The cell membrane consists of a lipid bilayer with embedded proteins. What is one reason that proteins are essential for the cell membrane to function properly? Proteins attach the cell membrane to the cell wall.
O Proteins prevent the cell membrane from breaking apart in water.
O Proteins allow certain substances to pass through the cell membrane.
O Proteins prevent gases, including oxygen and carbon dioxide, from passing through the cell membrane.

Some mining processes involve removal of large areas of earths surface in the mined region this practice causes severe environmental damage by allowing which natural process to accelerate in the affected areas? a.precipitation b.erosion c.migration d.condensation

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

Select the correct answer. which mutation is harmful to the organism? a. a mutation allowing moths to camouflage better on blackened tree bark b. a mutation making staphylococcus aureus resistant to the antibiotic methicillin c. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell d. a mutation causing uncontrolled cell division e. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them