Answer:
Flagellum
Explanation:
A flagellum is a small, whiplike or threadlike structure that helps bacteria, protozoa and other cells to move and swim.
In humans, red blood cells have a number of proteins embedded in the cell membrane. One type of protein, the Rh factor, is controlled by a single gene and is either present or missing from the red blood cells. If present, the individual has the Rh+ phenotype. If missing, the individual has the Rh− phenotype. Rh+ is the dominant to Rh−. Suppose that, in the Yoruban population, the frequency of the Rh− phenotype is 0.01.0.01. Using the Hardy–Weinberg equations, calculate the frequency of the Rh+ allele to at least two decimal places.
Answer:
the answer would be that the frequency of the allele Rh + = 0.6
Explanation:
the frequency of the Rh value is incorrect, the value must be expressed in an integer that can have decimals but not a meaningless numerical sequence(0.01.0.01?), however, an exercise is performed taking the frequency value 0.16 as an example for the development of subsequent
we can start from the formula taking into account that the population is in Hardy-Weinberg equilibrium
p2 + 2pq + q2 = 1.0
the above is based on the fact that
p2 is considered as the dominant homozygous ratio
q2 as the proportion of recessive homozygotes
2pq as the proportion of heterozygous individuals
knowing that the Rh phenotype is recessive and has a value of 0.16, we replace obtaining
q2 = 0.16 or q = 0.4
where solving the equation
p + q = 1
p = 1- 0.4 = 0.6
the answer would be that the frequency of the allele Rh + = 0.6
Which statement best describes a meteorologist?
A
A person who gives information about the weather
B
A person who studies weather and climate conditions on Ea
C
A person who studies Earth
D
A person who studies meteors in space
Answer:
I believe the answer is B
Explanation:
A meteorologist is a person who studies weather and climate conditions on Earth.
A meteorologist can be defined as an individual with specialized education who uses scientific principles to explain, understand, observe or forecast the earth's atmospheric phenomena and/or how the atmosphere affects the earth and life on the planet.
Activities of a meteorologist include air pollution meteorology, global climate modeling, hydrometeorology, and numerical analysis and forecasting
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A number of inputs and practices are essential to the highly productive form of industrial agriculture practiced today. However, uncontrolled or excessive use of these can have severe, if unintended, "downstream" effects if they are allowed to enter watersheds. For each input/practice, match the MOST LIKELY risk. NOTE: Some practices are associated with more than one risk, but only ONE combination will result in a best match for all. Chemical Fertilizers Stockyard Runoff Soil disturbance Pesticides A.Erosion, flooding; clogged shipping channels and harbors B. Reproductive failure, poisoning, and/or death (pollinators, pets, livestock, predators, children) C. Algal blooms followed by eutrophication D. Increased biological oxygen demand/decreased dissolved oxygen
Answer:
Chemical Fertilizers
C. Algal blooms followed by eutrophication is the correct one
Stockyard Runoff
Correct D. Increased biological oxygen demand/decreased dissolved oxygen
Soil disturbance
Correct A. Erosion, flooding; clogged shipping channels and harbors
Pesticides
Correct B. Reproductive failure, poisoning, and/or death (pollinators, pets, livestock, predators, children)
Explanation:
For industrial agriculture to be effective and productive today, we have to take into account many factors so our practices function in a good way. When it comes to chemical fertilizers, it is NOT a risk the Increased biological oxygen demand/decreased dissolved oxygen , the correct risk is algal blooms followed by eutrophication. Regarding Stockyard Runoff it is wrong to think the algal blooms followed by eutrophication as risk, the actual risk is the increased biological oxygen demand/decreased dissolved oxygen. The risk in soil disturbance is the erosion, flooding; clogged shipping channels and harbors and thinking about pesticides , they are in risk for reproductive failure, poisoning, and/or death (pollinators, pets, livestock, predators, children) .
What are genetically modified foods?
Answer:
genectically modifed foods are also known as gentically engineered foods , or bioengineered foods are foods produced from organisms that have had changes introduced into their DNA using the methods of genetic engineering. Genetic engineering techniques allow for the introduction of new traits as well as greater control over traits when compared to previous methods, such as selective breeding and mutation breeding.[1]
Answer:
genetically modified foods are foods produced from plants or animals whose DNA has been altered through genetic engineering.
