In a plants stem the vascular tissue is a. is always arranged in rings of vascular bundles b. is continuous from the roots to thel leaves c. carriers nutrients up the stem but not down d. plays a role in photosynthesis and storage.

Give the biological term for: structures that display characteristics of living organisms only within living cells

Which best describes the nucleus of an atom a. it is where all of the particle s of the atom are located b. it is the negatively charged part of the atom c. it is where the electrons and the protons are located d. it is the part of the atom with the greatest mass

Which of the following is an eon in the time scale? phanerozoic proterozoic archean all of the above