Which of the statements is not true regarding protists? Some are unicellular. They may have cell walls. They are usually aerobic, though some are not. They may be photosynthetic. They may be prokaryotic.

They may be prokaryotic is false.

Explanation:

Protists are eukaryotic organisms i.e they have membrane bound organelles and Nucleus. They are neither plants,animals or fungus. Protists have many form of nutrition and they may be aerobic or anaerobic.

Some protists photosynthesized like algae while others are heterotrophs

They may be unicellular or multicellular.

Some protists have cell walls while others don't.

the answer is "a.) well–developed vascular system."

explanation:

answer:

the water molecules are transferred from the roots to the stem or top parts of the tall tree because of important properties of water which are adhesion, cohesion and capillary action. cohesion is the property of water molecules keeps water molecules in a combined state by sharing of bonds between them at the atomic level. adhesion allows the interaction of water molecules with other substances or substrate. adhesion will cause the attachment of water molecules to the wall of the vessel (xylem) of the plant. capillary action occurs when the adhesive force to the vessel wall is stronger than the cohesive force between water molecules. capillary action mimics the transfer of water from a tube or pipe. in this way water utilizes its property to transfer water from down to top level of the plant.