In the photosynthesis lab, the chromatography solvent was meant to destroy the pigments. True
False

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?

When you run, you begin to breathe heavier and faster. your heart beats more quickly, bringing more oxygen to your cells. which organ systems are working together here?

Prokaryotic and eukaryotic cells are different in many ways other than the presence or absence of a nucleus. if both archaebacteria and eubacteria are prokaryotic cells, then why are archaebacteria more closely related to eukaryotic cells than they are to eubacteria?