Name
section 4: diffusion and osmosis
study guide b
key concept
materials move across membranes because of concentration differences
vocabulary
passive transport
diffusion
concentration gradient
osmosis
isotonic
hypertonic
hypotonic
facilitated diffusion
main idea: diffusion and osmosis are types of passive transport.
1. what is a concentration gradient?
2. what does it mean for a molecule to diffuse down a concentration gradient?

Answer No 1:

A concentration gradient can be described as a phenomenon by which molecules travels from an area which is highly concentrated to an area which has low concentrations of that molecule.

Answer No 2:

A molecule is said to be diffusing down a concentration gradient when molecule acquire the phenomenon of concentration gradient i.e move from higher concentration to lower concentration. This mechanism is also termed as passive transport. Active transport is the opposite of passive transport. In active transport, molecules move against the concentration gradient i.e from an area of lower concentration to an area of higher concentration.

hi, natural selection of the peppered moth during the industrial revolution in 19th-century england is an example of an outlier in the study of evolution. during this time, pollution from factories filled the forests, coating trees in a layer of soot—turning white trees black

mark as brainlest

gokuson

age range would be the answer