A quadrilateral has 4 sides and each angle is 90 degrees therefore the sum would be 360 degrees
The membrane's lipid bilayer structure provides the first level of control. ... Passive transport is the movement of substances across the membrane without the expenditure of cellular energy. In contrast, active transport is the movement of substances across the membrane using energy from adenosine triphosphate (ATP).
Hi!
I believe the answer is letter D.
Hope this helps!
-Payshence xoxo
Photosynthesis and respiration are interrelated as stated in the last option
She discovered that folate was crucial to sperm development. <span>It has been found that folate may have been the driving force behind the evolution of darker skin, factors such as clothing and climate affect the evolution of skin pigment. </span>
