Deer eat grass, leaves, and acorns. They are eaten by wolves and coyotes. Deer are
A. primary producers
B. secondary producers
C. primary consumers
D. secondary consumers

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)

Aboy with an extra x chromosome probably has which of the following syndromes?

If the coding part of an mrna molecule is 1800 nucleotides (bases) in length, this molecule will contain codons and code for a polypeptide that is amino acids long.