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.
It is impossible as there is a loss of energy between the transfer of energy between flogs and <span>mosquitoes. This ecosystem would never be sustainable or in equilibrium. There is also no primary producer within this ecosystem. No ecosystem can exist without some initial source of energy that would be obtained using solar or chemical energy. For terrestrial ecosystems, plant primary producers would normally provide the initial energy into the ecosystem. </span>
Corynebacterium is the answer I believe
