The digestive system of arthropods works not far from how a human being eats and digests food. They have appendages close to their mouths that they utilize to let the food move into their body, whether it's plant matter or another living thing. With each individual kind, the parts of their mouth varies depending on the type of food they eat.
Explanation:
For question no 19
Force (F) = 20N
distance (d) = 5m
Work = F * d
= 20 * 5
= 100 J
Now
For question no 20
D. No matter how much force is applied the object must have motion for work to be done.
Answer:The Questions is not clear enough. Probably a diagram is needed to
Explanation: