B and C ANSWER...
B) they are only present on the endoplasmic leaflet of the cell
C) they are only present on the cytosolic leaflet of the cell
You wish to determine the concentration of bacteria in a liquid sample. You measure the concentration by direct microscopic observation and by the plate count technique. Which method would give you a more accurate count of viable (i.e. living) bacteria in the sample
Answer:
The correct answer to the question above is "PLATE COUNT TECHNIQUE"
Explanation:
DIRECT MICROSCOPIC OBSERVATION is the method of estimating the number of microorganism using microscope. Samples to be estimated are placed on microscope slides which allow few cells in a small volume to be counted. Then, the value determined is used to estimate the total number of cells mathematically. It is only difficult to aee small cells which may affect precision.
VIABLE COUNT is the estimation of the living cells in a given sample.
PLATE COUNT TECHNIQUE is used to estimate the number of viable cells that are present in a given sample of actively growing or dividing cells based on bacteria cells found on agar plate. A sample to be counted is diluted in a solution that will not kill the microorganisms, this is done to enable accurate counting as only living bacteria will be counted.
Importance of freezing stem cells in South Africa?
Answer:
Stem cells are special cells found in the human body which has the ability to change into different cell types and functions.
They are expensive in South Africa and are freezing the stem cells helps in the preservation of the cells for research works in the medicine. They are also used in the treatment of different illnesses which requires cells and tissue transplants.
Type several paragraphs describing the full carbon cycle in detail. i. Discuss all components of your poster, as outlined in step 3. ii. Describe the exchange of carbon through carbon-containing compounds between an organism and the environment. iii. Describe the contributions of photosynthesis and cellular respiration within and among the four spheres. Discuss how carbon enters and leaves each of the four spheres and in what forms. iv. Discuss the role of carbon storage in organisms. b) Click “Enter” on your keyboard a few times to leave enough space to answer the following question. i. How is a model of the carbon cycle different from the actual cycling of carbon in an ecosystem? c) Make sure your paragraphs include correct sentence structure, punctuation, grammar, and spelling. d) Ask your teacher where you should save your work. Your teacher may also have specific guidelines about the file name you should use.
Answer:
The carbon cycle is nature's way of reusing carbon atoms, which travel from the atmosphere into organisms in the Earth and then back into the atmosphere over and over again. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms
Explanation:
What must happen before mistosis can being?
Answer:
The S phase of a cell cycle occurs during interphase, before mitosis or meiosis, and is responsible for the synthesis or replication of DNA. In this way, the genetic material of a cell is doubled before it enters mitosis or meiosis, allowing there to be enough DNA to be split into daughter cells
Answer:
The S phase of a cell cycle occurs during interphase, before mitosis or meiosis, and is responsible for the synthesis or replication of DNA. In this way, the genetic material of a cell is doubled before it enters mitosis or meiosis, allowing there to be enough DNA to be split into daughter cells.
Which process produces clones?
Answer:
asexual reproduction
Explanation:
Carbon can be found in shells and
sedimentary rock at the bottom of
oceans in the form of
Answer:
The correct answer to the following question will be "Limestone".
Explanation:
Carbon dioxide has always been typically accumulated throughout the ocean by organic compounds, whether as gasification agent or, throughout a longer period, as carbonate rocks elsewhere in the seafloor.When individuals die, everyone's shells fall straight to the bottom including its ocean's surface and thus become sediments including limestone as well as organic cement.So that the above would be the right answer.
Answer:
a
Explanation:
Natural selection merged with the work of __________ in the 20th century to open up our understanding of evolutionary theory. a. Alfred Russel Wallace b. Gregor Mendel c. Jean-Baptiste Lamarck d. Erasmus Darwin e. Charles Lyell
Answer:
The correct answer is B) Gregor Mendel.
Explanation:
Gregor Johann Mendel was an 18th-century Genetic Scientist whose works, although revolutionary, didn't come to scientific limelight until the 20th century.
He was famous for his experiment with the Pea Plant. Through his experiments, he brought to record many of the rules of heredity also called the laws Mendelian inheritance.
Mendel died in 1884 aged 61, however, his work serves as the foundation for modern-day genetic science.
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Name the largest cell
Answer:
egg
Explanation:
specifically, ostrich eggs
Answer:
the largest cell is the egg of ostrich
Explanation:
i hope this will help you :)
Create three relevant questions that you would like answered or clarified about the role of DNA and chromosomes. Focus on the following areas as you generate questions: The cause and effect relationship between the genetic code and gene expression Mechanisms of gene regulation The role of DNA segments that do not code for proteins
Answer:
Chromosome is made up of protein and DNA molecule.
Explanation:
Chromosome is a thread like structure which is formed from protein and one molecule of DNA. It is present inside the cell of both plant and animals. DNA is a heredity material which contains all characteristics of an organism. Genetic code are codes which contains information about the formation of a specific protein while gene expression is a process in which genetic code is used for the synthesis of proteins. There is no specific role of DNA segments that do not code for proteins but some scientist belief that it control the activity of the gene.
What are vectors and list the diseases that are caused by them.
Explanation:
vectors are living organisms that transmit infectious pathogens between humans,or from animals to humans.
malaria
plague
relapsing fever
Amanda gets protein at lunch by eating a chicken sandwich. How can Amanda’s body use the protein in the chicken to build protein in her cells?
Answer:
- The proteins in the chicken are broken down into amino acids, and the DNA in Amanda's cells uses those amino acids to build human proteins.
Explanation:
The body uses the protein taken by Amanda in the form of a chicken sandwich by breaking it down into the form of compounds called 'amino acids.' Amino acids are described as the substances that are responsible for the formation of proteins in the body. Thus, the DNA present in Amanda's body cells will use these amino acids to form human proteins. The longer chains of these amino acids help the body to ensure its proper structuring and functioning.
The proteins can be broken down into amino acids, and Amanda used her genetic material (DNA) to build proteins from these amino acids.
A protein is a long chain of amino acids linked by peptide bonds.During gene transcription, a specific fragment of DNA known as gene is used to create an mRNA, which is then used to create a protein by a process called translation.The linear order of nucleotides in DNA determines the order of amino acids in the protein sequence.In conclusion, the proteins can be broken down into amino acids, and Amanda used her genetic material (DNA) to build proteins from these amino acids.
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which is a gemete? A) Embryo B) Estrogen C) Cervix D) Egg
Aside from being a good marksman, what is the key to making a clean kill?
A
luck
B
patience
C
range
D
weather
Answer:
C. range
Explanation:
Being a good marksman requires a very good range of whatever target you intends to shoot.
What happens to a population when the death rate decreases?
A. The birthrate usually increases.
B. The population size usually increases.
C. The population size usually decreases.
D. The birthrate usually decreases.
Answer:
B. The population size usually increases.
Explanation:
You can predict the growth rate by using this simple equation: growth rate = birth rate – death rate.
If the birth rate is larger than the death rate, then the population grows.
The population size will decrease.
If the birth and death rates are equal, then the population size will not change.
HOPE THIS HELPS & PLEASE MARK AS BRAINIEST!Answer:
B
Explanation:
Which correctly lists three main causes of deforestation?
A.) air pollution, mining, logging
B.) mining, cattle ranching, logging
C.) cattle ranching, water pollution, air pollution
D.) water pollution, logging, mining
Answer:
B
Explanation:
Took the test 2021
what happens if stomach is removed
Answer: you die
Explanation:
Answer:
What happens after your stomach is removed?After surgery, the way you eat and digest food will change, and it’s important that you carefully follow your doctor’s recommendations for eating to ensure your body is absorbing much-needed nutrients.“It is important to try to consume as many calories as possible to minimize rapid weight loss in the first few months following surgery, and to take in nutrients that the body needs to aid in the healing process,” said Jeffrey M. Farma, MD, FACS, a surgical oncologist at Fox Chase Cancer Center.“Eventually the desire to eat and enjoy food will return,” he said.Eating after your gastrectomyWithout your stomach, you aren’t able to handle regular portions of food and may not even feel hungry. Even if you are not hungry, it is important to remember that nutrition is a vital part of your health.You will need to eat smaller amounts of food more often – six to eight small meals a day. Your doctor or nutritionist may also recommend that you stay upright for some time after eating. Your health care team can help you adjust your diet if you are having problems eating.Some patients may experience a condition called dumping syndrome. When part or all of the stomach is removed, the food that is swallowed quickly passes into the intestine, leading to problems with nausea, diarrhea, sweating and flushing after eating. There are treatments to help with these symptoms.“Since the stomach is no longer there to do the grinding and breakdown of food, it is important that patients take small bites and thoroughly chew the food,” Farma said.Maintaining your weight without a stomachConsuming enough calories to return to your favorite activities will happen over time. Nutritious, high calorie, low sugar foods provide the best bang for the bite. Calories are your body’s first priority.“You will not be able to eat the same quantity of food as you did before your surgery, so it is important to get the calories in smaller amounts of high calorie foods,” Farma suggested.Dietary guidelinesEat a variety of foods including fruits, vegetables, whole grains, protein-rich foods and dairy, which provide a good balance for every meal.Try not to go for more than 2 or 3 hours without eating.Carry healthy snacks so you can take a bite here and there.Nutrient-dense liquids can provide needed calories and are sometimes easier to consume than solid foods. Consider drinking milk, eggnog or unsweetened juice instead of coffee, tea or water.While you can’t change the fact that your digestive system is different, you can change your diet and lifestyle to enjoy a full and rewarding life after surgery.A nonnative species of squirrel is introduced into a forest. Which would most likely prevent this squirrel from becoming an invasive species?
A. There are no natural predators for the squirrel in this ecosystem.
B. The squirrel must compete with stronger organisms for resources.
C. The forest ecosystem has very low biodiversity.
D. The squirrel is able to reproduce quickly in this ecosystem.
Answer:
B
Explanation:
competing with stronger organisms makes it difficult for the squirrel to be invasive
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If a nonnative species of squirrel is introduced into a forest, one of the things that can prevent it from reaching an invasive status is if the squirrel competes with stronger organisms for resources.
Competition is one of the factors that limit the growth of organisms' populations.
All other factors being equal, a combination of some of the following will make the squirrel attain an invasive status:
The absence of natural predators means that the squirrel's population is not threatened in any way.Low biodiversity in the forest ecosystem means that the squirrel will experience very little to no competition for resourcesReproducing quickly in the ecosystem means that the population will boom in no time.More on invasive species can be found here: https://brainly.com/question/22117564
1 point
The process of translation involves the joining of codons on the mRNA
strand with anticodons, which are attached to tRNA and carry amino acids.
Codons consist of how many bases or "nucleotides"? *
The process of translation involves the joining of codons on the mRNA with anticodons of tRNA that carry amino acids. Codons consist of three consecutive nucleotides present on mRNA.
What is translation?Translation is the process of forming polypeptide chains by reading the nucleotides (codon) of mRNA. The three consecutive nucleotides make up a codon. Example is AUG.
The tRNA has an anticodon site that reads the codons of the mRNA. The tRNA carries an amino acid and synthesises polypeptide chains by reading the codons of mRNA. Example: The AUG codon codes for methionine amino acids.
The tRNA reads the mRNA from the 5' end to the 3' end. In this translation process, ribosomes and other translation proteins are involved. Due to translation, the gene in the DNA is expressed.
Hence , the codon is made up of three consecutive nucleotides present on mRNA. This is attached to the anticodon of tRNA, and a polypeptide is synthesized.
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Change the stimulus to read: Edward Jenner?'s smallpox inoculation experiment was based on his observation that
dairymaids who had had cowpox did not contract smallpox. How did Jenner form his hypothesis from this observation?
He asked what would happen if he inoculated a person with cowpox fluid and then later with smallpox fluid.
He tested different existing inoculations to see which one was most effective in preventing smallpox.
He observed dairymaids who had contracted cowpox to see whether they became immune to smallpox.
He drew a conclusion about dairymaids who got cowpox becoming immune to getting smallpox.
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Answer: It's A
Explanation:
Which types of measurement are used to describe quantities of heat and temperature ?
Answer:
There are three different systems for measuring heat energy (temperature): Fahrenheit, Celsius, and Kelvin. In scientific measures, it is most common to use either the Kelvin or Celsius scale as a unit of temperature measurement.
Explanation:
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What role to 'epigenetics' have to do in genetic expression?
Answer:Epigenetics is the study of heritable changes in gene expression (active versus inactive genes) that do not involve changes to the underlying DNA sequence — a change in phenotype without a change in genotype — which in turn affects how cells read the genes.
Explanation:Epigenetics is the study of heritable changes in gene expression (active versus inactive genes) that do not involve changes to the underlying DNA sequence — a change in phenotype without a change in genotype — which in turn affects how cells read the genes.
