Which characteristic of a phospholipid contributes to the fluidity of the membrane?
its head
cholesterol
a saturated fatty acid tail
double bonds in the fatty acid tail

Double bonds in the fatty acid tail is the characteristic of a phospholipid contributes to the fluidity of the membrane .

Explanation:

Phospholipid -

The phospholipid has a hydrophobic region or the water hating , and is a non - polar region , hence , it can interact with the non - polar molecules in a chemical reaction .

And phospholipid has a hydrophilic region or the water loving , and is a polar region , hence , this region can form hydrogen bond with water .

Hence ,

When , a phospholipid is placed in water , it forms a ball or a cluster .

The two hydrophobic tails and the hydrophilic head together forms a phospholipid molecule .  

The hydrophilic region have a  phosphate-containing group which is attached to the glycerol molecule and the hydrophobic tails have unsaturated fatty acid and are the long chain hydrocarbon .

type 2 happens when excess consumption of high-sugar foods flood the blood supply with glucose and reduce the production and effectiveness of insulin. if a person has prediabetes, they can reduce the risk of full diabetes through regular exercise and a balanced, low-sugar diet.

answer:   option a) glucagon was secreted by his pancreas before he ate the cookies because blood glucose was low. insulin was secreted after he ate the cookies because his blood glucose was high.

explanation: