By forming tough,inactive cysts,Giardia...
A.Survives in unfavorable conditions
B.Gets energy from the sun
C.Maintains a constant temperature
D.Responds to stimuli,sun as chlorine
I'm thinking A
Please put your subject matter in your post, not "homework."
Well I don't really know what subject this is :/
What class are you taking that asked this question?
Ms. Sue my friend asked me this question. I don't know what classes she takes.
I believe it may be biology, not sure.
It looks like biology.
I presume it is. But do you think the answer is A?
No. Ask your friend what his/her assigned text materials say.
The correct answer is A. Survives in unfavorable conditions.
To arrive at this answer, let's break down the question and the options provided.
The question asks about "forming tough, inactive cysts" in relation to Giardia. This refers to a survival mechanism exhibited by Giardia, a microscopic parasite that can infect the intestines of humans and animals.
The options provided are:
A. Survives in unfavorable conditions
B. Gets energy from the sun
C. Maintains a constant temperature
D. Responds to stimuli, such as chlorine
Looking at the options, Giardia forming tough, inactive cysts is not indicative of getting energy from the sun (option B) or maintaining a constant temperature (option C). Giardia is a single-celled organism and does not possess the ability to perform photosynthesis or regulate its body temperature in the way that higher organisms do.
Option D suggests that Giardia responds to stimuli like chlorine. While it is true that Giardia can be effectively killed by disinfectants like chlorine, this option does not directly address the formation of cysts.
Hence, the most appropriate answer is A. Giardia survives in unfavorable conditions by forming tough, inactive cysts. When conditions become less favorable (such as during exposure to chemicals or changes in temperature), Giardia can encase itself in a protective cyst, allowing it to withstand harsh environments and facilitating its survival until conditions become more suitable for growth and reproduction.