The differences between teosinte and maize are thought to be the result of just 4 or 5 genes, according to George Beadle's breeding experiments.
It's regulatory genes (genes that regulate the activity of hundreds of other genes by turning them on or off). This implies that rather than only altering one or two items, they would bring about significant alterations.
This is what leads to the stark variation in phenotype that results from a minor alteration in genotype. Dr. Beadle's research focuses on minimally invasive laparoscopic surgery, infertility, tubal reversal surgery, endometriosis therapy, and urine incontinence management.
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M protein, hyaluronidase, collagenase, and often a capsule, can be virulence factors for certain pathogenic strains of:
a.Mycobacterium
b.Streptococcus
c.Neisseria
d.Staphylococcus
e.Yersinia
M protein, hyaluronidase, collagenase, and often a capsule, can be virulence factors for certain pathogenic strains of Streptococcus. Correct answer: letter B.
This is because they allow bacteria to adhere to and penetrate the host's tissues, as well as help evade the host's immune response. While hyaluronidase, collagenase and capsule are components of the bacterial cell wall.
What is streptococcus bacteria?Streptococcus is a genus of bacteria that includes several species commonly found in the human body. These bacteria are spherical or ovoid in shape, and typically grow in chains or pairs. Many species of Streptococcus cause diseases in humans, including:
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water takes up ______ space as a liquid than it does as solid
Water takes less space as a liquid than it does as solid. As a solid, water has more volume than as a liquid. The water molecules in the solid are an open cage-like form by the hydrogen bonds in the water.
Which occupies more room, a solid or a liquid?With the exception of water, most liquids contain particles that are larger while they are liquid than when they are solid. Liquids allow their constituent particles to move and slide past one another.
What is the name for both solid and liquid?The term "non-Newtonian fluids" applies to them. The amusing name of this material derives from the Dr. Seuss novel Bartholomew and the Oobleck.
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these factors are directly responsible for the survival of a organism. they include water, shelter, space, and food and can all run out if being used by too many individuals.
Limiting factors, These elements directly contribute to an organism's ability to survive. They include food, water, shelter, and space, all of which can run out if they are used by too many people.
What is meant by the variables that affect an organism's capacity for survival, adaptation, and reproduction?While fitness refers to the ability to withstand (only the fitness organisms) all environmental conditions in order to survive and reproduce, it is also known as survival of the fittest. Adaptation is the process by which living organisms adapt themselves to live and reproduce in all environmental conditions.
What are the elements that can sustain an organism's needs?The factors of space, food, oxygen, and water are restrictions. The climate of an ecosystem is influenced by temperature and precipitation, which has an effect on the kind of creatures that may survive there. A population cannot be supported indefinitely by an ecology.
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Structure A refers to the _____.
chromarid
centromere
chromosome
these heterozygous parents having the genotype ttyy will produce how many gametes and what are the genotypes of these gametes?
Since genotype TtYy is heterozygous for two genes i.e. it has both dominant and recessive alleles of two genes, it will form total four types of gametes.
The presence of two different alleles at a particular gene locus. A heterozygous genotype may include one normal allele and one mutated allele or two different mutated alleles (compound heterozygote).
People with genotypes AA and aa are homozygotes, which means they have two copies of the same allele. Individuals with genotype Aa have two different alleles at the A locus, i.e., they have two different alleles at the A locus.
You have a heterozygous genotype for that gene if the two versions differ. Being heterozygous for hair color, for example, means you have one allele for red hair and one allele for brown hair. The interaction of the two alleles influences which traits are expressed.
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a 5-year old dog weighing 30lb presents for urinary problems. the urine output for this animal is 625ml of urine in a 24 hours period. which term properly identifies this situation?
A 30-pound 5-year-old dog appears with bladder difficulties. This animal's pee output during a 24-hour period is 625ml. The correct term for this situation is oliguria.
Oliguria is described as having a urinary output of less than 400 ml per day or less than 20 ml per hour, and it is one of the first indicators of compromised renal function.
It was mentioned early in the literature when Hippocrates recognized the predictive significance of urine flow.
