Which cell organelles can be seen changing position in the moving cytoplasm of amoeba?
What are pollutants that are put directly into the air as a result of human activity?
In regions where malaria is prevalent, the s allele is beneficial because:it causes red blood cells to distort, which makes them less hospitable to plasmodium, the parasite that causes malaria.it prevents mosquitoes from releasing plasmodium, the mosquito that causes malaria, into the blood.it improves the ability of the hemoglobin to carry oxygen.it improves the ability of the immune system to fight plasmodium, the parasite that causes malaria.
The correct answer is C. It causes red blood cells to distort, which makes them less hospitable to Plasmodium, the parasite that causes malaria as the sickle cell allele causes red blood cells to distort, making them less hospitable to the malaria-causing parasite, Plasmodium.
The correct option is C: It causes red blood cells to distort, which makes them less hospitable to Plasmodium, the parasite that causes malaria.
Sickle cell anemia is caused by the presence of the sickle cell allele (HbS).When an individual is heterozygous (carrying one sickle cell allele and one normal allele), some of their red blood cells become distorted into a sickle shape.These sickle-shaped cells are less favorable environments for the malaria parasite, Plasmodium, to thrive and reproduce.As a result, people with the HbSA genotype (heterozygotes) are less likely to suffer from severe malaria symptoms.This phenomenon is known as heterozygote advantage, where carriers of one sickle cell allele gain a survival benefit in malaria-prevalent regions.Therefore, having the sickle cell allele can provide resistance to malaria, despite the health risks associated with sickle cell disease.
Which term refers to the tiny pieces that make up a mosaic?
Answer:
Tessera:refers to the tiny pieces that make up a mosaic
Explanation:
Mosaic is an image or art which is made from the collection of the small pieces of stone, colored glass or other types of material, Most of the Mosaics are made from small pieces of glass or stone of different types of colors called as tessera. It is used for the interior decoration work.
Tessera is the term refers to the individual tiny pieces that are used to make a mosaic, it is also called as abaculus.
The tiny pieces are made of cube shaped small tile, tesserae are mostly made of glass, clay, stone, ceramic and mirror.
In 200 BCE tesserae was used in the Greek Hellenistic Mosaics.
Thus Tessera :refers to the tiny pieces that make up a mosaic
User satisfaction is a key barrier in transition to a thin client environment
a. True
b. False
Answer:
answer is true.
Explanation:
Bc it ez
If granite and marble were exposed in an area with a hot and humid climate, _____. the granite would weather more rapidly the marble would weather more rapidly the rocks would weather at the same rate
The correct answer is the marble would weather more rapidly.
The weathering of the rock can be defined as the procedure of the erosion of the rock by various agents. The marble is a metamorphic form of the limestone. The limestone is easily affected by the hot and the humid climates. The rain and the atmospheric carbon dioxide get mix together form mild acids, this acid react with the limestone and causes the chemical changes. As a result, the marble is subjected to erosion in hot and humid climate.
the marble would weather more rapidly.
How can foodborne illnesses caused by parasites best be​ prevented?
a. keep food handlers with colds out of the operation.
b. sanitize all food contact surfaces after prepping tcs food.
c. purchase products from approved suppliers.
d. exclude staff who have jaundice from the operation?
In a neuromuscular junction, synaptic vesicles in the motor neuron contain which neurotransmitter
The synaptic vesicles in a neuromuscular junction of a motor neuron usually contain the neurotransmitter acetylcholine, which helps in sending signals from the neuron to the muscles and triggering muscle contraction.
Explanation:In a neuromuscular junction, the synaptic vesicles found in the motor neuron typically contain the neurotransmitter known as acetylcholine. These vesicles are located at the ends of neurons, which are tiny structures involved in sending signals from the neuron to the muscles. When an action potential or electrical signal reaches the end of a nerve, the vesicles essentially fuse with the nerve cell's membrane. This action discharges the acetylcholine into the synaptic cleft, which is a tiny space between the nerve cell and the muscle fiber. The acetylcholine binds to receptors on the muscle fiber, triggering muscle contraction.
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Before Starch can enter a cell it must be
Starch must be digested to form simple sugars before entering a cell. Therefore, the correct option is (3) digested to form simple sugars.
Before starch can enter a cell, it must undergo digestion to form simple sugars. Here's a breakdown of the process:
1. **Hydrolysis:** Starch is a complex polysaccharide composed of glucose molecules bonded together. Enzymes such as amylase break down starch molecules into simpler forms.
