Most viruses are much smaller than bacteria and cannot be seen without an electron microscope, making them too small to be visible with a light microscope or to the bare eye.
Viruses vary widely in size, with most virions, or single virus particles, being very small, about 20 to 250 nanometers (nm) in diameter. Due to their small size, viruses are too small to be seen without the aid of an electron microscope. Even with the discovery of larger viruses, such as those up to 1000 nm in diameter, the majority cannot be seen with a light microscope. A typical virus, like the influenza virus, is approximately 100 nm, making it much smaller than a typical bacterium, which is around 1 µm (1000 nm), and at least ten times smaller than a typical plant or animal cell, which ranges from 10 to 100 µm (10000 to 100000 nm).
An object must generally measure about 100 µm to be visible without a microscope, which is far larger than a typical virus. Therefore, the answer to the student's question on how big viruses are is B: Too small to be seen without the aid of an electron microscope.
Why do birch trees have black streaks on their trunk?
The birch tree has a thin papery eye like structure that act as pores. It helps in providing the pathway for gaseous exchange.
Further Explanation:
The species of birch trees are usually small or medium in size. They are generally found on the northern side of Asia, NorthAmerica and Europe that has a temperate climate.A number of different types of birch grow in clumps of two or more closely spaced separate trunks.
The tree has light-colored bark that can be of white, gray or yellowish color. It is separated into thin papery plates and a horizontal line that is dark in color. They are referred to as lenticils that has a lens-shaped structure. They appear as pores that help in direct gaseous exchange between the plants and the outer environment. The barks are impermeable to gases but in this plant, they help in the exchange of gases through this pore.
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Answer Details:
Grade: High School
Subject: Biology
Chapter: Plant cell
Keywords:
Birch, tree, papery, pores, gaseous, northern, colored, horizontal, lenticils, environment, impermeable, plants.
When during fetal development do rhythmic breathing movements begin?
Answer:
late in the third trimester the other person is wrong
Explanation:
Which of the following is true about imprinting?
A. It occurs during a specific time in young animals.
B. It is restricted to birds.
C. It is often used in the training of adult animals.
D. It always involves the sense of sight.
Body defenses that respond to generalized tissue damage and many common pathogens are referred to as
The student's question relates to the nonspecific innate immune response, which is the body's first line of defense, acting rapidly against a variety of pathogens through barrier mechanisms like skin and mucous membranes, and other innate defense cells.
The student is asking about a type of immune response known as the nonspecific innate immune response. This response acts as a first line of defense against potential pathogens and is characterized by a generalized reaction to a variety of pathogens, rather than a targeted attack on a specific one. The nonspecific innate defenses include barrier mechanisms such as the skin and mucous membranes, which provide immediate protection.
These defenses are constantly active, preventing a broad range of pathogens from entering the body. Additionally, the innate immune system includes a variety of specialized cells and soluble factors that engage in a rapid response to invaders. Importantly, these defenses are called innate because they are built-in components of our physiology and do not have the ability to 'remember' or improve response upon repeated exposures to the same pathogen, as opposed to the adaptive immune system, which has this capability.
Because of physiologic changes during pregnancy, maternal red blood cell volume and iron storage in the fetus results in an increased need for
Which of the following resources has the advantage of being a very predictable energy source and renewable
A: nuclear power
B: Ocean Exothermic energy
C:petroleum energy
D: tidal power
Answer: D: tidal power
Explanation:
A renewable resource is the one which can be replenished after a single use. These resources are abundantly available on planet earth. The examples include the water, wind and the sunlight. The tidal power is the resource which has the advantage of being a very predictable energy source and is renewable in nature. The energy is harnessed by the oceanic tides. The tides in the oceanic water emerge due to wind currents and the gravitational force of water exerted by the earth. The energy generated by the rise and fall of the tides is used to generate electricity through water turbine.
Eq-31 at a minimum, what should a non-powered canoe or kayak display in reduced visibility?all around red lightall around white lightall around green lightall around amber light
The minimum requirement for a non-powered canoe or kayak in reduced visibility conditions is to display an all-around white light. This standard improves visibility ensuring the safety of the vessel amidst other watercraft, thus preventing accidents.
Explanation:In conditions of reduced visibility, the minimum requirement for a non-powered canoe or kayak is to display an all-around white light. This light ensures that the vessel is visible to other boats in all directions. It is critical because it helps prevent collisions on the water, enhancing safety. The light can be on continuously or can be used to signal the presence of the kayak or canoe when other watercraft are in sight. It's also important to note that this requirement may vary slightly based on the regulations in different regions or countries, but generally, the all-around white light is the standard.
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The field of ________ is concerned with maintaining biological diversity.
What are some of the immune functions of the lymphatic system?
Answer:
Maintaining water homeostasis in the body
After Frida stops exercising, she continues to breathe heavily. What is most likely occurring in her body?
Heavy breathing during exercise has produced an oxygen surplus in her muscles. This oxygen is being transported to her lungs. This is a result of aerobic respiration.
