What do the different scientific theories about how life began on earth have in common? (2 points)
a seed of life was started through meteorite bombardment.
carbon-based molecules formed in an oxygen-poor environment.
early life was aquatic because all of earth was initially covered by ocean.
early earth had to warm considerably after its formation before it could support life.

Which of the following is an example of a non-falsifiable hypothesis? a. there is a teacup orbiting the milky way galaxy. b. there is no life on mars. c. the human species started in africa. d. humans cannot live without the amino acid methionine

Research cheetahs on the internet what has contributed to this animal becoming "endangered" or "threatened." what animal you have chosen? -cheetah how long has the animal been endangered or threatened? what has contributed to this animal’s endangered or threatened status? why is it important to save this animal from extinction? after researching and gathering facts, write a 350-word letter from the point of view of an animal rights' activist. be sure to include at least five facts that you learned from your research.

What is the role of dna ligase in the elongation of the lagging strand during dna replication?