Answer:
option C is true statement
Explanation:
both virus and bacteria are disease causing agent and are microscopic and are invisible to naked eye
A sudden change in chromosomes or gene?
Answer:
The answer is CHROMOSOMAL MUTATION.
Explanation:
This is a mutation involving a long segment of DNA.
1. In what ways you could increase the rate of reaction as it is taking place in the
image below?
Answer:
There are 4 methods by which you can increase the rate of a reaction:
Explanation:
Increase the concentration of a reactant.
Increase the temperature of the reactants.
Increase the surface area of a reactant.
Add a catalyst to the reaction.
Increase the concentration of a reactant, temperature, surface area of a reactant, addition of catalyst could increase the rate of reaction .
what increases rate of chemical reaction ?higher concentration of reactants causes more collisions leads to increase the rate of the reaction.
Temperature increase can lead to increase in the reaction rate.
Changing the pressure is one factor increases the reaction rate.
The medium of the reaction can affect the rate reaction go faster.
The powdered form of solid reactant can increase the surface area, will lead to faster the reaction.
Catalysts by lowering the activation energy increase the rate of a chemical reaction.
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what is a disadvantage of a 2D model of the digestive system
Answer:
Less biological relevant model and reduce cell to cell interaction.
Explanation:
The two main disadvantages of a 2D model of the digestive system is that it is less biological relevant model and reduce cell to cell interaction. The 2D model does not show high resemblance to reality and this model also fail to show the interactions of two cell surfaces with each other. In short, this model, does not give us complete knowledge about any biological system.
Answer:
Less biological relevant model and reduce cell to cell interaction.
Explanation:
8.
Giving a dog a treat after telling it to roll over
What is he doing?
Answer:
Obeying you because you gave him the treat.
*30 points* Purebred tall pea plants look the same as tall, heterozygous pea plants. Formulate a pollination experiment to identify whether a tall pea plant is purebred or heterozygous
Test crosses are used to determine the genotype of an individual that expresses a dominant trait by crossing this individual which an homozygous recessive individual expressing the recessive trait. The pollination experiment could be a test cross.
What is a test cross?
Test crosses are experimental crosses carried out to determine the genotype of one of the involved individuals.
Test crosses include a homozygous recessive individual and another individual of an unknown genotype whose phenotype we already recognize.
The main goal is to know if the individual of the unknown genotype is a heterozygous or a homozygous dominant individual.
If it is heterozygous,
→ 50% of the progeny will be heterozygous and express the dominant phenotype,
→ 50% homozygous recessive expressing the recessive phenotype.
If it is homozygous, the whole progeny will be heterozygous and will express the dominant trait.
In the exposed example, we have two traits: tall and short.
We will assume a diallelic gene codes for this feature, and expresses complete dominance.
Dominant allele T codes for tallRecessive allele t codes for shortTo determine if tall plants are homozygous dominant or heterozygous we will separate them and produce controlled test crosses with short plants, which are homozygous recessive.
The test cross between homozygous recessive plants and homozygous dominant plants will only produce tall plants.
Parentals) tt x TT
Gametes) t t T T
Punnett square) T T
t Tt Tt
t Tt Tt
F1) 100% heterozygous individuals, expressing the dominant tall phenotype.
The test cross between homozygous recessive plants and heterozygous plants will produce tall and short plants.
Parentals) tt x Tt
Gametes) t t T t
Punnett square) T t
t Tt tt
t Tt tt
F1) 50% heterozygous individuals Tt, expressing the dominant tall phenotype.
50% homozygous recessive plants tt, expressing the recessive short phenotype.
In conclusion, the pollination experiment to identify whether a tall pea plant is purebred or heterozygous is a test cross.
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Evidence without ________ increases its reliability. (2 points) bias question repetition replication
Answer:
I would say bias.
Explanation:
bias: prejudice in favour of or against one thing, person, or group compared with another, usually in a way considered to be unfair.
"there was evidence of bias against foreign applicants"
When you are being biased, you are putting your own opinion into what you are doing or you are trying to persuade the person hearing you, reading what you wrote.
Therefore, Evidence without bias increases its reliability.
One example of qualitative data that can be collected when using a microscope
Answer:
Qualitative and quantitative are two research technique that used in microbiology to collect the data information. These are very useful techniques.
Explanation:
There are several technique has been used in microbiology in collecting data. There are qualitative and quantitative collection of data. Qualitative data tells about data intent in yes or no form. The other techniques such as quantitative technique which provide information about the numerical value of data.
Qualitative technique is used in research would collect data on growth of the bacterial sample on the solid growth of the sample. It is used to assess whether the bacteria in the data is living or dead. It reveals the wealth of the qualitative information of data. The observation of microorganism in microscope get information whether the organism is in propelled motion or its dead.
Julie: "Specialized cells in multi-cellular organisms are organized into tissues
and organs that perform specialized functions. The human body is made up
entirely of a collection of trillions of cells and things made from cells."
Kyle: “All cells look alike and specialized cells in multicellular organisms are
organized into tissues and organs that perform specialized functions.
Jennifer: “The human body is a collection of trillions of cells and things made
from cells contained inside an outer covering and inner coverings that contain
organs."
Which student do you think best describes the human body? On your own
paper, explain your answer write your answer in the next slide
Answer:
Jennifer
Explanation:
I think Jenifer because She The human body is a collection of trillions of cells and things made
from cells contained inside an outer covering and inner coverings that contain
organs. That is my opinion
1. There is only one way to accurately study the world around us?
Answer:
The correct answer would be : the scientific method.
Explanation:
The study of world around each and every organism is known as science. Science or the world around us can only study by the scientific method. Scientific method includes the observation of the world and forming question on the basis of these observation which is followed by investigations and experiments.
The observation and possible answer of the question can be check accurately that was formed with the help of data carried out in investigation.
Thus, the correct answer would be : the scientific method.
whats pneomonoultramicroscopicvolcanoisis?
Answer:
An invented long word said to mean a lung disease caused by inhaling very fine ash and sand dust.
Explanation:
Answer:
Disease of lungs caused by inhaling very fine particles of metallic or crystalline silica dust. The sharp particles lacerate the lining of the lungs, causing victim to leak air from their lungs while simultaneously bleeding into their lung cavity.
It is also said to be the longest word in the dictionary.
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"Replication forks from the same origin of replication extend __________. __________ DNA strand is used as template for the leading strand at one fork and for the lagging strand at the second fork. New DNA is synthesized from 5' to 3' on the __________."
Answer:
Explanation:
Replication forks from the same origin of replication extend from the beginning of the strand to the end where the enzyme helicase helps to move the replication fork unwinding DNA double helix structure by breaking the hydrogen bonds between the Nitrogenous bases.
DNA strand is used as template for the leading strand at one fork and for the lagging strand at the second fork. New DNA is synthesized from 5' to 3' on the leading strand.
The strand is made continuously forward in the direction of the replication fork while the other strand is made in 3' to 5' direction and been referred to as ozazaki fragments.
2. Give ONE possible reason, biotic or abiotic, why the population decreased in 1990
after it had reached its carrying capacity.
Answer:
availability of resources.
Explanation:
Availability of resources is abiotic factor which is responsible for the decrease in population in 1990 because when the population reaches its carrying capacity so the organisms compete with each other and due to limited resources such as food etc the decrease occurs in population. Infection is also occurs when there is high population due to which death occurs and population of organism decreases.
Tetralogy of Fallot is characterized by which of the following?
a. A ventricular septal defect
b. Right ventricular hypertrophy
c. Transposition of the great arteries
d. Obstructed right ventricular outflow
e. An aorta positioned above the ventricular septal opening
Answer:
a. A ventricular septal defect
b. Right ventricular hypertrophy
d. Obstructed right ventricular outflow
e. An aorta positioned above the ventricular septal opening
Explanation:
Tetralogy of Fallot is a combination of four heart defects as the name ‘Tetra’ depicts. The four heart defects include A ventricular septal defect ,Right ventricular hypertrophy ,Obstructed right ventricular outflow and An aorta positioned above the ventricular septal opening.