Oliguria is defined as a urine output of less than 1 mL/kg/h in babies, less than 0.5 mL/kg/h in children, and less than 400 mL or 500 mL per 24 hours in adults (equivalent to 17 or 21 mL/hour). For an adult weighing 70 kg, this equates to 0.24 or 0.3 mL/hour/kg. However, the value of 0.5 mL/kg/h is also often used to characterize oliguria in adults.
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when does the loss of an immune-system gene associated with an inherited immunodeficiency disease usually not pose a serious consequence?
It won’t have an effect if a compensatory function is provided by another member of the multigene family.
What do you mean by Immune system gene?
The immune system is a sophisticated and complex mechanism, but its goal is to find and eliminate invaders. A person's mortality from an infection by a virus, bacteria, fungus, or parasite will happen if they were born with a seriously compromised immune system. Lack of an enzyme causes toxic waste to accumulate inside immune system cells in severe combined immunodeficiency, killing them and severely weakening the immune system.Hence, in any e.disorder or disease if the gene is missing which is the ultimate cause of that particular disease, then the compensatory function must be provided by the other member of the same family of gene to not to pose any serious consequenc
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the factor required for growth of a plant or phytoplankton that is available in the least supply is defined as
The factor required for growth of a plant or phytoplankton that is available in the least supply is defined as Limiting factor.
The foundation of the marine food chain, phytoplankton fix over 50 Pg of carbon annually, or about half of the world's CO2 emissions. As a result, these tiny, photosynthetic creatures play a crucial role in regulating the amount of CO2 in the atmosphere and the climate of Earth. Due to phytoplankton's need on sunlight, its ability to repair CO2 is only possible in the upper, sunlit surface of the ocean (that is, the euphotic zone). Due to the high concentration of CO2 in saltwater, phytoplankton development is typically not restricted. Inorganic nutrients including inorganic nitrogen, phosphorus, iron, and/or silica, which are essential for primary production in the ocean, are, however, deficient in the great majority of the surface waters.
Growth of phytoplankton is primarily maintained by nutrient recycling or by the mixing-in of nutrients from deeper waters. However, only a small portion of primary production is supported by "external" or "new" nutrients, and it is the amount of carbon that can be permanently stored in the deep ocean as a result of these nutrients.
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the pulmonary artery, which connects the heart to the lungs, is 8.5 cm long and has a pressure
The Pulmonary artery, which connects the lungs to the heart, is 8.5cm long and has a pressure difference over this length of 450 Pa.
A pulmonary artery is a pulmonary circulation artery that transports deoxygenated blood from the right side of the heart to the lungs. The major pulmonary artery or pulmonary trunk from the heart is the biggest, and the smallest are the arterioles that go to the capillaries that surround the pulmonary alveoli.
The pulmonary arteries are blood vessels that transport venous blood from the right ventricle of the heart to the pulmonary microcirculation. In contrast to other organs where arteries deliver oxygenated blood, the blood delivered by the pulmonary arteries is deoxygenated since it is venous blood returning to the heart. The primary pulmonary arteries arise from the right side of the heart and then divide into smaller arteries that gradually divide and form arterioles before narrowing into the capillary microcirculation of the lungs, where gas exchange takes place.
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phase of mitosis in which the chromosomes separate and move to opposite ends of the cell
How are meiosis and mitosis different?
A. Only mitosis produces haploid cells from diploid cells.
B. Mitosis has two rounds of nuclear division, but meiosis has only one.
C. Meiosis results in four cells, but mitosis results in two cells.
D. Chromatids form only during the process of meiosis.
Answer:
C. Meiosis results in four cells, but mitosis results in two cells.
Explanation:
Mitosis is a process where a single cell divides into two identical daughter cells (cell division), whereas meiosis is a process where a single cell divides twice to produce four cells containing half the original amount of genetic information.
tissue detects stimuli, transmits information in the form of electrical signals throughout the body, and interprets the information.
Nervous tissue is the answer. The nervous tissue picks up sensations, sends information throughout the body via electrical signals, and interprets that information.
Nerves, the spinal cord, and the brain all include nervous tissue. Your nervous system's neurons are the cells that send and relay impulses using both electrical and chemical signals. The primary component of each neuron is called the cell body. Excitable and able to transmit and receive electrochemical signals that convey information to the body, nervous tissue is described as such. The neuron and the neuroglia are the two basic groups of cells that make up nervous tissue.
