The protective substance that lines the stomach is called 1. Saliva
2. Mucous Membrane
3. Pepsin
4. Trypsin

Asmall number of finches are removed randomly from the wild and placed in a protected bird area. they are given as much food as they need and have plenty of space. why would natural selection not occur in this population? a. there is no reason for genetic mutation to occur. b. the birds compete for limited resources, c. the population has not reached carrying capacity. d. there is no genetic variation in the finches.

In a cladogram' when does a group of organisms branch off

What is turgor pressure, what causes it, and what does it do for a plant?