Active transport requires energy to transfer material in and out of the cell.
Passive transport is automatic and does not require energy.
Examples of Active: Endocytosis and Exocytosis.
Examples of Passive: Facilitated Diffusion, Simple Diffusion, and Osmosis.
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I would say D. Osteoarthritis, presbyopia
Answer:
An element is a material that consists of a single type of atom. Each atom type contains the same number of protons. Chemical bonds link elements together to form more complex molecules called compounds. A compound consists of two or more types of elements held together by covalent or ionic bonds.
Explanation:
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Type of symmetry in which body parts are arranged in a circle around a central point is called radial symmetry.
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This type of symmetry is characteristic for the sessile animals like Cnidaria and Echinodermata. Organisms with radial symmetry have no left or right sides, they have a top and a bottom surface, or a front and a back.</span>
