The antibiotic, penicillin, kills a certain type of disease-causing bacteria. Recently, however, a new strain of this bacteria was found that survives in the presence of
penicillin. What is the most likely explanation for this?

Use this diagram of an animal cell to answer the question. where does the first stage of cellular respiration occur? w x y z

In a relatively small iguana population the allelic frequency is tracked for three generations. webbing is a recessive allele; no webbing is the dominant allele. during one very rainy spring and summer, a flood washes all the iguana without webbed feet out to sea. by the fall, and three generations later, you have the gene pool seen here.

Question#29: why does the tropical ocean have a greater temperature range than the temperate ocean?