Identify the group of scientists who developed the intergenic hybrid - the pomato.

(a)

Yamada et al.

(b)

Horsh et al.

(c)

Takebe et al.

(d)

Melchers et al.

Which of the following condition favours callus induction?

(a)

Temperature of 25°C ± 5°C with 12 hours of photoperiod

(b)

Temperature of 25°C ± 2°C with 18 hours of photoperiod

(c)

Temperature of 25°C ± 5°C with 14 hours of photoperiod

(d)

Temperature of 25°C ± 2°C with 16 hours of photoperiod

The optimal pH of culture medium is generally ___________.

(a)

Acidic

(b)

Basic

(c)

Neutral

(d)

Slightly basic

Assertion (A) : Development of root from callus is called caulogenesis.
Reason (R) : Caulogenesis is the final step of protoplasmic fusion.

(a)

Both A and R are correct but R is not a correct explanation to A

(b)

R explains A

(c)

A is correct R is incorrect

(d)

Both A and R are incorrect

The phenomenon of reversion of mature cells to meristematic state leading to callus formation is___________

(a)

Redifferentiation

(b)

Dedifferentiation

(c)

either (a) or (b)

(d)

none of these