Through mitosis, the number of chromosomes is kept constant from one cell generation to the next.
What occurs during mitosis?A cell divides into two identical daughter cells after duplicating all of its components, including its chromosomes. Due to the importance of this procedure, specific genes carefully regulate each phase of mitosis. Health issues like cancer may develop when mitosis is improperly controlled.
How many phases of mitosis are there?Prophase, pro metaphase, metaphase, anaphase, and telophase are these stages.
What function does mitosis serve?Mitosis' purpose is to divide the genome so that the two daughter cells inherit an identical and equal number of chromosomes.
Where in the cell cycle does mitosis occur?The mitotic phase, which consists of mitosis and cytokinesis and produces two daughter cells, begins after interphase. Despite the fact that the two processes frequently overlap, mitosis occurs before cytokinesis.
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In the dna isolation process, ________ is used to break down the protein complexes and allow the dna molecules to easily precipitate.
In the DNA isolation process, ice cold 95% ethanol is used to break down the protein complexes and allow the DNA molecules to easily precipitate.
What is separation and isolation of DNA fragments?
The cutting of DNA by restriction endonucleases results in the fragments of DNA. These fragments can be separated by a technique known as gel electrophoresis.Since, DNA fragments are negatively charged molecules they can be separated by forcing them to move towards the anode under an electric field through a medium/matrix.The most commonly used matrix is agarose which is a natural polymer extracted from sea weeds.The DNA fragments separate (resolve) according to their size through sieving effect provided by the agarose gel. Hence, the smaller the fragment size, the farther it moves.The separated DNA fragments can be visualised only after staining the DNA with a compound known as ethidium bromide followed by exposure to UV radiation (you cannot see pure DNA fragments in the visible light and without staining). We can see bright orange coloured bands of DNA in a ethidium bromide stained gel exposed to UV light.The separated bands of DNA are cut out from the agarose gel and extracted from the gel piece. This step is known as elution.The DNA fragments purified in this way are used in constructing recombinant DNA by joining them with cloning vectors.To learn more about DNA isolation process: brainly.com/question/18316109
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explain the
consequences of allowing a scientist to withhold
information from other scientists and the public.
After ovulation, the secondary oocyte is drawn from the peritoneal cavity into the uterine tube by _________
After ovulation, the secondary oocyte is drawn from the peritoneal cavity into the uterine tube by fimbriae.
Ovulation is the process by which a developed egg is released from the female ovary so that male sperm cells can fertilize it. In humans, only one egg is typically released at a time; on rare occasions, two or more may do so during the menstrual cycle. On the 14th to 16th day of the roughly 28-day menstrual cycle, the egg emerges from the ovary. The little, finger-like projections at the end of the fallopian tubes known as the fimbriae of the uterine tube, or fimbriae tube are where eggs go from the ovaries to the uterus. The ovary and fimbriae are joined.The immature ovum that forms soon after ovulation is called a secondary oocyte.Near the fibrotic end of the fallopian tube, secondary oocytes are discharged into the abdominal cavity.learn more about ovulation here:
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The vertebrate group called ______ includes horses, wolves, cats, humans, cows, mice, deer, pigs, and bats.
Answer:
mammals
Explanation:
Answer: Mammals
Explanation: Mammals have hair or fur, are warm-blooded, most are born alive, the young are fed milk produced by the mother's mammary glands, and they have a more complex brain than other animals.
Under conditions when there is very intense competition between memebers of the same species the distribution of individuals will tend to be:____.
As the intense competition of the species are observed in clumped distribution, so the answer is distribution of individuals will tend to be clumped.
What is intraspecies competition?The competition which occurs between individuals of the same species based on common need for a limited resources, leading to a reduction in the survival and reproduction rate.
Intraspecific competition for exploitation which is an indirect type observed when an individual consumes the available resources.
Intraspecific competition by interference observed when the individuals fight to access for other's food.
Hence, answer is clumped.
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Which organ system takes in nutrients like glucose?
The digestive system takes in nutrients like glucose and processes them for absorption into the bloodstream.
The digestive system breaks down glucose into absorbable molecules. Food is chewed and combined with saliva to start glucose digestion. Gastric fluids then digest the meal in the stomach.
Liver and gallbladder enzymes and bile break down carbs, proteins, and lipids in the small intestine. Carbohydrates, including glucose, break down into monosaccharides. These tiny molecules enter the circulation through the small intestinal walls.
Glucose in the circulation may power cells and tissues. Liver and muscle glycogen stores extra glucose for later use. The digestive system absorbs nutrients and provides energy to maintain bodily function.
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When working to diagnose a superficial bacterial infection, the procedure most likely used is a(n) ________.
When working to diagnose a superficial bacterial infection, the procedure most likely used is a culture and sensitivity .
A culture is a test to find germs (such as bacteria or a fungus) that can cause an infection. A sensitivity test checks to see what kind of medicine, such as an antibiotic, will work best to treat the illness or infection. when bacteria's are Susceptible it means they can't grow if the drug is present. This means the antibiotic is effective against the bacteria. Resistant means the bacteria can grow even if the drug is present. This is a sign of an ineffective antibiotic. Intermediate means a higher dose of the antibiotic is needed to prevent growth.
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A main outcome of ivan pavlov’s research is that a neutral stimulus can become a conditioned stimulus?
A main outcome of Pavlov’s research is that a neutral stimulus can become a conditioned stimulus only in the presence of an unconditioned stimulus that triggers an unlearned response.
What is Pavlov’s conditioning?
The classic conditioning -Pavlov conditioning- is an associative learning way. It is a behavior in which stimuli and responses are associated.
In Pavlov's conditioning, an unconditioned stimulus that usually induces a given response is associated with another conditioned stimulus -neutral- that does not provoke any response by itself.
Let us review a few concepts,
Unconditioned stimuli: Biologically significant stimuli that provoke an unlearned or reflex reaction. For example, food is an unconditioned stimulus.Conditioned stimuli: neutral, innocuous, or biologically not significant stimuli. Unconditioned Responses: Unlearned response that is triggered by reflex because of an unconditioned stimulus. An example is salivating.Conditioned Responses: These are provoked by conditioned stimuli. This refers to a learned response that reflects the association between conditioned and unconditioned stimuli.Initially, an unconditioned stimulus does not provoke any response, but after enough exposure to conditioned and unconditioned stimuli together, the simple presence of unconditioned stimuli induces conditioned responses. In this aspect, the subject has learned to predict or anticipate the unconditioned stimulus.
The classic example is the one in which a dog increases its salivation secretion as an unconditioned response when it sees food -the unconditioned stimulus-.
If the unconditionated stimulus is associated with the sound of a ring bell or a light -conditioned stimulus-, after a certain time, the dog will secrete saliva when hearing the ring bell soung or seeing the light.
If the conditioned stimulus is associated with a bad experience, there is an aversion response or conditioned fear.
The main outcome of Ivan Pavlov’s research is that a neutral stimulus can become a conditioned stimulus? Yes, but only in the presence of another unconditioned stimulus (food) that triggers an unlearned response (salivation).
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Kendra is studying the energy pyramid shown. Which statement is supported by the energy pyramid?
A) The ecosystem can support fewer foxes than grasshoppers.
What is energy pyramid?An energy pyramid is also called ecological pyramid. It is a graphical representation of the energy that are found within the trophic levels of an ecosystem. The largest level of the pyramid is the producers that is present at the bottom and the shortest level is present on the top of the pyramid which is tertiary consumer that have very low in population. This make the structure like a pyramid. We know that the size of the fox is bigger than grasshopper so more energy is needed by the fox which causes fewer foxes can survive in the ecosystem.
So we can conclude that the ecosystem can support fewer foxes than grasshoppers.
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The choice of system used to transport nutrients is based primarily on whether the nutrients are:________
The choice of system used to transport nutrients is based primarily on whether the nutrients are: FAT OR WATER SOLUBLE.
Depending on how soluble they are, nutrients can be categorized. Most dissolve in water because they are water-soluble. The fat-soluble vitamins, on the other hand, behave like oil and do not dissolve in water.Because they are soluble in organic solvents and are absorbed and transported similarly to fats, vitamins A, D, E, and K are referred to as fat-soluble vitamins.The B vitamins — folate, thiamine, riboflavin, niacin, pantothenic acid, biotin, vitamin B6, and vitamin B12 — and vitamin C are the nine water-soluble vitamins. A clinical illness caused by a deficiency in one of these water-soluble vitamins has the potential to cause serious morbidity and mortality.learn more about nutrients here: https://brainly.com/question/8070307
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Pyruvate carboxylase and phosphoenolpyruvate carboxykinase catalyze reactions of gluconeogenesis that bypass the reaction of glycolysis that is catalyzed by?
