why are cheek cells more irregular in shape then that of the onion or elodea cells
Final answer:
Cheek cells are irregularly shaped because they are epithelial cells that need to conform to the inner surface of the mouth, unlike the brick-shaped onion cells which have a rigid cell wall that contributes to plant structure.
Explanation:
Cheek cells are more irregular in shape than that of onion or elodea cells because they are squamous epithelial cells. Unlike the regular brick-like shape of onion cells, cheek cells are flake-shaped to provide a flexible covering that conforms to the oral cavity. The irregularity in shape allows cheek cells to cover surfaces and adjust, as they are not rigid like plant cells which have a firm cell wall. In addition, cheek cells contain a prominent nucleus that can be stained with methylene blue, which can then be easily observed and identified under a microscope. When preparing wet mount slides of cheek cells, it is important to handle the methylene blue carefully as it will stain skin and clothes and to dry off the slides and coverslips with paper towels. After staining, this enables a clear view of the cell membrane, cytoplasm, and nucleus of the cheek cell. Onion cells, with their uniform shape, create a highly organized structure, which helps in the plant's overall structural integrity.
What is the term that describes the pattern or base pairing in dna?
Final answer:
The term that describes the pattern of base pairing in DNA is 'base complementary rule' where adenine (A) pairs with thymine (T) and guanine (G) pairs with cytosine (C), forming the building blocks of the DNA double helix and ensuring accurate replication and storage of genetic information.
Explanation:
Base Pairing in DNA
The pattern of base pairing in DNA is a fundamental concept that explains how nucleotides bond to each other within the DNA molecule. It refers to the specific pairing of nitrogenous bases: adenine (A) with thymine (T), and guanine (G) with cytosine (C). This is known as the base complementary rule and is critical for DNA replication and genetic information storage. For instance, if one DNA strand has the sequence ATGCCAGT, the opposite strand, following base pairing rules, will read TACGGTCA.
These base pairs are held together by hydrogen bonds, forming the rungs of the DNA double helix. The genetic code within an organism's DNA is determined by the sequence of these base pairs. Moreover, these rules of base pairing enable us to deduce the complementary strand of DNA from one of its strands, an insight first explained by Chargaff's rules.
The specificity of base pairing is not only crucial for the structure of DNA but also plays a key role in DNA replication and transcription processes. This specific pairing creates a reliable system in which the genetic code can be accurately copied and expressed.
The suffix in the medical word hematocrit means ________.
The suffix 'crit' in hematocrit means 'to separate' or 'to judge'.
The suffix 'crit' in the medical term hematocrit is derived from Greek and means 'to separate' or 'to judge'. In the context of a hematocrit test, it refers to the process of separating blood cells from plasma to measure the volume percentage of erythrocytes (red blood cells) present. A hematocrit test involves centrifuging a blood sample to cause the heavy erythrocytes to settle at the bottom of the tube, which allows for a measurement of the proportion of RBCs relative to the entire blood sample. A normal hematocrit value is usually around 45%, and it is a critical indicator of the oxygen-carrying capacity of blood, with low hematocrit values indicating possible anemia.
Why are glycoproteins said to be peripheral?
They are said to be in peripheral because they are in the extracellular side and they are mostly involved with the inter cellular recognition and to be able to protect as they are serves as a protective coat, they also are responsible of maintaining the membrane’s asymmetry.
In the illustration, which site is an example of a trench ?
A
B
C
D
????
im pretty sure its D i agree with him.
Cells in cardiac muscle are able to contract in a coordinated fashion because of communication made possible through __________.
What stage of cellular respiration occurs after the formation of acetyl-CoA? Electron transport chain Fermentation Glycolysis Krebs cycle
Answer: Kreb cycle begins after the formation of acetyl-CoA.
Kreb cycle is also called as the Citric acid cycle (CAC) or Tricarboxylic acid cycle (TCA). It is a sequence of chemical reactions used by aerobic organisms for releasing energy by the oxidation of Acetyl CoA.
In Glycolysis, the oxidation of glucose results in 2pyruvate molecules which are converted to acetyl CoA. The products of the Kreb Cycle for 2 Acetyl CoA processed are
- [tex]6 NADH, 2 FADH_2, 2 ATP, \text{and }4 [/tex] [tex]CO_2[/tex]
How has agriculture affected nitrogen cycling? what are some negative consequences of nutrient enrichment?
Final answer:
Agriculture has greatly impacted nitrogen cycling, mainly through nitrogen fixation from synthetic fertilizers and legume cultivation, leading to nutrient enrichment and eutrophication in aquatic ecosystems, which cause ecological imbalances and water quality issues.
