You are standing above a 20 m high sea cliff with a large beach below you. all around you is a flat surface with thin soil on a rocky base. in the distance you see another flat bench but it is about 30 m higher than you are. where are you? a) on a dune field behind an active shorelineb) on a subsiding coastline where a recent earthquake happened to uplift the seabedc) on an uplifted wave-cut terrace along an emergent coastlined) you must be on the moon; there is nothing like that on earth.

enzyme speed up the reactions

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands