Why are the beak sizes and shapes of Darwin’s finches different?

Which of the following structures is not found in both plant and animal cells? a) chloroplast b) cytoskeleton c) ribosomes d) mitochondria

What molecules will be best used to compare different species with the exact same sequence of amino acids? why would two species have the same protein even if the molecules in question is different? (hint: transcription to translation to protein).

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm