Lamarck's hypothesis of evolution was based on which theory?

What would be the result if crossing over did not happen during meiosis in humans? a. there would be less genetic variation in humans. b. parents would be more likely to look like their children. c. the human population could not reproduce. d. children would have more chromosomes.

Acquired mutations can result from radiation pollution toxins inheritence select all that apply

Can yall plz me on this question im having a hard time think about it