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.
Kinetic chain checkpoints represents the six anatomical locations of predictable movement patterns and is denoted as option B
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What is Kinetic chain checkpoints?</h3>
These are groups of body segments, connecting joints, etc which have a connection to the spine in the human body.
They work together to ensure body parts are easily moved and makes the detection of movement dysfunctions easier.
Read more about Kinetic chain checkpoints here brainly.com/question/789840
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(B it breaks down carbon- base sugar molecules to release energy and forms carbon dioxide
