Answer:
A. so that less energy is lost in cold environments.
Explanation:
When it’s cold outside, your body makes sure to keep the blood flowing to your core and vital organs to keep them warm. This can change the amount of blood flow to your hands and feet, making them feel cold. This is normal. The blood vessels in your hands and feet constrict (spasm) when it’s cold, to prevent heat loss from your core
Pseudomonas putida is used for fermentation of the lactose present in cheese whey. The bacteria are cultivated in a steady-state chemostat with sterile feed and at a dilution rate of D = 0.28 h-1. The lactose concentration in the feed and the effluent are S0 = 2.0 g/L and S = 0.10 g/L, respectively. The following information is available: YX/S = 0.45 g X/g S, YX/O2 = 0.25 g X/g O2, and C* = 8 mg/l (saturation DO). a. Determine the steady-state biomass concentration (X) and the specific rate of oxygen consumption (go2) b. What should be the oxygen transfer coefficient (Kia) to overcome oxygen transfer limitations if the desired DO concentration in the fermentation medium is 2 mg/l?
Answer:
Explanation:
Given that:
The dilution rate D = 0.28 h⁻¹
The concentration of lactose in the feed [tex]S_o = 2.0 \ g/L[/tex]
The effluent S = 0.10 g/L
Also;
[tex]Y_{X/S} = 0.45 g\ X/g \ S , \\ \\ Y_{X/O2 }= 0.25 g \ X/g \ O2, \\ \\[/tex]
Saturation C* = 8 mg/l
To calculate the steady-state biomass, we use the formula:
[tex]X = Y_{X/S}(S_o-S_e) \\ \\ X = 0.45(2.0 -0.10) \ g/L \\ \\ X= 0.45 (1.9) \ g/L \\ \\ X = 0.855\ g/L \\ \\ X = 855 \ mg/L[/tex]
The biomass is 0.855 g/L
For a steady-state condition, the oxygen uptake rate can be illustrated by using the formula:
[tex]q_{o_2}X =\dfrac{\mu_X}{Y_{X/O_2}}[/tex]
where;
[tex]\mu =[/tex] dilution rate (D)
Thus, the steady-state can be expressed as:
[tex]q_{o_2}X =\dfrac{D}{Y_{X/O_2}}[/tex]
[tex]q_{o_2}X =\dfrac{0.28}{0.25}[/tex]
[tex]q_{o_2}X =1.12 \ h^{-1}[/tex]
The specific rate of oxygen consumption [tex]q_{o_2}X =1.12 \ h^{-1}[/tex]
b)
In the fermentation medium, if the desired DO concentration [tex]C_L[/tex] = 2 mg/L
Here, the oxygen transfer is regarded as the rate-limiting step.
As such, the oxygen transfer rate(OTR) is equivalent to the oxygen uptake rate.
In this scenario, let's determine the oxygen transfer coefficient [tex](K_{La})[/tex] by using the formula:
[tex]OTR = K_{La}(C^* - C_L)[/tex]
where;
[tex]K_{La}[/tex]= coefficient of oxygen transfer
C* = saturation
Since [tex]OTR = q_{O_2}X[/tex]
[tex]q_{o2}X = K_{La}(C^*-C_L) \\\\ (1.12 )(855) = K_{La}(8-2) \\ \\ 957.6 = K_La (6) \\ \\ K_{La}= \dfrac{957.6}{6} \\ \\ K_{La} = 159.6 \ h^{-1}[/tex]
Thus, the oxygen transfer coefficient [tex]K_{La}[/tex] = 159.6 h⁻¹
your friend says that humans have evolved from apes.
Why does sexual reproduction increase the genetic variation in a species
Answer:
Sexual reproduction provides genetic diversity because the sperm and egg that are produced contain different combinations of genes than the parent organisms. ... So in order to form a new organism, two gametes -- the sex cells, sperm and egg -- must fuse, further mixing the genes to produce more genetic diversity.
What is the albedo effect?
Do you think the earth is warming up?