Explanation:
9. Glycolytic skeletal muscle fibers...
A. demonstrate higher resistance to fatigue than oxidative fibers.
B. have a smaller diameter than oxidative fibers
C. have a higher density of mitochondria than oxidative fibers
D. have a lower concentration of myoglobin than oxidative fibers
Answer:
The correct answer is D.
Explanation:
Glycolytic skeletal muscle fibers are also called fast glycolytic muscle fibers. The produce Adenosine triphosphate (ATP) very quickly.
ATP refer to the molecule that carries energy inside our cells. It is also known as a high-energy molecule that warehouses energy and supplies the cell with it when it is required.
Because Glycolytic muscle fibers contain larges units of glycogen, they are able to respond very quickly by producing tension fast.
Unlike other skeletal muscle fibres such as the slow and fast oxidative fibres, Glycolytic muscle fibers contain myoglobin and seem to be white in colour. This is because they do not require the anaerobic mechanism to generate the required energy.
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Some plasmids can replicate in several distinct species of bacteria. Frequently these plasmids have transposons carrying several different antibiotic resistance genes. In a hospital that has an outbreak of several species of bacteria each carrying resistance to three drugs (streptomycin, gentamicin, and penicillin), what is the best way to determine whether or not this resistance is due to a single shared plasmid with all three resistance genes?
Answer: The best way to know is to differentiate between types of plasmids whether or not this resistance is due to a single shared plasmid with all three resistance genes.
Explanation:
By way of definition, a plasmid is a small, circular piece of DNA that is different than the chromosomal DNA, which is all the genetic material found in an organism’s chromosomes. It can replicate on their own by using chromosomal DNA. Plasmids are mainly found in bacteria, but can also be found in archaea, multicellular organisms. Plasmids usually carry at least one gene, and many of the genes that plasmids carry are beneficial to their host organisms. Plasmids have separate genes from their hosts, they are not considered to be independent life.
Therefore in a hospital where there has been an outbreak of several species of bacteria, each carrying resistance to three drugs (streptomycin, gentamicin, and penicillin), one of the type of plasmids that shows this resistance is called resistance plasmids or R plasmids.
Resistance or R plasmids contain genes that help a bacterial cell defend against environmental factors such as poisons or antibiotics. Some resistance plasmids can transfer themselves through conjugation. When this happens, a strain of bacteria can become resistant to antibiotics. For example, gonorrhea or tuberculosis infection has become so resistant to a class of antibiotics called quinolones that a new class of antibiotics, called cephalosporins, has started to be in use. The bacteria may even become resistant to these antibiotics within five years. It is important to know that overuse of antibiotics to treat other infections, like urinary tract infections, may lead to the proliferation of drug-resistant strains.
Answer:
Take samples from infected people and grow that bacteria on different selective media. Three different culture plates having one of the antibiotic each can be used to grow these bacteria on, it should be able to grow (allow adequate incubation times). Then prepare a culture plate with all three (streptomycin, gentamicin, and penicillin) antibiotics on it at the same time. If the bacterial colonies are able to grow on this plate as well, one can conclude that the genes for resistance lies on the same plasmid.
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How do human diseases caused by bacteria and diseases caused by viruses react to antibiotics?
A. Neither responds to antibiotics.
B. Both respond to antibiotics.
C. Viral diseases respond to antibiotics; bacterial diseases do not.
D. Bacterial diseases respond to antibiotics; viral diseases do not.
Answer:
D
Explanation:
viruses don't react to antibiotics because the target of antibiotics is bacteria and their constituents however viruses react antiviral because their to them.
Human diseases caused by bacteria and diseases caused by viruses react to antibiotics as D. Bacterial diseases respond to antibiotics; viral diseases do not.
Explanation:Antibiotics are substances that kill or inhibit the growth of bacteria. They work by targeting specific structures or processes in bacterial cells, such as cell walls or protein synthesis. Viruses are different from bacteria. They are much smaller and they rely on host cells to reproduce. As a result, antibiotics do not have any effect on viruses.
Antibiotics are effective against bacterial infections, not viral infections. Bacteria are distinct organisms with cell walls, making them vulnerable to antibiotics that target specific cellular processes. Viruses, on the other hand, are not considered living cells and lack these targets. They require antiviral medications, which are different from antibiotics, for treatment.
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