If two organisms are in the same phylum, which other classification category must they also share?
The notable hardness of bone is attributed to ________. the notable hardness of bone is attributed to ________. the presence of glycoproteins the presence of cartilage the presence of collagen fibers the presence of proteoglycans the presence of inorganic hydroxyapatites
The notable hardness of bone is attributed to the presence of inorganic hydroxyapatites. Due to the calcium salts deposited in it, resulting to the hardness. The abnormal hardness of bone, which allows it to resist the compression.
The notable hardness of bone is primarily attributed to the presence of inorganic hydroxyapatite crystals. The correct option is E.
Hydroxyapatite is a mineral compound consisting of calcium and phosphate ions.
It forms a major component of the bone matrix, providing strength and rigidity to the bone structure.
The bone matrix is composed of collagen fibers, which provide flexibility and tensile strength, and inorganic hydroxyapatite crystals, which contribute to the hardness and mineralization of bone.
The hydroxyapatite crystals deposit around and within the collagen matrix, forming a composite material that combines strength and toughness.
These hydroxyapatite crystals give bone its characteristic hardness and enable it to withstand compressive forces and resist fracture.
Thus, the correct option is E.
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Complete question:
Choose the correct option:
The notable hardness of bone is attributed to ________.
A. the presence of glycoproteins
B. the presence of cartilage
C. the presence of collagen fibers
D. the presence of proteoglycans
E. the presence of inorganic hydroxyapatites
Which structure is also called the windpipe?
Microbiology is the study of organisms not visible to the naked eye. Which is an indespensible tool in this field?
Pasteur pipet
Microtome
Beaker
Microscope
Non-nutrient compounds that are biologically active and found in foods such as tomatoes, chocolate, red wine, blueberries and spinach are termed:
Answer:
Phytochemicals is the right term for non-nutrient compounds
Explanation:
A 2-year-old child who is hospitalized for repair of tetralogy of fallot is seen squatting in the playroom. in response to this behavior, what should the nurse do
Shot in the head, the victim died instantly because the bullet entered the _______, the portion of the brain that regulates breathing.
Final answer:
The victim died instantly after being shot in the head because the bullet entered the medulla oblongata, a critical part of the brain stem that controls the unconscious act of breathing.
Explanation:
The bullet entered the medulla oblongata, the portion of the brain stem that regulates unconscious functions such as heart rate and breathing. The brain stem, specifically the medulla and the pons, contain respiratory centers that automatically adjust the rate of breathing according to the body's needs. For instance, during physical exercise when the blood's carbon dioxide levels rise, the brain stem signals the diaphragm to increase the rate of contractions, thus quickening the breathing rate to expel the excess carbon dioxide and maintain blood pH levels within a narrow range.
The control of breathing is critical for life, and this is why injuries that affect the brain stem, especially the medulla oblongata, can lead to immediate death, as they compromise the body's ability to regulate critical functions like breathing and heart rate.
Final answer:
The victim died instantly after being shot in the head because the bullet entered the medulla oblongata, a critical part of the brain stem that controls the unconscious act of breathing.
Explanation:
The bullet entered the medulla oblongata, the portion of the brain stem that regulates unconscious functions such as heart rate and breathing. The brain stem, specifically the medulla and the pons, contain respiratory centers that automatically adjust the rate of breathing according to the body's needs. For instance, during physical exercise when the blood's carbon dioxide levels rise, the brain stem signals the diaphragm to increase the rate of contractions, thus quickening the breathing rate to expel the excess carbon dioxide and maintain blood pH levels within a narrow range.
The control of breathing is critical for life, and this is why injuries that affect the brain stem, especially the medulla oblongata, can lead to immediate death, as they compromise the body's ability to regulate critical functions like breathing and heart rate.
Chromosomes are lined up in the middle of the cell during which phase of mitosis?
During the metaphase phase of mitosis, the sister chromatids align along a linear plane called the metaphase plate in the middle of the cell. This setup facilitates the subsequent separation of chromatids.
Explanation:Chromosomes are lined up in the middle of the cell during the metaphase phase of mitosis. During this phase, the sister chromatids, connected by cohesion proteins, align along a linear plane called the metaphase plate or equatorial plane. This metaphase plate is positioned roughly midway between the two poles of the cell. The chromosomes are maximally condensed at this time, thereby preparing for separation during the next phase.
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Where can earthquakes occur?
A) at a divergent plate boundary
B) at ALL plate boundaries
C) at a convergent plate boundary
Answer:
The answer is B) at ALL plate boundaries
Explanation:
An earthquake is a phenomenon of sudden and temporary shaking of the earth's crust produced by the release of accumulated energy in the form of seismic waves. The most common are caused by the activity of geological faults, although they can also occur due to other causes such as, for example, friction on the edge of tectonic plates.
Phosphofructokinase is an allosteric enzyme that catalyzes the conversion of fructose 6-phosphate to fructose 1,6-bisphosphate, an early step of glycolysis. in the presence of oxygen, an increase in the amount of atp in a cell would be expected to _____.
In the presence of oxygen, an increase in the amount of ATP in a cell would be expected to inhibit phosphofructokinase.
Phosphofructokinase is a key regulatory enzyme in glycolysis, which is the metabolic pathway that converts glucose into pyruvate, generating ATP and NADH. The regulation of phosphofructokinase is crucial for maintaining energy balance within the cell.
