Answer:
chemical
expand
acid rain.
rushing water.
runoff
glacier
wind.
windbreaks
Explanation:
The correct terms for the given fill in the blanks are:
1. A tree root breaking a rock into smaller fragments is an example of both chemical and mechanical weathering. Weathering is the breakdown of rock into smaller particles.
2. The rocks when are exposed to heat, expand contributing to thermal stress.
3. Sulfur dioxide and nitrogen oxide are harmful gases, which react with water in the air to form acid rain.
4. The agent of erosion involved in stream erosion is referred to as rushing water.
5. The ground is so saturated that it can't absorb rainfall or heavy and quick rainfall does not allow the ground to absorb the water forming runoffs.
6. Glacier is a huge, heavy, moving body of ice that picks up rocks and sand and erodes the ground beneath it as these materials scrape across it.
7. Hot arid climates are prone to erosion by wind.
8. Windbreaks refer to the rows of trees and shrubs planted to protect fields from wind erosion.
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explain the scientific theory of evolution and the evidence scientist found that proves it to be valid ?
Answer:
There are many theories
But main evidences are
Fossils of Plants animals and other organisms who lived on this planet at sometime. Oprain And Halden theory which suggests the chemical and biological evolution.Vaccination is a process of injecting a dead or weakened form of a pathogen into the body. How does this help strengthen the immune system? It allows the body to increase its internal temperature. It allows the body to regulate the inflammatory response. It allows the body to keep pathogen information for future infections. It allows the body to increase its desire to eat healthy food.
Answer:
It allows the body to keep pathogen information for future infections.
Explanation:
Vaccination is the process whereby a substance called VACCINE is injected into body in order to prepare the immune system for resistance against infections. A vaccine contains the harmless or dead version of a pathogen called ANTIGEN, which functions to give the immune system defense mechanism against that form of pathogen in future.
The vaccine works by stimulating the immune system of the body to fight against the antigens in the same way it will fight against an actual pathogen in the future. Hence, the body keeps the information on how to combat such pathogens when there is an actual infection.
Answer
The answer is C edge 2020
Explanation:
During the 1800's, what country was a leader of world exploration and placed at the center of most maps?
A. Britain
B. Spain
C. Morocco
D. USA
Answer:
B. Spain
Explanation:
Portugal and Spain are the western European nations that were the primary players in the age of discovery in 18th century. Under the leadership of prince henry the navigator. With the spread of missionary activities, Christianity becomes the world's largest religion. Exploration of the Americas and other nations started from this place.Given the gene sequence GGACCGTCGATCTTC, which of the following choices would represent an inversion mutation? A. GGACTCGATCTTC B. CCACCGTCGATCTTC C. GGACCGTCGATCTTC D. GGACCGTCGATCCTT
Answer:
D. GGACCGTCGATCCTT
Explanation:
Mutation refers to any change in the nucleotide sequence of a gene. Mutation can be of different types depending on how it occurs. According to the question, an INVERSION mutation is a type of mutation in which a segment of a gene gets broken off and reattached in another way on the same DNA. Hence, the only change in inversion mutation is the arrangement of the nucleotide bases on the gene.
Considering the nucleotide sequence: GGACCGTCGATCTTC, the sequence that describes an occurrence of inversion mutation is: GGACCGTCGATCCTT because the segment TTC in the original sequence has been rearranged as CTT in the mutated sequence.
Answer: GGACCGTCGATCCTT
Explanation: mutation means change and there is change in the gene sequence
Biochemical and genetic experiments have demonstrated that the _________ of tRNA are important for recognition by its cognate aminotransferase-tRNA synthetase.
Answer: Acceptor stem and anticodon loop.
