biology

• The cell membrane is a selectively permeable barrier that separates the cell from its environment.
• active transport moves against the concentration gradient (low to high)
• osmosis is passive transport
• diffusion is passive transport
• active transport moves particles against the concentration gradient like minerals to roots.
• diffusion moves substances or particles from high to low concentration gradient.
• diffusion requires no energy.
• osmosis requires no energy
• active transport requires energy respiration.
• cell membrane controls what goes in and out of the cell.
• chloroplast is needed for photosynthesis.
• the nucleus contains DNA .
• the cell membrane acts as a support and maintains the shape of the cell.
• ribosomes provide protein for the cell.
• cytoplasm is where chemical reactions take place
• mitochondria is needed for energy and respiration the the cell.
• the cell wall acts as a physical defence and structure support to cell.
• eukaryotic is dna in nucleus
• plant and animal cells are eukaryotic
• prokaryotic is dna not found in nucleus
• bacteria has a plasmid ring of dna