The largest concentrations of PCBs are found in the bodies of predators at the top of the food chain or nearby (such as birds and fish).
In the food chain, what is PCB?Polychlorinated biphenyls (PCBs) and dioxins are hazardous substances that linger in the environment and build up in the food chain. Since the 1970s, their prevalence in the environment in Europe has decreased as a result of coordinated efforts by government agencies and business.
Food, which accounts for over 90% of exposure in people and has the highest amounts in fish (such as salmon and shellfish), dairy products (particularly milk and butter), and animal fat, accumulates PCBs in organisms through the food chain.
Polychlorinated biphenyls, or PCBs, are dangerous industrial substances.
learn more about PCB refer
https://brainly.com/question/23941791
#SPJ9
Write a statement about each of the classification of matter
The three states of matter are solids, liquids, and gases.
Solids have strong intermolecular forces keeping the molecules together in a definite shape.Liquids have weak intermolecular forces between the molecules.Gases have negligible intermolecular forces between the molecules.What is matter?Matter is defined as anything that has mass and occupies space.
Matter is the material from which the universe is made.
Matter exists in three main physical states which have different properties.
The different states of matter can also be interconverted between each other.
The three states of matter are:
SolidLiquidsGasesSolids are forms of matter which have definite shape and volume.
Solids have strong intermolecular forces keeping the molecules together in a definite shape.
Liquids are forms of matter which have no definite shape but have definite volumes.
Liquids have weak intermolecular forces between the molecules.
Gases are forms of matter which have no definite shape nor definite volumes.
Gases have negligible intermolecular forces between the molecules.
Learn more about states of matter at: https://brainly.com/question/20348735
#SPJ1
The polarity of water is partly responsible for the movement of water molecules through fine tubes such as those in wood and other plant parts. this is called ______.
All epithelia have two surfaces, an apical surface and a basal surface, that differ in both structure and function. This property is called polarity.
All epithelia have two surfaces, an apical surface and a basal surface, that differ in both structure and function. This property is called polarity. TRUE.
The majority of cell types have polarized structures or protein localization patterns that enable them to carry out certain tasks.Cells having apical and basolateral membrane domains separated by adherents and tight junctions are indicative of epithelial cell polarity.Cell polarity is the term for the inherent asymmetry that can be seen in a cell's form, organization, or combination of cellular components. The majority of epithelial cells, cells that migrate, and cells that are growing need some kind of cell polarity to operate. A phospholipid bilayer or sandwich makes up the majority of the cell membrane. While the tails (the lipid component) are non-polar, the heads (the phospho part) are polar.learn more about polarity here: https://brainly.com/question/1433127
#SPJ4
________ epithelium provides a moist and slippery surface and is well suited to resist stress, as seen in the __________
Nonkeratinized epithelium provides a moist and slippery surface and is well suited to resist stress, as seen in the vagina.
What is non-keratinized tissue?This squamous epithelium is stratified and contains keratin protein. It is an unproteinated stratified squamous epithelium. What use does non-keratinized compound epithelium serve?A mucous membrane, which acts as an extra protective and lubricating layer of the epithelium, is typically present on non-keratinized epithelium. It can be found in some areas of the vagina, ureters, vaginal wall, pharynx, esophagus, and external female genitalia.What distinguishes keratinized epithelium from nonkeratinized epithelium?The main distinction between keratinized and nonkeratinized epithelium is that the latter is permeable to water while the former is impenetrable to it. Additionally, keratinized epithelium is a more effective barrier than nonkeratinized epithelium.
To learn more about non-keratinized epithelium visit:
https://brainly.com/question/11126296
#SPJ4
Which does Kepler’s second law state about planetary motion?
Answer:
I would say that Kepler’s second law of planetary motion implies That a planet moves faster when it is closer to the Sun.According to Kepler's Second Law, the imaginary line joining a planet and the Sun sweeps equal areas of space during equal time intervals as the planet orbits. Basically, that planets do not move with constant speed along their orbits. This law explains the speed of a planet traveling in an elliptical orbit around the Sun. Kepler’s second law of planetary motion implies a planet moves faster when it is closer to the Sun.
