Explain the difference between a triglyceride and a phospholipid. How the replacement
Does phosphate alter the chemical properties of lipid?

A triglyceride and a phospholipid basically differ by the number of fatty acids present in them. A triglyceride is composed of three fatty acids; whereas, a phospholipid has two fatty acids. Additionally, a phospholipid has a phosphate group that is attached to a glycerol group

Explanation:

A phospholipid is formed when one fatty acid of the triglyceride group gets replaced by a phosphate group.  

The head of a phospholipid is hydrophilic and polar; while the tail is hydrophobic and non-polar.  

This property facilitates the phospholipids present in cell membranes  

The hydrophilic head of the phospholipids present in the cell membranes faces outward to interact with the intra and extracellular fluid; while the hydrophobic tail faces inwards into the cell. This property helps it to provide selective permeability during cellular transport.

fertilization, pictured in figure 24.23a is the process in which gametes (an egg and sperm) fuse to form a zygote. the egg and sperm each contain one set of chromosomes. to ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. in mammals, the egg is protected by a layer of extracellular matrix consisting mainly of glycoproteins called the zona pellucida. when a sperm binds to the zona pellucida, a series of biochemical events, called the acrosomal reactions, take place. in placental mammals, the acrosome contains digestive enzymes that initiate the degradation of the glycoprotein matrix protecting the egg and allowing the sperm plasma membrane to fuse with the egg plasma membrane, as illustrated in figure 24.23b. the fusion of these two membranes creates an opening through which the sperm nucleus is transferred into the ovum. the nuclear membranes of the egg and sperm break down and the two haploid genomes condense to form a diploid genome.

explanation: