Answer:
The fluoride is what helps you avoid cavities
Explanation:
water fluoridation as safe and effective in preventing tooth decay for both children and adults
describe classification as a work in progress discuss the characteristics of the three domains: Bacteria, Archaea, and Eukarya describe classification by cladistics summarize how molecular evidence reveals species relatedness identify the structures and shapes of viruses describe different types of viral infections
Answer:
Bacteria, Archaea, and Eukarya represent the three domains of life by which all living organisms are classified. This type of classification was coined by Carl Woese et al. (1990). Archaea and Bacteria represent different domains because Archaea is considered to have the evolutionary oldest phenotypic features, while Bacteria species have diacyl glycerol diester lipids in their membranes. On the other hand, the Eucarya domain is composed of organisms that possess a nuclear envelope (membrane).
Cladistics is a biological method used to classify organisms into groups named 'clades'. In this type of classification, organisms are categorized according to the most recent common ancestor. In this regard, it is possible to find the most recent common ancestor by using nucleotide differences between taxa.
Viruses can be classified in a similar manner to the cellular organisms above described. Viruses are categorized according to morphological features, type of nucleic acid (DNA or RNA) by which they are composed, mode of replication, host organisms, etc. Viruses may also be classified according to the type of disease that they cause. There are viruses that cause chickenpox, rabies, influenza, old sores, Ebola, AIDS (HIV), Severe acute respiratory syndromes (SARS), etc.
Describe classification as a work in progress
Since it reflects the most current understanding of how living things are related, new discoveries can change the way living things are classified also something is always changing.
Discuss the characteristics of the three domains: Bacteria, Archaea, and Eukarya
Bacteria includes common bacteria, Eukarya includes the four kingdoms: plants, animals, fungi, and protists. Archaea includes some of the oldest organisms on the planet.
Describe classification by cladistics
Cladistics depict hypothesis about how organisms are related based n their ancestors and descendants.
Summarize how molecular evidence reveals species relatedness
they are classified by DNA now instead of physical features.
Identify the structures and shapes of viruses
the shape can be helical,envelope,icosahedral,complex.
Describe different types of viral infections
lytic infection: virus enters the host cell, replicates copies, and destroys the cell to get out and spread to others/ Lysogenic infection: virus incorporates its DNA into the DNA of the cell. They both attach to host cells and use the cells resources to replicate genetic materials and parts.
Which refers to the process of going against the natural flow of heat and moving thermal energy from a low
temperature to a high temperature?
radiation
refrigeration
heating
O conduction
Answer:
conduction
Explanation:
Conduction is the process by which heat energy is transmitted through collisions between neighboring atoms or molecules. ... These vibrating molecules collide with their neighboring molecules, making them also vibrate faster. As these molecules collide, thermal energy is transferred via conduction to the rest of the pan.
Answer:
conduction
Explanation:
I got it right
What protective items should you wear when using benedicts solution?
Answer:
Hey there!
You should wear gloves and safety goggles when using benedicts solution.
Let me know if this helps :)
If a cell has 24 pairs of chromosomes in its diploid state, how many
chromosomes will it have after Meiosis 2?
A. 12
B. 24
C.48
D. 6
Answer:
option A is correct that is 12
Explanation:
meiosis occur in two phases in first phase DNA replication occur and amount of DNA become doubled without any change in the chromosome number and two daughter cell (each 2 n)are formed.
now in stage 2 each daughter cell undergoes mitosis with the formation of two cells with half chromosomes(n)
now 2n=24
n=24/2 =12
after meiosis stage 1...........two daughter cell each with 24 chromosomes
stage 2 .............each daughter cell form two grand daughter cell each with 12 chromosomes
net result.......4 daughter cell each with 12 chromosome(assuming cell as a diploid cell)
If a cell has 24 chromosomes before cell division then the daughter cell resulting from the mitotic division will have 24 chromosomes while the daughter cell resulting from the meiotic division will contain 12 chromosomes each.
The answer is option A.
