Tag: botany

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Questions Related to botany

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

Reproduction is a .......... process of life.

  1. Structural

  2. Metabolic

  3. Fundamental

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

Reproduction is the process of continuation of a species. It is a mode of production of new organisms, called offsprings, from their parents. Each organism exists due to reproduction. With every new offspring, genetic variations are passed from the parents, that help the offspring survive better in the environment. Such variations and adaptations contribute to a species sustaining life for a longer duration.

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

Which of the following process of maintains the existence of the species on the earth?

  1. Metabolism

  2. Reproduction

  3. Adaptation

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Metabolism is a term that is used to describe all chemical reactions involved in maintaining the living state of the cells and the organism.
Reproduction is a biological process by which new individual organisms or offspring are produced from their parents. It is a fundamental feature of all known life and each individual organism exists as the result of reproduction.
Adaptation is the process of change by which an organism or species becomes better suited to its environment.
So, the correct answer is option B.
Multiple choice botany modes of reproduction why do plants reproduce? reproduction and variation the life cycle of plants

In certain plants viable pollen is formed but it cannot pollinate owing to nonrupture of anther wall. This condition is referred to as _____________.

  1. Cytoplasm sterility

  2. Functional sterility

  3. Genic sterility

  4. Genetic and cytoplasmic sterility
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Functional sterility occurs when a plant produces normal, viable pollen grains, but fertilization fails because the anther wall fails to rupture to release the pollen. Cytoplasmic and genic sterilities relate to internal genetic or cytoplasmic defects in pollen development rather than mechanical failure of the anther wall.

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.