It usually occurs and discovered at birth and it involves the process whereby the heart isn’t able to pump oxygen-rich blood to other parts of the body. Instead the blood are usually oxygen deficient and could cause a variety of health complications.
which will have the GREATEST impact on kinetic energy
Answer: the speed of the body
Explanation: kinetic energy is equal to the the half of the multiple of mass and speed so the increasing and decreasing of the speed has a greatest impact on the kinetic energy.
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The kinetic energy of a body depends on its mass and velocity but velocity has the greatest impact on kinetic energy.
What is kinetic energy?The energy that an object has as a result of motion is known as kinetic energy. It is described as the effort required to move a mass-determined body from rest to the indicated velocity. The SI unit of kinetic energy is the joule (J).
Radiant, thermal, acoustic, electrical, and mechanical kinetic energies are the basic categories. The capacity to perform work is kinetic energy's most significant quality. Kinetic energy can be increased by increasing mass and velocity and can be decreased by decreasing them.
Kinetic energy depends on both the mass and velocity of the body but it is most affected by velocity.
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Which of the following would cause a decrease in the number of species in an ecosystem?
a decreasing the number of predators
b increasing the food supply
c increasing the produceſ population
d introducing a competing species
Answer:
d) introducing a competing species.
Explanation:
Competition refers to a dynamic partnership in which various species or populations in the environment concurrently seek to utilize the same available resources. Organisms in an ecosystem compete for the same limited nutrients and in the process, one ultimately got an edge over the other. because resources are limited in nature, the population of one species decreases at the expense of the survival of the other.
Write an “O” next to statements that are examples of Observations and an “I” next to those statements that are Inferences. _____ 1. Dark color houses heat up faster than light color houses. _____ 2. Our school colors are black, red, and white. _____ 3. Hot water will freeze faster than cold water. _____ 4. The screwdriver has an orange handle. _____ 5. The temperature is 72 degrees F. _____ 6. Sugar makes your reaction time faster. _____ 7. Girls have better short term memory than boys. _____ 8. There 11 players on the field. _____ 9. The team with the faster point guard will win the game. _____ 10. The pizza has 8 slices
Answer:
1: I
2: O
3: I
4: O
5: O
6: I
7: I
8: O
9: I
10: O
With your fragment now in an expression plasmid, you will need to check to ensure that the fragment is in the correct reading frame from the promoter so that a functional enzyme can be made. You will utilize the polymerase chain reaction (PCR) to amplify a section of the plasmid containing your insert so that it can be sequenced. PCR uses a DNA polymerase isolated from a hyperthermophilic bacterial species to synthesize a new DNA strand off a template strand of DNA. You are supplying a template in the form of the plasmid with the inserted fragment. PCR also uses the requirement of DNA polymerase to have a pre-existing primer with an open 3' end for new strand synthesis. You will provide the primers that will bind to specific DNA sequences before and after the inserted fragment and will act as boundaries for what part of the plasmid will be amplified. The resulting short, amplified fragments will be identical in base sequence to the original plasmid templates. Once PCR amplification is complete, you will have enough template fragments to send for DNA sequencing to ensure that you have inserted the genes correctly into the plasmid. Correct insertion will result in the production of an mRNA strand that will have the first gene codon in the correct reading frame for a working enzyme to be produced. Of the following components, which ones are required for the amplification of a specific section of DNA using the polymerase chain reaction? Select all that apply.
a. DNA primers
b. RNA polymerase
c. a strand of RNA to act as a template
d. DNA polymerase that is heat stable
Answer:
The correct answer is - a. DNA primers, and d. DNA polymerase that is heat stable.
Explanation:
In Polymerase chain reaction (PCR) there are many components are required in a overall process but there is two major components that are required for amplification of a specific section of DNA:
a. DNA primers- these are short and strands or sequence of ssDNA, a pair of these sequence acts as the starting site for a new strand which is used to hybridize with the sample DNA and mark the region of the DNA of interest to be amplified.
d. DNA polymerase that is heat stable- PCR technique involves various reaction that are performed at different temperatures. A thermophilic bacteria Thermus aquaticus is used to get this heat stable enzyme, Which lives in hot springs.