Answer: Astronomers define the reflectivity of an object in space using a term called albedo. This is the amount of electromagnetic radiation that reflects away, compared to the amount that gets absorbed.
Explanation: But to answer the "Earth warming up" question, I'd have to say that for over millions of years, Earth's climate has warmed up and cooled down many times. However, today the planet is warming much faster than it has over human history. Global air temperatures near Earth's surface have gone up about 2 degrees Fahrenheit in the last century. However, other evidence suggests that the period of 2,000 to 3,000 million years ago was generally colder and more glaciated than the last 500 million years.
So, yes I do believe that the Earth is warming up but not to explode.
Could I have Brainliest, please?
Have a fantastic day!
what is a reasonable measurement for the distance across the milky way galaxy ?
Answer:
Between 100,000 and 150,000 light-years
Explanation:
According to BBC, "the Milky Way Galaxy is probably between 100,000 and 150,000 light-years across"
The table below shows the use of some energy production methods over time.
Type of energy Average energy used annually in the past (in million tons) Average energy used annually at present (in million tons) Average energy most likely to be used annually in the future (in million tons)
Oil 200 4000 300
Gas 100 2500 700
Coal 1000 2500 1500
Wind 0.1 50 2000
Hydropower 0.7 60 150
Tidal power 0.02 50 500
Based on the table, which of these statements best describes the impact of different methods of energy production on the environment in present times?
Wind energy may be altering all shorelines on Earth.
Hydropower may be altering all shorelines on Earth.
Tidal power may not be contributing significantly to climate change.
Coal energy may not be contributing significantly to climate change.(Not this)
Answer:
I think its hydropower
Explanation:
The answer to this question
Answer:
- Spores occur underneath the leaves - PTERIDOPHYTES
- cones contain the seeds - GYMNOSPERMS
- absorbs nutrients through diffusion and osmosis - BRYOPHYTES
- ovary encases the seeds - ANGIOSPERMS
Explanation:
Plants are a very diverse group of living organisms. Each plant group has its own unique characteristics that distinguishes it from other groups. Bryophytes and pteridophytes are considered as lower plants because of their primitive features while gymnosperms and angiosperms are considered as higher plants because of their advanced features. The prominent characteristics of each plant group according to this question is as follows:
- PTERIDOPHYTES produce spores underneath their leaves.
- BRYOPHYTES absorbs nutrients through diffusion and osmosis since they lack true roots, stems and vascular tissues.
- GYMNOSPERMS bear their naked seeds on structures called cones or strobili.
- ANGIOSPERMS encases their seeds in ovaries of their flowers, which later develops into fruits.
Match the hominin with the best description.
Late Pleistocene hominins found only in Europe, Western Asia, and Central Asia; the Shanidar site belongs to this group.
Middle Pleistocene hominin; found in Africa, Asia, Europe; shows a mixture of features from previous and later hominins.
Answer:
- Late Pleistocene hominins found only in Europe, Western Asia, and Central Asia; the Shanidar site belongs to this group: Neandertals
- Middle Pleistocene hominin; found in Africa, Asia, Europe; shows a mixture of features from previous and later hominins: Homo_heidelbergensis
Explanation:
Neandertals represent an extinct hominid lineage and the closest evolutionary relatives of humans. Neandertals lived in Europe, Central Asia, the Middle East and western Siberia. This group of extinct hominids appeared around 130,000 years ago until their extinction, approx. 40,000 years ago. On the other hand, Homo_heidelbergensis is an extinct group of Homo_Hominids who lived during the Middle Pleistocene, a time period spanning 780,000-120,000 years ago. Homo_heidelbergensis is considered the most recent common ancestor between H. sapiens (modern humans) and Neanderthals. This species (Homo_heidelbergensis) combined primitive features (e.g., a wide face, and thick arching brow ridges) with modern features (e.g., a large brain capacity).
Mike is studying the phylogenetic tree for big cats.
A big cat phylogenetic tree is shown. A bracket goes to clouded leopard and to another bracket. That bracket goes to 2 additional brackets. One bracket goes to tiger and snow leopard. The other bracket goes to janguar and another bracket. The other bracket has lion and leopard.
