More info please? Maybe a pic and the answer choices :)
<span>The question says, vertebrates have notochord during early embryonic development. The statement is true. A notochord is a cartilaginous skeletal rod which support the body in all embryonic and some chordate animals. It has essential role in vertebrate development. It is a primitive beginning of the spinal cord.</span><span />
I wouldn't know how to solve this question since I don't have all the information given to solve this problem. But I'm going with a hypothesis, but if given more information I would be glad to help.
Answer:
A protein is a long chain of amino acids folded in to a specific shape
Relative dating is used to determine a fossils approximate age by comparing it to similar rocks and fossils of known ages. Absolute dating is used to determine a precise age of a fossil by using radiometric dating to measure the decay of isotopes, either within the fossil or more often the rocks associated with it.
That's how you know the age of fossils hope this helps diamonds in the name