Undigested food will be diffused from the surface of skin and reproductive cells come out of the mouth in aurelia.
Explanation:
The gastro vascular system in aurelia helps remove carbon dioxide and waste material from aurelia as there is no specialised excretory system. The waste material is diffused out through general body surface.
Aurelia are dioceous which means sexes are separate. Four gonads of either sex lie radially on the floor of gastric pouches. The gametes when ripened gets shed in the stomach from gonads and comes out of the mouth.
The spermatozoa shed by the mouth in seawater gets carried to the body of female by mouth. The fertilization takes place in gastric pouches.
Answer: Biosynthesis is a multi-step, enzyme-catalyzed process where substrates are converted into more complex products in living organisms. In biosynthesis, simple compounds are modified, converted into other compounds, or joined together to form macromolecules. This process often consists of metabolic pathways.
Answer: Option B.
A see saw, chin raise.
Explanation:
A lever is a machine that can rotate and consist of a beam which is pivoted to fulcrum.
There are three classes of lever, the first class lever, second class lever and third class lever. These three classes of lever are classified base on the positions of effort, fulcrum and Load.
In first class lever, fulcrum comes between the effort and load. Examples is scissors , see saw, pliers. This is because effort is applied on the one side of the fulcrum and load is on the other side. Therefore, the childhood demonstration of first class lever motion is see saw and chin raise.
In the second class lever, load come between effort and fulcrum e.g wheelbarrow, bottle opener.
In the third class lever, effort comes between fulcrum and load e.g hammer, broom.