Answer:
Well, where are you? It's probably because we're all under quarantine. Social distancing sucks, you start to go crazy being alone. I'm sure it's just because you can't go do things or interact with people.
You would weigh less on Mars than on Earth because there's less gravity on Mars
Answer:
D
Explanation:
It is often like this: cell->tissue->organ->system
8. Arteries carry oxygenated blood from the heart to the rest of the body, while veins carry deoxygenated blood from the body, back to the heart. Arteries are thick and muscular, while veins aren't as thick, and they have valves.
Answer: Missense mutation
Explanation:
Missense mutation is a type of point mutation where a single nucleotide is changed to cause substitution of a different amino acid. This in turns render the resulting protein non-functional.
In the case of sickle-cell disease, the sixth amino acid in the gene sequence, glutamate (GAG) is substituted with valine (GUA), due to Adenine nucleotide changed to Uracil nucleotide. Thus, missense mutation has occurred
