Which of the following statements is correct about diffusion?
it involves movement of water molecules only
Molecules move from a region of higher concentration to a region of lower concentration
differentially permeable membrane must be present for diffusion to occur
It involves when a solute can no longer dissolve in a solvent of only solute molecules into the Bowman's capsule
It occurs when a solute can no longer dissolve in a solvent
Correct answer is B
No explanation has been provided for this answer.
The mechanism of gaseous exchange in living organisms is essentially by
osmosis
inhalation
diffusion
exhalation
breathing
Correct answer is C
No explanation has been provided for this answer.
The organelle that eliminates water from the body of protozoa is
plasma membrane
contractile vacuole
cell wall
protoplasm
nucleus
Correct answer is B
No explanation has been provided for this answer.
The cell is a functional unit of living organisms because
multicellular organisms are made up of cells
all cells in a multicellular organism function as a single cell
the function of a multicellular organism is the sum total of the functions of its constituent cells
the function of a single cell is superior to that of the multicellular organism
the cells of a multicelullar organism are structurally similar
Correct answer is A
No explanation has been provided for this answer.