Even if you live in the middle of North America, the quality of your watershed can affect the quality of the ocean. How can this be?
Evaporation carries materials from your watershed to the ocean.
Materials in your watershed are eventually transported to an ocean.
The amount of water in your watershed will affect ocean evaporation.
Materials in your watershed are not transported to an ocean.
The answer is B) Materials in your watershed are eventually transported to an ocean.
The third body, the apollo spacecraft, is assumed to have
A young man presents reporting diarrhea, fecal urgency, and weight loss. his stool is light-coloured and malodorous, and it tends to float and be difficult to flush. he has also noted tender, red bumps on his shins and reports pain and stiffness in his elbows and knees. sigmoidoscopy reveals discontinuous, granulomatous lesions; no blood is detected in his stool. which diagnosis would his care team first suspect?
Several fish species became extinct millions of years ago. The graphs provided below show the distribution of fossils of these fishes as they occur in several undisturbed layers of sedimentary rock observable in a cliff face. Respond to ALL 4 PARTS below: Explain why the distribution of the fossils in figure 1 support the hypothesis that the extinction of these species was a result of a sudden environmental change. Describe an environmental change that could have produced this kind of fossil distribution. Explain why the distribution of the fossils in figure 2 supports the hypothesis that the extinction of these species was a result of a gradual environmental change. Describe an environmental change that could produce this kind of fossil distribution.
How many crickets will a lizard need to consume if: There are 150 dietary calories in 100 grams of cricket. Crickets weigh 1.0 grams each. It takes 0.5 dietary calories for the lizard to do one pushup. The lizard spends 60 minutes a day doing pushups The lizard does these pushups every day for 30 days during the breeding season The lizard does push-ups at a rate of 10 push ups/ 30 seconds.
4500
6750
9000
12000
Frogs lay thousands of eggs because many eggs die. This is a behavior is an example of
Assume that a drop in parasite abundance reflects an effective immune response by the host. explain the pattern you described in question 2.
The _______ system is the primary system that prevents the risk of various infections.
When energy is used, ATP molecules convert to ADP molecules. This process is called _____. dephosphorylation phosphorylation oxidation diffusion
Answer:
B. Phosphorylation
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Vertebrates that are warm blooded, give live birth to live young, and nourish their young with milk would be classified as
Your answer is: Mammals
When the body needs to conserve water, the kidneys excrete a hypertonic urine. what do the terms isotonic and hypertonic mean? since the fluid that is to become urine begins as plasma (an isotonic solution), what must happen to change it to a hypertonic urine?
Isotonic- In an isotonic solution the solvent and the solute are equal in concentration.
Hypertonic- contains more solvent than the solute. In cases of urine, it means there is more water concentration compared to solutes such as glucose, Na ions, Cl ions or Urea.
Process of changing isotonic solution (plasma) to hypertonic solution
Blood enters the kidney through the renal artery which separates many times segmental arteries to interlobular arteries to arcuate arteries to interlobular arteries to afferent arteries which deliver blood to nephron. Afferent arterioles has a greater diameter than the efferent(carries blood from the nephron) hence forcing some components of blood out of glomerular capillaries such as water, salt, glucose, urea are passed to Bowmans capsule and are known as glomerular filtrate(contains about 20% of blood plasma) glomerular filtrate is passed from renal capsule to renal tube .Blood cells and plasma proteins are not filtered out because of their large size.
Reabsorption
Tubular reabsorption occurs through three mechanisms
Diffusion-movement of molecules\ions particles from an area of high concentration to an area of low concentration
active transport- a movement of molecules from a low concentrated area to a high concentrated area against a concentration gradient by use of energy
Osmosis-movement of water molecules from of hypotonic concentration to hypertonic concentration through a semi-permeable membrane.
Water and glucose are reabsorbed in the proximal convoluted tubule.There is a high concentration of sodium ions in the filtrate hence it moves from tubular fluids to the proximal convoluted tubule. Other substances that are reabsorbed include glucose, amino acids, lactic acids and bicarbonate ions. 80% of water is reabsorbed through diffusion.
In the loop of Henle, the remaining water, dissolved salts and urea passes through the descending loop of Henle (permeable to water and less permeable to Na, Cl, and urea) this being so it increases the osmotic gradient hence the solutes are reabsorbed by the ascending loop of Henle (permeable to Cl and Na ions impermeable to water)
In the distal convoluted tubule the anti-diuretic hormone makes cells to be more permeable to water hence allows more water to go back to the blood.
Final answer:
The kidneys excrete hypertonic urine to conserve water by reabsorbing solutes from the isotonic plasma, thus increasing the urine's osmolarity. Isotonic solutions have equal solute concentrations in the cells, whereas hypertonic solutions have higher solute concentrations, leading to water exiting the cells.
Explanation:
When the body needs to conserve water, the kidneys excrete hypertonic urine. The terms isotonic and hypertonic are relative measures of osmolarity, or solute concentration, of a solution compared to another solution. In an isotonic solution, the extracellular fluid has the same osmolarity as the cell, which means there will be no net movement of water into or out of the cell. A hypertonic solution, conversely, has a higher concentration of solutes compared to another solution, leading to water moving out of the cells into the surrounding fluid.
Plasma is considered an isotonic solution to the body's cells. To convert the isotonic plasma to hypertonic urine, the kidneys must actively reabsorb solutes from the to-be-excreted fluid back into the bloodstream, thus elevating the osmolarity of the urine. This process ensures that water is retained in the body, especially when dehydrated or when the body needs to maintain higher water retention. The kidneys' ability to adjust the osmolarity of urine is fundamental to maintaining homeostasis within the body.
What is the function of the Compact Bone?
Final answer:
Compact bone is the dense external layer of bones that provides protection and strength. It consists of units called osteons, which are aligned parallel to the long axis of the bone. The osteons contain a mineral matrix, living osteocytes, and canaliculi that transport blood.
Explanation:
Compact bone, also known as cortical bone, is the hard external layer of bones and surrounds the bone marrow. Its main function is to provide protection and strength to bones. Compact bone tissue is made up of units called osteons, which are cylindrical structures that contain a mineral matrix and living osteocytes connected by canaliculi. These canaliculi transport blood and the osteons are aligned parallel to the long axis of the bone. Each osteon consists of layers of compact matrix called lamellae that surround a central canal called the Haversian canal, which contains the bone's blood vessels and nerve fibers. Compact bone tissue is located in areas of bone where stresses are applied in only a few directions, helping the bone resist bending or fracturing.
The recent acts of activists intent on destruction of research plots included plants altered by molecular as well as classical genetic techniques. is it possible to distinguish between plants altered by classical genetics and those altered by modern techniques? if it is possible how is it done?
Yes, it is possible to distinguish between plants altered by classical genetics and those altered by modern techniques by analyzing specific markers and using DNA analysis.
Explanation:
Yes, it is possible to distinguish between plants altered by classical genetics and those altered by modern techniques. One way to do this is by analyzing the presence of specific markers that are associated with each method. For example, classical genetic techniques often result in random insertions or deletions in the genome, which can be identified through DNA sequencing. On the other hand, modern techniques such as genetic engineering involve the precise insertion of specific genes into the plant's genome, which can also be detected through DNA analysis. Scientists can use various molecular biology techniques to analyze the DNA of plants and determine whether they have been altered using classical or modern methods.
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A J-shaped curve is called a(n) _______.
Answer:
Exponential curve
Explanation:
The growth of population is represented with the help of population growth curves.An exponential growth curve is a J- shaped curve that shows the growth of the population in areas where there are unlimited resources present. In the presence of unlimited resources, there is a very fast growth of population however this growth decreases as the resources become limited.The pattern formed from such an increasing population size in the presence of unlimited resources results in a J-shaped exponential growth curve.Example- bacterial growthIn mantle convection currents, hotter rock moves _______, while cooler rock moves _______.
Answer:In mantle convection currents, hotter rocks move ___upward___, while cooler rocks move ____downward____
Explanation:
Which characteristic sets hominins apart from other primates?
Andra is having a hard time remembering all the parts of a microscope. To help her label a microscope diagram on her test, she could use: A. keywording B. repetition C. categorization D. visualization
Answer:
D. visualization
Explanation:
A visualization techniques is used to remember things through image perception. It helps to realize the things on ground and correlate with its guided imagery. Through the minds’s eye an individual focuses on actual images. Here, if instead of teaching microscope through diagrams in book, Andra is shown the real microscope and all its parts better explained, then she would be able to remember the tings for a very long period of time.
A mutation within a gene that will insert a premature stop codon in mrna would ________. result in a longer polypeptide chain result in a shortened polypeptide chain change the location at which transcription of the next gene begins have the same effect as deleting a single nucleotide in the gene
Answer:
Option B, result in a shortened polypeptide chain
Explanation:
Premature stop codon causes mutation which is called as non-sense mutation. In a non-sense mutation, the nonsense codon do not code for any amino acid instead they stop the coding and causes end of protein synthesis. Due to this, proteins are not synthesized to their full length and are also incomplete. These proteins are mostly nonfunctional, inactive and mutated.
Hence, option B is correct
A liver biopsy of a four-year-old boy indicated that the fructose-1,6-bisphosphatase enzyme activity was 20% of normal. the patient's blood glucose levels were normal at the beginning of a fast but then decreased suddenly. pyruvate and alanine concentrations were also elevated. explain the reason for this symptom.
The low fructose-1,6-bisphosphatase enzyme activity in the liver biopsy of the four-year-old boy leads to a decrease in glucose production during fasting. This deficiency impairs the conversion of fructose-1,6-bisphosphate to fructose-6-phosphate, causing a sudden decrease in blood glucose levels. The elevated pyruvate and alanine concentrations indicate the impairment of glycolysis.
Explanation:The fructose-1,6-bisphosphatase enzyme plays a crucial role in the breakdown of glucose during fasting. It converts fructose-1,6-bisphosphate into fructose-6-phosphate, an important step in glycolysis. In this case, the liver biopsy showed that the enzyme activity was only 20% of normal, leading to a decrease in glucose production.
Normally, during fasting, glucose is released from glycogen stores in the liver to maintain blood glucose levels. However, with reduced fructose-1,6-bisphosphatase activity, the body's ability to produce glucose is impaired, causing a sudden decrease in blood glucose levels.
This deficiency also leads to the accumulation of pyruvate and alanine because the conversion of fructose-1,6-bisphosphate to fructose-6-phosphate is compromised. These elevated concentrations further indicate the impairment of glycolysis.
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According to the dichotomous key, the organism pictured would be a member of the kingdom
Answer:
It's a Gibbon or orangutanExplanation:
I just assume because I answered a question like this if it's wrong I'm sorry...
Why does a desert have a dramatic change in temperature during the day and at night? Because
c. significally lower
i had the same question its the RIGHT ONE
Which part of a tree always grows down because of gravity?
A eukaryotic cell that is involved in synthesizing large amounts of protein might be expected to have
A eukaryotic cell that synthesizes large amounts of protein is expected to have a significant number of ribosomes and a well-developed endoplasmic reticulum and Golgi apparatus, as well as numerous mitochondria for energy.
A eukaryotic cell that is involved in synthesizing large amounts of protein might be expected to have numerous ribosomes, a well-developed endoplasmic reticulum (ER), particularly the rough ER where ribosomes are attached for protein synthesis, and a sizeable Golgi apparatus for modifying, sorting, and packaging the proteins.
Proteins are critical to a cell's functions, and ribosomes are the macromolecular machines that synthesize proteins. The rough ER is involved in the production of proteins destined for insertion into the cell membrane, secretion, or use in lysosomes. The smooth ER is associated with lipid synthesis and detoxification processes. After synthesis, proteins are transferred to the Golgi apparatus, which further modifies them and directs them to their final destinations.
In addition to ER and Golgi, you would expect such a cell to have significant numbers of mitochondria for providing the necessary energy (ATP) required for the protein synthesis process.
Ocean currents are caused by all of the following except:
underwater landslides
surface winds
tidal fluctuations
density contrasts in seawater
A nurse is preparing a 24-hour-old baby boy for circumcision. the hospital policy guidelines for circumcision support pain medication at least 1 hour prior to the start of the procedure. the provider did not order the pain medication. the provider arrives, and the nurse refuses to bring the baby for the circumcision stating that the pain medication was not ordered. which is the rationale for refusing to bring the baby for the procedure?
The nurse refused to bring the baby for the circumcision due to the lack of ordered pain medication, which the hospital policy states should be administered an hour beforehand to manage the newborn's high pain sensitivity.
The nurse's rationale for refusing to bring the baby for the circumcision procedure is based on the hospital's policy guidelines, which support administering pain medication at least 1 hour prior to the procedure to manage the infant's sensitivity to pain.
Immediately after birth, newborns are highly sensitive to touch and temperature, and they react strongly to pain with increased blood pressure, heart rate, and stress hormones. Without proper pain management, such as local anesthetics, the infant could experience significant distress and potential long-term effects.Which component of Earth's atmosphere is responsible for absorbing ultraviolet radiation? A. OZone B. Nitrogen C. Water vapor D. Oxygen
Which term describes materials that have large and connected pores, such as sand and gravel
The stage in which an ecosystem rapidly gains biomass through the introduction of plants with woody stems is called?
The answer is Aggregation.
During plant succession new community gets established at an area which had been uninhabited. The community which gets established at the site is called climax community. The aggregation is the stage during which there is increase in population of the species which has become established in the area. The shrubs replace the small herbs. This adds up biomass by introduction of more plants with woody stem. This also proves as a source of food for future inhabitants.
A medical researcher is studying the spread of a virus in a population of 1000 laboratory mice. during any week, there is a 70% probability that an infected mouse will overcome the virus, and during the same week there is a 40% probability that a noninfected mouse will become infected. two hundred mice are currently infected with the virus. how many will be infected next week and in 3 weeks? (round your answers to the nearest whole number.)
Calculate the number of mice infected with the virus next week and in 3 weeks based on given probabilities and the initial infected count.
The number of infected mice next week:
Initially infected mice = 200
Number of mice overcoming the virus = 0.7 * 200 = 140
Number of mice getting infected = 0.4 * (1000 - 200) = 320
Number of infected mice next week = 140 + 320 = 460
The number of infected mice in 3 weeks:
Number of mice next week = 460
Number of mice overcoming the virus = 0.7 * 460 = 322
Number of mice getting infected = 0.4 * (1000 - 460) = 216
Number of infected mice in 3 weeks = 322 + 216 = 538
When a plant is using transpiration to cool off during the day, its stomates are _______ and its water potential is _______ that of the soil. at night, the plant's water potential will be _______ that of the soil (assuming that the soil is receiving sufficient moisture)?