Explanation:
Transfer RNA (tRNA) is a small RNA nucleic acid involved in protein synthesis (translation). Each tRNA molecule has two important areas:
A region of trinucleotides, called the anticodon A region where a specific amino acid binds.During translation, the ribosome reads the sequence of the mRNA in groups of three bases to assemble the protein. So, in the mRNA chain there are codons, set of three bases, which determine the amino acid to be added to the peptide chain. The tRNA transfers the amino acid to the ribosomes, and then arranges them along the messenger RNA (mRNA) molecule. Then, the tRNA must have an anticodon that is complementary to the codon. Each type of tRNA is specifically combined with 1 of the 20 amino acids to be incorporated into proteins.
This means, during translation, each time an amino acid is added to the growing chain, a tRNA molecule is formed whose base pairs have a complementary sequence with mRNA molecule, ensuring that the appropriate amino acid is inserted into the protein. So, tRNA is a key link between RNA transcription and the translation of that RNA into protein. On the other hand, aminotransferases are enzymes responsible for attaching amino acids to the 3ʹ‐end of cognate tRNAs.
The acceptor stem is the site of attachment of amino acids to tRNA, and anticodon loop is the site of tRNA that is complementary to the codons found in mRNA (that determine the amino acid that will be added) This means, both parts are important for recognition, because the acceptor stem is where the amino acid is, and the anticodon loop ensures that the appropriate amino acid is inserted into the protein.
Mitochondrial and chloroplast genomes typically Mitochondrial and chloroplast genomes typically encode some of the proteins needed for aerobic respiration and photosynthesis, respectively, as well as ribosomal and transfer RNA. encode for ribosomal and transfer RNAs. encode all of the proteins needed for aerobic respiration and photosynthesis, respectively. encode some of the proteins needed for aerobic respiration and photosynthesis, respectively. are composed of primarily noncoding DNA.
Answer:
The correct answer is "encode some of the proteins needed for aerobic respiration and photosynthesis, respectively, as well as ribosomal and transfer RNA".
Explanation:
Most organisms have a mitochondrial or a chloroplast genome in addition to the main genomic sequence located in the cell nucleus. The genes that are located in these organelles' genome include the genes that are used directly in the mitochondrion or chloroplast , including: proteins needed for aerobic respiration and photosynthesis (for instance genes involved in oxidative phosphorylation), respectively, as well as ribosomal and transfer RNA, which serve to the translation of proteins.
Which element provides strength to the exoskeletons of clams and oysters?
sulfur
oxygen
hydrogen
phosphorus
Phosphorus provides strength to the exoskeletons of clams and oysters. Thus, the correct option is D.
The exoskeleton of organisms including clams and oysters is made up of primarily calcium in the form of calcium phosphate and calcium carbonate.
Calcium phosphate is also present in the form of hydroxyapatite which is Ca₁₀(PO₄)₆(OH)₂ which provides invariable strength to the exoskeletal structure.
Thus, as phosphorus is a part of the exoskeleton, the correct option is D.
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Which of the following statements is true of soluble fibers? a. They are not viscous. b. They retain their tough texture after being cooked. c. They impart gel-like characteristics to foods. d. They always resist fermentation. e. They are tough and stringy.
Answer:
The answer is "Option C".
Explanation:
The soluble fiber was fiber and in the diet which is prescribed to increase metabolism, reduce cardiovascular problems, cure constipation, and is ideal for patient diabetes.
This consumes food water and provides support with gel-like characteristics, which are rich in fiber in foods like rice, fruits, and bovines. They all are essential for fitness, digestion, and preventive medicine. It draws in liquid(water) while absorption and transforms into a gel. It slows it down the digestive cycle.Which of the following describes the most likely impact that exposure to pollutants in the atmosphere would have on one’s personal health?
Answer:
It will lead to upper respiratory infections and pneumonia.
Explanation:
A student hypothesized that EC growth might be affected by the DNA from circulating erythrocytes. Is this student’s hypothesis reasonable?
Answer:
Explanation:
It can be said that this hypothesis is actually not reasonable because circulating erythrocytes do not contain DNA. This can be proven by the Mammalian erythrocytes (rbcs) which ultimately loose their nuclei as well as many other organelles during their maturation process and they don't have nuclei or mitochondria meaning that they are not affected by the DNA.
