Tag: modes of reproduction

Quizzes (17) Questions (237)

Questions Related to modes of reproduction

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

In Melandrium album, absence of which segment of Y chromosome leads to development of a female plant?

  1. Suppressor region

  2. Promoter region

  3. Fertility region

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

In Melandrium album, the Y chromosome contains a suppressor region that prevents the development of female characteristics. Its absence leads to the development of a female plant.

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

During the development of ascus and basidium, which one of the following phenomena is common to both?

  1. Exogenous development of reproductive spores

  2. Fusion of two nuclei and subsequent meiotic division

  3. Crozier formation and clap connection

  4. Endogenous development of reproductive spores
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In both ascus (fungal asci) and basidium development, the fundamental common step is karyogamy, which is the fusion of two haploid nuclei, immediately followed by meiotic division to produce haploid spores. Spore development type and accessory structures like croziers vary between groups.

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

Characters that are transmitted from parents to offspring during reproduction show

  1. Only similarities with parents

  2. Only variations with parents

  3. Both similarities and variations with parents

  4. Neither similarities nor variations
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Character that are transmitted from parent to offspring during reproduction are similar to parent but they may vary due to mutation, crossing over and genetic recombination.
Multiple choice botany modes of reproduction why do plants reproduce? reproduction and variation the life cycle of plants

Offspring formed as a result of sexual reproduction exhibit more variations because

  1. Sexual reproduction is a lengthy process.

  2. Genetic material comes from two parents of the same species.

  3. Genetic material comes from two parents of different species.

  4. Genetic material comes from many parents.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Offspring formed as a result of sexual reproduction exhibit more variations because genetic material comes from two parents of the same species.

In asexual reproduction, the offspring that are produced are not only identical to the parent but are also exact copies of their parent. It is because in asexual reproduction, there is the involvement of a single parent. So, in this case the genetic variation is not created.
While in sexual reproduction, genetic variation is created and inherited. In sexual reproduction, two parents having different genetic composition participate in the reproductive process and also involve fusion of male and female gametes, which gives rise to the new individual having genetic composition of both.

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

What is the importance of reproduction?

  1. Regeneration

  2. Replication

  3. Both A and B

  4. Regeneration and passing genes
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • Reproduction is the method of making a copy of organisms or reproducing young ones. During reproduction, meiosis is the first stage by which gametes are prepared. 
  • Each gamete contains a copy of male or female parents. When a zygote is formed by the fertilization of the gametes, the genetic copy of both the parents come into the offspring. Thus, it helps in the passing of genes.

 Therefore, the correct answer is option D.

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

Which of the following plant hormones is incorrectly paired with its function?

  1. Auxinpromotes stem growth through cell elongation

  2. Cytokinin initiates senescence

  3. Gibberellinstimulates seed and bud germination

  4. Abscisic acidpromotes seed and bud dormancy
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Natural cytokinins are synthesized in regions where rapid cell division occurs, for example, root apices, developing shoot buds, young fruits etc. They promote nutrient mobilization which helps in the delay of leaf senescence.

So, the correct option is 'Cytokinin initiates senescence'


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

Which one the following is a requirement for sexual reproduction?

  1. Male and female parents

  2. Production of gametes

  3. Optimal environmental conditions

  4. Aquatic habitat
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sexual reproduction is the production of new living organisms by combining genetic information from two individuals of different types (sexes). In most higher organisms, one sex (male) produces a small motile gamete which travels to fuse with a larger stationary gamete produced by the other (female). Nearly all animals employ a diploid-dominant life-cycle strategy in which the only haploid cells produced by the organism are the gametes. Early in the development of the embryo, specialized diploid cells, called germ cells, are produced within the gonads (such as the testes and ovaries)

So, the correct answer is 'production of gametes'

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

Reproduction may be defined as a phenomenon by which organisms

  1. Increase in size

  2. Produce progeny of their own kind

  3. Are produced from single fertilized eggs

  4. Form new tissues and organs
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Reproduction  is the biological process by which new individual organisms – offspring – are produced from their parents. Reproduction is a fundamental feature of all known life; each individual organism exists as the result of reproduction. Reproduction in human beings is by sexual reproduction where both the male and female gametes fertilize to give rise to an embryo. The fertilization of human embryo occurs inside the body of the female 

So, the correct answer is 'produce progeny of their own kind'