Answer:
Prehistory, also known as pre-literary history, is the period of human history between the use of the first stone tools by hominins c. 3.3 million years ago and the beginning of recorded history with the invention of writing systems.
Explanation:
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The term multiple alleles refers to the presence of ______ or more alleles in the population.
The term multiple alleles refer to the presence of three or more alleles in the population.
In the field of science, an allele can be described as any of the variant forms of a gene that is found at a particular gene locus. The specific place that an allele has on a chromosome is referred to as the loci of the allele.
Multiple alleles can be described as more than two alleles that are found in a particular population at a given time.
When three or more forms of an allele occur in a population then these multiple alleles cause diversity in a population.
An example of the presence of multiple alleles in humans is the ABO blood group system. There are three alleles found in this blood group system.
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What is one way that insects can indicate that an animal was killed by a hunter as opposed to disease or illness?.
Answer: it sticks to it
Explanation:
Which of the organelles have their own dna separate from dna contained in the nucleus?
Mitochondria and chloroplasts are the two organelles that have their DNA separated from the DNA contained in the nucleus.
Organelles are the specialized organs for a eukaryotic cell to perform various functions. They are usually protected by a membrane(s) and are found in the cytoplasm of the cell. The various organelles found in a eukaryotic cell are the nucleus, peroxisomes, lysosomes, mitochondria, chloroplasts, ribosomes, Golgi apparatus, and endoplasmic reticulum.
The nucleus is the site for DNA replication. It then produces RNA by the process of transcription. This RNA is then transferred to ribosomes for protein synthesis. These synthesized proteins are then transferred to various cell organelles to perform their specific functions.
Meanwhile, the mitochondria and chloroplasts are the two organelles that do not need proteins synthesized by the ribosomes. They can synthesize their proteins themselves as they have their DNA separated from the DNA of the nucleus. Because of this characteristic, they are also referred to as semi-autonomous.
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_______ are the form that human needs take as they are shaped by personality, culture, and buying situation.
Answer:
Social Needs . are the form of human needs take as shaped by culture & individual personality.
Explanation:
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The nurse understands that which intervention is most appropriate for a patient with rh-negative blood who is unsensitized and just received percutaneous umbilical blood?
The correct answer for this question is RhoGAM administration
RhoGAM is an antibody solution derived from plasma donors. RhoGAM is being prescribed by your doctor because you are Rh-negative. It is normal for a small amount of the baby's blood to enter your bloodstream during pregnancy. There will be a blood type mismatch when the blood from your Rh-positive baby enters your Rh-negative bloodstream. This is known as Rh incompatibility. Your immune system recognizes the baby's red blood cells as "foreign," and antibodies are produced to try to eliminate them. If you take RhoGAM at the right time, it will keep your immune system from reacting to your baby's blood. RhoGAM is made from human blood and may carry a risk of transmitting disease-causing agents.
Rh incompatibility occurs when a Rh-negative mother falls pregnant with a baby who has Rh-positive blood.
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what is correct about a complex molecule and the components into which it breaks down?
The huge structure made up of numerous smaller pieces are complex molecules. Amino acids are formed from the complex molecules known as proteins.
Large chemical molecules with a key function in cellular and metabolic processes are known as proteins. They provide a variety of responsibilities and functions and have been of the utmost important for the live cell.The theory holds that amino acids, which function as monomers, are the building blocks of proteins. The polymeric structure of the protein is created by the amino acids joining together via peptide bonds. At the conclusion of translation, an amino acid is created and modified to create proteins.Once a protein source enters your stomach, it is broken down into smaller chains of amino acids by hydrochloric acid and proteases enzymes. Peptides, which are dismantled by proteases, are what connect amino acids together.Therefore, option B. is correct.
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The complete question is:
Which of the following is correct about a complex molecule and the components into which it breaks down?
A. Sugars break down into proteins.
B. Proteins break down into amino acids.
C. Carbohydrates break down into fats.
D. Fats break down into monosaccharides.
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Explain the process and bonds involved in the ability of RNA to fold into complex 3-D shapes, similar to those of tertiary proteins.
RNA molecules fold into complex 3-D structures when base pairing occurs between nitrogen base pairs. The bonds forned are hydrogen bonds.
What are RNA molecules?RNA molecules refers to nucleic acids which are built from ribose sugar molecules instead of deoxyribose as in DNA molecules.
RNA molecules as in DNA are composed of a sugar backbone, a nitrogenous base, and phosphodiester linkages.