Watch the video and answer the question in 2 or 3 paragraphs. What are the main causes of air pollution? Discuss some effects of air pollution and provide possible solutions to this environmental issue. https://youtu.be/_dTtvtlct9k
Answer:
Explanation:
Exhaust from vehicles, factories, volcanoes and wildfires are the major causes of air pollution.
Effects of air pollution include many diseases. For example heart disease, lung disease, respiratory diseases etc... They also damage nerves, brain, kidney, lungs, heart etc...
Solution to air pollution:
We should replace the fossil fuels with natural energies like solar, wind, geothermal, hydro etc...
Waste water treatment
Dust control
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Which enzyme is used in gluconeogenesis, but NOT in glycolysis? Group of answer choices PEP carboxykinase enolase (interconverts 2-phosphoglycerate and phosphoenolpyruvate)
Answer:
PEP carboxykinase
Explanation:
PEP carboxykinase is also known as Phosphoenolpyruvate carboxykinase. It is an enzyme which is used for the production of glucose from non-carbohydrate carbon substrates. This enzyme is used only in gluconeogenesis not in glycolysis because this enzyme helps in the production of glucose while glycolysis is a process in which the glucose break down into pyruvate and ATP molecules.
When brown iodine is exposed to starch it turns dark purple. In an experiment, you placed a cornstarch solution in a small plastic bag. Next, you placed the bag in a beaker of water containing 10 drops of iodine. If the solution in the plastic bag turned dark purple (Select all that apply)
a) the plastic bag was permeable to cornstarch.
b) the plastic bag was permeable to iodine.
c) the iodine moved into the plastic bag.
d) the cornstarch moved into the beaker.
e) the plastic bag was selectively permeable.
Answer:
b) the plastic bag was permeable to iodine
the plastic bag was selectively permeable
the iodine moved into the plastic bag.
the plastic bag was permeable to cornstarch.
Explanation:
The experimental set up represented the concept of osmosis.That is the movement of water molecules from the region of higher water potential to region of lower water potential through a semipermeable membrane(a cell membrane which only allows water and certain molecules to pass through,but restrain other molecules through its pores.
Generally potassium iodine test is the standard test for starch.
Therefore, in the question,water moves iodine molecules as iodine solution(from high water potential) to move across the paper bag(semi permeable membrane) to the reach the corn solution.(low water potential,high solute potential).This turns the starch in the corn solution blue-black/purple.
If the solution in the plastic bag turned dark purple:
the plastic bag was permeable to iodine. That is option (B)the iodine moved into the plastic bag. That is option (C)the plastic bag was selectively permeable. That is option (E)To test for the presence of starch in a solution, iodine solution is used. This gives a blue-black coloration which occurred due to the formation of a starch-iodine complex.
From the above experiment, the plastic bag which contains the corn starch solution, separates the solution from water containing 10 drops of iodine.
The turning of the solution, inside the plastic bag, into blue black signifies the formation of starch-iodine complex between the cornstarch solution the iodine water.
The reaction was able to occur because the plastic bag, which is selectively permeable to iodine, allowed the movement of iodine from the beaker of water into it. This is called diffusion.
Therefore, if the solution in the plastic bag turned dark purple it means that the plastic bag which is semi permeable allowed the movement of iodine into it.
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Why must you include the water soluble vitamins in your daily diet? They cannot be stored by the body because they are water soluble and are eliminated daily. They help carry oxygen in the blood They help digest fats. They help build body tissue.
Answer:
They cannot be stored by the body because they are water soluble and are eliminated daily.
Explanation:
_is a molecule that directs all of a cells activities
Answer:
[tex]\boxed{\mathrm{Nucleus}}[/tex]
Explanation:
The nucleus directs all cellular activities. The nucleus also contains genetic material of eukaryotic organisms.
