Answer:
Animals need food, water, shelter, and space to survive
No, he is not correct. Xenon is not very reactive since it is located in the group of noble gases.
Answer:
The answer is 'D'- Unusual number of sick or dying people.
Explanation:
Biological incident can be defined as <em>diseases which occur naturally in humans or are spread through terrorist motives</em>. There are lot of red flags which should be noticed before the disease reaches a peak limit.
The first sign of a biological incident will be reported by the medical authorities as there will be a <u>large number of people getting sick or dying</u>.
Either the deaths will be caused due to spread of a communicable disease or a biological agent has been released on purpose.
In flatworms, the PHARYNX is used to gather food.
The digestive system of the flatworm is made up of the mouth, the pharynx and gastrovascular cavity. The pharynx is a muscular tube through which the flat worm can suck food into its gastrovascular cavity. Food normally passes from the mouth through the pharynx and then into the intestine where the food get digested by the cells lining the intestine walls.