Which field of biology primarily studies
disease-causing
organisms?
A. ecology
B. virology
C. taxonomy
D. "tree of life"
B. virology
Explanation:Virology is the scientific discipline concerned with the study of the biology of viruses and viral diseases, including the distribution, biochemistry, physiology, molecular biology, ecology, evolution and clinical aspects of viruses.
Which of the following best describes the function of the enzyme Catalase?
Question 2 options:
Catalase is a poison produced by cells that is broken down by hydrogen peroxide
Catalase is a protein that is used by cells to slow down poisonous chemical reactions.
Catalase breaks down poisonous hydrogen peroxide into water and oxygen gas.
Catalase puts together water and oxygen gas to make poisonous hydrogen peroxide.
Catalase breaks down poisonous hydrogen peroxide into water and oxygen gas.
Functions of catalase enzymeAll enzymes, including catalase, are proteinous in nature. All enzymes also have their substrates, and they are quite specific with them. An enzyme that acts on a particular substrate may not act on another.
Catalase is an enzyme whose substrate is hydrogen peroxide. In cells, catalase helps with the homeostasis of hydrogen peroxide. Once the chemical starts building up beyond a certain concentration threshold, catalase starts breaking it down.
Catalase is able to break down hydrogen peroxide into two components - water and oxygen gas.
Thus, the option that best describes the function of the enzyme catalase is the third option.
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Help fast
Timer on help help
Answer:
The down one I think So it's an correct answer hahaha
Answer:
-induction
-conduction
Explanation:
What is the activation energy of a reaction? (1 point)
O the amount of energy lost
O the amount of energy produced
O the maximum energy used by the reactants as the reaction proceeds
O the minimum energy required by the reactants for the reaction to proceed
Answer:
Explanation:
uyghy
What is the period of an ocean wave?
OA. The time it takes for two successive crests to pass a stationary
point
OB. The time it takes for one crest and the following trough to pass a
stationary point
OC. The distance between a crest and a trough
OD. The distance between two successive crests
The period of an ocean wave is option A. The time it takes for two successive crests to pass a stationary point.
The time period T is the time it takes one wavelength or two consecutive troughs (or crests or another wave reference factor) to bypass by using a fixed position.
A wave is a propagating dynamic disturbance of 1 or greater quantities. Waves can be periodic, in which case those quantities oscillate again and again about an equilibrium fee at a few frequencies. A wave is a disturbance in a medium that carries energy without a net motion of particles. it is able to take the shape of elastic deformation, a version of pressure, electric powered or magnetic intensity, electric ability, or temperature.
The period of a wave can be measured with the aid of selecting any time on the graph to be the initial time, and the time it takes to return to that position at the same time as heading inside the same route as the very last time.
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HELP DUE Now The ozone layer protects us from the harmful effects of which type of radiation?
infrared
ultraviolet
radio
microwave
Answer:
ultraviolet radiation
Explanation:
Answer:
ultraviolet
Explanation:
Where does protein production start and finish?
Answer:
In prokaryotes, it occurs in the cytoplasm. In eukaryotes, it initially occurs in the nucleus to create a transcript (mRNA) of the coding region of the DNA. The transcript leaves the nucleus and reaches the ribosomes for translation into a protein molecule with a specific sequence of amino acids.
Explanation:
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1. What is a dendrite?
A) It is a cell that sends signals to the central nervous system based on sensory input.
B) It is the part of a neuron that carries information to the cell body.
C) It is a cell that sends signals to the body to move.
D) It is the part of the neuron that carries information away from the cell body.
2. What is the term for changes in the internal or external environment that cause a response?
A) stimuli
B) signals
C) nerves
D) messages
3. How do signals move from a sensory neuron toward the brain?
A) The signal is sent through the part of the neuron that is in contact with the spinal cord.
B) Signals move from dendrite to dendrite towards the brain.
C) Interneurons help signals move from one neuron to another toward the spinal cord.
D) Motor neurons signal for the body to move the signal toward the brain.
4. What part of the nervous system is very well protected by bone?
A) central nervous system
B) interneurons
C) peripheral nervous system
D) sensory neurons
5. You see a mosquito land on your hand and swat at it. A signal passes through many parts of different neurons to make this happen. Which component of the nervous system is the last to be involved in this process?
A) dendrites in sensory neurons
B) axons in motor neurons
C) dendrites in motor neurons
D) axons in sensory neurons
Answer:
The definition of dendrite: a short branched extension of a nerve cell, along which impulses received from other cells at synapses are transmitted to the cell body.
For 1, the answer should be B, as it is a part of the neuron and spreads information throughout the body.
For 2, the answer is A: stimuli.
For 3, the answer is C: Interneurons help signals move from one neuron to another toward the spinal cord
Answer
dendrite is the special immune cell that is found all round your body( it means on ur tissues ) and it is responsible for the movement of information in our body to our nervous system so is means it involve cell
the function is to receive message from our brain not to send
Explanation:
so the only answer for ur question is
b) it is a neuron that carries information to the cell body
the cell body means for example a tire
i think it help u
During an experiment, you make an observation that the chemicals in a test tube went from clear and colorless to purple. What type of data is this?
A.Quantitative
B.Qualitative
The observation that the chemical in a test tube went from clear and colourless to purple, it shows that the data is B.Qualitative type.
Qualitative data is the descriptive and conceptual findings amassed thru questionnaires, interviews, or observation. reading qualitative statistics lets us discover thoughts and further give an explanation for quantitative effects. Qualitative statistics describe traits or characteristics. it's miles accrued using questionnaires, interviews, or remarks, and frequently appears in the narrative shape.
Quantitative facts are facts about numeric variables. Quantitative information refers to any information that may be quantified, counted, or measured, and given a numerical cost. Qualitative facts are descriptive in nature, expressed in phrases of language as opposed to numerical values.
Quantitative studies deal with numbers and data, whilst qualitative studies deal with words and meanings. Quantitative methods can help systematically degree variables and check hypotheses. Qualitative techniques allow you to discover concepts and reviews in greater elements.
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HELP ME OUT PLEASE!!!!
How can light waves from the sun be converted to electricity?
O through a hydroelectric dam
O through the process of fission
O through an electric heater
O through a solar cell
Answer:
Through a solar cell
hope this helps! :D
Answer: through a solar cell
Explanation: took the k-12 test
Which of the following are roles that prokaryotes play in the environment? Select all that apply.
Group of answer choices
(a) parasitizing eukaryotes, causing diseases
(b) breaking down organic matter
(c) fixing oxygen into water to be used by plants
(d) going through fermentation to produce foods like sauerkraut and pickles
(e) metabolizing materials in extreme environments like very acidic or salty
Answer: All of them are correct except maybe d but that depends
Explanation:
Use the correct terms to complete the statement about transcription.
Answers: (Golgi apparatus , nucleus , ribosomes , rough ER)
During transcription, a strand of mRNA is made based on the DNA template in the___________
The mRNA then leaves the nucleus and binds to
or in the _________ found on the _______ or in the cytoplasm. Ribosomes translate the mRNA message into proteins, which may enter
to be the ER to be modified. Proteins move to the____________processed and are then delivered to other locations in the cell or stored for later use.
During transcription, a strand of mRNA is made based on the DNA template in the nucleus.
The mRNA then leaves the nucleus and binds in the ribosomes found on the rough ER or in the cytoplasm.Ribosomes translate the mRNA message into proteins, which may enter to be the ER to be modified. Proteins move to the Golgi apparatus processed and are then delivered to other locations in the cell or stored for later use.How the strand of mRNA is copied based on the DNA template in the nucleus.For transcription to occur, there is this special enzyme known as RNA polymerase II which usually, frequently and most of the time initiate the sequence in the DNA strand; thereby, resulting in the production of the DNA template into mRNA. The whole of this process occurs in the nucleus.
In conclusion, a strand of mRNA is copied to mRNA based on the DNA template in the nucleus.
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Which example is a scientific question that could be used to start a scientific
investigation?
A. What is the most devastating effect of a forest fire?
B. Are forest fires as frightening as mudslides?
C. Should there be more services to prevent forest fires?
D. Do long droughts increase the likelihood of forest fires?
SUBMIT
"Do long droughts increase the likelihood of forest fires? "could be used to start a scientific investigation.