Explanation:
Once the viral dna of a retrovirus is stably integrated into the host cell genome, it is referred to as a(n):______.
a. enveloped virus
b. nonenveloped virus
c. provirus
d. oncovirus
Integration of the viral DNA effects in the endless insertion of the viral genome into the host chromosomal DNA is referred to as a provirus in the case of retroviruses or prophage in the subject of prokaryotic viruses.
What do host cells do?A live cell that houses and provides sustenance for an alien creature is called a host cell. Two organisms are considered to be in a symbiotic relationship when they coexist and have a tight, sustained biological interaction. A virus can literally take over the functions of its host when it comes into touch with a host cell and implant its genetic material. Instead of its regular output, an infected cell generates more viral protein and genetic material. an organism or cell that has contracted a virus or another kind of microbe. A virus is a tiny, contagious particle that can only multiply when it infects a host cell. In essence, viruses reprogram the host cell to become a virus factory as they "commandeer" it and use its resources to produce other viruses. Viruses are not regarded as living things because they are unable to replicate on their own (without a host).
Therefore the correct answer is c. provirus
To learn more about host cell genome, refer to:
https://brainly.com/question/15391411
#SPJ4
This is a muscle with four head
a. biceps brachii
b. quadriceps femoris
c. pronator teres
d. triceps brachii
(b) quadriceps femoris is the right response. This is a muscle with four heads.
In the front of the thigh, there is a collection of muscles known as the quadriceps femoris. The vastus lateralis, vastus medialis, vastus intermedius, and rectus femoris are the four distinct muscles that make up the quadriceps, which in Latin means "four headed."
The femur bone serves as the origin of each vastus muscle, which attaches to the patella, or kneecap. The rectus femoris, which also connects to the kneecap, partially encloses the three vastus muscles. The rectus femoris, in contrast to the vastus muscles, enters into the hip bone.
The femoral nerve (and its following branches) innervates the muscle group, which is supplied with oxygenated blood by the lateral femoral circumflex artery and its branches.
Here is another question with an answer similar to this about quadriceps femoris: https://brainly.com/question/28317248
#SPJ4
What was Earth's early atmosphere like before cyanobacteria?
Answer:
Oxygen-free
Explanation:
Before about 2.4 billion years ago, Earth was a virtually oxygen-free environment. The appearance of cyanobacteria, or blue-green algae, changed all that. Cyanobacteria injected the atmosphere with oxygen, setting the scene for the development of complex life as we know it.
You are researching a population of moles. In the course of your research, you identify a nearby population that occasionally comes into contact with your study population. What best describes the evolutionary process at work?.
Gene flow best describes the evolutionary process at work.
Gene migration is another name for gene movement. The transfer of genetic material from one group to another is referred to as gene flow. Through migration, gene flow can occur between two populations of the same species and is mediated via vertical gene transmission from parent to offspring and reproduction. The transfer of genes from one group to another is known as gene flow or gene migration. The interbreeding of Homo sapiens with Neanderthals in Europe, which produced Neanderthal genes in contemporary Europeans, is an illustration of gene flow. Pollination is an example of gene flow in plants. Gene flow, also known as gene migration, is the transfer of genetic material from one population of a species to another by interbreeding, modifying the species' gene pool.learn more about Gene flow here: https://brainly.com/question/2698940
#SPJ4
The tissue found covering body surfaces, lining body cavities, forming the internal and external linings of many organs, and constituting most gland tissue is tissue.
The epithelium is a kind of body tissue that covers all of the internal and exterior body surfaces, lines hollow organs and body cavities, and makes up the majority of glandular tissue.
What kind of tissue is a connective tissue that mostly consists of adipocytes?Adipose tissue is a type of loose connective tissue where fat cells, or adipocytes, predominate. The name "adipose tissue" is often reserved for huge masses (grossly apparent) of these cells because the majority of loose connective tissue contains sporadic clusters of adipocytes.
The four fundamental kinds of tissue are connective, epithelial, muscular, and nervous. Providing a covering is epithelial tissue (skin, the linings of the various passages inside the body).
learn more about adipocytes refer
https://brainly.com/question/3731743
#SPJ4
Never remove chemicals or other equipment from the laboratory ? true or false
Answer:
True.
Explanation:
It's theirs
Synthesizing cell walls with mycolic acids requires a great deal of energy. do you expect acid-fast bacteria to grow fast or slow compared to other bacteria?
They move much more slowly because producing this layer requires a lot of energy, which diverts energy from growth and reproduction.
Mycolic acid synthesis is what?Major and distinct long-chain fatty acids known as mycolic acids are crucial parts of the cell membrane of Mycobacterium TB. They are essential components of mycobacterial pathogenicity and play a critical role in the architecture and impermeability of the cell wall, which contribute to the organisms' inherent resistance to the majority of antibiotics. The eukaryotic-like multifunctional enzyme FAS I and the acyl carrier protein (ACP)-dependent FAS II systems, which are made up of a number of distinct mono-functional proteins and each catalyze one reaction in the route, are needed for the biosynthesis of mycolic acid precursors. The mycobacterial FAS II synthase is unable to produce new medium-chain fatty acids from acetyl-coenzyme A, in contrast to other bacteria's FAS II synthases. Instead, it elongates medium-chain fatty acids that had already been produced by FAS I to form meromycolic acids.Learn more about the mycolic acid with the help of the given link:
https://brainly.com/question/5110275
#SPJ4
What are the differences between the health risks of young men and young women?
WOMEN
similarity between f1 generation and p generation
F1 generation refers to the first filial generation of the offspring from the parents, while F2 generation is the second filial generation of the offspring, generated through the inbreeding of F1 individuals. The F1 generation results from cross-pollination of two-parent (P) plants and contained all purple flowers. The F2 generation results from the self-pollination of F1 plants and contained 75% purple flowers and 25% white flowers. This type of experiment is known as a monohybrid cross.
What is the difference between u.s. customary and metric?
Pelagibacter ubique is a prominent species of bacteria that are free floating in the oceans of the world; as free-floaters they are _________.
Pelagibacter ubique strain HTCC1062 is known to be one of the smallest and simplest self-replicating and free-living cells. It is part of the SAR11 clade, small heterotrophic alphaproteobacterial that constitute approximately 25% of all microbial planktonic cells. During the summer months, up to about 50% of temperate ocean cells can rise (12). P. ubique has a surface coastal ecotype that inhabits nutrient-poor habitats. The first cultured member of the SAR11 group (the most successful group of organisms), P. ubique, has been fully sequenced and has the smallest genome (1,308,759 bp) among free-living organisms and a predicted open reading Minimum number of frames. (ORF) . Unlike bacteria and archaea, which also have small genomes, P. ubique has complete biosynthetic pathways for all 20 amino acids. Also, there are no pseudogenes, introns, transposons, extrachromosomal elements, or inteins . In other words, P. ubique lacks duplicate gene copies, viral genes, and junk DNA . Its genome is about the same size as the intracellular parasites R. conorii and W. pipientis, but its metabolic functions are very simple . The shorter the length of DNA you copy in each generation, the less work you have to do . Although P. ubique microorganisms are numerous in the ocean, mutations have not been an issue due to the fact that they are largely self-sufficient. Research to explain this phenomenon is ongoing.
P. I have a better understanding of ubique. It's a simple microbe, and a sophisticated understanding tells us what it needs for self-cell replication.
P. ubique was first isolated in 2002 by a team at Oregon State University from the surface waters of the Sargasso Sea and Oregon coast, where SAR11 is named. First culture of P. It was ubiquitous with high-throughput dilution-to-extinction (HTC) culture using natural seawater media for dilution. Cultures were grown periodically in autoclaved seawater to reach typical cell densities, approximately 10^6 cells/ml, similar to natural populations. In collaboration with Diversa Corporation, we used liquid chromatography and tandem mass spectrometry to confirm the presence of the proteorhodopsin gene in culture , which was abundant in the Oregon coast. The proteorhodopsin gene is a light-dependent proton pump that provides energy for microbial metabolism.
Learn more about Gene:
https://brainly.com/question/20682055
#SPJ4
what are the seeds of tomatoes usually called
Answer:two Types of seeds:
hybrid and heirloom seeds
Explanation:
Which organelle would play the most direct role in eliminating bacteria engulfed by a phagocytic white blood cell?.
Cells in the body use oxygen for cellular respiration. Select the two sentences that correctly describe cellular respiration.
Cells in the body use oxygen for cellular respiration two sentences that correctly describe cellular respiration: -
ATP is produced
Carbon dioxide is released
The process through which cells transform fuel into energy and nutrition is known as cellular respiration. Cells need fuel and an electron acceptor to power the chemical process that converts the energy from the fuel into a form that can be used by the cell, such as ATP and other kinds of energy.Alternative names include tissue respiration and cellular respiration. Through the process of cellular respiration, organisms mix oxygen with food molecules, directing the chemical energy contained in these substances toward life-sustaining processes while excreting carbon dioxide and water as waste.To know more about cellular respiration, visit:
https://brainly.com/question/13721588
#SPJ1
Which restriction endonucleuses would cleave a dna molecule at the given sequences?
(a) HindIII and (b) EcoRI, HaeIII are the restriction endonucleuses that would cleave a DNA molecule at the given sequences.
Bacterial restriction endonucleases (REs) cleave double-stranded DNA. Type I REs are crucial for the operation of bacteria but do not break DNA at certain locations. The Type II REs described for usage in this handbook are incredibly helpful tools in molecular biology because they need very particular locations for DNA cleavage.
These enzymes enable the purification and cloning of specific DNA segments. The majority of the 500 or so known REs were identified from various bacterial strains.
Attached are the question correction with the complete and necessary data for the answer and the solution for the answer which is (a) HindIII and (b) EcoRI, HaeIII.
Here is another question with an answer similar to this about citric acid cycle: https://brainly.com/question/11459709
#SPJ4
True or false: electrolytes move freely across the cell membrane, whereas water requires a special channel or protein.
False. Electrolytes and water cannot move across the cell membrane freely. They always need a channel.
Electrolytes and water move across the cell membrane only through the protein channels.
In the cell, if there is a high concentration of electrolytes, then the fluids start moving into the compartments. This process is called osmosis.
However, if the concentration of electrolytes is low, the fluids start moving out to adjust the balance.
Facilitated diffusion occurs happens with the help of protein-based channels.
These protein channels allow the passage of fluids and salutes along the concentration gradient.
These protein channels have special gates which open and close as per concentration gradient.
If you need to learn more about electrolytes, click here:
https://brainly.com/question/13601504
#SPJ4
Can you identify blood vessels coursing through the stratified squamous epithelium in either slide?.
Yes, we can identify blood vessels coursing through the stratified squamous epithelium in slide.
The lining of the blood vessel is formed by simple squamous epithelium, which is single-layer flattened cells that line the interior of vessels has a special name , endothelium
Histologically, blood vessels consist of concentric layers or "tunics" of different types of tissue .
The tunica intima is the innermost layer, consisting of endothelium and a relatively thin layer of supporting connective tissue. The tunica media is the middle muscular and/or elastic layer, containing smooth muscle and elastic tissue .The tunica adventitia is the outermost , fibrous connective tissue layer.Epithelial tissues do not contain any blood vessel and are avascular. Connective tissues are highly vascular and so the nearby connective tissue provides essential nutrients (from the blood) to the epithelial tissue.
learn more about blood vessel histology here-
https://brainly.com/question/15395381
#SPJ4
When a big fish swims into an oncoming smaller fish and swallows it, the momentum of the two-fish system _______.
When a large fish swims into and swallows a smaller fish, this same momentum of something like the two-fish system is increased. Nothing has changed.
What is meant by Momentum?Momentum is defined as the product of a particle's mass and velocity. Momentum is an vector quantity, meaning means that it has both a magnitude and a direction.. According to Isaac Newton's second equation of motion, the time rate at which the momentum changes equals the force applied on the particle. Look up Newton's laws of motion.
What is the significance of momentum?Momentum in Physics is significant because that describes the link between speed, mass, and direction. It also describes overall force required to stop and keep items moving. If an object seems to have enough momentum, it really can exert considerable force.
To know more about Momentum visit:
https://brainly.com/question/24030570
#SPJ4
A measure of the ability of a drug, once bound to the receptor, to produce a measurable physiologic effect is know as:________
A measure of the ability of a drug, once bound to the receptor, to produce a measurable physiologic effect is know as: intrinsic activity.
A drug's physiologic processes are affected by two factors, which are affinity and intrinsic activity:
A drug's affinity is a measurement of how tightly it binds to a receptor.The ability of a medication to produce an impact activating stimuli and alter cellular activity after binding to a receptor is measured by its intrinsic activity.Drugs can differ in their affinity and intrinsic activity. Agonists have intrinsic activity, which is the capacity to have a measurable impact, as well as affinity, which is the capacity to bind to the receptor. Conversely, antagonists only have affinity for the receptor. Antagonists can attach to the receptor because of this characteristic.
Here is another question with an answer similar to this about physiologic processes: https://brainly.com/question/16984912
#SPJ4
What other molecules would you have to add to the test tube in order for the ribosomes to make polypeptides?
Other molecules to be added in test tube are amino acids, mRNAs, tRNAs, amino acyl-tRNA synthetases, and a source of ATP. A molecule is two or more atoms linked together by chemical bonds that form the smallest unit of a substance that retains its composition and properties.
What you know about ribosomes?A ribosome is a micro-machine that produces proteins. Ribosomes are made up of unique proteins and nucleic acids. The TRANSLATION OF INFORMATION and AMINO ACIDS LINKING are central to the protein production process. A ribosome is a small organelle that is involved in the process of producing protein, which is known as protein synthesis. The ribosome is in charge of translation, which is the second step in protein synthesis. Ribosomes can be found freely floating in the cytoplasm or attached to rough endoplasmic reticulum. The nucleolus is a spherical structure found in the nucleus of cells that produces and assembles the cell's ribosomes.Ribosomal RNA genes are also transcribed in the nucleolus.To know more about ribosomes refer to:
https://brainly.com/question/8773679
#SPJ4
Which best describes how winds in the jet stream blow?
Answer: The winds blow from west to east
Explanation: Jet streams are relatively narrow bands of strong wind in the upper levels of the atmosphere. The flow often shifts to the north and south. Jet streams follow the boundaries between hot and cold air.
Which tree species are shade-tolerant and considered competitors in their respective ecosystems?
From northern to southern geographic regions, trees have different tolerances for shade, such as sugar maple and ash in the eastern United States.
When young, most maples, oaks, and eastern white pines can tolerate greater shade, but as they get older, they become less tolerant.
Shade toleranceShade tolerance refers to a tree species' capacity to establish itself, develop, and survive in conditions of low light intensity, duration, and quality. When there is little light available, tolerant plants can thrive relatively well. Intolerant species cannot thrive in low light conditions, but thrive in conditions that are nearly as bright as full sunshine. Other species are more adaptable and are viewed as being more intermediate between environments with greater shade and full sunlight. Tolerant trees proliferate in forests and create understories beneath the canopies of more tolerant trees or even in their own shadow. Only in the open or in areas with significant canopy gaps can intolerant trees effectively propagate.Hence, sugar maple and ash are two examples of shade tolerant species.
Learn more about shade tolerance here:
https://brainly.com/question/3501149
#SPJ4
suppose you have a sample of a material that has a mass of 340.2 g and a volume of 30.0 mL what is the density of the material
Answer:
you have to divide the mass and the volume, thanks!
Explanation:
What pattern do you detect between the water temperature and the growth of the
organisms?
The aquatic life in a stream can be impacted by warm stream water. Different forms of aquatic life may not be able to survive in warm water because it contains less dissolved oxygen than cool water.
What is relation between temperature and organism?Because temperature affects the physical state of water, it has the greatest impact on how organisms are distributed.
Most organisms cannot survive in environments where the temperature is consistently below 0 °C or above 45 °C.
At warmer temperatures, some chemicals become more harmful to aquatic life.
Therefore, water temperature alter the growth of organism.
Learn more about water temperature here:
https://brainly.com/question/16734603
#SPJ1
Which units are used in a pyramid of numbers?
A.) m/s2
B.) Kilocalories
C.) g C/m2
D.) Individuals
Subject is environmental science
The unit used in a pyramid of number is (d) individuals.
Pyramid of number is a type of graphical representation that shows how many number of organisms are present in each trophic level. This pyramid cannot have a constant shape as the the population of each species belonging to a specific trophic level changes from one ecosystem to another. Hence the pyramid can be of three types bases on shape: upright, inverted or partly upright.
Individual is one single organism of any species. Since the pyramid of number counts the total number of organisms in each trophic level, therefore individual is the correct unit for it.
To know more about pyramid of number, here
brainly.com/question/1217901
#SPJ1
