Biology, 06.06.2020 05:59, Arden990560
(1)As a cloud of gas and dust collapses on itself and becomes more dense, the temperature at the center of the cloud
A, Increase
B, Decrease,
C, Stay the same.
(2)What is the first step in the nuclear fusion process?
A, two helium atoms combine to make one hydrogen atom
B, two hydrogen atoms combine to make one helium atom
C, two helium atoms combine to make one carbon atom
Answers: 1
Biology, 22.06.2019 16:30, kalebbenton15
The earth formed roughly 4.5 billion years ago, yet evidence of life dates back to about 3.5 billion years ago. which one is not a possible hypothesis of how life on earth arose?
Answers: 3
Biology, 23.06.2019 01:50, Kay6718
Some species of hummingbirds have different shapes of beaks that evolved to allow them to drink from certain flowers. the flower species have evolved to produce nectar that is tasty for the hummingbirds. this example is a type of . cuckoos lay eggs in the nests of other birds. the cuckoo lays eggs identical to the eggs of the host species, so the other bird takes care of it. this is an example of .
Answers: 3
(1)As a cloud of gas and dust collapses on itself and becomes more dense, the temperature at the cen...
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