What are meiotic and mitotic cell divisions?There are sorts of cell departments: mitosis and meiosis. most of the time whilst humans discuss “cellular division,” they suggest mitosis, the procedure of making new frame cells. Meiosis is the sort of cell division that creates egg and sperm cells. Mitosis is an essential technique for lifestyles.
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brain is considered as the centre of all senses, why ?
Answer:
the brain transfers and receives all signals from different parts of the body and controls what we do. it stimulates all our moves.
if something we touch is hot the brain will receive signals from the sensory cells in the skin, it'll tell us to move away, we'll move our hand away as a reaction.
Explanation:
11. The governments of many countries have regulations
that are designed to prevent the accidental
introduction of nonnative insects into their countries.
This is because, in these new habitats, the nonnative
insects might
1) become food for birds
2) not survive a cold winter
3) not have natural predators
4) add to the biodiversity
Answer:
The answer is 3. Not have natural predators.
Explanation:
Nonnative insects in new habitats mean that there are no predators there that eat them. This means that choice 1 will be eliminated. Now choice 2 also isn't it since if the insects do not survive a cold winter, there wouldn't be any nonnative insects in the habitats, causing no need to have strict regulations. Between choices 3 and 4, 4 doesn't make any sense. If it adds to a habitat's biodiversity, the ecosystem will benefit from it. However, the nonnative insects will harm the ecosystem, causing choice 4 to be eliminated. This means that only choice 3 is left. Choice 3 also makes sense since the nonnative species are also invasive species, having no natural predators in the new habitat. So, the answer is 3. Not have natural predators.
In a cladogram (a type of phylogenetic tree), clades are groups of related organisms. In the past, phylogenetic lists built clades using the idea of parsimony, that the pattern that uses the fewest evolutionary changes is the most likely to be correct. Today, with the use of computers and DNA sequences, the explanation that is thought to be the best is ___________ .
Answer:
one with the fewest number of genetic differences in the nucleotide sequence.
Explanation:
A cladogram is a diagram capable of showing the relationships among different species and/or group of organisms. In a cladogram, the root indicates the common ancestor, while internal nodes represent the common ancestors of each group. In consequence, this diagram can be used to establish evolutionary relationships in which the start branch points represent common ancestors shared by the organisms found in the 'branches'. Nonetheless, the length of the branches in the cladogram does not represent evolutionary distances among groups. In recent years, cladograms based on DNA sequencing data have been combined with morphological data to establish evolutionary relationships among species.
Discuss how the idea of vertical farming reflects the role of science in society.
Answer:
average global food prices have gone up by 2.6 percent annually in the past two decades. if that trend continues , not only does it threaten a baseline quality of life as more disposable income goes toward.Vertical farming is the practice of growing local crops like fruits and vegetables with minimal resources by using high technological methods in a controlled environment.
Why vertical farming is important?It has been said to be the future of agriculture in the UAE since they huge amount of goods and have to find ways to be self sustaining by boosting local production. Apart from being self sustaining, they also aim to provide safe and nutritious food.
The vertical garden is an agriculture concept for growing plants inside buildings or multi-story skyscrapers, often called farmscrapers, a term derived from the English skyscraper. In these buildings, which would function as large greenhouses, agriculture involves the use of technologies such as hydroponics to aid in plant growth. Some projects include the practice of livestock (especially poultry) on the lower floors.
Therefore, Vertical farming is the practice of growing local crops like fruits and vegetables with minimal resources by using high technological methods in a controlled environment.
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Uracil pairs with
O any nitrogen base
O uracil.
O adenine.
O thymine.
Answer: adenine
Explanation:
Which component of physical fitness is skill related? A.Flexibility B.cardiorespiratory C.muscular strength D.agility
Answer:
D.agility
Explanation:
D.agility
Answer:
D Agility
Explanation:
physical fitness components related to skills, including: explosive power, speed, agility, coordination, speed, reaction and balance.