Which of the following small GTPases are NOT involved in vesicle budding or docking? A. ARF B. Rab1 C. Ras D. Sar1p
Answer:
option c is correct that is Ras
Explanation:
Which process involves a decrease in the dispersal of matter? Select the correct answer below: heat exchange between two solids
Answer:
The options are
A.heat exchange between two solids
B.the decomposition of a compound into its constituent elements
C.the precipitation of a solid
D.none of the above
The answer is
C.the precipitation of a solid
Dispersal of matter involves the process whereby there is more space occupied by the resulting element/compound than the initial one. For example the conversion of liquid to gas means that it has an increase in the dispersal of matter as the gas particles will contain more space when compared to a liquid.
Precipitation of a solid means conversion of a liquid to a solid. A liquid is known to contain more space which means there is a decrease in the dispersal of matter.
The process that involved the reduction in the dispersal of matter should be the precipitation of a solid
What is the dispersal of matter?It refers to the process in which it contains the additional space that should be occupied. Like the conversion of the liquid to gas represent there should be increment in the disperson of the matter since the particles of the gas comprise more space at the time when the comparison is to be done with the liquid. Here, precipitation of the solid represent the transformation of the liquid to the solid.
This question is incomplete. Please find the options below.
A.heat exchange between two solids
B.the decomposition of a compound into its constituent elements
C.the precipitation of a solid
D.none of the above
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what is a radical a group of ions
Answer:
A radical is a group of atoms of elements carrying a charge. radicals or ions are formed by gaining or loosing ions. positive radical ions are called radical cations whereas negative radical ions are called radical anions.
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The force of a muscle contraction is higher when the muscle is stimulated every 0.5 secs than when stimulated with the same voltage every 0.05 seconds.
a. True
b. False
Answer:
b. False
Explanation:
Increasing the frequency of muscle stimulation causes wave summation to occur, which causes an overlap of muscle twitch. When this muscle summation happens, the force generated in the muscle increases. This means that stimulating the muscle every 0.5 seconds will generate less muscle contraction force than when stimulated every 0.05 seconds
Carbon first enters the food web in Multiple Choice humans. vertebrates. invertebrates. green plants. soil bacteria
Answer:
Green Plants
Explanation:
Carbon enters all food webs, both terrestrial and aquatic, through autotrophs, or self-feeders.
TIME PEM
01:57
The majority of early psychological research reflected the
A differences among males and females
В. concerns and interests of minorities
C. differences among various cultures
concerns and interests of white males
Where does cellular respiration get
the energy to make ATP? *
A. Chemical energy from sugars
B.Light energy from the Sun
C.Energy stored in the covalent bonds of
water molecules
D.Energy stored in the covalent bonds of
carbon dioxide molecules
Answer:
I believe A.
Explanation:
Cellular respiration gets energy to make ATP from the food you eat, so, A.
g why did you digest the plasmid with XhoI? What is your expectation if the plasmid is a closed vector without an insert? What is your expectation if your plasmid has an insert (how many bands, what are their sizes)?
Answer:
I digest the plasmid with Xholin so as to find out the total size of the plasmid after insertion of the gene of interest and whether or not the insert went into the vector. Ao the plasmid is a reclosed vector without an put we expect to see one band. However, if the plasmid has an insert, we expect to see two bands on the gel
Which is/are possible genotypes for a person with straight little finger and brown eyes?
a. bbrr
b. bbRR
c. BbRr
d. bbRr
Answer:
The correct answer is b. bbRR.
Explanation:
Brown eyes color is dominant over blue eyes color. So, we can assign the letter R to the dominant allele that expresses brown eyes and r to the recessive allele that expresses the blue eyes. The phenotype bent little finger is dominant over the phenotype straight little finger. We can assign the letter B to the dominant allele, and b to the recessive allele.a. bbrr : This genotype belongs to a person with blue eyes and straight little finger
b. bbRR : This genotype belongs to a person with brown eyes and straight little finger
c. BbRr : This genotype belongs to a person with brown eyes and bent little finger
d. bbRr: This genotype belongs to a person with brown eyes and straight little finger.
Enzymes are protein molecules which are made up of long chains of
List three protozoan infections of the circulatory system that are transmitted by arthropods. Include the disease name, specific organism (genus species), vector that is the intermediate between hosts, and disease progress in humans.
