The reaction in which calcium carbonate produces calcium oxide and carbon dioxide is: CaCO3 = CaO + CO2. Thus, the third option is the right one.
The breaking down of calcium carbonate to calcium oxide and carbon dioxide is called DECOMPOSITION REACTION. A decomposition reaction is a type of reaction in which a single element is broken down into two or more elemental parts, which are less complex than the parent compound.There are three types of decomposition reaction, these are thermal, photo and electrolytic decomposition reactions.
High energy, high wind conditions :)
Members of the phylum Echinodermata lack the following body system:
- Excretory organ,
- Brain,
- And also no respiratory pigment in their blood
Most of the common marine invertebrates that you see in the aquarium or on the beach all belong to the phylum called Echinodermata.
<h2>Further Explanation</h2>
Some of the examples of these marine invertebrates animals include sea urchins, starfish, sand dollars, basket stars, brittle stars and many more.
Echinodermata is a word that is derived from the Greek word “spiny fish” and this word best describes these animals because most of them are covered with bumps, for example, sand dollars and sea cucumbers are covered with one form of bumps or another.
However, Echinodermata bodily system lacks the following:
- They do not possess a specialized excretory system
- They lack brain
- Their blood does not contain respiratory system
- They also lack excretory organ and diffuses wastes out into the outside environment through their respiratory surfaces.
These invertebrate animals are marine species: they live only in salt water and there are none of their classes that reside on the land.
They are found almost at every ocean and the largest of animals that do not reside either on land or freshwater.
Most of these animals can reproduce sexually and can also restore or regenerate some of their lost body part such as the limbs and tissue.
LEARN MORE:
KEYWORDS:
- phylum echinodermata
- fresh water
- marine habitat
- starfish
- sand dollars
<span>The fertilized egg stays in the fallopian tube for about 3 to 4 days. But within 24 hours of being fertilized, it starts dividing fast into many cells. It keeps dividing as it moves slowly through the fallopian tube to the uterus. Its next job is to attach to the lining of uterus.</span>
