Unsaturated and saturated lipids exhibit different characteristics based on their structures. which characteristic is unique to saturated fats?
forms covalent, carbon-to-carbon bonds
is a liquid at room temperature
contains the maximum number of hydrogen atoms
consists of fatty acids and a carboxyl group

The right answer is contains the maximum number of hydrogen atoms.  

A saturated fatty acid is a fatty acid having carbon atoms fully saturated with hydrogen (see figure). Each carbon carries as many hydrogens as possible. We can not add hydrogen to the molecule: it is saturated.

All the bonds between the carbons are simple (no carbon-carbon double bonds).

Saturated fats, a type of lipid, are triglycerides obtained by reacting three molecules of saturated fatty acids on a molecule of glycerol.

Contains maximum of hydrogen atoms.

The saturated fatty acid has only hydrogen bonds and unsaturated fatty acid is double or triple bonds.

The unique feature of saturated fatty acids is that it contains only hydrogen bonds. This means it has maximum number of hydrogen in it as compared to that of the unsaturated fatty acid.

Both consists fatty acids and carboxyl group and forms carbon-carbon bond.

The difference is hydrogen bond present in the saturated fats.

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.

the correct answer was location c, because earth is tilted away from the sun at this time