Answer:
Red blood cells are adapted to their function by:
1) They contain haemoglobin - a red protein that combines with oxygen. they have no nucleus so they can contain more haemoglobin.
2) They are small and flexible so that they can fit through narrow blood vessels.
3) They have a biconcave shape (flattened disc shape) to maximise their surface area for oxygen absorption.
Hope this helps! :D
C) no till farming I believe is the correct answer
A change in allele frequencies.
A mountain lion should have wider bone rings because it has a higher metabolic rate, and thus a faster growth rate
: )
D.They both contain carbon, but only nucleic acids contain phosphorous.