Which of the following is a testable hypothesis?
a. Roses are more beautiful than violets.
b. A plant needs at least five hours of sunlight per day to grow.
c. I've cream is delicious.
d. Humans will someday land on Mars.
Answer:
B. because it's something u can actually do it, and it's more reasonable
Explanation:
an example for a hypothesis could be, If a gets at least 5 hours of sunlight per day, then it will grow. I hope this helps you :)
Question 3 of 10
Which of the following is a function performed by a detrivore?
A. Producing oxygen from sunlight
B. Moving nutrients into the soil
C. Hunting prey
D. Protecting prey from predators
Answer:
B. Moving nutrients into the soil
Explanation:
Detritivorous include millipedes, springtails, woodlice, dung flies, slugs, many terrestrial worms, sea stars, sea cucumbers, fiddler crabs, and some sedentary polychaetes such as worms of the family Terebellidae. All of which as you know help move nutrients to the soil.
Hope this helps, and have a good day! :)
Answer:
B. Moving nutrients into the soil.
Explanation:
A.P.E.X
Describe the direction of DNA replication. Why is that important?
Answer:
DNA replication is the process by that DNA make a copy to the cell division.
Explanation:
DNA replication is the double structure to the DNA molecule,it is biological process.DNA replication molecule the serve that template for the production to referred conservative replication.DNA replication occurs living the biological property of division and they performed complementary stand.DNA replication to that begin the specific location and origins in the genome, and growing from the origin.DNA replication is performed to the outside and artificially to the cell,in the DNA molecule.DNA replication is single strand by the DNA chain of nucleotide function, DNA contain the sugar .DNA replication is the basis of single strand to 3 prime and 5 prime end, these refer to the carbon atom in the chain attaches.DNA replication allow the strand to the one another strand to used in partner strand.DNA replication is to matched in the template strand at one time with the creation of bonds,they high energy bonds.Introduction to biochemistry mastery test
Answer:
Explanation: DescriptionGRE Subject Biochemistry, Cell and Molecular Biology was a standardized exam provided by ETS that was discontinued in December 2016. It is a paper-based exam and there are no computer-based versions of it. ETS places this exam three times per year: once in April, once in October and once in November.
If capeland switches from producing 0 watermelons to producing 18 million tons of watermelons, what does it give up?
Answer:
Attached to this solution is an image of the complete question and data.
The correct answer is:
6 million pairs of shoes
Explanation:
From the diagram attached to this answer, the following data can be gotten:
Watermelons shoes
(Millions of tonnes) (Millions of pairs)
0 15
8 14
14 12
18 9
20 5
21 0
From the pattern of the data shown above, we notice that as the production of one commodity increases, the other is given up (decreases)
Therefore, to find how much shoes are given up if Capeland switches from 0 watermelons to 18 million tons of watermelon, we will find the difference between the number of shoes produced at 0 and at 18 million tons of watermelon
at 0 watermelon; shoes = 15 million pairs
at 18 million tons of watermelon; shoes = 9 million pairs
Therefore, number of shoes given up = 15 - 9 = 6 million pairs
Hence, 6 million pairs of shoes are given up tp increase production of watermelon from 0 to 18 million tons
Which statement most accurately describes what the medicine bag symbolizes to Martin’s grandpa? It symbolizes his connection to his family members and his way of life. It symbolizes his hope that Martin will one day live on the reservation. It symbolizes the sacred dream he had during his vision quest. It symbolizes the deer that his father had killed long ago.
Answer:
A
Explanation: family members
Answer:
A
Explanation:
What are two ways the excretory system helps the body maintain homeostasis?
Answer:
1.Osmoregulation
2.Thermoregulation
Explanation:
1.Osmoregulation is the maintenance of constant amount of water in the body of an organism.The kidney is responsible for this phenomenon as in it has a nephron in which at a particular part of the nephron,i.e the conducting tube which sites a hormone called the anti diuretic hormone which makes the walls of the conducting tube permeable to allow the movement of water from the urea back into the body before it is transferred into the bladder for to be released into the external environment.
