Why are lichens so important for primary succession?

What is the theory on how cells came to have mitochondria.

What word best describes Turtle? a. dormant b. skeptical c. resilient d. cantankerous

Which statement about both type 1 diabetes and celiac disease is true? a.) They are both more common in men. b.) They are both caused by an attack on the endocrine system. c.) They are both caused by exposure to gluten. d.

What are two ways that Homo erectus was different from earlier human ancestors?

2 ways genome mapping is used today

The chief force pushing water and solutes out of the blood across the filtration membrane is A) the ionic electrochemical gradient B) protein-regulated diffusion C) glomerular hydrostatic pressure D) the size of the pores in the basement membrane of

From day 23 to 28 the progesterone levels are dropping. What effect will this eventually have on the endometrium?

When both muscles of this pair are contracted simultaneously, they flex the neck forward. When both muscles of this pair are contracted simultaneously, they flex the neck forward. a. platysma b. semispinalis c. sternocleidomastoid d. trapezius

At the beginning of cellular respiration, energy is stored in the bonds of blank molecules. At the end of cellular respiration, energy is stored in the bonds of blank molecules. for each one has the options of: ATP, glucose, or oxygen

What is the difference between frond and cone