Answer:
If an object moves along a straight line, the distance travelled can be represented by a distance-time graph. In a distance-time graph, the gradient of the line is equal to the speed of the object. The greater the gradient (and the steeper the line) the faster the object is moving.
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Answer:
Mule is that discovery which changes the idea that horse and donkey belong to the same specie.
Explanation:
When male donkey mate with female horse, mule is produced but two mules cannot produce another mule because they are infertile. So according to the definition of specie, species are the organisms which mate with each other and produce a fertile offspring. So according to this definition, donkey and horse are two different species.
Again the only ATP that is produced occurs during the glycolysis reactions. One three-carbon molecule (pyruvic acid) is changed into another three-carbon molecule (lactic acid) and no carbon dioxide is produced like during other forms of respiration.
Answer:
are made of mostly helium and hydrogen
Explanation:
Answer:
D
Explanation:
Key points:
- Cells have a variety of mechanisms to prevent mutations, or permanent changes in DNA sequence.
- During DNA synthesis, most DNA polymerases "check their work," fixing the majority of mispaired bases in a process called proofreading.
- Immediately after DNA synthesis, any remaining mispaired bases can be detected and replaced in a process called mismatch repair.
- If DNA gets damaged, it can be repaired by various mechanisms, including chemical reversal, excision repair, and double-stranded break repair.
that's from khan academy^
