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STALIN [3.7K]
3 years ago
10

Pre-Lab Questions What are two ways that some prokaryotes are able to survive in extreme environments? Describe three ways that

microorganisms in soil contribute to the ecosystem as a whole. Give two examples of genera that produce endospores, and explain why they are important in human health. What are coliforms? Why are they important in assuring water quality? Why is E. coli the indicator bacterium for fecal contamination?
Biology
1 answer:
il63 [147K]3 years ago
7 0

What are two ways that some prokaryotes are able to survive in extreme environments?

Answer:

1. Presence of thick cell wall in prokaryotes help them to survive in hypo-osmotic and hyper-osmotic conditions.

2. Production of endospores by bacteria. Bacteria use these structures to produce off sprigs because these structures are heat and drought resistant. They germinate when the conditions became favorable for growth.

Describe three ways that microorganisms in soil contribute to the ecosystem as a whole.

Answer:

1. As decomposer return the nitrogen contents back to ecosystem.

2. Bacteria detoxify may harmful substances present in water bodies therefore some species of bacteria are used for bio-remediation of ecosystem.

3. Bacterial byproducts help plant to grow faster because these byproducts act as stimuli for plant growth.

Give two examples of genera that produce endospores, and explain why they are important in human health.

Answer:

Endospore Producing Genus:

Bacteria belongs to genus Bacillus and Clostridium produce endospores.  

Importance for humans.:

1. Bacillus species are used to produce antibiotics, metabolites, enzymes which help in curing human diseases.

2. While species of Clostridium cause food poisoning in human.

What are coliforms? Why are they important in assuring water quality?

Answer:

Coliforms are gram negative bacteria have road like shape found in spoiled water.  

Importance:

These bacteria are important indicator of polluted water therefore in water quality testing their presence tells us about the water quality that how much is this water polluted.

Why is E. coli the indicator bacterium for fecal contamination?

Answer:

E. Coli found in the intestine of humans. As E. Coli itself does not cause mild infections therefore its presence indicates the presence if other deadly pathogens which may cause dangerous diseases to human.

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11Alexandr11 [23.1K]

Answer:

I don't really know sorry

6 0
2 years ago
Which two of the following best describes what is happening in the picture?
MrRissso [65]

Answer:

A and D I think

Explanation:

It's not erosion, so that is out of the answer choices. And I doubt it is crystallization, so that is why I think it is A and D. (correct me if I am wrong.)

8 0
3 years ago
What is true of saturated fatty acids?
anzhelika [568]

<u>Answer:</u>  They have the maximum number of hydrogen atoms.

<em>Saturated fatty acids have the maximum number of hydrogen atoms.</em>

<u>Explanation:</u>

A fatty acid that doesn’t contain any double bond between carbons in their molecular structure is known as saturated fatty acid. They are also incapable of absorbing hydrogen in their molecular structure thus the name.

Saturated fatty acids are generally found in animal fats like butter, milk and dairy products. Because of the higher melting point of those fatty acids, they are generally found in solid state at reem temperature.

6 0
3 years ago
Give the correct chemical equation for Photosynthesis/Respiration? Remember that It goes forward and backwards
Lana71 [14]

CO2 + H2O = O2 m + C6H12O6     photosynthesis

C6H12Og + O2 = CO2 + H2O + ATP      respiration

7 0
3 years ago
Thermoreceptors in the hypothalamus sense the temperature of the blood. When blood temperature begins to decrease, the hypothala
Airida [17]

Answer:

The correct answer is option Complex neuroendocrine response.

Explanation:

Hypothalamus is the thermostat of the body as it regulates and maintains body temperature by responding to external signals or stimuli and adjusts the body temperature in a close one to two degree of 98.6 degree.

The regulation involves a different type of endocrine hormones and thyroid gland and receptors that help in signaling the increase or decrease of body temperature it involves neurons and hormones.

Due to the response of thermoreceptors and hormones is known as the neuroendocrine response. Hypothalamus Involves two or more hormones and several steps it known as a complex response.

Thus, the correct answer is a Complex neuroendocrine response.

8 0
3 years ago
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