Though the microbes described in the introductory chapter do not corrode the metal in the subway, many microbes influence corrosion and deterioration of metal and stone. Other microbes have other effects on their environment. During wastewater treatment, bacteria are used to reduce the amount of organic and inorganic materials so that the water no longer supports substantial microbial growth. During secondary wastewater treatment, bacteria within sludge digesters break down organic materials into fatty acids, H2, and CO2. These products are fermented to acetate, CO2, and H2. Finally, archaeans ferment acetate to form methane and carbon dioxide. Just by knowing this information, what is true of the bacteria used in sludge digesters?

a. They are capable of anaerobic metabolism.
b. They are sulfate-reducing bacteria.
c. Some are methanogens.
d. They are capable of forming slime layers.

Answers

Answer 1

Answer:

a. They are capable of anaerobic metabolism.

c. Some are methanogens.

Explanation:

The bacteria used in order to treat wastewater can be classified as anaerobic, aerobic, and facultative. Anaerobic bacteria are able to treat wastewater in low or null oxygen conditions by the process of methanogenesis. Methanogenesis is a metabolic process that involves the formation of methane (CH4) by anaerobic Archaea known as methanogens. The process of methanogenesis occurs in anaerobic environments, such as during waste sludge treatment, where these microorganisms are able to breakdown organic pollutants. Methanogens produce methane during catabolic pathways that involve the breakdown of complex molecules into simpler molecules.


Related Questions

3. Which of the samples shown below are eukaryotic?

• A. B and D
• B. B and C
• C. A, C, and D
• D. A, B, and D

Answers

Answer:

b and c

Explanation:

Living things need to maintain their internal environment . This is known as homeostasis What role does homeostasis play in controlling the rate of chemical reactions in our bodies ?

Answers

Answer:

Homeostasis is the tendency to resist change in order to maintain a stable, relatively constant internal environment. Homeostasis typically involves negative feedback loops that counteract changes of various properties from their target values, known as set points.

If a woman is heterozygous for widow's peak
(widow's peak is dominant over a smooth hairline) has children with a man with a smooth hairline, what
are the possible phenotypes of their children?
It is impossible to determine the possible phenotypes.
O All of their children will have a widow's peak.
O None of their children will have a widow's peak.
It is possible for their children to either have widow's peak or a smooth hairline.

Answers

Answer:

It is possible for their children to either have widow's peak or a smooth hairline.

Explanation:

Let's say that the widow's peak allele is W (dominant) and the smooth hairline is w (recessive).

A woman heterozygous for widow's peak is Ww. A man with a smooth hairline must have two copies of the smooth allele since it is a recessive trait, so he must be ww.

The cross is Ww x ww

                    W               w

    w            Ww            ww

    w           Ww           ww

There is a 50% chance that the children will have the genotype Ww, and therefore have a widow's peak. There is a 50% chance the children will be ww, and will therefore have a smooth hairline.

So, It is possible for their children to either have widow's peak or a smooth hairline.

Compare and contrast serine proteases and aspartic proteases. Not all answers will be used. Serine protease Both Aspartic protease

Answers

Answer: The main similarity between the serine protease and aspartic protease is that these enzymes catalyze the break down or hydrolysis of the peptide bonds.

Explanation:

Serine protease structure has a triad of histidine, serine, and aspartic acid that are joined with the hydrogen bonds. Aspartic protease has a structure which includes the two aspartic acid residues which attack the peptide bond.

Serine protease catalyzes the hydrolysis of the peptide bonds with the the help of two tetrahedral intermediates, whereas the aspartic protease abstracts the proton from water molecule it results in nucleophilic attack on the carbonyl atom of carbon resulting in breakage of peptide bond.

Which of the following biological processes releases oxygen into the atmosphere?

Answers

Answer:

photosynthesis

Explanation:

wcogo (gocow backwards)

water+carbon dioxide->glucose+oxygen

Photosynthesis releases oxygen

I need some help on this worksheet ASAP please

Answers

Answer:

sorry I don't know the answers

The Z-scheme is the way in which electrons, excited with the energy of absorbed light, are passed from one molecule to another in the light reactions. It involves many components and builds up a proton gradient.
If you extracted some cells with an organic solvent, what would the solvent contain the MOST of?

A. chlorophyll

B. ATP

C. glucose

D. hydrogen ions

Answers

The answer should be A

What type of hormone is testosterone?
a steroid hormone
a protein hormone
a neurotransmitter​

Answers

Testosterone is a
a) a steroid hormone

What will happen following contraction of the diaphragm

Answers

Answer:

Can you provide more details please?

Explanation:

HHRRTSEE rearrange this​

Answers

Answer:

THRESHER

Explanation:

What similarities and differences do DNA and RNA share in terms of function and structure? Explain!

