Tag: modes of reproduction

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Questions Related to modes of reproduction

Multiple choice botany modes of reproduction why do plants reproduce? reproduction and variation the life cycle of plants

Reproduction, unlike other life processes, is not essential to maintain the life of an individual organism.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Reproduction is the biological process by which new individual organisms or 'offsprings' are produced from their 'parents'. Reproduction is a fundamental feature of all known life; each individual organism exists as a result of reproduction. 
  • Though it is not essential, meaning, if someone does not reproduce, it will not end his life.

Therefore, the correct answer is option A.

Multiple choice botany modes of reproduction why do plants reproduce? reproduction and variation the life cycle of plants

Reproduction is not essential for an individual but to maintain the species.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Reproduction is the process that ensures continuity of species. All Individuals of any species die after their lifespan but some of them leave behind offsprings that will ensure continuity of species.
  • Sterile members of any species, worker bees, mule etc. Complete their lifespan without reproduction. Hence, reproduction is not essential for any individual. 

So, the correct option is 'True'.

Multiple choice botany modes of reproduction why do plants reproduce? reproduction and variation the life cycle of plants

State the following statements are true or false.
Presence or absence of hymen is not a reliable indicator of virginity or sexual experience.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The hymen is often torn during the first coitus. the presence or absence of the hymen is not a reliable indicator of virginity or sexual experience.

So, the correct option is 'True'.

Multiple choice botany modes of reproduction why do plants reproduce? reproduction and variation the life cycle of plants

Match Column I with Column II and select the correct option using the codes given below.

Column I Column II
A. Mons pubis 1. Embryo formation
B. Antrum 2. Sperm
C. Trophoectoderm 3. Female external genitalia
D. Nebenkern 4. Graafian follicle

  1. A - 3, B - 4, C - 2, D - 1

  2. A - 3, B - 4, C - 1, D - 2

  3. A - 3, B - 1, C - 4, D - 2

  4. A - 1, B - 4, C - 3, D - 2
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The mons pubis is the rounded eminence, made by fatty tissue beneath the skin, lying in front of the pubic symphysis. The antrum is the portion of an ovarian follicle filled with follicular fluid. The trophectoderm is a layer of cells on the outer edge of a blastocyst. These cells provide nutrients for the developing embryo, facilitate attachment to the uterine lining and become part of the placenta. The nebenkern is a mitochondrial formation in the sperm of some insects such as Drosophila.

 So the correct option is ' A - 3, B - 4, C - 1, D - 2 '.

Multiple choice botany modes of reproduction why do plants reproduce? reproduction and variation the life cycle of plants

Only variations that confer an advantage to an individual organism will survive in a population. 

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
All the variations do not have an equal chance of surviving in the environment in which they find themselves. The chances of surviving depend on the nature of variations. Different individual would have different kind of advantages. A bacteria that can withstand heat will survive better in a heat wave. Selection of variants by environmental factors forms the basis for revolutionary process.
Multiple choice botany modes of reproduction fertilization in organisms sexual reproduction in organisms reproduction in organisms

Fusion of two gametes which are dissimilar in size is termed as

  1. Oogamy

  2. Isogamy

  3. Anisogamy

  4. Both A and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
In anisogamy the fusing gametes differ in size and behaviour. One of the two gametes is larger and is called macrogamete or female gamete; the other is smaller and is termed microgamete or male gamete. In oogamy, there is a large food laden non-flagellate female gamete called egg or oosphere whereas the male gamete or antherozoid is smaller and motile. Oogamy is the familiar form of sexual reproduction, it is a form of anisogamy (heterogamy).
So, the correct answer is 'Both A and C'.
Multiple choice botany modes of reproduction fertilization in organisms sexual reproduction in organisms reproduction in organisms

Life begin in all sexually reproducing organisms as a

  1. Single-celled zygote

  2. Double-celled zygote

  3. Haploid zygote

  4. Haploid gametes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Zygote is the vital link that ensures continuity of species between organisms of one generation and the next. Every sexually reproducing organism, including human beings begin life as a single cell - the zygote. 

Multiple choice botany modes of reproduction fertilization in organisms sexual reproduction in organisms reproduction in organisms

Following table summarises the differences between self-fertilisation and cross-fertilisation. Pick out the wrong difference.

  1. Self-fertilisation - It is uniparental, Cross-fertilisation - It is biparental

  2. Self-fertilisation - It involves the fusion of male and female gametes of the same parent, Cross-fertilisation - It involves the fusion of two gametes produced by different parents

  3. Self-fertilisation - Examples : Pheretima, Periplaneta, Cross-fertilisation - Examples : Taenia, Rana tigrina

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Self-fertilisation occurs in Taenia, while cross-fertilisation occurs in Pheretima, Periplaneta and Rana tigrina.