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VLD [36.1K]
3 years ago
12

Giardia exists in two forms--cysts and trophozoites. While both are required for the life cycle of Giardia, only the cyst is con

sidered infectious. Why is the cyst considered the infectious form of Giardia
Biology
1 answer:
hram777 [196]3 years ago
6 0

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.

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Microscopic droplets of water in the air grow larger as water vapor continues to condense . What might happen next
11Alexandr11 [23.1K]

Answer:

Clouds are formed.

Explanation:

  • When water evaporates from the surface of the water bodies it rises up where it faces colder temperature.
  • Water vapor condenses to form tiny droplets of water.
  • As these droplets combine together they form a heavier mass of water droplets.
  • These forms the rain bearing cloud.
  • When these clouds get laden with water the water droplets fall as rain.
4 0
3 years ago
What does a plant need to create a glucose molecule in photosynthesis?
irga5000 [103]

Answer:

The correct answer is D

Explanation:

The equation of the process is:.

Co2 + H20+ light  -> Glucose(C6H12O6) + 02 (is released) + H20.

The energy of light is harnessed through a plant pigment called chlorophyll, Co2 is obtained from the air and the water is obtained from the roots, transported by the leaves.

5 0
3 years ago
Read 2 more answers
Phổi phải to và dài hơn phổi trái đúng không
mariarad [96]

không, tùy người thôi

nhưng thường hai phổi bằng nhau

tùy kiểu bạn thở ở mũi nào

3 0
3 years ago
if you found piophila casei and bone eating beetles on a body, what could you say about the time of death
IRINA_888 [86]
Well, both tend to feed on already decaying things, so I'd say that the body is at least 20 to 50 days after death. Beetles normally take over around that time because maggots can no longer get through the dry tissue.
7 0
4 years ago
Examine this image and choose the most accurate statement base on relative dating.
Vlada [557]

Hello!

One of the most basic examples of relative dating, specifically in this case, would be the law of superposition. This simply states that out of many layers of rock, the oldest would be at the bottom and the youngest on top, so therefore the age of the fossils inside the rock would also increase when going down the layers. Therefore, we see that layer a is the oldest, and layer g is the youngest.

This disproves the first answer choice - the fossils in layer g are the youngest, not the oldest. Now, when comparing Layer F and D, we see that the rock layer F is above layer D. This means that layer F is younger than layer D (and same for the fossils in those respective layers). The third choice is incorrect as layer A would be older than F as it is beneath layer F.

Therefore, this means your second choice, or the fossils in layer F are newer than the fossils in layer D, is correct.

Hope this helps!

3 0
4 years ago
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