The only process that can change a gene's dna and therefore give rise to new genetic variations in a species is

Which of the following is a main difference in cell structure between an onion cell and a human cheek cell? a. an onion cell contains one nucleus, whereas a human cheek cell contains two nuclei. b. an onion cell has a cell wall. c. a human cheek cell contains chloroplasts. d. there is no difference between an onion cell and a human cheek cell. you for your.

The kind of fertilization found in the majority of aquatic animals is (internal or external) fertilization.

Body systems are not completely independent they integrate and work together describe one example of the integration between body systems