Some scientists hypothesize that the first organic compounds could have been created on earth by

1 point
a.
the mixing of ocean water and soil and very low temperatures

b.
the separation of rocks and minerals over time

c.
the mixing of atmospheric gases containing ammonia, hydrogen, water, and methane at high temperatures

d.
photosynthesis that took place in primitive plants

4.06 hc)a five-year review of threats to the southern resident orca population of the united states concluded that the top threats were prey availability, contaminants, and effects from recreational and whale watching vessels. further down the list are oil spills, disease, and effects from commercial vessels not targeting whales. how might this list be different if it were for transient whale populations, which have a larger average population size and live farther offshore in open waters? a)the transient population is more likely to be affected by contaminants. b)the transient population is less likely to be affected by whale watching vessels. c)the transient population is more likely to be affected by disease. d)the transient population is less likely to be affected by prey availability.

In which part of the body is a ball-and-socket joint found?

24. how are vaccines used to keep people healthy?