He made several statements about the tree. Which statement is not true?
The leopard is more closely related to the jaguar than to the snow leopard.
The leopard is more closely related to the tiger than to the clouded leopard.
The leopard is more closely related to the snow leopard than to the clouded leopard.
The leopard is more closely related to the tiger than to the snow leopard.
Answer:
D
Explanation:
edg 2022
Two nucleotide sequences found in two different species are almost
exactly the same. What does this suggest about these two species?
Answer:
May have similar evolutionary histories.
hope it helps
Explanation:
Synovial joints have the greatest range of flexibility and motion.
Please select the best answer from the choices provided.
T
F
Answer: The answer is true
Answer:
true
Explanation:
true
Lucas places 20 kg samples of each substance by the same heat source all samples are at the same initial temperature which sumvstance will have the greatest temperature after some period of time
Answer:
Metallic structure with black colour body.
Explanation:
The substance has metallic structure and black colour body will have greatest temperature among other substances because metallic structure and black colour of body heat up very quickly. Metals have free electrons which make it the best conductor of electricity and heat while on the other hand, black colour is a good absorbent which absorb heat very quickly so that's why we can say that metallic solids are the substance that have the greatest temperature.
Answer:
copper
Explanation:
it copper because it have less specific heat (j/kgoc)
What is the responsibility of the Large Intestines?
Answer:
Since, we know that the large intestines have so many responsibilities .... The purpose of the intestines is basically to absorb water and including salts from a material, Which means it has not yet been digested as food, and also to get rid of any waste products left over, Also this is very important for the intestines to do this process.
Which process causes Earth's surface to warm?
Answer:the radiation of the Sun’s electromagnetic waves
Explanation:
what system produces most of the hormones in the human body
The hormones created and released by the glands in your body's endocrine system control nearly all the processes in your body
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Answer:
The endocrine system.
Explanation:
It's a group of glands that produce and secrete hormones that the body uses for a variety of purposes.
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Stable salt densities in the oceans keep the earth's climate in balance. What factor causes salinity in the ocean to increase?
Answer: evaporation, ice melting, precipitation, and ice formation.
Explanation:
Salinity refers to the amount of salt water that can be found in a body of water.
It should be noted that the salinity of a water body can be affected by evaporation, ice melting, precipitation, and ice formation.
The salinity of seawater can be increased through evaporation due to the fact that when the water evaporates, this will lead to the salts being left behind, and this will then increase the salinity.
hermoglobin is a protein that binds to oxygen. it is only produced by red blood cells and it allows blood to transport oxygen throughout the body. what statement does this information best demonstrate?
Answer:
it is lungs as the answer because you are to lazy
if 15% of the nucleotide in a DNA molecule contains guanine, what percentage of the nucleotides contain each of the other bases? Explain your answer. What scientist discovered this "rule"?
An antibiotic kills 99.9% of a bacterial population. You would expect the next generation of bacteria Group of answer choices to be just as susceptible to that antibiotic as was the previous generation. to be more resistant to that antibiotic. to be more contagious than the prior generation. to die out due to the drastic decrease in population size.
to be more resistant to that antibiotic
if an antibiotic eliminates 99.9% of the germs. It makes sense to assume that the new strain of bacteria will be more resistant to that drug than the old strain. Here the correct option is A.
The majority of the susceptible bacteria in the population are killed by the addition of a bactericidal antibiotic, while the resistant bacteria continue to exist. Only the resistant bacteria will continue to grow and multiply while being exposed to the antibiotic.
Antibiotic misuse, overuse, and ineffective infection prevention and control all contribute to the acceleration of antibiotic resistance. At all societal levels, actions can be made to lessen the effects and contain the spread of resistance.
Thus the correct opion is A.
To know more about antibiotics, visit;
https://brainly.com/question/31595863
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cell produces a chemical that diffuses short distances to reach nearby cells. This type of cell-cell interaction is an example of _______.
