A phospholipid is structurally similar to a triglyceride except that in a phospholipid, a charged phosphate group replaces one of the

The correct answer is - fatty acid.

Explanation:

A phospholipid is a one of lipid molecule which is present as major component of cell membrane, that plays a significant role. Phospholipids allow for selective passage of ions and other molecules through the cell membrane.

Phospholipid is structurally similar to triglyceride except that it is made up of two fatty acids instead of three fatty acid, in phosphoplipid third fatty acid is replace wit a phosphate group, however, glycerol molecule present in both.  The phosphate group of the phospholipid is negatively-charged which makes it polar or hydrophilic head, .

Thus, the correct answer is - fatty acid.

answer: - few nutrients

high pressure

low temperatures

explanation: 1. few nutrients:   open-ocean zone is located way far from the land, which is the main source of the essential nutrients.2. high pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.3. ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface. 4. varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.5. low temperatures:   the temperature of open-ocean zone ranges from a low of -2°c to an average of 17°c

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.