When some substances can pass across them but others cannot biological membranes are said to have?

The biological membranes like the cell membrane or the membrane enclosing the organelles are all semi-permeable. The semi-permeability is the property of membranes that gives them the ability to selectively allow the movement of particles/ solute/ solvent across it. The semi-permeability allows the cell to maintain a concentration gradient across its membrane that further drives various cellular processes within the cell.

post-impressionism is a predominantly french art movement that developed roughly between 1886 and 1905, from the last impressionist exhibition to the birth of fauvism. post-impressionism emerged as a reaction against impressionists' concern for the naturalistic depiction of light and colour.

explanation:

tsd is temerature dependent sex determination.

tsd: it is a type of environmental sex determination in which the temperature experienced during embryonic/ larval development (ambient temperature for development) determine the sex of the offspring.

crocodile displays the tsd where the ambient temperature of the developing egg determines the individual's sex. for example in the american alligator's eggs, incubation at 33 ºc produces mostly males, while incubation at 30 ºc produces mostly females. so if the american alligator's egg will get the ambient temperature (33 degree celcius)during embryonic development from egg, the offspring will be male and same for the female sex determination.