The phanerozoic eon began at the same time as which of these? select all that apply. a. the start of the paleozoic era b. the start of the cambrian period c. the end of the proterozoic eon d. the start of the precambrian super-eon

Which organelle releases chemicals that break down large food particles into smaller ones?

How does pregnancy begin? a) a placenta forms in the uterus b) a sperm reaches an egg in the fallopian tubec) the blastocyst differentiates into two cell types d) contractions begin in the uterine wallapex

Which is a genetic engineering advancement directly related to a career in biotechnology? 1) improving solar energy collection 2) transporting textiles at higher rates 3)creating crop foods that resist insect pests 4)repairing historical sites with quality materials