Tag: modes of reproduction

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Questions Related to modes of reproduction

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

Fusion of a male gamete with egg in embryo sac is

  1. Autogamy

  2. Syngamy

  3. Double fertilization

  4. Triple fusion
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Syngamy and triple fusion are two events of sexual reproduction in plants. Syngamy is the fusion of one of the male gamete with the egg cell to produce a zygote while In triple fusion, second male gamete fuses with two polar nuclei to produce primary endosperm nucleus.

Since two types of fusions, syngamy and triple fusion take place in an embryo sac the phenomenon is termed double Fertilisation.
So, the correct answer is 'Syngamy'.

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

The phenomenon of endogamy is reported in

  1. Fasciola

  2. Earthworm

  3. Marchantia

  4. Rabbit
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fasciola is a genus of trematodes. It is commonly known as liver fluke. It shows the phenomena of endogamy where the two fusing gametes are derived from the same parent which means the gametes are uniparental. These are hermaphrodite and has both male and female reproductive organs. The male and female reproductive organs open up into the same chamber within the body, which is called the genital atrium where the two gametes fuses.

So, the correct answer is option A.

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

The type of syngamy in Trichonympha is

  1. Hologamy

  2. Anisogamy

  3. Isogamy

  4. Conjugation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The process of fusion between the haploid male nucleus and egg nucleus is known as amphimixis. It is also known as syngamy. It leads to the formation of a diploid zygote. The form of sexual reproduction in which the gametes are of the same size and structure as the somatic cells. Trichonympha lives in the intestine termite species and helps them to break the cellulose which they take from the wood. They produce similar haploid gametes known as zooflagellates so it is classified as hologamy.

So, the correct answer is option A.

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

Which of the following is incorrect about fertilization?

  1. It restores diploid condition.

  2. It activates egg.

  3. There is no variation.

  4. It determines sex of offspring.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

As the sperm reaches ovum to fertilize it, the ovum gets activated and completes its second meiotic division. After fertilization, a diploid zygote is formed. Fertilization also helps in determining the sex of the offspring. On the one hand, it leads to inherent qualities of a parent and on the other hand, it is the means for variations among the populations.

So, the correct option is 'There is no variation'.

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

Union between a large non-motile female gamete and a small motile male gamete is called ____________.

  1. Anisogamy

  2. Isogamy

  3. Oogamy

  4. Zoogamy
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Anisogamy refers to the fusion of two gametes that differ in size, typically a large non-motile egg and a small motile sperm. Oogamy is a specific type of anisogamy, but anisogamy is the broader, standard term for this size difference.

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

Male and female, both gametes arise from the same parent in

  1. Rabbit

  2. Humans

  3. Taenia

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
A. Rabbit is a monosexual animal. Male gametes are produced by male rabbit and female gametes are produced by a female rabbit.
B. In humans, females produce eggs and males produce sperms. These gametes fuse to produce a new organism. 
C. Taenia, commonly known as Tapeworm, is a hermaphrodite organism. Each segment of a tapeworm, which is known as proglottid, consists of male and female reproductive systems.
Hence, both male and female gametes arise from the same parent in Taenia, as it is a hermaphrodite. So, the correct answer is 'taenia'.
Multiple choice botany modes of reproduction fertilization in organisms sexual reproduction in organisms reproduction in organisms

Select the wrong statement

  1. Isogametes are similar in structure, function and behavior

  2. Anisogametes differ either in structure, function and behavior

  3. In oomycetes female gamete is smaller and motile, while male gamete is larger and non-motile

  4. Chlamydomonas exhibits both isogamy and 1, anisogamy and Fucus shows oogamy
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • An isogamete is a gamete that is indistinguishable in size and form from the other gametes. The sex i.e, the male and female have also exhibited no difference.  It is found in algae and fungi. 

So, the correct option is 'Isogametes are similar in structure, function, and behavior'.

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

A sexual reproduction by fragmentation takes place in-

  1. Amoeba

  2. Yeast

  3. Spirogyra

  4. Moss
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Spirogyra is a filamentous green alga that reproduces vegetatively through fragmentation, where the filament breaks into smaller pieces that grow into new individuals. Amoeba and Yeast primarily reproduce by fission and budding, respectively.

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

Which of the following is correct about  internal fertilization and external fertilization?

  1. Internal fertilization- Fertilization inside the female body, External fertilization- Fertilization outside the female body.

  2. Internal fertilization- Fertilization outside the female body, External fertilization- Fertilization inside the female body.

  3. Internal fertilizatlon- Chances of the survival of the offspring are more, External fertilization- Chances of survival of the offspring are less.

  4. Both A and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Internal fertilization occurs inside the body whereas external fertilization happens outside the body.
External fertilization requires the presence of water for the sperm to be able to unite with the egg. Large number of offspring are produced but the chances of survival is very less.
With internal fertilization, the presence of water is not needed. Fewer young ones are produced because the mother's body will protect any fertilized eggs from being devoured by predators, so chances of survival is high.
Thus, the correct answer is option (D), 'Both A and C.'