3(multiple choice worth 4 points)

(02.04 lc)

identify the selectively permeable barrier of the cell that allows certain molecules to enter and exit the cell?


  a  c  e  f

F- cell membrane

Explanation:

The cell membrane is a selectively permeable barrier of the cell that allows certain molecules to enter and exit the cell. The cell membrane consists of phospholipids and proteins. The phospholipids occur in two layers forming a lipid bilayer. Some proteins transverse the membrane lining pores through which certain substances pass.

a few examples of ethical concerns involving genetically engineering of humans include

-privacy of genetically tested people

- potential side effects

-long term effects

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.