It was frequently employed in the 1950s and 1960s to get rid of insects that ate crops.
Briefing:However, DDT was essentially outlawed in the United States in 1972 after researchers found that birds like the peregrine falcon and bald eagle were eating the pesticide and were unable to hatch offspring due to eggshell weakening.
Is peregrine falcon the fastest animal?The peregrine falcon, the fastest bird and fastest animal in the world, is best renowned for its diving speed when flying, which may reach more than 300 km/h (186 mph). The underparts are white to yellowish white, with black bands on the bluish gray upper parts of the bird.
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posttranslational alterations of proteins do not include the cleavage of signal sequences. do not include the addition of polysaccharides to proteins. do not affect the activity of an enzyme. may include the addition of polysaccharides to proteins. do not include the addition of phosphate groups.
The posttranslational alterations of proteins may include the addition of polysaccharides to proteins (Option 4).
What are posttranslational alterations of proteins?The posttranslational alterations of proteins are different modifications in the protein sequences in order to activate their functions and or suppress them.
One of the most common posttranslational alterations of proteins is phosphorylation, which occurs at specific amino acid residues and it is able to activate or deactivate proteins in order to change the signaling pathway associated with their functions. Polysaccharides can also be added to proteins in order to change their functional states.
Therefore, with this data, we can see that the posttranslational alterations of proteins are able to modify the functional properties of a protein and polysaccharide addition in one of these types of modifications that both structural proteins and enzymes suffer to activate an or deactivate them.
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one way to clone an organism is to transfer the nucleus of a cell taken from animal a, place it into an egg from animal b whose nucleus has been removed, and then implant it into a surrogate mother, animal c. the cloned animal would be identical to
As the nucleus was taken from cell a, the animal would be identical to animal a.
The nucleus is the structure of a cell in which chromosomes are present. The chromosomes contain the genetic material called DNA. The genetic material is what makes all of the traits of an organism.
In the case above, the nucleus of a cell from animal A was taken. Hence, no matter in which egg you place it and implant the egg for surrogacy, the offspring born will be identical to animal A.
The nucleus of a cell represents the entire karyotype of that organism. Hence, the cloned animal produced in the above case will be identical to animal A.
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Use a real life example on why competition has a negative effect on population numbers
Answer:
why is this even a question? are u trying to commit a genocide?
Explanation:
Basically competition is a conflict, conflict is a strife, strife is deadly, deadly is also death meaning competition is lowering our population by squashing fat men and women. loose weight
Choose a call sign, broadcast frequency (has
to be AM), and listening area for a campus
radio station based on your research.
Amplitude modulation, or AM for short, refers to a technique for encoding the audio signal on the carrier frequency. AM radio stations are referred to as "mediumwave" stations in various nations.
What is AM broadcasting?AM broadcasting, or radio broadcasting, uses amplitude modulation (AM) transmissions. It is still in use today all over the world, especially for medium wave transmissions (also known as the "AM band") but also on the longwave and shortwave radio bands. It was the first method for creating audio radio transmissions.Using frequency modulation, FM broadcasting is a type of radio transmission (FM). Wide-band FM, developed by American engineer Edwin Armstrong in 1933, is utilized all over the world to deliver high-fidelity sound over broadcast radio. Compared to other broadcasting methods, such as AM broadcasting, FM broadcasting has a higher fidelity—that is, a more accurate reproduction of the original program sound.Amplitude modulation, or AM for short, refers to a technique for encoding the audio signal on the carrier frequency. AM radio stations are referred to as "mediumwave" stations in various nations. Because AM was the first format to be utilized to broadcast radio signals to the general public, they are also frequently referred to as "standard broadcast stations." Due to "skywave" propagation, which happens when the AM signal is bounced off the ionosphere and back to the ground, many AM stations are either daytime-only stations or stations authorized to run at very low power levels at night.Therefore, amplitude modulation, or AM for short, refers to a technique for encoding the audio signal on the carrier frequency. AM radio stations are referred to as "mediumwave" stations in various nations.
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Triglycerides are the most common lipid found in food and in the body; they consist of a ____________ backbone attached to three fatty acids.
Triglycerides are the most common lipid found in food and in the body, they consist of a glycerol backbone attached to three fatty acids.
Triglycerides are lipid compounds consisting of glycerol esterified with three fatty acid chains of varying lengths and compositions. Triglycerides are a type of fat found in the blood. When you eat, your body converts calories that it doesn't need to use immediately into triglycerides. Triglycerides are stored in fat cells.
The hormone then releases triglycerides for energy between meals. Triglycerides are the major components of body and vegetable fats in humans and other vertebrates. They are also present in the blood, allowing the bidirectional movement of fat and blood sugar from the liver, and are the major constituents of human skin oils. Triglycerides or triacylglycerols are glycerol molecules with three fatty acids attached. It consists of Pendant fatty acids that can be saturated and trans.
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how can we improve human dietary habits using anaerobic respiration
Answer: Anaerobic metabolism uses glucose as its only source of fuel and produces pyruvate and lactic acid. Pyruvate can then be used as fuel for aerobic metabolism.
Explanation:
What will happen to the red blood cells in a hypertonic solution?Swelling and eventual crenationShriveling while maintaining the volume of cytoplasm.No net movement or shape change to the cells.© The red blood cells will experience crenation.
In an hypertonic solution, red cells would experiment loss of water, which translates into reduction of the volume of the cytosol, and eventually crenation, which means the destruction of the cell by dehydration (D).
How do you describe a sandstone with trilobite?
A sandstone with trilobite provides information about a variety of things like dating of the sandstone, how the earth evolved and trace fossils.
Sandstone is the sedimentary rock that is very useful as it is the reservoir for petroleum and water. It contains a lot of minerals and the rock itself is used in constructions, statues, etc.
Trilobite are the marine arthropods that are now extinct. It serves as a trace fossil that provides information about the biological activities of the extinct organism. This is how evolution of the earth can be known. This biological activity also helps in dating process.
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Which of the following is an example of a physical property? a Melting and boiling points b color c Ability to conduct electricity d All of the above
Answer:
all above.
Explanation:
I had the same question for k12.
what is the typical lifespan of a leukocyte? question 20 options: because all leukocytes are unable to undergo mitosis (cell division), their lifespan is usually only a few seconds. the lifespan of a leukocyte is approximately 120-150 days. the lifespan of a leukocyte typically is measured only in hours or days. the lifespan of a leukocyte is extremely variable, measuring in hours to years or decades. many leukocytes can live indefinitely if they are in well-protected locations.
The lifespan of leukocytes is 13-20 days, hence option 3 is correct, A leukocyte's lifespan is typically measured in hours or days.
There are three main categories of blood cells: erythrocytes (RBC), leucocytes (WBC), and platelets. Due to their lack of hemoglobin, leucocytes are also known as white blood cells (WBC). A healthy adult man has between 6000 and 8000 WBCs per milliliter of blood.
These are the immune system's cells . They shield the body from both pathogens and foreign invaders. Your body produces more white blood cells when you get sick to fight the germs, viruses, or other foreign substances that are causing your illness. Your white blood cell count rises as a result. Compared to RBCs, which have a lifespan of 120 days, WBCs only live for 13 to 20 days.
White blood cells are classified into five main categories: Lymphocytes, neutrophils, monocytes, eosinophils, and basophils.
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corals host dinoflagellate symbionts called , which, when expelled, result in coral bleaching. because neither the coral nor its symbiont can survive alone, this relationship is called
Corals host dinoflagellate symbionts called expelled, result in coral bleaching because neither the coral nor its symbiont can survive alone, this relationship is called dinoflagellates provide nutrients from the products of photosynthesis which are essential for zooxanthellae survival.
What is endosymbiotic dinoflagellates?The endosymbiotic dinoflagellates are found in the bodies of corals. These endosymbiotic dinoflagellates are called zooxanthellae and are immobile. Being autotrophic, zooxanthellae carry out photosynthesis to produce the organic food required for corals.
Death of endosymbiotic dinoflagellates deprives the coral of organic nutrients leading to their death. This is why the endosymbiotic dinoflagellates are required for survival and productivity of coral reefs.
Therefore, Corals host dinoflagellate symbionts called expelled, result in coral bleaching because neither the coral nor its symbiont can survive alone, this relationship is called dinoflagellates provide nutrients from the products of photosynthesis which are essential for zooxanthellae survival.
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Which term describes the process by which light passes through an object or a medium?
reflection
reflection
refraction
refraction
absorption
absorption
transmission
Answer: Transmission
Explanation:
Reflection obviously describes the way light bounces back at the viewer.
Refraction describes how light is passed through an object but changes directions.
Absorption describes how much light is absorbed when passing through an object.
Transmission describes the amount of light that passes through an object or medium.
(Absorption and Transmission are generally associated with spectrophotometry)
Answer:
Transmission
Explanation:
The transmission of light occurs when light passes through an object or a medium.
Select the correct order of the final three stades in the lytic cycle
The correct order of the final three stages in the lytic cycle is Assembly > Transduction > Release
What is a Lytic cycle ?One of the two viral reproduction cycles, the other being the lysogenic cycle, is the lytic cycle. The infected cell and its membrane are destroyed as a result of the lytic cycle. Virulent phages are bacteriophages that only utilise the lytic cycle.
Although the lytic cycle's final result is the generation of new phage offspring and the death of the host bacterial cell, this is a multistep process that requires careful synchronisation of physical processes and gene transcription.The primary distinction between the lytic and lysogenic cycles is that the lytic cycle kills the host cell, but the lysogenic cycle does not. The host cell's DNA is destroyed by viral DNA, which also halts the cell's lytic cycle.Learn more about Lytic cycle here:
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Many people try to eliminate fat from their diets. Which is one reason it is
necessary for humans to eat fat?
Fats are carbohydrates, which give the body energy. They also protect the organs and keep the body warm :)
A cell in the liver begins to divide abnormally. It forms a mass, but then stops dividing. No cells from the mass move into other tissues.
How would you describe this mass?
Group of answer choices
A) It is a benign tumor.
B) It is a secondary tumor.
C) It is a malignant tumor.
D) It is a metastatic tumor.
You describe this mass by the fact that it is a benign tumor. Thus, the correct option for this question is A.
What is a Benign tumor?A Benign tumor may be defined as a type of tumor that is non-cancerous in nature. This type of tumor does not express metastasis and is mostly non-invasive in nature. Benign tumors stop growth after reaching a certain size. These tumors are less fatal to the body.
It is clearly mentioned in the question that it forms a mass but stops dividing after a certain period of time. Hence it is not a secondary or malignant tumor that shows indefinite growth. It also mentioned that no cells from the mass move into other tissues. Hence it is not a metastatic tumor.
Therefore, you describe this mass by the fact that it is a benign tumor. Thus, the correct option for this question is A.
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Dermal papillae are numerous in palmar and plantar skin but few in number in the skin of the face and abdomen. What do you think is the functional significance of this difference?.
Dermal papillae help strengthen the connection between the dermis and epidermis and help prevent friction-related damage in high-use areas.
Dermal papillae are found in the papillary layer of the dermis. Two layers make up the dermis, which is located underneath the epidermis' malpighian layer. The dermal papillae, which resemble finger-like projections and extend into the epidermis, are part of the papillary layer, a thin outer layer of alveolar connective tissue. Numerous nerve endings, lymphatic veins, blood vessels, and hair follicles may be found in the dermis. Mesenchymal cells make up the dermal papilla in the hair follicle, which is primarily responsible for controlling hair development. The key to in vitro hair follicle formation and regeneration is maintaining the dermal sheath cells' and DPCs' potential hair inductivity throughout cell culture.
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the presence of a full bladder triggers the bladder to contract. as a little urine is released, this causes more contractions, which will completely empty the bladder. this is an example of
The event where the presence of a full bladder triggers the bladder to contract, as a little urine is released, this causes more contractions, which will completely empty the bladder, is an example of Positive feedback.
In the field of biology, positive feedback can be described as a condition in which a product that is produced through a series of events causes more of the reaction to take place. A positive feedback can be described as a kind of feedback that causes the occurrence of a positive action or action that is helpful for the body.
In the case above, the release of little urine acts as a trigger to continue the events to form more urine. Hence, this action is an example of positive feedback.
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Two mechanisms that affect the genetic diveristy of bacterial population
Horizontal gene transfer involves several mechanisms that can increase the genetic diversity of bacterial populations.
