I don't know, maybe because of the way we see animals. Not as our equal parts
<span>Phase of a writing strategy which involves deciding on the topic and the purpose of the essay is A. prewriting. During prewriting, which is similar to brainstorming, you just want to decide what you want to write about. Here, you may write as many ideas as you can, take some notes, and later on choose which ones you will incorporate in your text, and which ones you will discard. </span>
They are semi-permeable because they can diffuse and pass through the plasma membrane easily.