Tag: the life cycle of plants

Questions Related to the life cycle of plants

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

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

  1. True

  2. False

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Correct Option: A
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'.

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

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

  1. True

  2. False

Show answer
Correct Option: A
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'.

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

  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

Show answer
Correct Option: B
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 '.

The process of development of organism like itself is called-

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

  1. Budding

  2. Flowering

  3. Reproduction

  4. None of the above.

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Correct Option: C

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

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

  1. True

  2. False

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Correct Option: A
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.

Reproductive whorls of a flower are :

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

  1. Stamens and carpels

  2. Sepals and petals

  3. Sepals and stamens

  4. Petals and carpels

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Correct Option: A

Select the mismatched pair:-

botany asexual and sexual reproduction in plants parthenocarpic fruits parthenogenesis the life cycle of plants

  1. Ginger - Organ of perennation

  2. Citrus - Stem thorns

  3. Opuntia - Leaf spines

  4. Watermelon - Leaf tendril

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Correct Option: A

Which of the following is a parthenocarpic fruit?

botany asexual and sexual reproduction in plants parthenocarpic fruits parthenogenesis the life cycle of plants

  1. Dicot exalbuminous seed - Bean

  2. Monocot albuminous - Maize

  3. Scutellum - Endosperm in maize

  4. Coleorhiza - Radicle sheath in maize

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Correct Option: A

Development of an embryo directly from an egg cell without the participation of a male gamete is termed as 

botany life processes in living organisms- part 2 parthenocarpic fruits parthenogenesis the life cycle of plants

  1. Apospory

  2. Parthenogenesis

  3. Apogamy

  4. Both B and C

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Correct Option: D
Explanation:

Parthenogenesis is a form of asexual reproduction in which growth and development of embryos occur without fertilization. Parthenogenesis occurs naturally in many plants. The word parthenogenesis comes from the Greek; parthenos meaning virgin and genesis meaning birth.

The parthenocarpy is not advantageous in ......................

botany asexual and sexual reproduction in plants parthenocarpic fruits parthenogenesis the life cycle of plants

  1. Mango

  2. Coconut

  3. Pomegranate

  4. None of the above

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Correct Option: C
Explanation:

A parthenocarpy fruit is a kind of fruit which is artificially grown, it is a seedless fruit which cannot reproduce by sexual means but only by asexual ones. Pomegranate fruit has only one edible part, that is seeds. Thus, parthenocarpic seeds cannot be produced in pomegranates.