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The two events that occur when gravity causes a nebula to collapse into itself are:
A. Nuclear fusion start.
B. A new star forms.
Explanation:
- Nebula are giant clouds of dust and gases.
- These clouds are considered as progenitors of stars and planets.
- The gravitational pull within these giant clouds result these large masses to collapse towards their centre.
- The gravitational collapse results in tremendous rise in temperature till a point where nuclear fusion begin .
- The stars are born out of such mechanism and act as a source of heat and light in universe.
The answer is : crossing over can increase genetic variations during meiosis
Answer: B and D
Explanation: just took the assignment
Answer:
Chem formation, DNA
Explanation:
This is because of how an organism is made up/gets its genes.
