Which of the following causes epigenetic modifications to DNA that affect gene expression without changing the DNA sequence? Base-pair substitution
DNA methylation
Mutation in regulatory sites
Gene knockout

What type of competition exsist between two species. turtles and fish

Which is a function performed by stem cells in the skin a. replacing lost skin cells b. making cells for the intestines c. growing new organs d. differentiating into brain cells plz apex

1. in a certain species of plant, the color purple (p) is dominant to the color white (p). according the punnett square, what is the probability of and offspring being white? 50%25%0%100% 2. in a certain species of plant, the color purple (p) is dominant to the color white (p). according the punnett square, what is the probability of and offspring being white? 0%100%50%25%(picture 1 is for question 1, and picture 2 is for question 2)