how has bioaccumulation resulted in the deaths of large numbers of bird even though the toxin level in the lake water is not high enough to make them sick
Answers
Gobies that have accumulated poisons are consumed by birds. Dangerous quantities of naturally existing poisons are transferred to top-level predators by the food chain, increasing their concentration.
Toxins that are ingested by animals when they consume contaminated food or water move up the food chain and become more concentrated until they are consumed by predators at the top of the food chain along with toxic prey.
Biomagnification is the term for this procedure. Higher up the food chain, or as we move up the trophic levels, the number of harmful non-biodegradable compounds that collect within an organism's body increases.
They accumulate in higher levels of the food chain after being absorbed by creatures at the bottom of the food chain.
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Related Questions
In the body of a developing baby, what does the notochord become? a) the rib cage b) the vertebral column c) the spinal cord d) the spleen
Answers
The correct option is b ; The vertebral column , The outer layer of the notochord condenses in areas to form the vertebrae of the spine during the late stages of embryonic development.
The somite is made up of two parts: a dorsal dermomyotome and a ventral sclerotome. The dermomyotome is the origin of the trunk's dermis and myocytes on the dorsal side. The sclerotome cells migrate and encase the notochord, forming the primordial or membranous vertebral column and ribs.
The notochord is an important structure that forms during embryonic development and serves as a template for the development of the vertebral column. Over time, the notochord is replaced by the vertebral column, which becomes the primary structure supporting the body and protecting the spinal cord.
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If your body gets too cold, then your muscles start to shiver, which helps raise body temperature *
True or False?
Answers
Answer:
True
-----------------
Because skeletal muscles to bring about rapid contractions that generate heat.
When assigned to a cell, the ____ function returns a number that corresponds to the system date and time beginning with december 31, 1899.
Answers
When assigned to a cell, the "NOW" function returns a number that corresponds to the system date and time beginning with December 31, 1899. This function is helpful for keeping track of real-time data in spreadsheets and updating the information automatically.
When assigned to a cell, the NOW() function returns a number that corresponds to the system date and time beginning with December 31, 1899. This means that every time you use the NOW() function in a cell, it will display the current date and time. The number that is returned by the NOW() function is actually a serial number that Excel uses to represent dates and times. This serial number is the number of days that have elapsed since December 31, 1899, and the time is represented as a decimal value between 0 and 1. So, for example, if you enter the NOW() function in a cell at 12:00 PM on January 1, 2022, it will return a value of 44525.5, which represents 44,525 days since December 31, 1899, and a time value of 0.5, which represents 12:00 PM.
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the evolutionary ancestor of all modern placental mammals, including the group from which the horse evolved:_____.
Answers
The evolutionary ancestor of all modern placental mammals, including the group from which the horse evolved, is called Eutheria.
Eutheria is a group of mammals that underwent evolutionary development, eventually giving rise to various species, including the horse. The evolutionary ancestor of all modern placental mammals, including the group from which the horse evolved, is believed to be a small, shrew-like creature that lived about 65 million years ago. This creature, known as the common ancestor of placental mammals, is thought to have given rise to a diverse range of mammals, including primates, rodents, carnivores, and ungulates like the horse.
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Please help serious inquiries only
Answers
Answer:
it matches with a specific antigen
Where is the location of translation
Answers
Translation takes place in the ribosomes, which are the site of protein synthesis.
The process of translation involves the conversion of messenger RNA (mRNA) into a polypeptide chain. This is accomplished through the interaction of transfer RNA (tRNA) molecules with the mRNA sequence and with the ribosome's large and small subunits.Most of the proteins made by the cell are synthesized on ribosomes that are bound to the endoplasmic reticulum (ER) and transported into the ER's interior, where they are folded, processed, and transported to their final destination inside or outside the cell.Translation is a process that occurs in two phases: initiation and elongation.