Pyruvate carboxylase and phosphoenolpyruvate carboxykinase catalyze reactions of gluconeogenesis that bypass the reaction of glycolysis that is catalyzed by pyruvate kinase.
Gluconeogenesis:The tissues of some organs, including the brain, the eye, and the kidney, use glucose as their primary or only source of metabolic fuel. Glycogen stores become exhausted during a protracted fast or intense exercise, and glucose must be created from scratch to keep blood glucose levels stable. The process through which glucose is created from non-hexose precursors such glycerol, lactate, pyruvate, and glucogenic amino acids is known as gluconeogenesis.
Glycolysis is effectively reversed during glucose synthesis. However, gluconeogenesis makes use of four distinct enzymes to skip the three highly exergonic (and essentially irreversible) phases of glycolysis. The pyruvate carboxylase, PEP carboxykinase, fructose 1,6-bisphosphatase, and glucose 6-phosphatase enzymes are specific to gluconeogenesis. Gluconeogenesis can only take place in particular tissues because these enzymes are not found in all cell types. In humans, the liver and, to a lesser extent, the renal cortex are the primary locations for gluconeogenesis.
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Nonverbal communication refers to ________ body movements, gestures, and facial expressions. instant messaging and other e-communication. written language. beliefs assumed to be true by everyone.
Nonverbal communication refers to body movements, gestures, and facial expressions. Nonverbal communication, often known as manual language, is the process of conveying information without the use of spoken or written words.
Nonverbal communication is crucial because it reveals critical details about a situation, such as how someone may be feeling, how they process information, and how to approach an individual or group of individuals. These are the following types of nonverbal communication:
Face Expressions: Observers can tell someone's emotional condition from their facial expressions.
Paralinguistics: Vocal communication that is distinct from spoken language is referred to as paralinguistics.
Proxemics: A crucial form of nonverbal communication is the desire for personal space, which is something that people frequently discuss. We need a certain amount of space around us, and we also view a certain amount of space as being ours.
Body Language and Posture: Leg crossing and arm crossing are postures that portray a lot of information.
Gestures: Deliberate body language, including gestures like waving, pointing and using the fingers to represent numbers is a crucial tool for conveying ideas without using words.
Appearance: Our choices in hairstyles, clothing, and other aesthetic elements are frequently regarded as forms of nonverbal communication.
Eyes Gaze: The eyes are a key component of nonverbal communication, and major nonverbal acts include staring, blinking, and glancing.
Artifacts: Other means for nonverbal communication include objects and imagery.
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How should the nozzle tip of an air-polishing device be positioned for anterior teeth?
The hand-piece tip should be positioned at 80 degree angle to the buccal or oral surface and 90 degree angle to the occlusion surface of the posterior teeth.Tip should be held 3-4 mm from the surface.o
Air polishing involves the use of compressed air, water and glycerin power to disrupt oral biofilm and remove stain from tooth surfaces. Air polishing is essential t avoid trauma to oral soft tissues.
The surface of tooth which is called enamel is strong enough to withstand repeated tooth polishing , it avoid newly erupted teeth exposed root surface and area of decriminalized. If polishing does occur on these surface, fluid therapy can minimize the risk of dental case.
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Which of the following organs are not composed of cells A.amoeba B.paramecium C.euglene D.none of these
Answer: D is the Answer
The process by which a white blood cell or an amoeba engulfs bacteria is called pinocytosis.
a. true
b. false
Can you make electricity out of lemons?
Answer: Yes and no. You can use a lemon as a battery to generate electricity, but you cannot "make" electricity out of a lemon.
Explanation: Lemons have citric acid, and acids typically are very grateful and open to receiving electrons. So, if you have good conductors like copper and zinc, the acid will react with the zinc and loosen the electrons allowing them to move towards the copper.
TA-DA. You've just created a battery (a rather weak one) out of a lemon.
I feel like this is more of a chemistry question rather than a biology one, but nevertheless, I hope this helped.
In response to a steak dinner, certain secretions are needed to aid digestion. What cells in the pancreas would provide these secretions?.