1. It is the state of matter that is very compressible a. liquid b. solid c. gas d. Plasma NEED HELP GUYS
Answer:
C
Explanation:
In general, Gases are the most compressible and solids are the least compressible.
Answer:
In general, Gases are the most compressible and solids are the least compressible.
Explanation:
The main reason for this is the intermolecular forces which determine the physical state of a substance by altering the intermolecular spaces. hope this helps you :)
The proximate (immediate) source of energy for oxidative phosphorylation is _____. The proximate (immediate) source of energy for oxidative phosphorylation is _____. kinetic energy that is released as hydrogen ions diffuse down their concentration gradient ATP synthase NADH and FADH2 substrate-level phosphorylation ATP
The source of energy is the electron derived from the FADH₂ and NADH combined with oxygen.
What is oxidative phosphorylation?The oxidation of substrates and the synthesis of ATP are processes that are connected during oxidative phosphorylation, which takes place in the mitochondria of all animal and plant tissues.
The two carrier molecules NAD or FAD transfer hydrogen ions (or electrons) to the electron transport pumps as the Krebs cycle is running. ATP, NAD+, and FAD+ are the products of oxidative phosphorylation.
The source of energy is the electron derived from the FADH₂ and NADH combined with oxygen. The kinetic energy that is released as hydrogen ions diffuse down their concentration gradient ATP synthase NADH and FADH2 substrate-level phosphorylation ATP
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What is a nebula? A. The core of a massive star B. A cloud of gas and dust in space C. A swirling disk with a lot of gravity D. The debris remaining after a supernova
Answer:
its B. a cloud of gas and dust in space
Nebula is a cloud of gas and dust in space. The correct option is B.
What is special regarding nebula?A nebula is a distinct luminescent component of the interstellar medium that can be composed of ionized, neutral, or molecular hydrogen, as well as cosmic dust.
When stars form within a nebula, they emit a stream of charged particles known as stellar wind.
Massive stars and young stars have stellar winds that are much stronger than the Sun's.
When the wind collides with the gas in the nebula, it creates shock waves or hydrodynamic instabilities, which shape the gas clouds.
Nebulae are frequently star-forming regions, as seen in the Eagle Nebula's "Pillars of Creation."
Thus, the correct option is B.
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Why do people sleep at night?
Answer:They sleep to get rest and when they’re tired. If they do not sleep enough they will not be active in the morning
Explanation:
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What is the most common
way that active transport
occurs in the cell?
A. Particles flow into the cell through
holes in the cell membrane.
B. Pumps embedded in the cell membrane
use energy to bring particles into the cell.
C. Particles simply follow the
concentration gradient.
D. Organelles leave the cell, gather
particles, and bring them back into the
cell.
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Answer:
Es la B.
Explanation:
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Adrian caught a virus while staying with his grandmother. A few years later, his mother and sister got the same virus. This virus could spread through touch and direct contact. However, Adrian did not contract the virus this time, even though he was living with his mother and sister. Why did he not get sick? Adrian’s adaptive immunity remembered the antigens from the virus and gave him lifelong immunity to it. Adrian’s innate
Answer:
Adrian's adaptive immune system remembered the antigens from the virus. so he becomes immune to it.
Explanation:
Answer:
Adrian’s adaptive immunity remembered the antigens from the virus and gave him lifelong immunity to it.
Adrian’s adaptive immunity produced a higher amount of specific antibodies for the antigen, preventing the virus.
Explanation:
Which is a density-independent factor?
the main respiratory surface in man is; Select one: A. alveolar wall B. internal nostrils C. bronchial wall D. tracheal wall
Answer:
answer is alveolar wall
Answer:
Option A
Explanation:
Alveolar Wall forms the main respiratory surface where exchange of gass happens.
The nurse is observing a set of new parents to ensure that they are bonding with their newborn. What displayed behavior would indicate that the parents bonding is maladaptive?
Answer:
Neglecting the child
Explanation:
Maldatives behaviors are the behaviors that do not facilitate the parent-infant bonding, meaning that they are those behaviors that are hindering the process. And the best way of removing that is to encourage the behaviors that counter them.
The process of pointing out the responsiveness of the infant is a positive strategy for facilitating parent-infant attachment. Telling the mother that she must pay attention to her infant may be perceived as derogatory and is not
appropriate. Educating the mother in infant care is important; however, pointing out the responsiveness
of her baby is a better tool for facilitating mother-infant attachment. .