During initiation, the ribosome assembles onto the mRNA and selects the correct start codon to begin translation. Then, during elongation, the ribosome moves along the mRNA, matching each codon with the appropriate amino acid-bearing tRNA to build the growing polypeptide chain. Finally, termination signals end translation and release the newly synthesized protein from the ribosome.
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List the three processes involved in the formation of urine in order. 1. tubular secretion 2. tubular reabsorption 3. glomerular filtration
Answers
In this question, We list the three processes involved in the formation of urine in order. 1. glomerular filtration 2. tubular reabsorption 3. tubular secretion
Steps of urine production
Inside the renal capsule, the blood undergoes strong pressure, which causes the output of the so-called glomerular filtrate (or initial urine), a liquid similar in composition to blood plasma. This process is called filtration. The filtrate is mainly made up of water, urea, glucose, salts and amino acids. It is important to remember that blood cells and some larger proteins do not pass into the capsule.
After leaving the renal capsule, the filtrate passes through the length of the nephric tubule and water and useful substances are reabsorbed into the body. These substances go back into the bloodstream. Most of the reabsorption occurs in the proximal tubule region.
In the tubules, the process of secretion also takes place, in which some metabolites and drugs are carried from the blood vessels into the tube.
After passing through the entire nephric tubule, we have the filtrate transformed into urine.
With the information obtained, we list the three processes involved in the formation of urine in order. 1. glomerular filtration 2. tubular reabsorption 3. tubular secretion
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What role does respiration play in the cycling of carbon?
1. it releases carbon dioxide gas that was once part of living cells into the atmosphere
2. it takes in carbon dioxide from the atmosphere and uses it to build sugars
3. it removes carbon dioxide from the atmosphere and fixes it into organic compounds
4. it releases as much carbon dioxide as it takes in so it has no overall role in the cycle
Answers
Answer:
Photosynthesis by land plants, bacteria, and algae converts carbon dioxide or bicarbonate into organic molecules. Organic molecules made by photosynthesizers are passed through food chains, and cellular respiration converts the organic carbon back into carbon dioxide gas.
to what diameter must it be expanded to increase the blood flow by a factor of 5.0 with no change in pressure?
Answers
Increasing the radius of the vessel by a factor of the square root of 5 would increase blood flow by a factor of 5.0 while maintaining constant pressure.
The relationship between blood flow, pressure, and diameter of a vessel is complex and influenced by many factors, such as the viscosity of the blood, the elasticity of the vessel walls, and the resistance of the vessel to distension. However, in general, blood flow is directly proportional to the fourth power of the radius of a vessel. This is known as Poiseuille's law.
If we want to increase the blood flow by a factor of 5, we need to increase the radius of the vessel by a factor of the square root of 5.
The formula to calculate the diameter:
Diameter = (5^(1/4)) * Diameter_initial
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The first branch onan evolutionary treeis... A. the most complex. B. The most recently evolved.D. the common ancestor
Answers
Evolutionary tree
The first branch on an evolutionary tree is the common ancestor of all the lineages that stem from it, it is the furthest temporarily from the present.
Therefore, the correct answer to this question is option D.
class 9th biology chapter 15 improvement in food resource what type of best doubts can we ask? can u say some questions??
Answers
Answer: What is the most sustainable way of food resource?
What can drastically effect our food resources and what could we do about it?
What food can we eat for the most time to survive?
ASAP PLS
1. In the stem of a plant that is bending toward the light, auxins are most concentrated in:
1. the top surface of the leaves
2. the bottom surface of the leaves
3. the side of the stem facing the light
4. the side of the stem away from the light
2. Which organism has a distinct central nervous system?
1. starfish
2. jellyfish
3. crayfish
4. clam
Answers
Auxins are primarily concentrated on the side of a plant stem that is bending in the direction of the light. Crayfish is an organism with a unique central nervous system.
What portion of the plant concentrates auxin?As a result, even though auxins are present in all plant tissues, their concentration is highest at the plant's top and declines towards the roots.
