Two observations made by Charles Darwin during his 5 year voyage that led him to conclude that living species evolved from extinct species

Based on the law of dominance, we would expect percent of the offspring from this cross to have large teeth.

Which of the following can occur to two segments of a population if they are geographically isolated 1.) they can only share some types of genes 2.)both groups most likely become extinct 3.)they find a way to come back together 4.)eventually they become separate species

How does a catalyst influence a chemical reaction?