Tag: botany

Questions Related to botany

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

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

  1. Structural

  2. Metabolic

  3. Fundamental

  4. None of the above

Show answer
Correct Option: C
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.

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

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

  1. Metabolism

  2. Reproduction

  3. Adaptation

  4. None of the above

Show answer
Correct Option: B
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.

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

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

  1. Cytoplasm sterility

  2. Functional sterility

  3. Genic sterility

  4. Genetic and cytoplasmic sterility

Show answer
Correct Option: A

Which one of the following plant species reproduces by apomixes?

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

  1. Nicotiana tabacum

  2. Pavonia Zeytanica

  3. Poa pratensis

  4. Eclipta alba

Show answer
Correct Option: A

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

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

  1. Suppressor region

  2. Promoter region

  3. Fertility region

  4. Pairing region

Show answer
Correct Option: A

Which of the following pairs are correctly matched? Plant Organ or Reproduction.
a. Oscillatona - Homogony
b. Nostoc - Aconites
c. Streptomyces - Conidia
d. Albugo - Zoospore
Select the correct answer from the codes given.

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

  1. $1, 2$ and $3$

  2. $1, 2, 3$ and $4$

  3. $1, 3$ and $4$

  4. $2$ and $4$

Show answer
Correct Option: A

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

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

  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

Show answer
Correct Option: A

Characters that are transmitted from parents to offspring during reproduction show

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

  1. Only similarities with parents

  2. Only variations with parents

  3. Both similarities and variations with parents

  4. Neither similarities nor variations

Show answer
Correct Option: C
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.

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

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

  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.

Show answer
Correct Option: B
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.

What is the importance of reproduction?

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

  1. Regeneration

  2. Replication

  3. Both A and B

  4. Regeneration and passing genes

Show answer
Correct Option: D
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.