‘Both growth and differentiation in higher plants are open’. Comment.

Which of the following statements are correct? I. Both growth and differentiation in higher plants are open II. Ethylene prevents rapid internodal or petiole elongation in deep water rice plants III. ABA induces seed germination IV. A defoliated plant can not respond to photoperiodic cycle

Both animals and plants grow. Why do we say that growth and differentiation in plants is open and not so in animals? Does this statement hold true for sponges also?

Both animals and plants grow. Why do we say that growth and diffeentition in plants is open and not so in animals? Does this statement hold true for sponges also?

Assertion :- Beside growth, differentiation in plants is also open. Reason:- Cells/tissues arising out of the same meristem have different structure at maturity.

Tissue culture is (a) Growth of specific plant structures on artificial medium (b) Cryogenic maintenance of tissues (c) Cryogenic maintenance of tissues (d) Maintenance, growth and differentiation of cells, tissues and organs on articial medium