The fossil record contains fossils from many geologic ages. Fossils enable scientists to plece together what ancient organisms looked like. Which of these answers best describes how fossils in the food classified?

O by ages and physical similarities
O by whether the fossil contains hard or soft tissues
O by size and the type of rock in which they are found
by similarities in their DNA and in the minerals they contain

Cold case files recently began re-investigating an old murder case. the murder took place in the park; a young man, james, was hit over the head with a brick and killed. police suspected the jealous former boyfriend of james' wife, karen. whoever killed james may have washed their hands in a near-by bird bath as detectives found blood in the bird bath. since the murder took place before dna fingerprinting was available, the suspected killer, ronnie, went free. detectives are now reviewing the blood evidence using dna fingerprinting. based on the dna fingerprints of all possible suspects, who is james' killer?

What is the significance of the protein-lined pits? a. protein attracts other proteins needed for atp synthesis within the cell. b. protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. c. the polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. d. receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.

Explain why it’s important for scientists to study the sun. list at least two challenges researchers face when examining earth’s nearest star.