Which side of the stem contains the most auxin?Auxins are distributed throughout plants under typical lighting conditions. Nevertheless, auxin is broken down on the stem's sunnier side when the amount of sunshine varies. The plant cells on the shady side grow more due to the higher auxin content, causing it to bend towards the light.
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ilang hati ang gagawin mo sa pizza? bakit?
Answers
Answer:
I will make 8 slices....
because I do love it....
it depends on you and ur choice how many pieces of what type of shape you want to have...
Lab: Natural Selection
Please someone help me do this lab report. Its about natural selection. It would mean so much!!
INTRODUCTION: (in one paragraph, state the purpose of the lab, the question being addressed and a one to two sentence summary of the lab)
HYPOTHESIS: (Present your hypothesis being tested in the lab as an “If.. Then…” statement)
PROCEDURE: (Provide a brief summary of was done in the lab experiment. Refer to the lab guide for the complete procedure)
Results/Data
1. Data- Environment with equal amounts of insects, seeds, and fruits
Answers
A researcher can concentrate on his subject of study with the aid of the purpose statement, research questions, hypotheses, and research objectives.
How should a hypothesis be presented in a research paper?A journal article's opening sentences serve to introduce the subject, present the author's hypothesis or thesis, and explain why the study was conducted. Sometimes a thesis or hypothesis is not labeled explicitly, therefore you may need to read the introduction to figure out what the writers are advocating.A researcher can concentrate on his subject of study with the aid of the purpose statement, research questions, hypotheses, and research objectives. A deeper grasp of what to accomplish results from this focus. Not all study formats include every element, nor are all elements usually necessary.To learn more about hypotheses refer to:
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warm fronts appear on weather maps in areas of
Answers
Answer:
On a weather map, a warm front is usually drawn using a solid red line with half circles pointing in the direction of the cold air that will be replaced. Warm fronts usually move from southwest to northeast. ... A cold front is the transition area where a mass of cold air moves in to replace a mass of warm air.
Explanation:
Answer:Which object is created during the formation of a star?
a nebula
a protostar
a supergiant
a supernova
Explanation:
if a person inherits two mutant genes that encode hydroxyphenylpyruvate oxidase, what metabolite will accumulate?
Answers
Phenylalaine metabolite will build up if a person acquires two mutant genes for hydroxyphenylpyruvate oxidase.
The metabolite in a positive drug is what?When a drug breaks down inside the body, a metabolite is created. In essence, it denotes the transformation of the original medication into a different substance. Drug tests involving cannabis are meant to find THC intermediates since they last in the body considerably longer than THC does.
Where can I find metabolites?Metabolites are the by products of enzymatic pathways that are catalysed by numerous enzymes found in cells. Although it is frequently used to describe larger entities, this phrase is mostly used to describe tiny molecules.
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PLEASE HELP ME! I HAVE NO BRAIN CELLS.
Some minerals are evenly distributed around the planet, while other minerals are quite rare. Why are some minerals so rare and unevenly distributed?
A. Certain minerals form only under high heat and pressure that develop near volcanoes.
B. Certain minerals form only in Earth's crust, so they are difficult to locate.
C. Certain minerals form only in specific climates, and not all climates, are the same around the world.
D. Certain minerals form only in the extreme heat found at the bottom of lakes and rivers.
Answers
Answer:
C
Explanation:
Minerals, fresh water, and biosphere resources are distributed unevenly around the planet as a result of past geologic processes. ... Mineral, fresh water, ocean, biosphere, and atmosphere resources are limited, and many are not renewable or replaceable over human lifetimes.
The option (C) is correct. Certain minerals form only in specific climates, and not all climates, are the same around the world.
What are minerals?A mineral is a naturally occurring inorganic element or compound having an orderly internal structure and characteristic chemical composition, crystal form, and physical properties. Common minerals include quartz, feldspar, mica, amphibole, olivine, and calcite.