The nucleotides found in RNA molecules are:
uraciladeninecytosine andguanineRNA is able to form complex 3-D structures even though they are single-stranded because of base pairing that occurs between adenine and uracil, and guanine to cytosine.
The bonds present in thebase pairs are hydogen bonds.
Hydrogen bonds are bonds which are formed between hydrogen and a highly electronegative atom such oxygen, nitrogen, chlorine, and fluorine.
In the RNA molecule, hydrogen bonds form betweenthe oxygen and nitrogen atoms of the either uracil, adenine, cytosine, or uracil.
These hydrogen bonds results in three-dimensional structures of RNA.
In conclusion, RNA molecules are single-stranded nucleic acids materials.
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In eukaryotes, the endoplasmic reticulum, golgi apparatus, lysosomes, vacuoles, nuclear envelope, and plasma membrane form a network of membranes called the:_________
According to the research, the correct option is endomembrane system. In eukaryotes, the endoplasmic reticulum, golgi apparatus, lysosomes, vacuoles, nuclear envelope, and plasma membrane form a network of membranes called the endomembrane system.
What is endomembrane system?It is the set of internal membranes that divides the cell into compartments formed by ER, Golgi complex, endosomes, lysosomes and nuclear envelope, all these organelles are members of the same family and communicate intensely with each other and with the outside of the cell via transport vesicles.
In this sense, it makes it possible to compartmentalize its interior, creating different spaces in which reactions can be carried out, participating in the production of cytoplasmic organelles.
Therefore, we can conclude that according to the research, the correct option is endomembrane system. In eukaryotes, the endoplasmic reticulum, golgi apparatus, lysosomes, vacuoles, nuclear envelope, and plasma membrane form a network of membranes called the endomembrane system.
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The concept that human and animal diseases are caused by microorganisms is called the:________
The concept that human and animal diseases are caused by microorganisms is called the germ theory
In medicine, germ theory is the belief that certain illnesses are caused by the body's attack by micro - organisms that are too small to see without a microscope.
The germ theory of disease indicates that micro - organisms like viruses, protozoa, bacteria, or fungi cause many diseases. The growth and reproduction of microorganisms cause these diseases.
Louis Pasteur developed the germ theory of disease. He also carried out a number of experiments to demonstrate the link between diseases and microorganisms.
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Cara and evan are participating in a half-sibling study. they share about what percentage of their genes?
25 Percentage of their genes they share.
Genes- In every type of living creature, a gene is a highly precise sequence of nucleotide monomers that has the power to fully or partially regulate the expression of one or more features. Deoxyribonucleic acid (DNA) and, in the case of certain viruses, ribonucleic acid (RNA) polymers are used to create genes.
DNA- The molecule found inside cells that carries the genetic material necessary for an organism to grow and operate. This knowledge may be handed on from one generations to the next thanks to DNA molecules.
RNA- Instead of the deoxyribose present in DNA, the backbone of an RNA molecule is made up of alternate phosphate groups and the sugar ribose.
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A train traveled at 350 km in 2.5 hours. What was the average speed of the train?
Answer:
140 km per hour.
Explanation:
350 divided by 2.5= 140
The average speed of the train was 140 kilometers per hour.
Speed is a unit used to describe how fast something is moving with respect to another object. Due to its scalar nature, it has only magnitude and no direction. By dividing the distance traveled by an object by the time required to cover that distance, one can calculate its speed.
The formula for calculating speed is as follows:
Speed = Distance / Time
In the International System of Units (SI), the meter per second (m/s) is the accepted unit for measuring speed. Nevertheless, other common units for speed include kilometers per hour (km/h) and miles per hour (mph), depending on the situation and location.
We can use the following calculation to determine the typical speed of a train:
Average speed = Distance traveled / Time taken
In this example, the train covered this distance of 350 km in 2.5 hours.
Average speed = 350 km / 2.5 hours
Average speed = 140 km/h
Therefore, the average speed of the train was 140 kilometers per hour.
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The molecular clock has limited usefulness for estimating divergence times among species in part due to the saturation of dna sequences. This occurs because.
(D) in highly diverged lineages, substitutions will occur at sites that have been substituted previously is the reason why the molecular clock has limited usefulness for estimating divergence times among species in part due to the saturation of dna sequences.