One of these mechanisms is bacterial conjugation in which a donor cell transfers genetic material to a recipient cell through a pili which function as a conduit.
Another mechanism of variability is through bacteriophages where genetic material is moved from one bacterium to another, this method is called transduction.
a phagehunter plates 4000 phage particles onto a pyca plate with gordonia terrae. the burst size of the phage is 50 phage particles per round of replication. after one round of replication, how many phage particles are present on this plate?
The number of phage particles present on this plate is 50 Million phages.
When a plague started with one phage, after 1st round of replication it will produce 10 virus particles. After another round, each of the 10 viruses will produce 10 virus particles each, totaling 100 particles. And then after 3rd round, each of the 100 phages will produce 10 each = 1000 phages. So, (10)^3
Initially, 400 phages are present, and the burst size is 50., After 3 rounds, the number of phages will be = 400× (50)^3
= 50 Million phages.
DNA replication is the procedure via which a double-stranded DNA molecule is copied to provide identical DNA molecules. Replication is an essential method because, each time a mobile divides, the two new daughter cells must comprise the same genetic information, or DNA, as the discern cell.
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Remembering that proteins are made in cells that are 70% water- and water is polar-
describe how you might imagine that a protein spontaneously folds up into a complex 3D
shape.
A protein can spontaneously folds up into a complex tridimensional 3D shape by inducing polar domain groups to outside the molecule and hydrophobic domains the inside, which allows forming stable bonds with surrounding water molecules.
What is protein folding?Protein folding is the process for which a protein adopts its final 3D shape, which is fundamental for its function and to form chemical bonds with the surrounding aqueous environment. During folding, protein hydrophobic domains are generally located inside the molecule in order to avoid the repulsion of charges, while polar groups such as R-charged groups are located outside.
Therefore, with this data, we can see that protein folding is fundamental and polar domains are generally located outside the molecule.
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Will selection eliminate a harmful recessive allele from a population as quickly as it will remove a harmful dominant allele? Why or why not?
Answer:
no
Explanation:
you can see dominant traits on every organism that can have them, meanwhile you can have carriers for recessive traits, so there can be hidden traits, thus it will take
suppose a box of cracker jacks contains one of 5 toy prizes: a small rubber ball, a whistle, a captain america decoder ring, a race car, or a magnifying glass. each prize is equally likely to be in a box. question 1. how many boxes of cracker jacks would you expect to buy until you obtain a complete set of prizes? many human skin tumors contain mutated p53 genes that probably result from excess uv exposure. one of 10 different equally likely mutations of the p53 gene always results from a single episode of excessive uv exposure; the 10 mutations remain equally likely over repeated exposures. a p53 gene must experience all 10 mutations before a tumor can develop. assume that only one mutation can occur as a result of one excessive uv skin exposure. question 2. how many excessive uv exposures would you expect are required until the p53 gene has experienced all 10 mutations?
Most malignancies include somatic TP53 mutations, which range in prevalence from 38%–50% in some cancers (such as ovarian, colorectal, head and neck, throat, and lung) to roughly 5% in others (such as primary leukaemia, sarcoma, testicular cancer, malignant melanoma, and cervical cancer).
What illness exhibits p53 mutations most frequently?The p53 tumour suppressor gene (TP53) is altered in human tumours more frequently than any other gene. Importantly, it is commonly mutated in common human cancers like glioblastomas, as well as less frequently in other serious human cancers including breast and colorectal cancers.
P53 is often altered in solid tumours; in fact, somatic p53 (TP53) gene alterations have been found in more than 50% of all human cancers. Several intracellular processes involved in cell survival, DNA repair, apoptosis, and senescence can be controlled by the transcription factor P53.
P53 inhibition boosts proliferation in healthy cells but slows it down in malignant cells.
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Cellular respiration is a series of metabolic reactions in which the energy from organic molecules, such as glucose, is released and used to synthesize.
Cellular respiration is a series of metabolic reactions in which the energy from organic molecules, such as glucose, is released and used to synthesize energy in the form of ATP.
The chemical reaction that converts glucose and oxygen into water, carbon dioxide, and ATP energy is known as cellular respiration. Oxygen and glucose are the reactants in the process, and the products are water, carbon dioxide, and energy (ATP). Therefore, we can say that cellular respiration is a series of metabolic reactions that is used to synthesize ATP.
The controlled release of energy from organic substances during cell respiration results in the production of ATP. ATP, adenosine triphosphate, is required in every kind of bodily reactions and to conduct various body functions. Mitochondria is the primary site of ATP synthesis in a cell. These organelles consume glucose to convert it into energy molecules and other by-products.
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according to the triangle of plant life history strategies suggested by grime et al. (1979), what category of plant would you expect to exhibit fast growth and early maturation and to expend a large amount of energy producing seeds?
Triangle of plant life history strategies by grime et al. (1979), a garden weeds category of plants expect to exhibit fast growth and early maturation and to expend a large amount of energy producing seeds.
Plants that are growing in your garden against your wishes are known as garden weeds. Any plant species has the potential to become a weed, however some species are more frequent in New England gardens than others. And to say that it is common in some gardens would be an understatement. Weeds can provide essential ecosystem services like defending and repairing exposed or deteriorated soils. Additionally, some weeds act as habitat for beneficial creatures, which makes a substantial contribution to the natural and biological management of various insect pests. Some weeds can be used to make nourishing food or fodder. Weed seeds are abundant, come from many different places, and have the capacity to remain dormant in the soil for long periods of time before germination. Weeds release hundreds of seeds per plant while they are in active growth, dispersing them.
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How is the geologic time scale related to the fossil record?
answer: The periods of the time scale were constructed based on ranges of fossil organisms.
Geologic time scale related to the fossil record with the timing of the emergence and disappearance of widespread species from the being used to delineate the beginnings and endings of ages, epochs, periods, and other intervals.
Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events.
The geological time scale is based on the the geological rock record, which includes erosion, mountain building and other geological events. Sediment has to cover an organism's remains in order for the long fossilization process to begin. Most organisms decompose before this can happen.
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What is a trade-off?
a new scientific discovery that benefits the environment
something you sacrifice in order to gain something else
a technological advance that makes life easier
The correct statement is (c) something you sacrifice in order to gain something else.
What is a trade-off ?A trade-off refers to decision making that involves sacrificing or decreasing in quality or quantity of one set of property or ideas in terms of gaining or increasing in another set of property or ideas.
In simple words, a tradeoff is a situational decision of choosing one thing on the cost of another. Sometime it is also called as compromise.
Thus, from above the correct explanation to trade-off is represented by the statement (c) something you sacrifice in order to gain something else.
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Which structure would not be found in a prokaryotic cell?
O cell wall
O cell membrane
O cytoplasm
O nucleus
Answer: Nucleus as prokaryotes don't have their DNA enclosed in the nucleus unlike eukaroytes. They contain a single loop of dna and have no Nucleus
Answer:
Nucleus
Explanation:
Prokaryotic cells have a capsule, ribosomes, DNA, cell wall, Plasma membrane, and cytoplasm. However, A nucleus is only present in eukaryotic cells.
Enzymes are proteins that facilitate chemical reactions. Based on your knowledge of enzymes, what might the result be if one particular enzyme malfunctioned or was not present?
Answer: Enzymes are proteins that facilitate chemical reactions. Based on your knowledge of enzymes, what might the result be if one particular enzyme malfunctioned ...
Explanation:
Why is it important to base scientific theory and models on empirical evidence
Answer: Empirical evidence is any information you can collect through the processes of observation, experimentation or the use of human senses. Acquiring empirical evidence is a vital step in the scientific method, as it gives researchers the opportunity to collect, organize and study any data that results from their work.
How can we explain the fact that millions of kids watch violent TV shows and remain nonviolent? If there is a TV–violence link, how can we explain the fact that violence rates may have been higher in the Old West than they are today? Do you think kids in violent gangs stay home and watch TV shows?
Kids are most vulnerable to the examples they receive from their immediate caretakers (example, parents, tutors, etc.) Their immediate environment plays a more deterministic role in their behaviour than their hobbies. For example, if a kid is raised in a lovely and supporting family he/she could engage in violent videogames for fun, and not for rehearsal issues (thinking he/she is actually killing). So the early history (wether he suffer any kind of physical/psychological abuse) and the kind of family (wether they are supportive or punitive) plays a critical role in supporting previolent behaviours that videogames or other stuff migth help to develop later on.