What would happen if a membrane protein were unable to bind with signaling molecule

Which of your fossils are most likely heterotrophs? which of them are autotrophs? how do you know?

What is the difference between magnification and resolution

In a hardy-weinberg population with two alleles, a and a, that are in equilibrium, the frequency of allele a is 0.1. what is the frequency of individuals with aa genotype? a) 0.42b) 0.20c) 0.32d) 0.81