What kind of stem cells are used to treat patients with heart attacks? Kinds of stem cells: Tissue-specific, embryonic stem cell, adult, and etc.

Ascientist is studying muscle twitches in chicken quadriceps. to activate the muscle, he needs to provide stimulus to the

Which number represents a basic ph, 4 or 9? numerical answers expected! answer for blank 1: i'll give

Where is having brightly colored feathers that attract mates most clearly an adaptation for a bird? a. a forest with dense vegetation b. a sandy beach beside an ocean c. a snowy tundra with little vegetation d. a swamp with many hawks that eat birds