State two reasons why some molecules can pass through a certain membrane, but other molecules can not.

Size and polarity

Explanation:

I can think of two reasons:

Size — the molecules may be too big to pass through the pores of the membrane Polarity — polar molecules and ions cannot pass through a nonpolar membrane.

Tamarind can be grown on homesteads, plantations, and wasteland or as a forest tree. methods of propagating tamarind there are two methods of propagating tamarind trees: seed propagation and vegetative propagation. seed propagation: it involves the collection, preparation and direct planting of the seed.answer from google full credit to google.