Biology
Assertion (A): Micropropagation is the propagation or multiplication of plants by a special technique called 'tissue culture'.
Reason (R): It is called 'micropropagation' because this technique is applicable to micro-organisms only.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Reproduction in Plants
7 Likes
Answer
A is true and R is false.
Explanation — A is true as micropropagation involves growing plant cells, tissues, or organs in a laboratory setting to produce plantlets. These plantlets are then transferred to the soil.
R is false because micropropagation is not applicable to micro-organisms only. It is called micropropagation because plants are multiplied from very small plant parts or tissues under tissue culture conditions.
Therefore, A is true and R is false is the correct option.
Answered By
3 Likes
Related Questions
Assertion (A): Carrot is a biennial plant which stores food material in its roots in the first year.
Reason (R): This food is utilized in the second year to produce flowers and viable seeds, i.e. to reproduce sexually.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): Calyx is the outermost whorl of a flower which consists of large, fragrant and brightly coloured petals.
Reason (R): As petals are brightly coloured and fragrant, they can be noticed by insects easily and help in cross pollination.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): Vallisneria shows a special adaptation for hydrophilous pollination.
Reason (R): Its male flowers get detached from the plant and float freely until they reach and make physical contact with the female flowers at the water surface.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Fill in the blanks by selecting suitable words: (unisexual, fertilisation, fruit, stamen, anther, bisexual, pollination, seed, ovary)
(a) A flower that bears both the male and the female parts is known as …………… flower.
(b) A flower bearing only male or female parts is known as …………… flower.
(c) Transfer of pollen grains from the anther to the stigma is known as ……………
(d) Fusion of male cell with female cell is called ……………
(e) The ovule develops into a ……………
(f) The ovary of the flower develops into a ……………