Biology, 15.12.2020 17:00 orlando19882000
The stars at the edges of a galaxy are rotating around the galaxy’s center at the same speed as the stars in the middle of the galaxy. How does this provide evidence of dark matter?(1 point)
A- Dark matter subtracts gravity, which allows the stars to rotate at the same speed.
B- Dark matter emits the light that astronomers need to see the orbital speeds of the stars.
C-Dark matter absorbs light from outside the galaxy, allowing the light of the stars in the galaxy to show the orbital speeds of the stars.
D-Dark matter provides the gravity that allows the stars to rotate at the same speed.
Answers: 1
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What is one energy transformation that is taking place in the photo? radiant energy to thermal energy thermal energy to nuclear energy chemical energy to thermal energy radiant energy to chemical energy
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Biology, 22.06.2019 05:00
Dna. we have heard that we are a product of our dna. but where is it? how do we "get" our dna? it is passed to us, from our parents, but in what form? several vocabulary words associated with inheritance are used interchangeably and sometimes, incorrectly. let's see if you can clear this up for someone just learning about inheritance and cell structure.
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Biology, 22.06.2019 14:30
Explain why scientists use the word dominant for certain traits.
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