Which two of the following sentences from the arpicle include central ideas of the article? 1. If the transformation from chemistry to biology proves to be straightforward, the universe
might be full of life
2 These telescopes have provided beautiful images of protoplanetary disks as well as maps of
their chemical composition
3. Favored geochemical scenarios involve volcanic regions or impact craters.
4. Today, scientists are focused on understanding how chemistry on the infant Earth gave rise
to RNA and to RNA-based cells
(A)
1 and 2
1 and 4
(C)
2 and 3
(D)
3 and 4

On a recent expedition to a remote region of northern canada, scientists uncovered skeletal remains from about 100,000 years ago. surprisingly, all the skeletal remains, which included many species from differing biological families and spanned about two thousand years, showed evidence of experiencing temperatures in excess of 1000 degrees fahrenheit (or 538 degrees celsius). which of the following, if true, best explains the apparent paradox between the cold environment and the evidence of the bones experiencing hot temperatures? (a) chemical changes that naturally occur during the process of decay in only one north canadian species produce the same evidence of the species' skeletons being exposed to hot temperatures as the expedition scientists found. (b) a little over 103,000 years ago, a large fire is known to have occurred in northern canada. (c) strong evidence exists that as early as 70,000 years ago, homo sapiens around the world relied heavily on fire to cook animals. (d) in the same expedition and in roughly the same layer of excavation, scientists found rudimentary wood cutting and hunting tools used by early humans.

Explain why the plants cortex would serve as the best food source for animals

The frequency of alleles in a population that is in hardy weinberg equilibrium? a . changes in each successive generation b. is less important than the frequency genotypes c. shows evidence of the process of natural selection d. remains the same over several generations