ATP serves as an energy currency in the cell, and an increase in ATP levels signals that there is already an abundance of energy available. In this scenario, the cell does not need to produce more ATP through glycolysis.
Therefore, an increase in ATP concentration acts as a feedback mechanism to inhibit phosphofructokinase.
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what are some physical and chemical characteristics of a eutrophic lake?
Eutrophic lakes are characterized physically by thermal stratification and chemically by high levels of nutrients, especially nitrogen and phosphorus. This leads to excessive growth of phytoplankton or algae and potentially creates anoxic dead zones due to subsequent decay of these organisms.
Explanation:A eutrophic lake has several physical and chemical characteristics that distinguish it from other types of lakes. From a physical perspective, a eutrophic lake typically has thermal stratification, with a warmer, well-illuminated upper layer and a colder, darker lower layer.
This stratification supports a robust biological community, with phytoplankton, including algae, and cyanobacteria populating the upper layer and other organisms, such as decomposing bacteria and lake trout, in the bottom layer. Chemically, eutrophic lakes often have high levels of nutrients, particularly nitrogen and phosphorus.
These excess nutrients, usually introduced through human activities such as fertilizer runoff or sewage disposal, can lead to overgrowth of phytoplankton or algae. This excessive growth and subsequent death and decay of these organisms can deplete the oxygen in the lake, creating dead zones where other organisms cannot survive.
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The skin receives approximately ____ of all the blood circulating through the body.
Which chordate characteristic is visible on the outside of an adult cat?
A factor that promotes maximum production of atp in cellular metabolism is the presence of
What is another name for a tropical savanna?
How many fish species are prescent on the reef.
What is the most obvious indicator that aging begins in young adulthood?
The process of _____________ occurs when the sending neuron normally reabsorbs excess neurotransmitter molecules.
Pads of cartilage that separate the vertebrae and act as shock absorbers are known as
The pads of cartilage that function as shock absorbers between the vertebrae are known as intervertebral discs. They consist of a tough outer layer and a gel-like inner part and provide flexibility to the spine while preventing damage during physical activities.
Explanation:The pads of cartilage that separate the vertebrae and act as shock absorbers are known as intervertebral discs. These discs are found in the spinal column and serve a critical function in maintaining spinal flexibility while also helping prevent damage to the vertebrae during physical activities, such as running or jumping, which can put a lot of stress on the spine. Intervertebral discs consist of a tough outer layer called the annulus fibrosus and a soft, gel-like inner part known as the nucleus pulposus, this unique structure allows them to act effectively as natural shock absorbers in your backbone.
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Which best describes the law of conservation of mass?
The digestive organ that functions to store food, kill bacteria, and partially digest proteins is:
Which kind of transport do white blood cells use when they engulf and destroy bacteria?
What is the role of beta phenylethyl alcohol in pea and how does it work?
An infant who has undergone surgery for hypertrophic pyloric stenosis (hps) is being bottle fed by the mother. what should the nurse teach the mother about feedings to decrease the chance of the infant vomiting
How were researchers belyaev and trot able to produce domesticated foxes?
If the cell body of a pns neuron survives when an axon is damaged, axon filaments can extend peripherally from the injured site toward the original target.
Which of the following pairs a land cover with its most appropriate use? A. Urban land → Human shelter B. Rangeland → Lumber C. Forestland → Food production D. Developed land → Livestock grazing
Answer: A.Urban land → Human shelter
Land can be defined as the part of the surface of the earth that is solid and not occupied by water. Land can be used by human or wildlife. It provides a substrate for the survival of the living beings. The land is extensively occupied by the human population for the purpose of habitation, agriculture, industrialization and for other needs. The animals also use land as rangeland (for grazing), and habitation.
The most appropriate use of land is Urban land → Human shelter because urban land is occupied with modern human population which use it as shelter.
Generally the dominant group of planktonic primary producers in cold water:
The dominant planktonic primary producers in cold water are phytoplankton. They contribute to about half of the Earth's photosynthesis and are thus a crucial part of marine ecosystems. Their survival and productivity are impacted by nutrient availability and environmental conditions like thermal stratification and severe winters.
Explanation:The dominant group of planktonic primary producers in cold water is typically phytoplankton. These microorganisms contribute to half of Earth's photosynthetic activity, indicative of their integral role in marine ecosystems. As exemplified by Antarctic Sea figures, phytoplankton thrive in cold waters, and even among ice crystals, maintaining their size from few micrometers to 2 millimeters.
Further, phytoplankton encompass diverse organisms such as dinoflagellates, which form a central component of plankton. The growth of phytoplankton is predominantly influenced nutrient availability; in the Pacific Ocean this is iron, while in the Atlantic it is nitrogen. Their productivity supports a plethora of oceanic life, from smaller creatures like zooplankton, protists, and small fish, to larger ones like whales and dolphins.
Conversely, limitations exist in the form of thermal stratification in the ocean, that impacts the movement of organic nutrients necessary for the sustenance of phytoplankton. To add to that, during harsh winter conditions, aquatic life, including phytoplankton, demand higher resources for survival.
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O brain & sensory development before birth: which sensation is the most developed, and which sensation is the least developed at brith?
Suppose there are 500 units of energy available at the producer level of the energy pyramid. Approximately how many units of energy are available to the first-level consumer? A. 5 B. 50 C. 1 D. 100