Answer:
1. Humans already knew how to make their own weapons
2. Humans already knew the concept of hunting to survive
Explanation:
I had a similar question and I got it right based on what O said above...hope this helps!
Oxygen is the correct answer !
The four types of fossils are:
<span><span>mold fossils = (a fossilized impression made in the substrate - a negative image of the organism)
</span><span>
cast fossils = (formed when a mold is filled in)
</span><span>
trace fossils = ichnofossils (fossilized nests, gastroliths, burrows, footprints, etc.)
</span><span>
true form fossils= (fossils of the actual animal or animal part).</span></span>
Worms don't have lungs. They breathe through their skin.
Hope this helps. :)
Answer:
120 m/s
Explanation:
formula is displacement by time
v=s/t
v= 3600/30
v= 120m/s