Question

select the two sentences that use the word correctly. after you have made your choices, press the check it button. membrane the membrane of the book defeated the villain. the trucks wheels bogged down in the membrane. the girl put on a membrane since it was cold outside. a plant membrane has a firm cell wall. one kind of membrane helps the knee and shoulder move freely.

Explanation:

A membrane is a thin layer of tissue or material. In biology, plant cells have cell - membranes and there are membranes in joints like the knee and shoulder that aid movement. The first three sentences use "membrane" incorrectly as a book doesn't have a membrane in the relevant sense, wheels don't get bogged down in a membrane, and you don't put on a membrane for cold. The fourth sentence correctly refers to a plant membrane and the fifth sentence correctly refers to a membrane in joints.

Answer:

A plant membrane has a firm cell wall.
One kind of membrane helps the knee and shoulder move freely.