Question

Q.19: Centrioles are associated with -
(a)DNA synthesis (b) Reproduction (c)Spindle formation (d)Respiration
Q.20: Main difference between animal cell and plant cell is -
(a)Chromosome (b) Ribosome (c)Lysosome (d) Endoplasmic Reticulum

Answer 1

Question: 19.

Answer : a) D N A synthesis.

Question: 20.

Answer : b) Chromosomes.

Answer 2

Answer: Q.19 (c)Spindle formation

              Q.20 (a)Chromosome

Explanation: For answer 19 : Centrioles are involved in the organization of the mitotic spindle and in the completion of cytokinesis. Centrioles were previously thought to be required for the formation of a mitotic spindle in animal cells. ... The centrioles can self replicate during cell division.

Explanation: For answer 20 : Every species has a characteristic number of chromosomes, called the chromosome number. Animals have more chromosomes; plants have fewer.

I HOPE THIS ANSWER WOULD HELP. PLEASE MARK ME THE  BRAINLIEST.