Thus, we might conclude that the nervous tissue is the answer. The nervous tissue detects sensations, transmits information via electrical signals throughout the body, and interprets that information.
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rank these events in the order in which they occur in the heart, beginning with the p wave.
The order of the events in ECG is P wave, atrial contraction, QRS complex, ventricular contraction, t wave, ventricular relaxation.
This is an illustration of the heartbeat waves seen during an ECG. The sequence is as follows:
The first wave to be recognized, the P wave, is connected to both right and left atrial depolarization and atrial contraction.Atrial contraction (systole).The complex QRS is The second wave, which is connected to both the right and left ventricular depolarization, appears to be visible.contraction of the ventricles.T wave – represents rapid phase 3 current when ventricular repolarization takes place.Ventricular unwind (diastole) What is ECG?The procedure of electrocardiography(ECG) involves creating an electrocardiogram, a recording of the electrical activity of the heart. It is a heart electrogram, which uses electrodes applied to the skin to create a graph of voltage vs time for the electrical activity of the heart.
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Complete Question:
Rank these events in the order in which they occur in the heart, beginning with the p wave.
t wave, atrial contraction, ventricular contraction, QRS complex, P wave, ventricular relaxation.
Rank from earliest to latest. To rank items as equivalent, overlap them.
you perform an experiment by incubating a radiolabeled nucleotide into the medium of a culture of cells. the cells that take up the radiolabel would be expected to be in what phase of the cell cycle?
Cells are now actively replicating, and the radiolabeled nucleotide is integrated into newly formed DNA during this stage.
The nuclear DNA is duplicated while the cell grows during interphase. The mitotic phase comes after interphase.
The duplicated chromosomes are separated and distributed across daughter nuclei during the mitotic phase. Typically, the cytoplasm is also divided, giving rise to two daughter cells. The nuclear membrane vanishes, the nucleolus vanishes, the mitotic spindle forms, and chromosomes become visible.
The centromere, a constrictive area of the chromosome, is where the two "sister" chromatids are linked. Spindle fibers that are attached to the centromere pull the sister chromatids to the opposing sides of the cell during cell division. Soon after, the cell divides into two daughter cells, each of which has the same DNA.
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cells transplanted from the neural tube of a frog embryo to the ventral part of another embryo develop into nervous system tissues. this result indicates that the transplanted cells were:_____.
Cells transplanted from the neural tube of a frog embryo to the ventral part of another embryo develop into nervous system tissues. this result indicates that the transplanted cells were: determine
It has been found that cells transplanted from a frog embryo's neural tube to another embryo are tissues of the nervous system.
An immature cell that is predestined to differentiate and divide into particular tissue types to produce particular particular organs is referred to as a determined cell. In whatever setting, these decided cells would differentiate into their distinct cell type.
The growth of nervous system tissues from the transplanted neural tube therefore points to the neural tube's specified nature.
The critical areas of the frog brain are analogous to those areas of the human brain.
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the ________ is a flagellated cell that sweeps water through a sponge's body.
The choanocyte is a flagellated cell that sweeps water through a sponge's body.
Choanocytes( or' collar- cells'), are grouped within chambers. They're the main' pumping stations' for sponger survival. These collar cells have a bitsy central hair- suchlike scourge( flagellum) that laboriously beats to produce a water current.
The abecedarian element of the suite of cells in a sponger body is the choanocyte. Choanocytes are the cells that line the spongocoel and conduits of poriferans. They retain flagella and the collaborative movement of flagella pollutants the nutrients out from the water.
Choanocytes are specialized cells that have a single flagellum girdled by means of a net- suchlike collar of microvilli. Choanocytes join together to produce the choanoderm, where they perform their main functions. The first is to produce a inflow of water and the second is to capture food particulars as they pass through these cells.
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How do you identify and address any ethical, social, or environmental issues related to the classification of organisms?
Identifying and addressing ethical, social, or environmental issues related to the classification of organisms begins with understanding the history of species classification and its various implications.
What is classification of organisms?Classification of organisms is the process of assigning organisms to categories based on shared physical or biological characteristics. This process is used to group and organize organisms into a hierarchical system of classification, with each level being more specific than the last. This system of classification is based on the scientific method, and is used to help scientists study and understand the natural world. Classification of organisms is a key part of the scientific field of taxonomy, and is essential for understanding the diversity of life on Earth.
This includes evaluating the impact of classifying organisms into taxonomic groups and understanding the biases that may have been introduced by taxonomists in the past. It is also important to consider the ethical implications of how species are classified and how this classification can affect conservation efforts and the social and cultural implications of classifying certain organisms as “invasive species” or “pests.” Acknowledging and understanding these issues is the first step in developing an ethical and socially responsible approach to the classification of organisms.
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planktonic organisms that spend part of their life in planktonic form, and the rest of their life as either benthos or nekton are called:
Planktonic organisms that spend part of their life as plankton and the rest as nekton are called meroplankton.
Plankton are microorganisms that are found living in waters and are a source of food for other animals. Based on the life cycle of plankton can be divided into two, namely holoplankton and meroplankton.
Meroplankton is an aquatic organism that is part of its life cycle is planktonic and is the most critical phase because it has not been able to escape from predators. These organisms become plankton only when they become eggs and larvae, then they will become marine biota, namely nekton or benthos. Nekton are animals that can swim actively and freely and benthos are organisms that live attached to the seabed. Because only part of their life becomes planktonic, meroplankton are often referred to as semiplankton organisms.
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look at the picture please help !
Noncompetitive inhibition is binding of inhibitor to enzyme at a position other than active site, whereas competitive inhibition is binding of inhibitor to enzyme's active site.
What is an easy way to define enzyme?Enzymes are usually proteins that acts likes a biological catalyst. It quickens a particular internal chemical process in the cell. The enzyme is not degraded during the operation and is used constantly.
What is an enzyme's purpose?The chemical reactions, or metabolism, of our bodies are sped up by proteins known as enzymes. Some compounds are created, while others are broken down. Everything that is alive contains enzymes.
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HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP -will give points
Answer:
1. Interphase
2. Chromatin
3. Chromosomes
4. The equatorial plane
5. Anaphase
6. Cytokinesis
7. nucleolus
8. Interphase
9. The centromere of each pair of sister chromatids
10. Prophase
A mycologist studying an organism in the Deuteromycota group would find all the following except:
a. cell walls with chitin
b. a nucleus
c. zygospores
d. absorptive nutrition
e. asexual spores
Answer:
Answer: B. a nucleus
Explanation:
__act as biological catalysts allowing reactions to occur at the rate necessary
Answer:
Enzymes.
Explanation:
According to Britannica.com, an enzyme is "a substance that acts as a catalyst in living organisms, regulating the rate at which chemical reactions proceed without itself being altered in the process."
the part of a bacterial cloning vector that contains many restriction enzyme recognition sequences is called a...
The part of a bacterial cloning vector that contains many restriction enzyme recognition sequences is called Multiple cloning site.
In biotechnology, bioengineering, and molecular genetics, multiple cloning sites are a feature that allows for the insertion of foreign DNA without damaging the rest of the plasmid. Using genetic engineering, MCS can help create transgenic organisms, also known as genetically modified organisms (GMOs). When the MCS is cut open during manufacture, a gene of interest must be introduced to the vector in order to use the MCS for genetic engineering. The gene of interest will be present in the MCS after it has been created and ligated, and it can be amplified to increase the number of copies of the gene in a bacterial host. The gene of interest can be removed from the bacteria after it has replicated.
In some cases, a protein product can be made using an expression vector. Once the products are identified, they can be used for a wide range of purposes, including the manufacturing of insulin, vaccines, antibiotics, and gene treatments.
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FILL IN THE BLANK. a photoautotrophic unicellular organism with a shell made of silica is most likely a(n) ______.
A photoautotrophic unicellular organism containing a shell made of silica is most likely to be a diatom.
Photoautotrophic refers to the organism who can make their own food in the presence of sunlight energy. This process of synthesizing food is called photosynthesis. The example of such organisms is plants, some bacteria and fungi.
