Proteins are made from amino acids
Answer: Bones cells secrete an extracellular matrix that when combined with minerals becomes rock hard.
Explanation:
B. Coding sequences that regulate gene expression
If I’m not mistaken, A & C is intron.
Answer:
The biosphere is made up of the parts of Earth where life exists.
They are composed of living organisms and the abiotic factors
Explanation:
So B is correct :)