Explanation:
Impact of Agriculture on Nitrogen Cycling
Agriculture has significantly affected nitrogen cycling by increasing the amount of nitrogen fixation through the use of synthetic fertilizers and the cultivation of legumes like soybeans and alfalfa. Such agricultural practices have led to nutrient eutrophication in aquatic ecosystems, as excess nitrogen from fertilizers washes into water bodies, promoting algae blooms. These blooms consume oxygen and can lead to hypoxia, or low-oxygen environments, which can be detrimental to aquatic life.
Negative Consequences of Nutrient Enrichment
Nutrient enrichment can have several negative consequences including ecosystem imbalance due to increased algal growth, reduction in water quality, and the creation of "dead zones" where aquatic life cannot survive due to lack of oxygen. Eutrophication from agriculture run-off is a significant factor in this process, altering the food web and impacting the health of both the environment and human populations reliant on water bodies for drinking water and recreation.
State where bile is synthesized and explain the role of bile in digestion and excretion
The bile is synthesized and it is secreted from the liver and then stored in gall bladder.
What liver secretes?Liver secretes bile which has been stored in the gall bladder. Bile enters the duodenum just via the bile duct. Bile emulsifies lipids and transforming the large lumps of the lipids into tiny droplets, which has been provide the larger surface area for the digestion. This has been allow the lipid digestion to the proceed more rapidly.
Bile has been contains bile acids, which are the critical for the digestion and the absorption of the fats and fat-soluble vitamins in the small intestine. Many waste products has been including bilirubin, are the eliminated from the body by the secretion just into the bile and elimination in feces.
Bile aids in digestion by breaking down fats in the small intestine and carrying waste away, making specific proteins for blood plasma. Cholesterol and unique proteins are produced to assist the body in transporting fats. The liver's special ability to produce bile is essential to the organism's existence.
Therefore, The bile is synthesized and it is secreted from the liver and then stored in gall bladder.
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The point where the tibia meets with the femur
this is the patella i hoped this helped ;)
Waste solvents are flammable but not toxic true or false
Which is the correct procedure to put out a fire with a fire extinguisher after the pin is pulled?
To put out a fire with a fire extinguisher, remember the acronym PASS: Pull the pin, Aim the nozzle, Squeeze the trigger, and Sweep the nozzle from side to side. Following these steps ensures effective fire extinguishing in an emergency situation.
How to Use a Fire Extinguisher
Knowing how to operate a fire extinguisher by following four simple steps can be beneficial and potentially life-saving. The correct procedure to put out a fire with a fire extinguisher after the pin is pulled can be remembered using the acronym PASS.
Pull the pin: This will break the tamper seal and allow you to use the extinguisher.
Aim the nozzle: Point the nozzle or hose at the base of the fire.
Squeeze the trigger: This will release the extinguishing agent.
Sweep the nozzle from side to side: Move across the base of the fire until it is completely extinguished.
These steps ensure that you can effectively and efficiently put out a fire in an emergency situation.
A cell with a predominance of rough endoplasmic reticulum is most likely ________.
Directional growth of a plant in response to light is known as
Exercise releases chemicals in our bodies called __________ , which make us feel good.
Answer:
Endorphin is released
Explanation:
When we exercise, endorphin is released in the body. Endorphin produces a positive feeling. Due to the release of this chemical, we feel like as if our pain has reduced and hence endorphin fall into the category of analgesics. Endorphin is released by several parts of the body including the brain and spinal cord and bind to the neuron receptor in the same way as a pain medicine does.
Hence, while doing exercise it is the endorphin which is released in the body to make us feel good.
Consists of 206 named bones which make up the general framework of the body
Which curve shows the course of the reaction in the presence of an enzyme--the black curve or the red curve? Which line represents the activation energy for that reaction--a, b, or c?
"some __________ neurons are specialized to detect stimuli, whereas __________ neurons send signals to the effectors of the nervous system."
Some afferent neurons are specialized to detect stimuli, whereas efferent neurons send signals to the effectors of the nervous system.
What are Neurons?Neurons may be characterized as nerve cells that significantly sends or receives signal to and from the brain. These cells typically communicated with other cells of the body with the help of a junction which is known as a Synapse.
According to the physiology of the function of neurons, sensory neurons perceive as a set of information or messages from various sense organs like eyes, ears, nose, tongue, and skin and send them directly to the brain.
While the function of motor neurons is understood by the fact that these neurons send the perceived information and messages from the brain to the entire body at the target site.
Afferent neurons carry information from sensory receptors of the skin and other organs while efferent neurons carry motor information away from the central nervous system.
