Epithelial cells grow close together to form the body's .

Describe the primary and secondary immune response in terms of speed and number of antibodies produced?

Using meiosis, the sporophyte produces spores that are .

In a lab, scientists grew several generations of offspring of a plant using the method shown. what conclusion can you make about the offspring? a. they formed from meiosis and mitosis. b. they have half the number of chromosomes as their parent. c. they have low genetic variability among them. d. they will be able to reproduce only after they grow flowers.