Moreover, the major minerals, which are used and stored in large quantities in the body, are calcium, chloride, magnesium, phosphorus, potassium, sodium, and sulfur. The trace minerals are just as vital to our health as the major minerals, but we don't need large amounts.
Therefore, economic minerals are used in a wide range of applications related to construction, manufacturing, agriculture and energy supply. Economic minerals include: Energy minerals used to produce electricity, fuel for transportation, heating for homes and offices and in the manufacture of plastics.
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If nondisjunction occurs in the first meiotic division, how many of the four possible gametes produced from meiosis will have the wrong number of chromosomes?.
Answers
If nondisjunction occurs in the first meiotic division, all four of the possible gametes produced from meiosis will have the wrong number of chromosomes.
In the field of biology, nondisjunction can be described as a situation in which the chromosomes or chromatids that are homologous are unable to separate from each other during the process of meiosis.
If nondisjunction occurs at the first stage of meiotic division, then this means that all four gamete cells will be affected. Due to this nondisjunction, two of the gametes will have both the pair of homologous chromosomes whereas the other two will not receive any chromosomes.
Hence, all four gamete cells will be affected and have the wrong number of chromosomes as a result of nondisjunction during the first meiotic division.
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Populations of a European salamander, Proteus anguinus, live in underground caves that have a limited food supply. One of the salamander's adaptations is the
ability to significantly reduce its rate of metabolism when food is scarce.
Which of the following statements best describes how the process of natural selection led to this adaptation.
Answers
The adaptation of significantly reducing the rate of metabolism in the European salamander, Proteus anguinus, evolved through natural selection as individuals with this trait had higher survival rates and reproductive success in environments with limited food supply.
The process of natural selection led to the adaptation of the European salamander, Proteus anguinus, to significantly reduce its rate of metabolism when food is scarce. Natural selection is the mechanism by which individuals with advantageous traits for their environment have higher survival rates and reproductive success, leading to the increased prevalence of those traits in subsequent generations.
In the case of the salamander, the limited food supply in underground caves created a selective pressure favoring individuals that could conserve energy during periods of food scarcity. Salamanders with the ability to reduce their metabolic rate had a higher chance of survival as they could survive longer without food, making them more likely to reproduce and pass on this adaptive trait to their offspring.
Over time, through the process of natural selection, the individuals with the ability to lower their metabolic rate became more prevalent in the salamander population. This adaptation allowed them to better cope with the limited food supply in the caves, maximizing their chances of survival and reproductive success.
Therefore, the ability to significantly reduce the rate of metabolism in response to scarce food evolved in the salamander population as a result of natural selection, enabling them to thrive in their underground cave habitats.
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PLS HELP FOR BRAINLIEST
Answers
Answer:
Every cell has a LIPID membrane so it is nit soluble in water
Explanation:
I’m not completely sure
Plant cells have large, round vacuoles they primarily use for -
A) water storage
B) energy production.
C) protein synthesis.
D) waster removal
Answers
Answer: the answer is water storage
Explanation: i just got it right
Explanation: energy production would be the mitochondria, Protein synthesis would be ribosomes and waste removal would be lysosomes
fill in the blank. cellular proliferation can be grouped into the three categories __________,
Answers
Cellular proliferation can be grouped into the three categories: continuous, stable, and labile.
Cellular proliferation is defined as the process by which cells divide and multiply. It's a process in which cells reproduce to create new cells. It is a mechanism that allows organisms to develop and maintain their tissues and organs.Cells are divided into three groups based on their proliferation abilities. There are three classifications of cellular proliferation: continuous, stable, and labile. They're classified based on their ability to multiply and grow.
Continuous cells are cells that divide at a constant rate throughout their lives. They have an infinite capacity for self-renewal and can regenerate after injury or disease. They're always dividing. Stem cells in the bone marrow and gut are examples of continuous cells.
Stable cells are cells that are mostly non-dividing but can enter the cell cycle when needed. Their proliferation rate is slower than continuous cells. Their ability to self-renew is limited and may only occur under certain circumstances. They're able to regenerate after injury or disease. Examples of stable cells include hepatocytes and smooth muscle cells.
Labile cells are cells that are always dividing and can't stay in the G0 phase. They're actively dividing and regenerating. Their life span is short, and they're constantly being replaced. The skin and the lining of the gut are examples of labile cells.
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Define translation (adding for extra letters cuz it had to be 20 characters long so ignore this)
Answers
How much a dna is unique to an individual
Answers
DNA is 99.9% identical from person to person as individual although 0.1% difference doesn't sound like a lot it actually represents millions of different locations within the genome where variation can occur.
What is DNA ?DNA is the hereditary material in humans and almost all other organisms the molecule inside cells that contain the genetic information responsible and function of an organism.
DNA is a linear molecule composed of four types of smaller chemical molecules called nucleotide bases such as:
Adenine (A), cytosine (C), Guanine (G), thymine (T).Therefore DNA is 99.9% identical for individual its a hereditary material in human and almost all other organisms.
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what animals can be used to replace human parts?
cattle
sheep
goat
pig
Answers
Answer:
Pig
Explanation:
Pig valves are already used successfully in heart transplants. Human-to-human organ transplantation has only been around since the 1950s, and scientists have been working on animal-to-human transplants for almost that long. In the '60s, Keith Reemtsma experimented with transplanting chimpanzee kidneys into humans.
Answer:
Pig
Explanation:
This process is called Xenotransplantation. The animal organ, probably from a pig or baboon could be genetically altered with human genes to trick a patient's immune system into accepting it as a part of its own body. (Wikipedia)
Hypothesize about tumor growth. Scientists have shown that tumor growth is an example of positive feedback loops. Why is tumor growth an example of positive feedback? In your answer elaborate using the following terms stimulus, receptor, control center, effector, response.
Answers
Answer:
Tumor growth is a process associated with the expression of oncogenic genes
Explanation:
The tumor cells often share oncogenic receptors that are expressed during oncogenesis. For example, it has been shown that the epidermal growth factor receptor is often mutated in brain cancer cells, thereby encoding an oncogenic that is overactive. These receptors are responsive to stimulus of nearby cells and thus act as effectors that amplify tumorigenic signals. In consequence, during tumor progression, tumorigenic effector cells have an uncontrolled proliferation and antiapoptotic signals are predominant. The nucleus in the cell functions as a control center where tumor suppressor genes are transcribed to fight against such oncogenic cells.
Increased levels of carbon dioxide in the atmosphere have been implicated in which of the following?
Answers
Answer:
Both increased global warming and increased seawater acidity.
Explanation:
Good luck!
what is the meaning of gravity
Answers
Explanation:
1 : a force of attraction that tends to draw particles or bodies together.
2 : the attraction of bodies by the force of gravity toward the center of the earth.
3 : great seriousness.
A clinical laboratory that identifies the bacterial agents that cause human disease would refer to Bergey's Manual of ______ Bacteriology for guidance in identification.
Answers
Answer:
Systematic
Explanation:
Why are the recombinants produced from an Hfr×F− cross rarely, if ever, F+?Because the conjugation tube is fragile, the likelihood for complete transfer is low.Because the F factor is the last element to be transferred, the likelihood for complete transfer is low.Because the F factor is the first element to be transferred, the likelihood for complete transfer is high.Because the F factor is the last element to be transferred and the conjugation tube is fragile, the likelihood for complete transfer is low.
Answers
The recombinants produced from an Hfr×F− cross are rarely, if ever, F+ because the F factor is the last element to be transferred during conjugation.
The likelihood of complete transfer of the F factor is low because the conjugation tube is fragile and can rupture before the transfer of the F factor is complete. Additionally, the F factor is small and can be lost or left behind in the conjugation tube, leading to incomplete transfer. As a result, the recombinants produced from an Hfr×F− cross are rarely, if ever, F+.
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