B. Clade 1 is ancestral to all the other clades
Humans are warm blooded and can't be cold blooded because of the environment we live in. We can't sit still during the winter and soak up warmth from the sun.
Answer:
B tissue level
Explanation:
B tissue because whatever substance that got into the lungs will cause the tissue to swell up causing an asthma attack
Science can be used to address societal issues and to inform policies. Hope I Helped :)
Answer: transfer RNA
Explanation: Brainliest please