This is one little meteorite hit. Imagine something bigger ;)

Aflame cell is at the end of each tubule of the nephridium malpighian tubules kidneys none of the above

What best explains the inability for life to exist in earth early atmosphere

Guinea pig coat color is determined by a single gene. the allele for black coat color is dominant to brown. in a cross between twoblack-haired guinea pigs, 20 offspring are born. if both parents were heterozygous, probability would predict that approximately howmany of the 20 offspring would have brown hair?