2.Thermoregulation involves the maintenance of heat in the body of an organism.The skin is responsible for this process.It has hairs which lie on the surface of the skin to loose heat to the external environment during the hot days and also stands on the surface of the skin which trap a film of air on the skin surface to prevent heat loss in the cold days.
I HOPE IT'S OK?
Answer:
The kidneys control the amount of water, ions, and other substances in the blood by excreting more or less of them in urine. The kidneys also secrete hormones that help maintain homeostasis.
Explanation:
Which statement describes an interaction between the biosphere and the atmosphere that is related to photosynthesis? During photosynthesis, plant roots take in water from soil. During photosynthesis, plants take in carbon dioxide from the air. Through photosynthesis, energy stored in plants is released into the air. Through photosynthesis, energy stored in plants is transferred to humans who eat them
Answer:
Option B on edge 2020
Explanation:
The correct statement that relates the interaction between the biosphere and atmosphere during photosynthesis is ; ( B )
During photosynthesis, plants take in carbon dioxide from the air ( B )Photosynthesis is process whereby plants and algae ( green ) make use of sunlight and water in the presence of carbon dioxide obtained from the atmosphere to create their food while giving out oxygen back to the atmosphere.
Energy stored/created in plants are not released to animals through the air but Carbon dioxide present in the atmosphere is take into the biosphere by plants during photosynthesis.
Hence we can conclude that During photosynthesis plants take in carbon dioxide from the air .
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Natural selection can, through common descent, produce closely related species that have similarities due to their shared ancestry. Natural selection can also, through convergent evolution, lead to distantly related species appearing very similar. Identify which examples reflect common descent and which reflect convergence.
Complete Question:
Natural selection can, through common descent, produce closely related species that have similarities due to their shared ancestry. Natural selection can also, through convergent evolution, lead to distantly related species appearing very similar. Identify which examples reflect common descent and which reflect convergence.
Tree-dwelling primates have prehensile tails for gripping branches. Tree-dwelling opossums also have prehensile tails. Many birds and some kinds of bats that feed on plant nectar all have long flexible tongues. Primates use opposable thumbs to help climb. New World monkeys also have prehensile tails, but Old World monkeys do not. Marsupial mammals throughout Australia show a wide diversity of forms that reflect the habitats in which they live. Hawaiian honeycreepers, with their elongated, nectar-sipping bills, all evolved from a finch-like ancestor.Answer and Explanation:
Tree-dwelling primates have prehensile tails for gripping branches. Considering recent ancestors, the prehensile tail trait can be considered as a convergence example that occurred among different groups. But we can also think about it as a common descent if we consider the farthest primates ancestor. Although still controversial, Plesidiapsi might be considered a common ancestor of primates, that evolved from a ree-dwelling mammal with a long tail. It is believed that this animal used to live in trees. Tree-dwelling opossums also have prehensile tails. Convergence. Many birds and some kinds of bats that feed on plant nectar all have long flexible tongues. Convergence. These are two groups that are very separated from each other, and they developed different traits according to their needs separately. Some of the species of these two groups adapted to feed on the same plant so they needed to develop the same characteristic to obtain nectar.Primates use opposable thumbs to help climb. New World monkeys also have prehensile tails, but Old World monkeys do not. Common descent . The common ancestor had a prehensile tail, some of the descendants developed the tail but some others did not.Marsupial mammals throughout Australia show a wide diversity of forms that reflect the habitats in which they live. Common descent . Hawaiian honeycreepers, with their elongated, nectar-sipping bills, all evolved from a finch-like ancestor. Common descent . They all look like the finch-like ancestor.3. Which plants are usually the first to grow during secondary succession?
A ferns
Blichens
Cweeds
D trees
Answer:
ferns
Explanation:
these are alsi known as conifers which require a great amount if light
Im not a science student just trying beans I guess
The permeability of ______ in the second coiled tubule of the nephron is controlled by _______.