Answer:
List three protozoan infections of the circulatory system that are transmitted by arthropods:
Malaria
Toxoplasmosis
Chagas disease (American trypanosomiasis)
Explanation:
Malaria is a prozotoan infection, that can be produced by several protozoan, in the genus Plasmodium. This Plasmodium infect red blood cells and the vector that trasmites it is the Anopheles mosquitoe. In this disease, red blood cells can have severe damage in different organs because of the hemolysis.
Toxoplasmosis is a disease caused by the protozoan Toxoplasma gondii. The main vector of them are domestic cats. When cats are infected, T. gondii oocysts is found in their feces and it can spread to humans. This disease is generally asymptomatic, except when the patient has AIDS or in pregnancy, which can be very dangerous and fatal.
Chagas disease, or American trypanosomiasis is caused by protozoan Trypanosoma cruzi and is generally transmitted to people thanks to the feces of triatomine bugs. Some of the acute symptoms include fever, vomiting, headache, and in severe cases people can develop a chronic disease. In the worst cases it can produce flaccid cardiomegaly (enlargement of the heart) leading to heart failure and death.
If a person had not drunk any water for 8 hours before collecting a sample, would you expect his/her urine to have a high or low specific gravity? Why?
Answer:
The person’s urine will have a high specific gravity
Explanation:
A high specific gravity is characterized by an increased concentration of solutes in the urine of am individual. A low specific gravity is characterized by a low or decreased concentration of the solutes.This is usually due to dehydration as a result of environmental conditions or tedious physical activities.
This explains why a person who had not drank any water for 8 hours and is dehydrated before collecting a sample is thought to have a urine with a high specific gravity
HEEELLLPPP PLSS!!! Compare and contrast open, closed, and isolated systems. Be sure to discuss the exchange of energy and exchange of matter, and provide at least one example of each.
Answer:
See the answer below
Explanation:
An open system is a type of thermodynamic system in which energy and matter are being exchanged between the system and the surrounding. It is like boiling soup in an open pot. The opening allows for the addition of materials (matters) into the soup and energy is exchanged through the heating. A good example is found in biological organisms. They consume matters and exchange energy with the environment by carrying out work.
A closed system is a type of system in which there is no exchange of matter between it and the environment. However, there is an exchange of energy. It is like boiling water in a closed pot. Nothing can be added into the pot due to the closure but energy can be transferred through the heating of the pot.
An isolated system allows for neither energy nor matter exchange with the surrounding. It is like a closed food warmer that allows for nothing to enter or leaves it.
Answer: Open systems are energy that can be transferred between the system and its surroundings. Close systems are systems that do not transferred to its surroundings. Isolated systems is a thermodynamic system which cannot exchange either energy or matter from outside its boundaries of the system.
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Which structures are highlighted? Which structures are highlighted? pulmonary arterioles alveoli bronchioles pulmonary capillaries
Hello. You forgot to put the image that complements this question. The image is attached below:
Answer:
pulmonary arterioles
Explanation:
Pulmonary arterioles are small blood vessels located in the lung. They appear as branches of the major arteries and have the main function of releasing blood from capillaries, in addition to regulating blood flow and peripheral blood pressure in capillaries.
It is important to note that arterioles are very small in size, which facilitates their functions to be performed efficiently and quickly.
Explain why it is necessary to include only one chain-terminating/synthesis-terminating nucleotide in each well of the electrophoresis instrument.
Answer:
Explanation:
Generally for the formation of phosphosdiester bond between two nucleotide molecules 3'-OH group is needed between the sugar molecule of one nucleotide and the OH group of the sugar present in the other nucleotide above it. However,in the single chain terminating molecule The 3'-OH is lacking.
Hence,DNA polymerace enzyme(which catalysis DNA replication) will not be able to elongate the DNA molecules, through replications with the addition of di-deoxynucleotidetriphosphates (ddNTP). Thus inhibiting replication and therefore chain terminations,