2. **Formation of Simple Sugars:** Through hydrolysis, starch is broken down into its constituent monosaccharides, primarily glucose molecules. This breakdown occurs in the digestive system, particularly in the mouth (with salivary amylase) and the small intestine (with pancreatic amylase).
3. **Absorption:** Once starch is broken down into simple sugars like glucose, these molecules can be absorbed by the cells lining the small intestine. This absorption occurs through the intestinal epithelium and into the bloodstream.
So, the correct option is (3) digested to form simple sugars.
The complete question is here:
Before starch can enter a cell, it must be
(1) absorbed by simple sugars
(2) diffused into simple sugars
(3) digested to form simple sugars
(4) actively transported by simple sugars
One of the ways that acid rain is harmful is _____.
it causes chemical burns on the skin of animals.
it increases the temperature of small bodies of water.
it leaches nutrients out of plants.
it creates holes in the leaves of plants.
The correct answer is:
C) it leaches nutrients out of plants.
Acid rain droplets or acid fog comes in contact with tree leaves or tree needles. It can then leach out important tree nutrients from the leaves or needles. Specifically, acid rain removes calcium, potassium, and magnesium from the tree. These are nutrients that the tree needs for growth and reproduction. This happens because these important nutrients are bases, and opposites attract—so the base plant nutrients are drawn out of the trees by their attraction for the acid droplets that fall on them.
Answer:
It leaches nutrients out of plants
Explanation:
Which structures are found in every living cell? A) a plasma membrane and cytoplasm B) chloroplasts and mitochondrial C) a cell wall and nucleus
The structures that are found in almost every living cell are the plasma membrane and cytoplasm. Thus, the correct option for this question is A.
What are the characteristics of living cells?The characteristics of living cells are as follows:
Cellular organization.The ability to grow and reproduce.The competency for energy utilization in order to accomplish metabolic activities. The capability to perform homeostasis.Response to their external environment. The ability of adaptation.Prokaryotic organisms are the type of living organisms that do not have a well-defined nucleus and other membrane-bound cell organelles like mitochondria, Golgi complex, endoplasmic reticulum, etc. While animal cells are the type of eukaryotic cells that do not have chloroplasts. So, options B and C are eliminated.
Therefore, a plasma membrane and cytoplasm are the structures that are found in almost every living cell. Thus, the correct option for this question is A.
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What is the source of acid rain
How do blood cells interact with muscle cells?
Final answer:
Blood cells interact with muscle cells through clotting mechanisms and the delivery of oxygen and nutrients.
Explanation:
Blood cells interact with muscle cells through various mechanisms. One important interaction occurs during blood clotting. When the cells lining a blood vessel are damaged, they release a protein receptor called tissue factor. This causes platelets to adhere to the wall of the damaged blood vessel, stimulates adjacent smooth muscle cells to contract, and initiates a series of steps that lead to clot formation.
Another interaction occurs during oxygen and nutrient delivery to muscle cells. Red blood cells, which contain hemoglobin, transport oxygen and nutrients to muscle cells. Oxygen binds to hemoglobin and is released to muscle cells, providing them with the necessary energy for contraction.
In summary, blood cells interact with muscle cells through clotting mechanisms and the delivery of oxygen and nutrients.
Which of these can become fossilized? A. a footprint B. a fern C. a tooth D. all of these
How many earths could fit in the universe?
A lesion in _____ area of the brain would most likely result in a disruption of language comprehension and expression
Answer:
A lesion in the Broca's area of the brain would most likely result in a disruption of language comprehension and expression.
Explanation:
There are two parts of the brain that are linked to speech.
Wernicke's area also called Wernicke's speech area andBroca's area.Wernicke's Area is wired for the comprehension of written and spoken language while Broca's area adapted for in the production of language.
Broca's area, which is located in the frontal lobe of the brain, is connected to the production of speech.
A recent study showed that it also plays a significant role in the comprehension of language. Working memory and the Broca's area both function simultaneously to allow a person to express themselves verbally.
Cheers
A doctor who specializes in diagnosing and treating diseases and disorders of the eyes and vision.
Why would a patient with a pheochromocytoma sweat excessively, have facial pallor, and bc constipated?
During the sympathetic reaction the blood flow is augmented to the skeletal muscles and brain. Then the blood flow will diminished to the bowel which may led to constipation. The person will perspire excessively and may lead to dehydration which eventually may constrain bowel function.
Sleep may decrease activity of neurons associated with ________, suggesting an important cognitive benefit of sleep
A physical change that occurs when a stressor causes the body to go into an alarm or warning mode is ____.