Diffusion
I think I’m not sure
What almost happened to the island foxs and why?
they almost went extinct, about 90% of the fox population was recently lost due to canine distemper virus
An example of transamination is finding a brand new sports car in your driveway with your name on it. removing a phosphate group from a molecule. removing an amino group and putting it into the bloodstream for the kidneys to discard. removing an amino group from one molecule and binding it to a different molecule.
Answer:
removing an amino group from one molecule and binding it to a different molecule.
Explanation:
Biological macromolecules can be defined as a very large molecule (structure) that comprises of covalently bonded organic atoms and smaller molecular structures (monomers).
Biological macromolecules are categorized into four main categories and these includes;
I. Lipids.
II. Carbohydrates.
III. Nucleic acid.
IV. Proteins.
Generally, proteins comprises of amino acids and it is responsible for maintaining the proper functioning of the body system.
Transamination can be defined as a biochemical process which typically involves the removal of amino groups from amino acids and transferring them to a ketoacid (amino acid without an amine group), so as to form new amino acids.
Basically, transamination is a reversible oxidation-reduction reaction that is responsible for the deamination of amino acids.
Hence, an example of transamination is removing an amino group from one molecule and binding it to a different molecule.
Why do all microorganisms produce pyruvate via glycolysis?
a-Evolution
b-All microorganisms do not produce glucose via glycolysis,
there are alternate pathways that produce glucose.
c-Alternate pathways exist where glucose is directly converted to acetyl-CoA
d-All microorganisms do not produce pyruvate via glycolysis, there are alternate pathways that produce pyruvate.
e-Pyruvate is necessary for all dephosphorylation reactions in cells.
Answer:
B) All microorganisms do not produce glucose via glycolysis,
there are alternate pathways that produce glucose.
Which organism in the food chain is impacted the most by Biomagnification
Where are the neutrons located in the atom? O In the nucleus O Around the nucleus
Answer:
in the nucleus
Explanation:
they are found in it
Which of the following is an example of confirmation bias?
A. A researcher is studying the college readiness of American teens. He interviews 200 urban male teenagers from Philadelphia and finds that 85% say they are ready for college. The researcher concludes that 85% of all teenagers in America are ready for college.
B. An oil company has research done on the effects of drilling on the environment. It is found that in 87% of cases, there is a negative effect. The oil company only publishes the 13% that show a positive effect, or no negative effects.
C. A journalist who does not think climate change is real is writing an article about climate change. In his article he cites one article that discusses how humans cannot be causing climate change, and ignores several other articles that discuss how humans can cause climate change.
D. A pharmacologist is studying the effect of certain drugs on humans, and tells the test subjects that the drug may cause headaches. Some of the subjects are given the drug, and some are given placebos (sugar pills) instead. Then the number of headaches is counted.
Answer:
C
Explanation:
the journalist already has an opinion on the matter, and only uses sources that confirm his opinion and ignores anything that says he is wrong. His bias affects his findings.
Fill in the blank below with the vocabulary word that best completes the sentenc
is the science of naming and classifying organisms based on structura
genetic evidence
For the following data calculate the MEDIAN.
5, 6, 6, 4, 3, 2, 2, 2, 1,3
Answer:
Mean: 3.4
Median: 3
Mode: 2
Range: 5
Minimum: 1
Maximum: 6
Explanation:
PUT THE NUMBERS IN ORDER TO FIND THE MEDIAN
1, 2, 2, 2, 3, 3, 4, 5, 6, 6
The median is the central number of a data set. Arrange data points from smallest to largest and locate the central number. This is the median. If there are 2 numbers in the middle, the median is the average of those 2 numbers.
EASY 50 POINTS!!!!!!!! PLEAAASEEE ANSWER AS SOO AS POSSIABLE
Answer:
1 is a
2 is c
3 is d
4 is e
5 is b
Answer:
A is Population. B Gene. C Species D Heterozygous. E Allele
Where are blood type proteins located?
Answer:
Red blood cell antigens can be sugars or proteins
Blood group antigens are either sugars or proteins, and they are attached to various components in the red blood cell membrane.