Membranes allow some materials to pass while constraining the movement of other molecules.

Semi-permeable

Explanation:

This means it is selective of the molecules it allows to pass through it. Most cells have a semipermeable membrane made of phospholipids. The membrane has pores small enough to allow water molecules to pass through (and anything smaller) but restricts larger molecules such as ions. In addition, polar molecules will find it difficult passing through the membrane on their own due to the hydrophobic inner layer of the phospholipid bilayer structure of the membrane. These molecules require the assistance of transmembrane protein channels.

answer: although many types of viruses can cause a common cold, rhinoviruses are the most common culprit. a cold virus enters your body through your mouth, eyes or nose. the virus can spread through droplets in the air when someone who is sick coughs, sneezes or talks. theres your answer

explanation:

answer: national resource conservation services

national resource conservation services is the us. based approach that provides technical and financial assistance for natural resource management. nrcs society in conservation of resources by involving in activities like farmland protection, flood prevention, watershed protection, urban conservation, conserves economic and environmental conditions. it conducts soil surveys and implements the policy of natural resources management on the society.