Answer:
Chemical bonds include covalent, polar covalent, and ionic bonds. Atoms with relatively similar electronegativities share electrons between them and are connected by covalent bonds. Atoms with large differences in electronegativity transfer electrons to form ions. The ions then are attracted to each other.
Explanation:
Answer:
The answer is because they are in free fall. In a vacuum, gravity causes all objects to fall at the same rate. The mass of the object does not matter. If a person drops a hammer and a feather, air will make the feather fall more slowly. But if there were no air, they would fall at the same acceleration.
Explanation:
Answer: lysosome is a membrane-bound cell organelle that contains digestive enzymes. They are involved with various cell processes. And they break down excess or worn out cell parts. They may be used to destroy invading viruses and bacteria.
Explanation:
The answer is not A because mutations can carry out bad genetic variations.
The answer is not B because mutations can carry out good genetic variations.
So, the answer is C because mutation is one of the key factors of genetic variation. (mutations can also have no affect)
Answer:
nitrogen that cannot be used