Thus, the correct answer is - a. DNA primers, and d. DNA polymerase that is heat stable.
Question 1 (1 mark)
Learning goal 1: Which of these statements about matter are
correct?
'Matter includes substances that take up space and have
mass
-Organisms need matter to grow
-Food, air and water are all types of matter
-The Sun provides a constant supply of matter for food
chains
Answer:
Matter includes substances that take up space and have mass.
Which of the following is/are example(s) of lymphocytes? Question 6 options: 1) antibodies 2) B-cells 3) T-Cells 4) T and B-cells
b) cuz(my instinct says so)
B cells and T cells are examples of lymphocytes. So the correct option is D.
What are lymphocytes?Lymphocytes are a kind of white blood cells that are an indispensable part of the immune system. The lymphocytes are produced by the bone marrow.
Most of the lymphocytes produced by the bone marrow enter the blood. The remaining lymphocytes enter the lymphatic system. The lymphatic system includes the tonsils, spleen, and lymph nodes.
B cells are formed from 25% of the new lymphocytes produced and the remaining 75% of cells result in the formation of the T cells.
The T cells and B cells are categorized into two types -
Effector cells are the cells that are activated by antigen simulation. Memory cells are the cells that remember the previous infections and work against them if they ever reenter the system.Thus B cells and T cells are both types of lymphocytes.
Therefore the correct option is D.
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Your instructor gives you an unknown organ for you to examine and identify through microscopy. What should you do first with the sample?
a) cut it into sections
b) examine it for artifacts
c) fix it with preservative
d) stain it to enhance contrast
Answer:
The correct answer would be : option C) fix it with preservatives.
Explanation:
In the histology, examination and identification of the sample requires various steps in order to examine the specimen or sample and identification. These steps must be performed in correct sequence.
The first step to examine a sample is to fix it in current phase so that there is no change occur during the examination. With the help of preservatives an individual can fix the sample to its current state or phase.
Thus, the correct answer is : option C) fix it with preservatives.
Answer:
Fix it with preservative
Explanation:
Preservation is the main cadaver for human bodies in educational settings. Preservation is the safe procedure for the body to take it safe from harm, decomposition and the destruction. The body can be put safe in a chemicals The most important chemical in which the body put safe is formaldehyde. But now these days, there is threat related to the chemical formaldehyde. Preservation means to put something safe from decomposition, destruction and harm. Conservation is called something put in preservation to be safe. Embalmment is like the treatment of something with the chemical.
what the scientific name of frog
Answer:
the answer is Anura.....
Answer:
anura ................
describe in your own words, the formation of our solar system.
Answer:
Explanation:
our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula—a spinning, swirling disk of material.
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Difference between inhalation and exhalation???
inhalation: inhaling air (breathing in)
exhalation: exhaling air (breathing out)
Explain the process of obtaining wool from
sheep.
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The hair of the body of wool yielding animals traps a lot of air spaces between the fibres. Since air is a poor conductor of heat this helps to keep us warm in winter season that's why woollen clothes are worn in winter.
Mainly the wool yielding animals are properly treated and taken care of and this pocess is known as rearing. The wool yielding animals are reared in areas with low rainfall Sheep is one of the most popular wool yielding animals and it has a lifespan of about 10 to 12 years.They eat grass and leaves. Reared shepp are also fed with a mixture of pulses, corn, jowar, Oil cakes and Minerals. In winter they are kept indoors and fed on dry fodder, leaves and grains.☀️ Then, They are sheared......Once the sheep develops a thick coat of hair it is shaved off for getting wool. The removal of wool from sheep is known as shearing. It is done manually with the large razor or with shearing machine. Shearing is usually done during the hot season.━━━━━━━━━━━━━━━━━━━━
1. Which of Hubble's findings supported the big bang theory? Circle all that apply. (3) a. Galaxies that are closest to ours are moving more quickly than those located farther away. b. Galaxies tend to move toward each other. c. There are billions of galaxies in the universe, not just one. d. The universe formed from a central point. e. Most galaxies in the universe are moving away from Earth.
