Please choose all the statements that are TRUE about life in the Precambrian. a. The first fossils are found in the Hadean Eon
b. The first trace fossils were made by animals that could burrow deep into the sediment
c. The Ediacaran Fauna was made of soft-bodied animals
d. The Small Shelly Fauna came millions of years after the Ediacaran Fauna
e. Multicellular life appeared early in the Archaean Eon

When ash and dust begin to settle on the ground, they eventually become compacted by

Assume that you are interested in separating short (200-400 bp) dna molecules from a pool of longer molecules in the 10,000-20,000 nucleotide range. you have two recipes for making your polyacrylamide gels: one recipe uses 1.5 percent agarose and would be considered a “hard gel,” while the other uses 0.5 percent agarose and would be considered a loose gel. which gel should you use to separate the short (200-400 bp) dna molecules from a pool of longer molecules in the 10,000-20,000 nucleotide range?

Color blindness is a recessive trait. the gene for color blindness is on the x chromosome. the family tree below shows the traits of color blindness. the only unknown is the father in the generation.