Answers

Answer: Both DNA and RNA have four nitrogenous bases each—three of which they share (Cytosine, Adenine, and Guanine) and one that differs between the two (RNA has Uracil while DNA has Thymine).

Explanation:

The swallowing phase where the velopharynx closes forcefully and larynx completely closes at 3 levels is the...
a. Tongue preparatory phase
b. Pharyngeal transport phase
c. Oral transport phase
d. Laryngeal transport phase

Answers

Answer:

b. Pharyngeal transport phase

Explanation:

During the pharyngeal phase, the vocal folds close to keep food and liquids from entering the airway.

Swallowing the velopharynx closes forcefully and the larynx completely close at the level of the pharyngeal transport phase this action seal the airway passage, hence option b is correct.

What is swallowing ?

According to where the bolus is located, the swallowing process is often split into oral, pharyngeal, and esophageal phases. When consuming solid food vs drinking liquid, the food moves differently through the oral cavity and into the oropharynx.

The tongue closes the oropharynx while it is in the pharyngeal phase. The proximal pharyngeal wall and soft palate serve as a barrier to the nasopharynx.

The laryngeal entrance is sealed off by the vocal cords and arytenoids, and the epiglottis swings down to cover the laryngeal vestibule. These acts close up the pharyngeal cavity's airway.

Therefore at 3 levels, the velopharynx closes forcefully and the larynx completely closes in the pharyngeal transport phase action to seal the airway passage, hence option b is correct.

Learn more about swallowing, here:

https://brainly.com/question/9374866

#SPJ2

By imagining where she was when she last walked in the door, Marla retraced her steps to find her keys. This is an
example of a
dependent memory.
A. mood
B. echoic
c. state of being
D. context

Answers

By imagining where she was when she last walked in the door, Marla retraced her steps to find her keys. This is an example of a __________ dependent memory.
A.
mood
B.
echoic
C.
state of being
D.
context

Answer: D



Hope this helps!

Marla imagining where she was and retracing her steps to find her keys is an

example of a context dependent memory.

Context-dependent memory can defined as when an individual recalls

specific events or information when the context present are the same for

that  of the encoding and retrieval of the event.

In this scenario, Maria imagining where she was when she last walked in the

door is the same as where her key is to be found.

Read more on https://brainly.com/question/19037542

1.what are three factors that affect the rate of chemical reactions?

2.select one of these factors and describe how it affects chemical reactions within our bodies.

Answers

Explanation:

The factors that affects the rate of chemical reactions are;

Nature of reactants Concentration of reactants or pressureTemperature Presence of catalystSunlight

In our body, the nature of reactants is very important. A food substance in solid form undergoes slow digestive process because it has little surface area exposure for the action of digestive chemicals. Most solid food are usually chewed in the mouth before digesting them to increase their surface area.

The increasing order of food digestion is;

   lumps to granules to powder and to liquids.

What "codes" for proteins that your body uses
to make eye pigment, hair color, hair texture and
etc.?
Proteins
Genes
Phosphate-sugar group
Carbohydrates

Answers

Genes are what code for those things

Genes are segments of deoxyribonucleic acid (DNA) that contain the code for a specific protein that functions in one or more types of cells in the body.

What are the 4 types of genes?

DNA is made up of millions of small chemicals called bases. The chemicals come in four types A, C, T and G. A gene is a section of DNA made up of a sequence of As, Cs, Ts and Gs.

Thus, option "B" is correct.

To learn more about the genes click here:

https://brainly.com/question/8832859

Please Help I'll give branliest!!!

Answers

Answer:

dtyhhcdgghjgderjlheryiouyiiifdvbcxse

What is the alien invasion in the Florida Everglades?​

Answers

The foreign Burmese Python has disrupted the entire animal population in the Everglades. These invaders from Asia have proved to be extremely detrimental to Florida’s ecological systems, based on factors including their size, rapid reproduction, predatory diets, and Florida’s weather and climate conditions. Due to these multiple elements, Burmese Pythons have taken over the Everglades and have shown no signs of stopping. The problem becomes even more difficult to handle when the environmental controls taken to remove these pythons fail to counter the increasing python population in the Everglades. In other words, because of the biology of these snakes, the problems they bring to the South Florida food chain and the lack of removal of the invasive predators, Burmese Pythons create major issues for the ecosystem and are likely to spread if not controlled quickly. Hope that is enough! :)
Burmese Python Invasion of Everglades National Park, Florida
Over the past two decades, an alien predator has invaded Florida's Everglades National Park, causing damage to the entire South Florida ecosystem. The foreign Burmese Python has disrupted the entire animal population in the Everglades.

much of the united states prairie today?

Answers

Yes, much of the United States is prairie today.

