Botany-Reproduction in Organisms - Online Test

Q1.

Which organism is shown in figure below

Answer : Option B
Explaination / Solution:

The plants parts shown below is the leaf of Bryophyllum having small plantlets on its margin. The vegetative reproduction by leaves occurs in this species.

Q2. Micropropagation is technique
Answer : Option C
Explaination / Solution:

Micropropagation is the technique of growing large number of plantlets using small parts of plants. Plant parts are totipotent or able to generate whole plant with small portion. This process is also called as tissue culture in which true type of plants.

Q3. More complex organism cannot give rise to new individuals through regeneration because
Answer : Option A
Explaination / Solution:

Complex multicellular organisms have division of labour and tissues are specialized to perform specific function. In regeneration, new individual regains the lost body parts but higher organism cells are not capable to produce all kind of cells.

Q4. Somaclonal variation appears in plants
Answer : Option D
Explaination / Solution:

Tissue culture is mode of vitro propagation of large number of plantlets in short interval of time. During tissue culture, plants parts are kept in nutrient medium along with required hormones. Some variation arises in plants body although having same genetic traits.

Q5. What is common between vegetative propagation and apomixes
Answer : Option B
Explaination / Solution:

Both vegetative propagation and apomixes are types of asexually reproduction involving not fusion of gametes. So, new progeny produced are identical to parents.

Q6. Which one of the following pairs is wrongly matched
Answer : Option D
Explaination / Solution:

Water hyacinth develops offset for vegetative propagation. Its forms large number of branches in very short interval of time to cover the whole water bodies and depriving other aquatic organisms from oxygen dissolved in water.

Q7. Find the correct order of vegetative propoagules in potato, ginger Bryophyllum and water hyacinth
Answer : Option B
Explaination / Solution:

Potato tubers have eyes, ginger propagates through underground rhizome, Bryophyllum leaves have buds and water hyacinth propagates by offset stem. All these structures are mode of asexual reproduction

Q8. Asexual reproduction is common in
Answer : Option B
Explaination / Solution:

Asexual reproduction is common in Protists and Monera. Both these kinds include organisms having single celled body. Binary and multiple fissions are generally followed for asexual mode of reproduction.

Q9. Which of the following organism produce gemmules as asexual reproductive structure?
Answer : Option C
Explaination / Solution:

Gemmules are asexual reproductive structure produced by sponges. Chlamydomonas produce zoospores, hydra produce buds and Penicillium produces conidia.

Q10. In grafting, scion forms
Answer : Option D
Explaination / Solution:

In grafting, scion forms the upper shoot system and stock forms the lower root system. Grafting is an artificial mode of vegetative propagation in which two plants are cut and same height and joined together.