The element starts off as 100%. half of 100% is 50% and half of 50% is 25%. the element has emitted 2 times the half life which is 10,000 x 2 = 20,000
the fossil bone is 20,000 years old
In DNA Nucletide monomer are linked to the next through covalent bonds
Hope this helps!
I think it’s 3 but I did this type of stuff 2 years ago so I can’t guarantee
It is either carcinogens or viruses (I think the first) I hope this helps!
Answer:
Red foxes
Explanation:
The arrow shows the transfer of energy from the shrew to the red fox