Heavy breathing during exercise has produced a carbon dioxide surplus in her muscles. Lactate is being transported to her liver. This is a result of aerobic respiration.
Strenuous exercise has caused her body to be in carbon dioxide debt, and she is breathing hard while lactate is transported to the liver. This is a result of anaerobic respiration.
Strenuous exercise has caused her body to be in oxygen debt, and she is breathing hard while lactate is transported to the liver. This is a result of anaerobic respiration.
The most likely scenario occurring in Frida's body is: Strenuous exercise has caused her body to be in oxygen debt, and she is breathing hard while lactate is transported to the liver. This is a result of anaerobic respiration. Option D is correct.
When engaging in strenuous exercise, especially activities like sprinting or intense weightlifting, the demand for energy (ATP) in the muscles can outstrip the body's ability to supply oxygen through aerobic respiration. In such situations, the muscles switch to anaerobic respiration, which does not require oxygen but produces lactate (lactic acid) as a byproduct. Lactate buildup can lead to muscle fatigue and discomfort.
The heavy breathing Frida is experiencing after exercise is her body's attempt to repay the oxygen debt created during anaerobic respiration and to clear lactate from the muscles. This process helps restore normal oxygen levels and remove waste products, aiding in muscle recovery.
Hence, D. is the correct option.
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--The given question is incomplete, the complete question is
"After Frida stops exercising, she continues to breathe heavily. What is most likely occurring in her body? A) Heavy breathing during exercise has produced an oxygen surplus in her muscles. This oxygen is being transported to her lungs. This is a result of aerobic respiration. B) Heavy breathing during exercise has produced a carbon dioxide surplus in her muscles. Lactate is being transported to her liver. This is a result of aerobic respiration. C) Strenuous exercise has caused her body to be in carbon dioxide debt, and she is breathing hard while lactate is transported to the liver. This is a result of anaerobic respiration. D) Strenuous exercise has caused her body to be in oxygen debt, and she is breathing hard while lactate is transported to the liver. This is a result of anaerobic respiration."--
The opening in a bone through which the blood vessels, nerves, and ligaments pass is a __________.
a. foramen
b. foramina
The opening in a bone through which the blood vessels, nerves, and ligaments pass is a foramen, which is present in Option a as the bone is the strongest part of the body and supports the body.
What is the significance of different types of bones?There are several types of bones in the body, such as long bones that are wide and primarily responsible for movement, such as the femur, tibia, and fibula, flat bones that are responsible for protecting internal organs such as the skull, ribs, Sesamoid bones are found in joints, and irregular bones are found in the pelvis.
Hence, the opening in a bone through which the blood vessels, nerves, and ligaments pass is a foramen, which is present in Option a as the bone is the strongest part of the body and supports the body.
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Describe one example of poaching that is prevalent in your area
An illness causes doug to experience severe diarrhea and an accompanying loss of bicarbonate-rich secretions. how can this metabolic acidosis be compensated?
Foods that are low in sodium and rich in potassium include
Foods that are low in sodium and rich in potassium include potatoes, bananas, beans, seeds, nuts, meat, poultry, fish, eggs, dark green leafy vegetables, soy, and organ meats.
Explanation:Foods that are low in sodium and rich in potassium include:
Potatoes: Potatoes are a good source of potassium and can be prepared in various ways.Bananas: Bananas are known for their high potassium content and they make a healthy snack.Beans: Beans, such as kidney beans and black beans, are low in sodium and rich in potassium.Seeds and nuts: Seeds like pumpkin seeds and nuts like almonds are good sources of potassium.Dark green leafy vegetables: Vegetables like spinach, kale, and Swiss chard are low in sodium and rich in potassium.Meat, poultry, and fish: Lean cuts of meat, poultry, and fish are low in sodium and provide potassium.Eggs: Eggs are a low-sodium food that is also a source of potassium.Soy: Soy products like tofu and tempeh are low in sodium and contain potassium.Organ meats: Organ meats like liver are rich in potassium and low in sodium.Learn more about foods that are low in sodium and rich in potassium here:https://brainly.com/question/4523922
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Two pairs of vocal folds are found in the larynx which pair are the true vocal cords
_____ are collections of reproductive and sterile tissue arranged on a stem tip in a tight array with very short internodes
The branch of biological science that studies the external and internal structure of the body and the physical relationship among body parts is called ________.
The branch of biological science that studies the external and internal structure of the body and the physical relationship among body parts is called anatomy.
What is anatomy?Anatomy is a branch of biology that focuses on identifying and describing the physical characteristics of living things.
In its most restricted meaning, gross anatomy solely refers to the study of major body structures by dissection and observation.
Surface anatomy (the external body), regional anatomy (certain body regions), and systemic anatomy are the three divisions of gross anatomy (specific organ systems).
Actually, the word "anatomy" comes from the Greek verb "anatomein," which meaning "to cut open, to dissect."
It explains the crucial step in this field of study the opening up and description of the body's constituent parts in detail.
Thus, the answer is anatomy.
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A segment of nucleic acid that contains the sugar ribose and the nitrogenous bases a, g, u, and c would be called _____.
low levels of activity in the anterior cingulate cortex are associated with ____.
Answer:
The given blank can be filled with borderline personality disorder or BPD.
Explanation:
The BPD refers to a mood disorder that affects the manner in which an individual associates with others. It is the most generally known personality disorder. In the condition, an individual may exhibit suicidal behavior, can cause self-injury, and is at risk for eating disorders and substance abuse.
The biological characteristics exhibiting in individual suffering with BPD are increased activation of the amygdala, lower serotonin function, disturbed connectivity between the prefrontal cortex and the amygdala, and low levels of activity in anterior cingulate cortex.
Prokaryotes that obtain energy from sunlight are called
How long before an unexpected critical event or actual cardiac arrest does a patient's baseline begin to deteriorate?
The answer to this question is a mean of 6.5 hours.
Cardiac arrest is a situation when the heart loss its function of pumping blood in the body. The main cause of cardiac arrest is due to coronary artery disease. Some of the causes of cardiac arrest are heart failure, lack of oxygen in the body, and due to a plenty of blood loss. If a person is under cardiac arrest and not treated immediately, the patient will die.
Hemocytoblast cells
a. are abundant in the plasma.
b. are specialized cells.
c. are found in yellow bone marrow.
d. give rise to formed elements in the blood.
A scientist isolated DNA from a particular bacterium and decided to analyze it. The sequence of the bacterial DNA is ATGGGCTAGTCTT
A shrew is adapted for burrowing and a monkey for tree dwelling. Their forelimbs appear quite different from each other's, but the internal structure of the forelimbs of these two animals is same. What do you conclude from this example?
The __________ system is responsible for maintaining homeostasis of the body via rapid transmission of electrical signals.
The nervous system, including its central and peripheral components, as well as the autonomic nervous system divisions, is responsible for maintaining homeostasis through the rapid transmission of electrical signals to coordinate bodily functions.
The nervous system is responsible for maintaining homeostasis of the body via rapid transmission of electrical signals. This complex human organ system includes the central nervous system (CNS), which is made up of the brain and spinal cord, and the peripheral nervous system (PNS), which consists of the nerves extending throughout the body. The nervous system is essential for coordinating all of the body's voluntary and involuntary activities, including the autonomic nervous system (ANS), which controls involuntary functions such as the regulation of smooth and cardiac muscle as well as glandular tissues.
The ANS helps maintain homeostasis by involuntary control of body functions and it is divided into the sympathetic and parasympathetic nervous systems. The sympathetic nervous system prepares the body for stress-related activities, while the parasympathetic nervous system conserves energy as it slows down the heartbeat, increases intestinal and gland activity, and relaxes sphincter muscles. These systems work in sync to regulate various autonomic functions, ensuring the body maintains a stable internal environment.
Large doses of antibiotics given to fight an infection are likely to destroy bacteria that produce vitamin k.
In which digestive organ do we find such beneficial bacteria
The various taxonomic levels (for example, phyla, genera, classes) of the hierarchical classification system differ from each other on the basis of _____.
Which component of the client’s nephron acts as a receptor site for the antidiuretic hormone and regulates water balance?
Final answer:
The ADH receptor site in the nephron is the collecting duct, which allows water reabsorption into the bloodstream when ADH is released. Disruption of ADH leads to decreased water reabsorption and increased urine production. Osmoreceptors in the hypothalamus regulate the release of ADH in response to the blood's solute concentration.
Explanation:
The component of the client's nephron that acts as a receptor site for the antidiuretic hormone (ADH), also known as vasopressin, is the collecting duct. ADH is vital in regulating water balance by making the collecting ducts permeable to water, allowing for increased water reabsorption.
When ADH is released from the posterior pituitary gland, it signals the kidneys to conserve water. The kidneys achieve this by reabsorbing water from the urine back into the bloodstream through the walls of the collecting ducts. If the ADH system is impaired, there would be less water reabsorption, leading to increased urine output and potentially causing dehydration.
Osmoreceptors in the hypothalamus monitor the concentration of blood plasma. When these receptors detect an increase in the solute concentration (like sodium), they signal the hypothalamus to stimulate the pituitary gland to release ADH, which then acts on the kidneys' collecting ducts to reabsorb water and lower blood osmolality.
Genetic engineering can be used to create more productive strains of farm animals. By adding genes to an animal’s DNA, the animal can be made to produce milk or meat containing vital nutrients that would not be found naturally in those products. This provides a greater amount of nutrients per serving of milk or meat. Do you think that this type of genetic engineering should be pursued? Explain your answer. What are some possible impacts (positive and negative) of this type of genetic engineering on individuals, society, and the environment?
Genetic engineering is the direct treatment of an organism’s genome using biotechnology. It is a set of technologies used to alter the genetic makeup of cells, together with the transport of genes within and across species boundaries to produce improved organisms. An example would be to protect plant from insect damage, it can be made into a transgenic plant. Transgenic plant are called genetically modified organisms (GMO) because there is a gene added or removed in the original plant to obtain a set of characteristic such as insect damage.
What should happen when iki solution contacts something that does not contain starch?