The first multicellular animals to evolve were invertebrates. Why have so few fossils of these organisms been found? A. Their soft bodies do not fossilize well.

B. There were very few species alive long ago.

C. High rates of predation forced many to extinction before they could be preserved.

D. Conditions were not right for preservation at the time when they lived.

If two objects at different te,peraure are in contact with each other what happens to their temperature

Table sugar completely dissolved in water is an example of a?

The two naturally occurring isotopes of chlorine are 35cl (34.969 amu, 75.77%) and 37cl (36.966 amu, 24.23%). the two naturally occurring isotopes of bromine are 79br (78.918 rm amu, 50.69%) and 81br (80.916 amu, 49.31%). chlorine and bromine combine to form bromine monochloride, brcl. 1. how many peaks will be present in a mass spectrum for brcl? the four combinations of molecule possible given these four isotopes are: 81br37cl, 81br35cl, 79br37cl, and 79br35cl. 2. what are the masses of the four different brcl molecules? express the masses using six significant figures, in decreasing numeric order (highest to lowest), separated by commas.