Acinar cells
Yes, CCK would be activated in response to a heavy fat and protein meal, which would then drive a pancreatic secretion that is rich in enzymes.
What do Acinar cells do ?Nearly all of the digestive enzymes required for nutrition digestion that are active in the small intestinal lumen are synthesised and secreted by pancreatic acinar cells. To ensure a sufficient supply of digestive enzymes, both synthesis and secretion are tightly controlled over short and long time scales.
The exocrine pancreas's role. The centroacinar cells and intercalated duct cells release a biocarbonate-rich buffer solution, whereas the acinar cells create, store, and release digesting enzymes.Learn more about Acinar cells here:
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What brain structure is responsible for raising or lowering the thresholds of conscious awareness?
A research group is looking for a way to use spider silk, valued for its high tensile strength, to make extremely strong ropes, but spiders only produce small amounts of silk. they have isolated the gene and have inserted it into cows to produce the silk protein in their milk where the scientists can collect it in large quantities. what is this process called? a. bioreaction b. transgenics c. artificial selection d. recombination
Option (B) Transgenics is the correct answer.
Transgenics involves one or more DNA sequences being artificially introduced into an organism that wouldn't usually have them.
What is Transgenics?The term "transgenic" refers to organisms with modified genomes.For scientific investigation, most transgenic organisms are produced in laboratories. A particular gene of interest is disabled in transgenic mice called "knock-out" mice. Researchers can learn more about the normal operation of the gene by researching its consequences.It is possible to alter the genomes of living things with contemporary genetic technology. The term "genetic engineering" also applies to this method.Additionally, commercial uses for transgenic organisms have been created. Food crops like soy and peas that have undergone genetic modification to become resistant to pesticides and herbicides are probably the most well-known examples.Hence, Transgenics entails the artificial introduction of one or more DNA sequences into an organism that wouldn't typically contain them.
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When a person sees a doctor about a respiratory illness, the doctor will want to determine if the sickness is in the
upper respiratory tract or the lower respiratory tract. The starting point for the lower respiratory system is the
trachea.
Which structures are part of the upper respiratory system? Select three options.
the larynx
0
the bronchus
the alveoli
the lungs
the pharynx
The nose
Answer:
its below
Explanation:
The major passages and structures of the upper respiratory tract include the nose or nostrils, nasal cavity, mouth, throat (pharynx), and voice box (larynx)
Which respiratory system characteristics are shared by fish, frogs, sponges, and earthworms?
The respiratory system characteristics shared by fish, frogs, sponges, and earthworms are gas exchange across a moist respiratory surface.
Which organisms respire through their moist respiratory surface?
The moist respiratory surface of earthworms and amphibians like frogs is used for breathing. They belong to a class of land-dwelling creatures with skin that is permeable to gases. Earthworms, sponges, fish, and frogs may breathe through their permeable skin, which must be kept moist.
Earthworms reside underground in the wet soil, whereas amphibians are creatures that live in or near water. The skin of animals that can breathe through their skin is moist, and the capillaries, which are tiny blood veins, are located near the skin's surface. These little blood arteries supply oxygen to the body's numerous tissues and carbon dioxide to the epidermis.
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five negative effects of fire?
Answer:
Just all around is bad for the earthExplanation:
Destroying homes.Kill or injures/destroys wildlife habitat.Pollutes the air which harmful to human health. Lung problems, heart failure, and premature death.The increase of carbon dioxide on earth contributes to the greenhouse effect and climate change.In better ecological news for britain, what species extinct in europe for 6,000 years was reintroduced there?.
Bison
These "woolly bulldozers" have been missing from the UK's wild for thousands of years, but a particular programme has welcomed them back.
What are Bison ?Thanks to a ground-breaking plan to reintroduce these mammals to one of south-east England's greatest sections of ancient woodland, bison have recently made their long-awaited comeback to the UK.
Any of the two species of grazing animals that make up the genus Bison of the family Bovidae are known by the names bison, buffalo, or wisent.Buffalo and bison are different animals even though the phrases are frequently used interchangeably. Water buffalo and Cape buffalo are two of the Old World species that are indigenous to Asia and Africa.Learn more about Bison here:
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The structures of the limbic system are particularly important in group of answer choices emotion and learning. sensation. motor control. regulation of hunger and thirst.
