Select one of the ways below that have increased human life expectancy A. new medicines
B. new cars
C. new types of cell phones
D. New types of stores

Which organisms have pharyngeal arches that develop from all three germ layers and go through the same development stages as embryos? 1.bird 2.ladybug 3.starfish 4.snake

Compare and contrast region e in the illustration above with region d. describe the physical characteristics of each region.

Modern whales developed their traits through natural selection what occurs during the process of natural selection