The reactants when fossil fuels are burned are shown below. what are the
products of this reaction?
fossil fuel + oxygen gas → ?
o
a. carbon dioxide + fossil fuels
b. water + heat
o
c. nitrogen gas + heat
o
d. carbon dioxide + water + heat
!

What have we learned from fossil evidence about evolution? a) it is an abrupt change. b)the process is observable. c) it takes place during one lifetime only. d)the most complex traits are always selected.

What kind of seafood would you expect to have the highest levels of mercury and why? kelp, because they use the sun to photosynthesize on the bottom trophic level. oysters, because they filter feed on plankton on a lower trophic level. small fish, because they eat plankton on a higher trophic level. sharks, because they feed on organisms on a higher trophic level.

Astudent is looking through a microscope at some cells of an onion root tip. many of these cells are undergoing division since the root tip grows quickly and requires more cells. which cell most recently underwent metaphase? w x y z