To catch them :) hope this helps
Answer:
Because the trophozoites are unable to survive outside a host.
Explanation:
The term infectious is used for a disease or microorganism that can be transmitted from one organism to the other organism through the environment. If we look at the two forms of Giardia, we find that out of the two forms viz. cysts and trophozoites, only the cysts of Giardia have the ability to remain alive in the environment outside the host and thus they are able to be transmitted to the other organisms. On the other hand trophozoites are not able to survive in outside environment so there is no chance of transmission of trophozoites.
That's how the food chain works. There isn't much to it.
Select the correct statement about lymph transport.
Lymph transport is faster than that occurring in veins.
Under normal conditions, lymph vessels are very high-pressure conduits.
Lymph transport is only necessary when illness causes tissue swelling.
Lymph transport depends on the movement of adjacent tissues, such as skeletal muscles.