The frequency of a molecular clock represents the quantity of alterations or mutations that have occurred in a lineage of organisms' DNA or protein sequences. It can be used to estimate the historical moment at when two lineages separated from one another.
However, modifications may occur more than once for a particular site in highly divergent lineages (i.e., those lineages that were divided extremely far back in evolutionary time). As a result, and in part because of the saturation of DNA sequences, it won't be useful for estimating divergence periods among species.
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Question correction:
The molecular clock has limited usefulness for estimating divergence times among species in part due to the saturation of DNA sequences. This occurs because
A. DNA sequences are unable to revert back to previous allelic states.
B. the variation in the substitution rate between closely related lineages prevents accurate estimation of divergence time.
C. variation in population sizes among lineages changes the effect of genetic drift.
D. in highly diverged lineages, substitutions will occur at sites that have been substituted previously.
Answer:
The molecular clock has limited usefulness for estimating divergence times among species in part due to the saturation of DNA sequences. This occurs because In highly diverged lineages, the substitutions process will occur at sites that have been substituted previously.
Explanation:
The mutation rate is used by the molecular clock to shorten the ancient period during which living forms separated. Both amino acid sequences plus DNA's nucleotide sequences are used by the molecular clock.
Only the percentage of mutations as well as other modifications over a predetermined period of time are recorded by this clock. Frequently, a property's usefulness may be restricted by the lineages' extreme diversity. The researchers come to the conclusion that molecular clocks are significantly so "erratic" comparatively previously believed, making them essentially worthless for maintaining precise evolutionary time. They blame natural selection's biases, which can occasionally prevent particular genetic mutations in particular lineages.
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The appearance or quality of light reflected from the surface of a mineral is known as ________.
The appearance or quality of light reflected from the surface of a mineral is known as luster.
In mineralogy, luster refers to how a mineral surface appears in terms of its capacity to reflect light. The degree of transparency, diaphaneity, and structure of a mineral all affect its luster.
A mineral's ability to reflect light is referred to as luster. The first step in identifying a mineral is to measure it. Always examine a brand-new surface for luster; you might need to remove a tiny amount of material to reveal a clean sample. Metallic luster, which is extremely reflective and opaque, to dull luster (non-reflective and opaque.)
Mineralogists use the physical characteristic of luster to identify minerals. A mineral's luster defines how its exterior reflects light and how its inside may bend or refract light. Some minerals have a metallic sheen, while others don't.
A mineral reflects light by having a luster. The two main categories of luster are described by the labels metallic and nonmetallic. The most popular words for luster are shown in Table 7, along with an illustration of a comparable mineral. Some minerals are described as "earthy," "chalky," or "dull" because they lack luster.
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A client having an allergic reaction to mold, describes chest tightness and difficulty breathing. which process is occurring?
A customer who is allergic to mold reports chest tightness and difficulties breathing process is occurring Contraction of smooth muscle in the bronchi.
What is the breathing process?When you breathe in (inhale), air enters your lungs, and the oxygen in that breath flows to your blood. At the same time, a waste gas termed carbon dioxide moves from your blood to your lungs and is expelled (breathed out).. Gas exchange is a procedure that is vital to life.
Which four breathing steps are there?The simple movements of inhaling and exhaling are only a small portion of the intricate process of respiration, which consists of the following four steps:
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When fighting the human immunodeficiency virus (hiv), the nurse knows that the drug regimen usually includes which?
The most successful course of therapy involves a number of drugs taken together.
Drugs- A medicine (Drug) is an organic chemical having a recognized structure that, when administered to a living entity, has a biological effect. These substances are referred to as pharmacological agents. A chemical substance known as a pharmaceutical medicine is used to treat, diagnose, prevent, or assess sickness as well as to enhance wellness. It is also referred to as a drug.
Therapy- A style of medicine that treats illness using drugs derived from living things. These compounds could be produced in a lab or they might be found naturally in the body. Some biological cancer treatments activate or inhibit the immunological system to support the body's fight against cancer.
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Which side of the cerebellum is concerned with movements of the right hand?
The right side of the cerebellum is concerned with movements of the right hand.
Cerebellum is located at the backside of the brain. Almost 50% os the nerve cells are present in the cerebellum area of the brain. The functions that the cerebellum regulates are: motor skills. movement, coordination, posture, equilibrium and balance.
The hand is the appendage of the body that emerges from the shoulder and consists of the forearm, the upper arm, the palm and the fingers. Although, the palm and the fingers are specifically referred as hands. The upper arm and the forearm together from the arm region.
