Answer:
Gastrula
Explanation:
A hollow shaped embryonic structure formed after two weeks of fertilization with three layers is known as gastrula.
The gastrula is formed from the repeated division of the single-layered structured called blastula which later forms three layers called ectoderm, endoderm and mesoderm.
These layers during the process of gastrulation from different organs of the multicellular organisms like the endoderm forms the liver, the ectoderm form the nervous system, the skeletal bone and many others.
Since gastrula structure contains three dermal layers therefore gastrula is the correct answer.
Greenhouse gases contributes the most
Answer:
Jet streams are very important during the weather prediction and other related aspects.
Explanation:
- Jet streams are important because they have the greatest aid in determining weather patterns all around the world.
- Meteorologists get help from jet streams to forecast weather by their position examination.
- They also carry great importance in air travel because flying in or out of them can greatly decrease the time of travel in air and fuel usage too.
- Separation of colder air from warmer air is done by the jet streams.
