Earthworm
(2) Ladder type(b) Hydra
(3) Ganglion(c) Flatworm
(4) Nerve net(d) Human
Distinguish Between: Homozygous and Heterozygous.
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  1. What is the characteristic of K?
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  2. K is Sertoli cell which provides nutrition to spermatids.
  3. K is secondary spermatocyte which undergo meiosis II to form spermatid.
  4. K is spermatid being converted into sperm.
  1. Which of the following cell undergo reduction division to form secondary spermatocyte?
  1. J
  2. M
  3. L
  4. K
  1. How many among the following have 46 chromosomes?
  1. 2
  2. 4
  3. 5
  4. 3
  1. Select an option that correctly identifies different labels.
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  2. ICSH
  3. ABP
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Read the following and answer any four questions from (i) to (v) given below:
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  1. Which method helps in contraception by temporary absence of sex?
  1. Coitus interruptus.
  2. Withdrawal method.
  3. Rhythm method.
  4. Lactational amenorrhea method.
  1. Assertion: The effectiveness of coitus interruptus method is limited.
Reason: Some sperms may pass into vagina before ejaculation.
  1. Both assertion and reason are true, and reason is the correct explanation of assertion.
  2. Both assertion and reason are true, but reason is not the correct explanation of assertion.
  3. Assertion is true, but reason is false.
  4. Both assertion and reason are false.
  1. Why is lactational amenorrhea effective for about 4-5 months after parturition?
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  2. Ovulation does not occur during intense lactation.
  3. This method inhibits mobility of sperms.
  4. Both (b) and (c).
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  2. Ovulation occurs on about $14^{th}$ day of menstruation.
  3. Sperms survive for about 3 days.
  4. Alteration in uterine endometrium.
  1. On which days of menstrual cycle should coitus be avoided to prevent fertilisation?
  1. 10-17
  2. 6-13
  3. 1-5
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Column AColumn B
Q.1. Neurons(a) Earthworm
Q.2. Ladder type(b) Hydra
Q.3. Ganglion(c) Flatworm
Q.4. Nerve net(d) Human
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  2. Twice
  3. Multiple
  4. None
  1. Select the main enzyme involved in DNA replication.
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  2. DNA dependent DNA polymerase
  3. Topoisomerase
  4. Helicase
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  2. (i)-Helicase (ii)-Hydrogen
  3. (i)-Unwindase (ii)-Phosphodiester
  4. (i)-Unwindase (ii)-Glycosidic
  1. DNA strand, built up of Okazaki fragments, is called.
  1. Lagging strand.
  2. Leading strand.
  3. Complementary strand.
  4. Parental strand.
  1. Select the incorrect statement about DNA polymerase in eukaryotes.
  1. Polymerase $\alpha$ is required for initiation of replication.
  2. When the RNA primer gets removed the gap is filled by DNA polymerase $\beta$ in eukaryotes.
  3. Polymerase $\in$ helps in elongation of lagging strand.
  4. Polymerase $\delta$ is largest and main enzyme for DNA replication in eukaryotes.
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(2) Stalk of the ovule(b) Integument
(3) Protective covering(c) Micropyle
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