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

If a robot fixed another robot is it a engineer or doctor?

Which of the following scenarios is an example of the bottleneck effect? answers a in south africa, much of the afrikaner population is descended from a small number of dutch colonists. in this population, this is an unusually high frequency of pseudoxanthoma elasticum (pxe), an elastic tissue disorder. b four white-tailed deer are introduced to a park in finland. thirty years after their introduction scientists compare the genes in the population and find that there is no variation. c during the industrial revolution, london's air became filled with soot. as a result, birds started eating more of the lighter moths because they were easier to spot than their darker counterparts. over time, the moth population changed so that there were more darker moths than lighter ones. d 10% of the population of american alligators in an area have the recessive trait albinism. a massive flood results in the death of 80% of the population. of the remaining population, 60% have the recessive trait of albinism.

Aquaternary consumer species would be expected to have a smaller population than a secondary consumer species. select the best answer from the choices provided t f