Diatom refers to the unicellular organisms that eukaryotic. They are algae that belongs to the Division Chrysophyta. These are the organisms found in the oceans and form an important part of the phytoplankton. These are majorly known for forming the diatomaceous earth after they are fossilized in the earth.
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What is an astronomical unit (AU)?
the diameter of the Sun
the radius of the Sun
the average distance between Earth and its moon
the average distance between Earth and the Sun
Answer:
An astronomical unit (AU) is the average distance between the Earth and the Sun, which is approximately 93 million miles or 149.6 million kilometers. It is used as a standard unit of distance in the field of astronomy.
Answer:
d
Explanation:
FILL IN THE BLANK. generally speaking, deserts are located in places where air masses are usually ________.
Deserts are located in the regions where the air masses are usually descending.
Deserts are the large masses of barren lands that contain sand. These areas have little to no vegetation and also do not have any huge water bodies. The precipitation is very low in such areas. About one-fifth of the Earth's land area is conquered by deserts.
Air mass can be defined as the volume of air at a significant uniform temperature, pressure and humidity. The air masses can extend for kilometers of area in any direction. The example of air masses is: Polar, Arctic, Equatorial, Tropical, etc.
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what are the functions of simple sugars
Answer: produce a spike in blood glucose, providing the body with a short-lasting source of energy.
Explanation:
38. All minerals
a. Form crystals b. Are inorganic c. Form naturally d. All of these
(Option D) All minerals has all the characteristics mentioned in the options.
Minerals are inorganic solids that exist in nature and have a distinct chemical composition and crystal lattice structure.
what are Minerals?A mineral or mineral species is, broadly speaking, a solid chemical compound with a very well-defined chemical composition and a particular crystal structure that happens to occur naturally in pure form in geology and mineralogy.
A mineral is an inorganic solid that occurs in nature and has a specific chemical composition and organized internal structure.
Types of mineralssome of the major types of minerals are:
Native elements. eg. Gold, Silver, Mercury, graphite, diamond.Oxides. eg corundum (incl. sapphire), hematite, spinel.Hydroxides. eg. Goethite, brucite.Sulfides. eg. Pyrite, galena, sphalerite.Sulfates. eg. Baryte, gypsum.Carbonates. eg. Calcite, magnesite, dolomite.Phosphates. Halides.learn more about minerals here
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what changes occur in height, weight, and body composition with aging? what accounts for these changes? how do these changes affect maximal oxygen uptake?
The changes that occur in height, weight and body composition with aging are loss of bone density, weaker muscles, decrease in height and weight can vary according to the diet intake by the body.
It is believed that reduction in height growth stops at the age of 20 for most of the people but studies how that height continue to increase till the age of 35-40 years but then it stops because of compression of the intervertebral disk. Osteopenia is the reduction in bone mineral density and osteoporosis refers to severe loss of bone mass with deterioration of the microarchitecture of bone. It causes increased chances of fracture. It also has hormonal links in adults along with poor diet and low exercise. Weight gain is common during pregnancy (in women) and excess caloric intake, and inability to mobilize fat stores but as age increases, weight decreases as body loses bone calcium and muscle mass. Exercise training can help to alter these process or slow the deterioration rate to some extent. It will also enhance oxygen uptake by the body.
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all dna polymerases require a primer with a 3’ oh group to begin dna synthesis. the primer is:
All DNA polymerases require a primer with a 3’ oh group to begin dna synthesis. The primer is a short stretch of RNA nucleotides.
DNA polymerases are characterised by their inability to manufacture new DNA strands from scratch, i.e., without first polymerizing 2 dNTPs. Instead, DNA is synthesised by DNA polymerases that need a stable primer that is already attached to the template strand. Primers are needed because DNA polymerases, which add deoxyribonucleotides to a fresh DNA strand, can only do so to the 3'-OH group of the an existing chain and cannot start synthesis from scratch.
Without an existing 3′-OH, DNA polymerase cannot create new DNA. As a result, an RNA primer is needed for DNA replication to begin before strand creation. While RNA polymerase is utilised during transcription to create the mRNA strand, DNA polymerase creates a DNA strand and is employed in DNA replication. Contrary to DNA polymerase, RNA polymerases need not truly have proofreading mechanisms and do not always require the so-called primer to begin the activity.
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