14. The egg has several protective layers. The egg shell is called as calcite. Hens have incubation period of 21
days and hens sits on eggs for several days. At last, the egg hatches.
(a) What is calcite?
(b) Define incubation period.
(c) Why does hen sits on eggs?
(d) What is hatching?
Answers
Answer:
Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate. The Mohs scale of mineral hardness, based on scratch hardness comparison, defines value 3 as "calcite". Other polymorphs of calcium carbonate are the minerals aragonite and vaterite
Explanation:
Answer:
Explanation:
Calcite as Limestone and Marble. Limestone is a sedimentary rock that is composed primarily of calcite. It forms from both the chemical precipitation of calcium ...
the period over which eggs, cells, etc. are incubated.
When the hen sits on the eggs, she heats the eggs to 100° F to 101° F. The hen turns the eggs on a regular basis by using her beak to scoop under the egg and roll it toward her. The humidity comes from the environment, the hen's body, and any moisture she transfers back to the nest on her feathers.
Hatching of eggs refers to the production of baby chicks. In early days eggs were hatched by placing them under broody hens. ... Incubators, which provide similar environment as that of broody hens, but more efficiently, are used at present for hatching of eggs.