The structures of the limbic system are particularly important in emotion and learning and is denoted as option A.
What is Limbic system?
This is referred to the part of the brain located in both sides of the thalamus and are involved in behavioral and emotional responses such as feeding, reproduction etc.
This system also controls the emotion and learning aspect needed for our survival thereby making it the most appropriate choice.
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What kind of antibody does a baby receive from its mother’s colostrums (first milk)?
a. igd
b. iga
c. igm
d. igb
e. igg
iga and igg antibody present in Colostrum, the first breast milk.
Primary immunoglobulin in human milk is IgA .Immunoglobulin A (IgA) is an antibody blood protein that's part of your immune system. Your body makes IgA and other type of antibodies to help fight off sickness. Antibodies like IgG antibodies in breast milk help shape infants' gut bacteria and immunity. Researchers have known for some time that maternal breast milk provides critical nutrients for newborns, and antibodies from mothers vaccinated against a specific disease-causing bacterium or virus can be transferred via breast milk to babies. These antibodies provided infants with high grade of protection from infection for approximately 3 to 6 months, giving their own immune systems time to mature.
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An example of sliding a joint is…
A Elbow joint
B Neck joint
C Knee Joint
D Wrist joint
An example of sliding joint is Wrist joint. Therefore, option (D) is correct.
Wrist joint is an example. The wrist joint allows sliding or gliding actions because the wrist bones move smoothly. Sliding improves hand dexterity, making it easier to do tasks like keyboard typing and managing tiny objects.
The radius, ulna, and hand carpals form the wrist joint, a complex articulation. The wrist joint's fluid gliding movement aids the hand's flexibility and nimbleness, making it important for many ordinary activities. Therefore, option (D) an example of sliding joint is Wrist joint.
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If the concepts of feminization and masculinization apply to humans (which we cannot determine at present)...
Choices:
Masculine and feminine behaviors are purely social constructs
The concept that masculinity must be accompanied by a reduction in femininity is incorrect
The concept that femininity is unaffected by masculinity is correct
Biological behaviors associated with masculinity would also be associated with femininity
Masculine and feminine behaviors being purely social constructs is the correct choice and is denoted as option A.
What is Masculinity?This is defined as the features and behavior which are associated with the male gender.
Women are always regarded or set up as being inferior to men in the society thereby resulting in them not having the same cultural influence as men. This depicts the both of them being social constructs and is therefore the most appropriate choice.
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The axial skeleton contains ________. 1. skull 2. scapula 3. true and false ribs 4. vertebrae 5. phalanges
The axial skeleton contains the skull, true and false ribs, and vertebrae. Option 1 and 4.
What is axial skeleton?The axial skeleton is a portion of the skeleton that consists of the bones of the head, the neck, the chest, and the back.
It is in contrast to the appendicular skeleton which consists of the bones of the upper and lower extreme of the body, including the bones of the shoulder and the pelvis.
The axial skeleton consists of 80 bones altogether, including the bones of the ears and the vertebral column.
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Which part of the nephron is responsible for the greatest possible increase in urine concentration?
Bowman's capsule collecting duct loop of Henle is the part of the nephron is responsible for the greatest possible increase in urine concentration.
Maximum concentration occurs at the bottom of the loop. The ascending limb of the nephron loop is impermeable to water, but Na + and Cl – are pumped out into the surrounding fluids by active transport.
The production of concentrated urine involves complex interactions among the medullary nephron segments [5;6] and vasculature. In outer medulla, the thick ascending limbs of the loops of Henle actively reabsorb NaCl.
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How do the unsaturated fatty acids in phospholipids affect the structure of cell membranes?
Unsaturated fatty acids are a component of the phospholipids in cell membranes and help maintain membrane fluidity. The Phospholipids contain a variety of unsaturated fatty acids, when compressed, the “kinks” in their tails push adjacent phospholipid molecules away, that helps in maintain fluidity in the membrane. Unsaturated fatty acids have at least one double bond, creating a "kink" in the chain, the absence of double bonds decreases fluidity, making the membrane very strong and stacked tightly.
The ratio of saturated and unsaturated fatty acids determines the fluidity in the membrane at a temperature, at appropriate temperatures the phospholipids have enough kinetic energy to overcome the intermolecular forces holding the membrane together, which increases membrane fluidity.
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