Author Question: Why is the hypothesis that life on Earth came from outer space considered plausible? A) because ... (Read 52 times)

viki · **on:** Jul 27, 2018

Why is the hypothesis that life on Earth came from outer space considered plausible?

A) because alien DNA is like human DNA
B) because organic molecules have been found in space
C) because many meteorites contain complex organic molecules
D) because Earth has had many collisions in its history
E) because Earth formed with the Sun from the solar nebula

Question 2

In Hubble's classification, which type of galaxy has a small bulge and loose, widely spread, poorly defined spiral pattern?

A) SO
B) S9
C) Sa
D) Sc
E) SBw