Answer: The Universe formed at a central point :)
Explanation:
Answer:
Part B
Explanation:
Which statement is true regarding cystic fibrosis? It is autosomal-dominant. It affects endocrine glands. It is common in African Americans. It is the most common genetic disease in the United States.
Answer:
The correct answer is - It is the most common genetic disease in the United States.
Explanation:
Cystic fibrosis is the genetic disease that affects the several body system and organ such as lungs and digestive system. This hereditary disease is autosomal recessive.
It is not common in ethnic populations such as African Americans and Asian Americans while in white population of US it is a very common genetic disease as it occurs in one individual in every 2500 to 3500 white infants.
Thus, the correct answer is - It is the most common genetic disease in the United States.
Identify the properties of soil
Answer:
All soils contain mineral particles, organic matter, water and air. this may determine the soil's properties....like texture structure chemistry and colour...
Explanation:
this may not be the perfect explanation but hope you got the point ᵔᴥᵔ
Which removes carbon dioxide from the atmosphere, acting as a carbon
sink?
D. Formation of carbonates in the ocean.
(APEX)
Formation of carbonates in the ocean removes carbon dioxide from the atmosphere, acting as a carbon sink. Thus, the correct option is D.
What are the ways of carbon dioxide removal?
Carbon is stored on the planet in the following major sinks as organic molecules in living and dead organisms found in the biosphere, as the gas carbon dioxide in the atmosphere, as organic matter such as carbonates in soil and oceans, in the lithosphere as fossil fuels and sedimentary rock deposits such as limestone, dolomite.
The removal of carbon dioxide is essential because of continued high rates of global emissions. Since industrial revolution, carbon dioxide gas emissions have been building in the atmosphere, creating a warming layer of carbon pollution which is causing climate change.
Therefore, the correct option is D.
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In an aquatic ecosystem, the fishing of a particular fish species increased. This fish species is a secondary consumer in an energy pyramid. The fishing of the species
In an aquatic ecosystem, the fishing of a particular fish species increased. This fish species is a secondary consumer in an energy pyramid. The fishing of the species led to a decrease in its population. In which two ways will this affect the food web?
1 The higher levels in the pyramid will receive more energy.
2 The higher levels in the pyramid will receive less energy.
3 The lower levels in the pyramid will have less predation.
4 The higher levels in the pyramid will receive no energy at all.
5 The lower levels in the pyramid will receive less energy.
Answer:
2 and 3
Explanation:
Just look at a food pyramid and you will see. If there is more fishing of a fish species, that means the population will go down. This means that if the population of fish goes down, the levels in the energy pyramid below the fish will have less predation, since the anything above a level in the food pyramid will eat anything below it. Also, if there's less fish, that means that the higher levels in the pyramid will recieve less energy since there's less fish for them to eat
Answer:
The higher levels in the pyramid will receive less energy.
The lower levels in the pyramid will have less predation.
options 2 and 3
Explanation:
Reflect on what was discussed in the video. How would you complete these general sentence stems regarding the nature of science? Note: It’s important to remember that this video only mentions some components of the nature of science! The below sentence stems can contain more characteristics, which we encourage you to discuss and consider. Science can lead to the development of: . It’s important to know that science is:
Answer:
Science can lead to the development of important technologies to maintain and increase our quality of life.
It is important to know that science is a necessary evolutionary resource for the growth and advancement of a nation.
Explanation:
Science is the main responsible for the creation of any and all technology capable of maintaining or creating better levels of quality of life. Through these technologies, better treatments and cures for diseases are developed, better food distribution, better educational methods, better urban infrastructure, better and greater food production, new jobs, among other factors that are very important for the maintenance of life such as improvement of the elements that we already have.
It is important to note that science is responsible for the progress of a nation. Nations that adopt negative and anti-science stances are doomed to ostracism and will be weak, vulnerable and completely out of date.