How do Lichens contribute to primary succession?

Robert wants to know which fertilizer will work the best for his grass. what can he do to explore this inquiry?

How many copies of each chromosomes should be present in each of the 4 final haploid versions of gamete?

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.