Answer:
distal tubule, the concentration of ADH
Explanation:
Nephron is the functional unit of kidney. Nephron undergo reabsorption and secretion along different part.
The permeability of distal tubule to water in the second coiled tubule of the nephron is controlled by the concentration of ADH. The concentartion of ADH controls the degree of dilution or urine concentration. High ADH level makes , tubules permeable to water while the absence of ADH makes them impermeable to water.
Hence, the correct answers for blanks are distal tubule and the concentration of ADH.
Answer:
The distal tubule, the concentration of ADH.
Tara placed a grape in a solution, after sometime she noticed that the grape started to shrink.
a. Name the solution and explain.
b. Then Tara placed the raisin in a solution and noticed it started to swell up. Name the solution and explain
Answer:
a. Hypertonic solution
b. Hypotonic solution
Explanation:
There are basically 3 types of solutions in biology,
1) Isotonic-Same concentration of solute and solvent inside the grape and in the solution.
2)Hypotonic solution-More concentration of solvent in the solution than in the grape.
3)Hypertonic solution-More concentration of solvent in the grape than in the solution.
Now,
a. Tara had kept the grape in a hypertonic solution. The solvent will start draining from the grape to equalize the concentrations of solvent inside and outside. So, the grape shrank due to loss of water.
b. Tara kept it in a hypotonic solution. The solvent will start entering the grape to equalize the concentrations of solvent. So, the grape started swelling.
Please help!
Without the discovery of magnetic reversals recorded on the ocean floor, scientists
A. could not confirm the usefulness of sonar
B. could destroy the hypothesis of continental drift
C. could not provide a mechanism for moving continents
D. could explain how the seafloor was being destroyed
Answer:
C. could not provide a mechanism for moving continents
Explanation:
Without the discovery of magnetic reversals recorded on the ocean floor, scientists could not provide a mechanism for moving continents.
Magnetic reversals are responsible for geological shifts and depend on the distribution of tectonic plates that causes movements of continents.
Asymmetric movement of tectonic plates leads to movement of continents and the degree of asymmetry varies with the same rythm of the magnetic reversal rate.
Hence, discovery of magnetic reversals are important to identify the mechanism for moving continents.
The study of a living being is called biology.
The correct answer is C.
Without the discovery of magnetic reversals recorded on the ocean floor, scientists could not provide a mechanism for moving continents because magnetic reversals are responsible for geological shifts and depend on the distribution of tectonic plates that causes movements of continents.
Asymmetric movement of tectonic plates leads to movement of continents and the degree of asymmetry varies with the same rhythm of the magnetic reversal rate. Therefore the discovery of magnetic reversals is important to identify the mechanism for moving continents.
Hence, the correct answer is C that it could not provide a mechanism for moving continents.
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When CFCs are exposed to high levels of UV radiation, what occurs? A. The compound breaks down into nitric oxide and ozone. B. All of these C. A chlorine breaks off and forms a free radical. D. They become ionized and stick together in clumps that become part of smog.
Answer:
C. A chlorine breaks off and forms a free radical
Explanation:
When CFCs are exposed to high levels of UV radiation in the atmosphere, the CFC molecule breaks into chlorine and forms free radicals.
These free chlorine radicals then reacts with ozone molecules and breaks the ozone atom (O3) to form chlorine monoxide and oxygen (O2) molecule.
CFCs are main cause of ozone depletion in the atmosphere.
Hence, the correct option is "C".
Please help!
A. summer
B. autumn
C. winter
D. spring
Which of the following is not a function of the cell membrane? A. Keeping all the parts of a cell inside B. Helping a cell to alter its shape C. Allow prokaryotes to use cell division D. A place for cellular reactions to take place
Answer:
D. A place for cellular reactions to take place
Explanation:
the cell membrane perfomes divers functions ranging from the Keeping of all the parts of a cell inside, helping cell to alter its shape, allowing prokaryotes to use cell division. Most of the cell reactions happens in the Mitochondrion, not the CELL MEMBRANE
A place for cellular reactions to take place is not true about cell membrane .