A physical change that occurs when a stressor causes the body to go into an alarm or warning mode is the fight-or-flight response.
What is fight-or-flight response?The fight-or-flight response is a physiological response that is activated in response to perceived danger or stress. It is characterized by the release of hormones such as adrenaline and cortisol, which help to prepare the body for action.
During the fight-or-flight response, the body's heart rate and blood pressure increase, and blood is redirected away from non-essential functions such as digestion and towards the muscles and brain. This helps to increase the body's alertness, energy, and ability to react to the perceived threat.
The fight-or-flight response is a normal and necessary physiological response that helps the body to cope with stress and protect itself from harm. However, if the body is subjected to chronic stress or the fight-or-flight response is activated too frequently, it can have negative effects on the body's health.
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If an animal cell were placed into a solution of water taken from the ocean, what would happen to the cell
Which symptom is not associated with vitamin b deficiency?
A symptom that is not associated with vitamin B deficiency is weight gain. Contrarily, vitamin B deficiency can cause symptoms like fatigue, weak muscles, poor concentration, and in some cases, loss of appetite and weight loss.
Explanation:Vitamin B deficiency is typically associated with several symptoms such as fatigue, weak muscles, poor concentration, and anemia. However, an example of a symptom that is not associated with vitamin B deficiency is weight gain. Although vitamin deficiency can affect our health in various ways, such as leading to fatigue or poor concentration, there's no direct link between vitamin B deficiency and weight gain. Contrary to this, some people may experience loss of appetite and weight loss due to vitamin B deficiency.
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Vitamin B deficiency is linked to several symptoms, such as irritability, depression, and anemia. However, brittle or soft bones, hair loss, and insensitivity to insulin, which are symptoms associated with deficiencies in other vitamins, are not typically seen in Vitamin B deficiency.
Explanation:Vitamin B deficiencies are associated with a variety of symptoms, including irritability, depression, peripheral neuropathy, anemia, gastrointestinal disorders, and many others. However, symptoms such as soft or brittle bones, which typically indicate a Vitamin D deficiency, are not associated with Vitamin B deficiency. Other non-related symptoms may include hair loss and insensitivity to insulin, which are more commonly linked to Biotin deficiency.
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A nurse is delivering 3 l/min oxygen to a patient via nasal cannula. what percentage of delivered oxygen is the patient receiving?
The 3 layers of the skin are: A) Episode, Dental, hypothyroid B) Epidermis, demented, hypophobic C) Epidermis, dermis, hypodermis
The skin has three layers:
The epidermis, the outermost layer of skin, provides a waterproof barrier and creates our skin tone.How does a polysaccharide differ from a disaccharide?
Disaccharides are pairs of monosaccharides, while polysaccharides are large polymers composed of hundreds of monosaccharide units. Glycosidic bonds link the monomeric units in both cases, but their structure and function significantly vary. Sucrose, lactose, and maltose are examples of disaccharides, while starch, glycogen, cellulose, and chitin are examples of polysaccharides.
Explanation:The main difference between a polysaccharide and a disaccharide lies in the number of monosaccharide units they are composed of and their nature. A disaccharide is a pair of monosaccharides. Disaccharides, for example, sucrose, lactose, and maltose, are formed via dehydration synthesis and are linked together by glycosidic bonds.
On the other hand, polysaccharides, also known as glycans, are large polymers composed of hundreds of monosaccharide units. Polysaccharides like starch, glycogen, cellulose, and chitin are expressed through multiple monosaccharides, linked by glycosidic bonds. They may form branched or unbranched chains and hold different types of monosaccharides.
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The first carpometacarpal joints are examples of which type of synovial joints? the first carpometacarpal joints are examples of which type of synovial joints? saddle joint gliding joint pivot joint ellipsoid joint
What do you think the prefixes mono-and di mean
In chemistry, 'mono-' means one or singular, and 'di-' means two, referring to the number of atoms of an element in a molecule (like monoxide with one oxygen atom, and dioxide with two).
The prefixes mono- and di- are commonly used in chemistry, and they refer to the number of atoms or elements present in a molecule. Specifically, mono- means one or singular, and it is often used when there is only one atom of a particular element within a molecule. For example, monoxide means there is one atom of oxygen in the molecule. On the other hand, di- means two, indicating that a molecule contains two atoms of a certain element. An example of this is dioxide, where there are two atoms of oxygen.
Choice of diet profoundly affects human health. only two common lifestyle habits are more influential than diet: _____ and _____.
Cytotoxic t (tc) cells only respond to __________.
genes determine a person's eye color by coding for ____that affect eye color