Name the appendages found on the head of a crayfish and tell the function of each crayfish

Draw the structure of dna nucleotide with adenine as nitrogenous base

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).

What's the waste product of electrons and pyruvate combining in fermentation?