Therefore, some afferent neurons are specialized to detect stimuli, whereas efferent neurons send signals to the effectors of the nervous system.
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Explain how ozone is both beneficial and detrimental to human health
Answer:
There are both good ozone, and bad ozone. The good ozone help prevent uv rays from entering the earth, preventing skin cancer and other diseases. It is harmful by containing all the pollution and chemicals . That damages our lungs and causes chest pain, coughing, etc.
Explanation:
The first half i wrote, the second half was copied by the person above me.
1. Stratospheric ozone forms a protective layer in the atmosphere that helps in shielding living organisms from the Sun’s harmful ultraviolet (UV) rays and radiation, which causes skin cancer.
2. Ground-level ozone is the constituent element of smog and it is a harmful atmospheric pollutant that damages the lung and other internal organs when its breathed in.
Ozone is also referred to as trioxygen and it can be defined as a colourless, toxic, and unstable inorganic gas that has a pungent smell and it is formed from oxygen by ultraviolet lights.
Basically, ozone can be classified into two (2) main categories based on its benefits and these are:
1. Stratospheric ozone: this is a highly beneficial ozone and as such it is referred to as good ozone.
Stratospheric ozone forms a protective layer in the atmosphere that helps in shielding living organisms from the Sun’s harmful ultraviolet (UV) rays and radiation, which causes skin cancer.2. Ground-level ozone: this type of ozone is very harmful to the health and life of living organisms. Thus, it is known as bad ozone.
Ground-level ozone is the constituent element of smog and it is a harmful atmospheric pollutant that damages the lung and other internal organs when its breathed in.Read more: https://brainly.com/question/25048583
Peristalsis, which is controlled by ____, describes the movement of food along the digestive tract.
Peristalsis, controlled by the nervous system, describes the movement of food along the digestive tract.
Peristalsis, which is controlled by the nervous system, describes the movement of food along the digestive tract. It is an involuntary muscle contraction that pushes food forward through the esophagus, stomach, and intestines. This coordinated muscular movement allows for efficient digestion and absorption of nutrients.
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What is the main concern with coral harvesting methods?
a.
Coral harvesting methods are not economically profitable.
b.
The coral cannot regenerate quickly enough to recover from harvesting practices.
c.
Organisms that rely on coral are harmed by the methods, even though the coral is not.
d.
The coral is harmed by the methods, even though the organisms that rely on it are not.
Answer:
One concern I have is the metal frames. I wonder if they could damage the natural coral in the region or if fish and other sea animals could become trapped in them.
Explanation:
PLATO
what effect do enzymes have on chemical bonds
Enzymes have a direct and significant effect on the chemical bonds during a chemical reaction to a larger extent.
What are Enzymes?Enzymes may be defined as the types of biocatalysts that remarkably increases the rate of the chemical reaction without itself being consumed in the overall process. It may be thought that all cellular reactions and processes are mediated by enzymes.
Enzymes typically increase the rate of the chemical reaction by lowering its activation energy. Activation energy is a type of energy that a chemical reaction needs in order to initiate the process.
Here, comes the importance of the existence of enzymes. Enzymes usually bind to the reactant molecules and restrict them in such a way that the breaking and forming of chemical bonds occur more readily and efficiently.
Therefore, enzymes have a direct and significant effect on the chemical bonds during a chemical reaction to a larger extent.
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A (n)______ is a solid that settles out of a liquid solution in a chemical reaction
During which phase of the sexual response cycle does the refractory period begin? orgasm
The timing of the cell cycle in eukaryotic cells is controlled by a group of closely related proteins known as
Which of these are true about intraplate volcanism? select the two that apply?
Which act addresses abandoned hazardous waste sites with significant contamination?
Buddha is shown symbolically through a wheel or footprints as well as
Sperm are released out of the male reproductive system through the ____?
Answer:
urethra
Explanation:
Why would it be better to look at living cells than a dead ones?
One of the most crucial methods in cellular and molecular biology is cell culture because it offers a platform for studying the biology, biochemistry, physiology, metabolism, and other aspects of both healthy and diseased cells.
What is the importance of living cell in cell culture?They have a variety of advantages, such as being cheap, easy to use, providing an infinite supply of material, and not posing any ethical questions with the use of animal or human tissue.
One of the most important tools in cellular and molecular biology is cell culture.
Which offers superior model systems for studying the typical physiology and biochemistry of cells (such as metabolic studies, aging).
The effects of drugs and toxic substances on the cells, and mutagenesis and carcinogenics.
Therefore, In place of primary cells, immortal cell lines are frequently used in research.
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