( 10 points ) ( pls help brainliest also )
The pilomotor reflex is part of what larger process?

A. The hypothalamus
B. The fight-or-flight response
C. Positive feedback
D. Fluid homeostasis

Answers

B. The fight-or-flight response
The answer is b
Hope this helps

what is biology definition?

Answers

Answer:

the study of all living things

Explanation:

In a direct variation, y=39 when x=3. Find the value of y when x=2.
1.) 58.5
2.) 26
3.) 02
4.) 3

Answers

26. hope this helped.

PLEASE HELPPP!!!!
Choose the best explanation of a partial solar eclipse?
A. The earth only partially covers the sun during the eclipse
B. The moons phase is full and blocks out most but not all of the sun
C. During a new moon phase there is usually a partial but not total eclipse
D. The moon only partially covers the sun during the eclipse

Answers

Answer:

The best explanation for a partial solar eclipse is that moon only partially covers the sun during the eclipse (option D).

Explanation:

A solar eclipse occurs when the moon stands between the sun and the earth, which happens when the moon is near the plane of the ecliptic, that is, the point where the orbits of the earth and the sun intersect.

A partial solar eclipse occurs when the moon partially covers the sun, which depends on the observer's point of view on the earth and his geographical location.

The other options are not correct because:

    A. If the earth stands between the sun and the moon, lunar eclipses occur.

    B and C. During a solar eclipse it is not possible to see lunar phases, which occur when the sun's rays are reflected off the satellite.

Answer:

for a little easier answer from the other one on this question basically the answer is D.

Explanation:

Which of the following scenarios describes an example of epistasis?

Answers

What o uawant me to do exactly

Answer:

In rabbits and many other mammals, one genotype (ee) prevents any fur color from developing.

Hope this helps!!! :D

When you sweat a lot the amount of water in your blood can drop. Your cells have to maintain a certain level of water and salt in order to function properly. Which systems work together to help maintain homeostasis when you are dehydrated?

Group of answer choices

The nervous system sends a message to the musculoskeletal system to increase the amount of sweat produced.

The nervous system sends a signal to the digestive system to reduce the absorption of water from the digested food.

The respiratory system breathes faster sending a message to the nervous system to reduce heat.

The circulatory system’s lack of water causes the nervous system to signal the excretory system to reduce the amount of water it takes from the body to produce urine.

Answers

Answer:

The circulatory system’s lack of water causes the nervous system to signal the excretory system to reduce the amount of water it takes from the body to produce urine.

Explanation:

endocrine, nervous, and muscular systems work together and maintain temperature homeostasis.

What amazing thing can plants do with carbon dioxide and water molecules? How?

Answers

Plant Inhalation and Exhalation
Once the carbon dioxide enters the plant, the process begins with the help of sunlight and water. During this process, the plant combines carbon dioxide with water to allow the plant to extract what it needs for food. The plant uses sunlight as energy to perform this chemical reaction.

Answer:

In the process of photosynthesis the plants make their own food by using carbon dioxide, water, sunlight and soil.

The energy from sun light causes a chemical reaction that breaks down the molecules of carbon dioxide and water and reorganizes them to make the sugar (glucose) and oxygen.

Explanation:

Hope this helps you

Crown me as brainliest:)

In pea plants, plant height is controlled by a single autosomal dominant gene. Tall plants (H) are dominant to short plants (h). A tall plant with the genotype capital H lowercase h crossed to a tall plant with the genotype capital H lowercase h. In a cross of two tall heterozygous plants, which phenotype ratio is expected from the resulting offspring?

Answers

Answer:

3:1 (Tall=75%)(Short=25%)

Suppose there was NO meiotic recombination but maternal and paternal chromsomes still assorted randomly during meiosis. How many different kids would be possible from two parents?

Answers

Answer:

8,324,608 chromosome combinations

Explanation:

During meiosis, chromosomes separate independently so that only one chromosome came from the father and the other homologous chromosome came from the mother. This process of independent assortment produces a huge amount of possible combinations in the diploid zygote cell. In humans, the haploid number of chromosomes is n = 23, thereby there are 2²³ = 8,324,608 chromosome combinations. Thus, the independent assortment of chromosomes during meiosis is a key factor that contributes to genetic variation in the offspring.

On a very cold morning, Boojho and Paheli were talking with each other as they walked down to their school. They observed that the air comming out of their mouth looked loke smoke. They were amused and wondered how it happened. Help them find the answer​

Answers

Answer:

condensation

Explanation:

Condensation. Sorry if I’m wrong :)

help me pls!!!! I have to get a good grade!!!

Answers

I think it is the first one

A plant has 3 parts, parallel veins, no main tap root, and the endosperm is separate.
Is this plant a monocot or a dicot?

Answers

monocot :) is the answer, good luck!!
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