Comment les cellules du système immunitaire circulent-elles dans le corps?

Describe the function of the endomembrane system? what organelles are involved?

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).

Babies with very low or very high birth weight are less likely to survive. observe a graph of the data.