I'm confused about this question. 3. What form is energy in when it enters a food chain and when it leaves a food chain?
That is how it's written on the paper...

Skulls of (1) modern gorilla, (2) australopithecus afarensis, (3) homo erectus, (4) homo neanderthalensis, (5) homo sapiens based on the diagram, which of the following best describes ways in which the physical appearance of h. neandertalensis and h. sapiens differ? (2 points)

Which element provides strength to the exoskeleton of clams and oysters

Predict the results of a two base insertion or deletion in a strand of dna that codes for a protien, how does this differ from a three base insertion or deletion?