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In humans, any cell with 23 pairs of chromosomes is said to be diploid. sperm and egg cells, however, are?
In humans, any cell with 23 pairs of chromosomes is said to be diploid. sperm and egg cells are Diploid; Haploid
What is a haploid?
A cell is said to be haploid if it only has one set of chromosomes. The number of copies of the genome is referred to as ploidy. Numerous other organisms, including humans, are diploid. This indicates that each cell contains two copies of the genome for the bulk of its whole existence. Haplotype cells are often produced for reproduction. One copy of the genome allows for the reorganization of various copies during zygote formation. Numerous novel DNA combinations are made available in the progeny by making the DNA content of the gametes haploid. This boosts genetic diversity and aids in population climate adaptation.
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The large stained-
pink circle in the
middle of each cell
is most likely...
The large stained-pink circle in the middle of each cell is most likely the cell nucleus.
Eukaryotic cells, which have a distinct nucleus and other membrane-bound organelles, have the cell nucleus, a membrane-bound organelle. DNA, which contains instructions for the development and function of a cell, is one of the genetic material found in the nucleus of a cell.
In microscopic pictures or stained cell samples the nucleus often appears as a distinct, round or oval structure with a darker stain than the surrounding cytoplasm. The staining clarifies the presence of DNA and shows where the nucleus is located within the cell.
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Oligosaccharide chains added in the er can undergo further modification in which organelle(s)?
Oligosaccharide chains added in the ER can undergo further modification in both the cis and trans sacs of the Golgi Apparatus.
What is the Golgi Apparatus?The Golgi Apparatus is an organelle composed of groups of planned sacs that serve to modify lipids and proteins and thus acts as a processing center for these macromolecules.
The Golgi Apparatus is a fundamental eukaryotic organelle of the endomembrane system and this structure transports all processed products to their final destination (e.g., lysosomes of the cell membrane).
In conclusion, Oligosaccharide chains added in the endoplasmatic retuiculum can undergo further modification in Golgi Apparatus.
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in fermentation, the only atp produced was during glycolysis and the fermentation reactions usually result in resetting the nadh to nad.
It is true that in fermentation, the only ATP produced was during glycolysis and the fermentation reactions usually result in resetting the NADH to NAD.
Fermentation is the process of breakdown of sugars to yield lactic acid or alcohol, along with some energy. This process occurs in the absence of oxygen and the by-products of the reactions are heat and an effervescence of CO₂. Fermentation commonly occurs with the help of yeasts.
Glycolysis is the process of breakdown to sugar to yield pyruvate. it occurs without the help of oxygen and is common process in both aerobes as well as anaerobes. The net gain of energy from glycolysis is of 2 ATPs and 2 NADH molecules.
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In the obsolete five-kingdom system, prokaryotes were included within which group?
a. monera
b. animals
c. prokarya
d. eukarya
Option(a) Monera is the correct answer.
In the obsolete five-kingdom system, prokaryotes were included within Monera group.
What are prokaryotes?Prokaryotes are creatures without a nucleus or other organelles in their cells. Bacteria and archaea, two separate groupings of prokaryotes with allegedly independent evolutionary histories, are separated into. The majority of prokaryotes are tiny, single-celled creatures with a straightforward structure.The definition of Monera:the prokaryotic kingdom that includes bacteria, reproduces primarily asexually by budding or fission, and obtains its nutrition through photosynthesis or chemosynthesis.What are five Monera examples?Cyanobacteria, which are blue-green algaeStreptococcus, which are cocci-shaped bacteria E. ColiVibrio cholerae (cholera)Treponema pallidum (syphilis)other bacteria with a spiral form.To learn more about Monera visit:
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How many letters of an rna molecule in a sequence does it take to provide the code for a single animo acid?
Three letters of an RNA molecule in a sequence are involved in providing the code for a single amino acid, and this three-letter code is called the codon, and tRNA have the anticodon sequence which is complementary to the mRNA codon sequence.
Each group of three letters consecutive nucleotides in RNA is called a codon, and each codon specify either one amino acid or it stop to the translation process.
Therefore, The codons in an RNA molecule do not directly recognize the amino acids, but they specify the group of three nucleotides. They bind directly to the amino acid rather than the translation of mRNA into protein.
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ASAP..Will mark Brilliantest
Alex poured some pond water into three beakers. She then put waterweed into each beaker. She put the beakers in different places.
b. In the school pond there were lots of water lilies with large leaves covering the surface. There were not many plants growing below the surface. Suggest a reason for this.
