While on a field trip near the ocean coastline, you visit a company that harvests jellylike substance from protists. This substance can be used as food, or in biology lab dishes for culturing organisms that have red-blue pigments, and store starch like plants. The company extracts the substance from multicellular plant-like organisms. You are observing the economic values of
(A) algin.
(B) gelatin.
(C) carrageenan.
(D) red ooze.
(E) agar.

Agar

Explanation:

In the given question, the substance obtained from a multi-cellular organism with its plant-like and stores starch like a plant is the algae.

Many useful substances are obtained from these algae whose characteristics are given are like they are jelly-like, used as food, used to grow the cultures of organism shows the properties of a chemical called agar.

Agar is obtained from the species of genus Gelidium and the Gracllaria red algae which are plant-like organisms.

Thus, agar is the correct answer.

answer: zinc is the substance which has a volume of 1.38 .

density is defined as the mass of an object per unit volume.

it can be calculated by dividing mass of a substance by its volume i.e.

si unit of density is kg per cubic meter and cgs unit of the same is gram per cubic centimeter.

now from the given data volume can be calculated by the formula .

hence, the volume of aluminium will be = which comes out to be 1.703 .

similarly, volume of zinc, chromium, and nickel will be 1.378 , 0.869 , and 0.356 respectively.