What are the function of cell membrane ?Cell membrane forms barrier keeping the constituents of the cell in and unwanted substances out and to be a gate allowing transport into the cell of essential nutrients and movement from the cell of waste products.
What is cell membrane?The cell membrane, also called the plasma membrane, is found in all cells and separates the interior of the cell from the outside environment.
Hence, D is correct option
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A group of coordinately regulated structural genes with related metabolic functions, plus the promoter and operator sites that control their transcription, is called a/an ___________.
Answer:
They are called promoter and regulatory genes.
Explanation:
There are different genes responsible for regulating transcription:
These are the inhibitors, promoters and regulators.
Regulatory genes are in charge of regulating that promoter or inhibitor genes remain intact or do not present mutations.
Promoter genes promote cell replication, hence transcription.
In the case of malignant or benign neoplasms, there must be yes or if the affection of a regulatory gene plus the affection of an inhibitory or promoter gene.
Ergogenic aids can be useful in some circumstances, some are possibly useful but still under study, and still others are downright dangerous and illegal. 1. human growth hormone.
2. anabolic steroids
3. creatine
4. caffeine
5. beta-hydroxy-beta methylbutyric acid (HMB)
6. branched-chain amino acidsA. The use of_____may improve performance for those who undertake repeated bursts of activity, such as in sprinting or weightlifting.B. Consuming small amounts of_______can increase menta alertness. C. Consuming______may enhance muscle recovery after intense physical activity. D. An ergogenic aid that increases muscle mass but may also cause uncontrolled growth of the heart or other organs and is banned by the International Olympic Committee is______.
Answer:
Using beta-hydroxy-beta methylbutyric acid (HMB) can improve performance for those who perform explosive repetitions of activity, such as running or lifting weights. Consuming small amounts of caffeine can increase mint alertness. C. The consumption of branched-chain amino acids and creatine can improve muscle recovery after intense physical activity. D. An ergogenic aid that increases muscle mass but can also cause uncontrolled growth of the heart or other organs and is prohibited by the International Olympic Committee: anabolic steroids.
Explanation:
In the answer I leave you the text with the blanks completed ... It is also important that you know that amino acids are important for the formation of muscle mass and its recovery, in addition to creatinine.
On the other hand, these supplements are administered in people who have high performance in sports, and accompanied by a good diet and specific diet, otherwise they will not work.
Anabolics are chemical structures that promote energy reserves and anabolism for muscle tissue hypertrophy, but they do not have a selective effect on the skeletal muscle, but rather affect other parts of the body, that is why they are risky, cause heart failure, cardiovascular, liver, kidney, and even possible alterations of the gallbladder.
Raman’s teacher taught about changes that take place during Adolescence
period in the class today. Which of the following change take place in girls
during Adolescence period?
a) Increase in breast size b) Menstruation
c) Growth of hair in genital area d) All of the above
Answer:
d) All of the above
Explanation:
Adolescence is the period which is following the onset of puberty in a young person and turns them into an adult.
During adolescence, both males and females undergo several physical changes. Some of the physical changes in the girls' or female's body include increase in breast size, menstruation, and growth of genital hair.
Hence, the correct answer is "d".
What would happen if sex cells were diploid?
A. They would require 2 other gametes to fuse with.
B. When they fused, the resulting embryo would have double the amount of DNA it should
have.
C. When they fused, the resulting embryo would have half the amount of DNA it should
have.
D. Sex cells are diploid.
If the gametes will be diploid then on fusing the resulting embryo would have double the amount of DNA it should have. The correct option is B.
What are gametes?A gamete is an animal or plant procreative cell. Female gametes are known as ova or egg cells in animals, while male gametes are known as sperm.
Ova and sperm are haploid cells, with only one copy of each chromosome in each cell. A sperm and an ovum combine during fertilization to form a new diploid organism.
As in case of diploid gamete, the embryo will have double amount of DNA than normal and will create defect.
Thus, the correct option is B.
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