Answer:
I can't see any picture
Explanation:
No because for real?
15. Jessie is concerned about how tired his classmates seem. He created
a drink that he thinks will boost their energy. He recruits 100 classmates
with a history of tiredness. He has 50 of them drink his new special energy
drink. The other 50 drink a beverage that looks like the special energy
drink, but is just water and food coloring. Both groups were told that they
were getting the special drink that would boost energy. After 2 hours, 30
classmates in the first group reported having more energy and 8
classmates in the second group reported having more energy. What is the
independent variable?
Answer: type of drink
Explanation:
Secondary minerals are most prominent in the ________ fraction of soils.
a. organic
b. silt
c. clay
d. sand
Option c. is correct. Secondary minerals are most prominent in the clay fraction of soils.
Soil minerals are a natural source of plant nutrients that are released gradually over time as a result of chemical weathering. While secondary minerals are a byproduct of chemical weathering and are formed either by partial chemical alteration of primary minerals or by chemical precipitation from the reaction of components dissolved from other minerals.
The majority of secondary minerals are soil-stable hydrated aluminosilicates or Fe and Al oxyhydroxides. The majority of hydrated aluminosilicates are phyllosilicates also known as clay minerals, which are the most common secondary minerals in Canadian soils.
The fraction of clay minerals is fundamentally different from the sand and silt fractions, not only in grain size but also in mineralogy. It typically contains secondary minerals which are by-products of chemical weathering and re-precipitation. Although some clay minerals are amorphous, crystalline clay minerals are the most common.
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The enzyme phosphorylase catalyzes the conversion of ___________ into ___________.
Answer:
glycogen; glucose-6-phosphate
True or false? all medical assistants can legally perform injections under the supervision of a physician.
Legally, any medical assistant who is working under a doctor's direction can administer injections. False: Even when given under a doctor's supervision, medical assistants cannot provide injections in all states.
What is a physician?A physician, often known as a doctor of medicine, frequently focuses on non-surgical care for patients' ailments. That's not to argue that becoming a doctor isn't useful most specialties have a distinctive variety of procedures related to them.
What kind of doctor is a physician?A doctor with a medical degree is referred to as a "physician" in general. Physicians investigate, diagnose, and treat illnesses and injuries in an effort to preserve, promote, and restore health. Typically, a doctor has six fundamental skills patient care.
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Which part of your brain is essential for receiving information that you are moving your legs?
Motor coretex is essential for receiving information that you are moving your legs.
What is motor cortex?The motor cortex's main job is to provide signals that control how the body moves. It is anterior to the central sulcus and a portion of the frontal lobe. The primary motor cortex, premotor cortex, and supplementary motor area make up this region. The motor cortex generates signals that are particular to movements and sends them to the muscles via spinal cord circuits and motoneurons to regulate motor behavior. For the execution of movements to be precise, coordinated muscle activation patterns are required.Learn more about the structure of brain with the help of the given link:
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Hair cells located near the base of the basilar membrane respond best to ________ sounds.
Hair cells located near the base of the basilar membrane respond best to low-pitched sounds.
Hair cells are the sensory cells of the ear. These receive the stimulus in the form of sounds and then convert it into electrical signals to be transmitted to the brain. They are called hair cells because they appear as hair-like ciliated structures.
Low-pitched sound is the one generated due to low frequency of the sound waves. It is also known as the Hoarse sound. The example of low pitched sounds are: thunder, roaring of lion, ringing of bell, etc. A low-pitches sound is said to be deep.
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The use of microbial metabolism to remove or neutralize human waste and industrial pollutants is known as?
The use of microbial metabolism to remove or neutralize human waste and industrial pollutants is known as Bioremediation.
Bioremediation- A subfield of biotechnology called "bioremediation" uses living things like bacteria and microorganisms to clean up contaminated environments. It is used to clean up poisons, pollutants, and other contaminants from water, soil, and other habitats.
Microbial Metabolism- A microorganism receives the energy and nutrients (such as carbon) it needs to survive and reproduce through microbial metabolism.
Industrial pollutants- Sulfur dioxide, volatile organic solvents, and particulate particulates, such as metal dust, are the main industrial pollutants that have an impact on air quality. Dioxins and other dangerous chlorinated chemicals can be produced when garbage, especially plastics, are burned.
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