The answer is a because without them our veins would be dead
A=t g=c so if you have gta-gca the opposite strand would be cat-cgt.
That is a simile because you are saying you are like something. It means that you will fall down easily like a domino would if you knocked it.
Answer:
A sugar called deoxyribose.
Explanation:
DNA is made up of molecules called "nucleotides". These are:
- A phosphate group
- A pentose sugar [deoxyribose]
- A nitrogen-containing base [adenine, thymine, guanine and cytosine]
Thus the first option is the right answer.
Reasons why the other options are wrong:
"A plasma called haemoglobin" is wrong as plasma and haemoglobin are related to the blood.
"A chemical called nucleic acid" is wrong as it is not what DNA's made up of. DNA and RNA are nucleic acids themselves.
"An acid called chlorophyll" is wrong as chlorophyll is related to plants.
Answer:
D.
Explanation:
When an arrow points from a seal to a shark it means the shark is recieving energy from that seal. (By eating it.)