What is scientific investigation ?Scientific investigation can be defined as a step by step process which involve in different steps and investigation occur to find out the answer of a scientific question by using scientific method.
There are basic steps of Scientific Investigation such as
Making Observation the first step of the scientific investigation which involve in the observation of the process like inspection, the investigation by asking questions.
Asking Questions which is the second step is the make sure the known data and make a query which can be solved quickly by asking question may be theory or the topic.
Hypothesis making involves proper explanation of the query from observation and the scientific investigation can come from a phenomenon.
finally the conclusion part refers to the information drawn out final step will be proper scientific or a mathematical statement.
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Answer:
do long droughts increase the likelihood of a forest fire
Explanation:
Why does a gram stain cause gram positive bacteria to turn purple and gram negative bacteria to turn pink?
The thick strong layer of peptidoglycans present in the cell walls of Gram-positive bacteria generates the characteristic violet/purple color whereas Gram-negative cannot be colored by crystal violet.
What is gram staining?Gram staining is the process by which bacteria are differentially colored by crystal violet in the coloration protocol, which depends on the thick strong layer of peptidoglycan present in the cell walls of Gram-positive bacteria.
In conclusion, The thick strong layer of peptidoglycans present in the cell walls of Gram-positive bacteria generates the characteristic violet/purple color whereas Gram-negative cannot be colored by crystal violet.
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At one time, several kinds of camels lived in Florida. The evidence comes from fossils found in Florida. Which object would be a fossil that shows that camels once lived in Florida? Why?
A. a sinkhole formed by a retreating glacier
B. sedimentary rock that formed a long time ago
C. a crystal formation suspended from the ceiling of a cave
D. remains of an organism preserved by geologic processes
Answer:
d
Explanation:
fossils are remains of an organism preserved by geologic processes
If one parent is heterozygous and the other parent is homozygous recessive what is the probability that their child will be homozygous recessive?
If one parent is heterozygous and the other parent is homozygous recessive then the probability that their child will be homozygous recessive is 50%.
How do we calculate probability in genetics?Genetic probabilities refer to the likelihood to inherit a given genotype, which may be associated with a phenotype. These probabilities can be calculated by a Punnet square which indicated different genotypes in offspring.
In conclusion, if one parent is heterozygous and the other parent is homozygous recessive then the probability that their child will be homozygous recessive is 50% (monogenic traits).
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Choose the reason(s) why plants need fertilizer. (There may be more than one answer.)
To provide oxygen
To provide nitrogen for proteins
To provide carbon dioxide
To provide various minerals
To provide protein for plant growth
Answer:
Explanation:Fertilizers are food for plants.Plants get carbondioxide from air and release oxygen.They are added to the soil to make up the deficiency of essential elements like nitrogen,phosphorus and potassium required for the proper growth of plants.
What would happen to the amount of oxygen produced during photosynthesis, if a plant was
deprived of water?
O There would be no change in oxygen production
O Oxygen production would immediately stop
O More oxygen would be produced
O Less oxygen would be produced because water is required during the light dependent stage
Answer:
Less oxygen would be produced because water is required during the light dependent stage
Explanation:
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In this lab we first mixed some liver with hydrogen peroxide in test tube #1 and observed foaming letting it completely react. Then we poured off the remaining liquid into a second test tube #2. Next we added fresh liver to test tube #2 and no reaction (foaming) occurred because;
Question 6 options:
The liquid in test tube #2 was Oxygen.
The liquid in test tube #2 was water.
The liquid in test tube #2 was Hydrogen peroxide.
The liquid in test tube #2 was Catalase. ..
The liquid in test tube #2 was catalase. It is catalase because it will dismutate hydrogen peroxide into water and oxygen so it will not react with the liver.
What is catalase?Catalase is an enzyme that will catalyze the reaction that breaks down hydrogen peroxide into oxygen and water. The enzyme needs a heme group and manganese as a cofactor. Hydrogen peroxide is a strong compound that has the function of protecting microorganisms but due to its toxicity it must be transformed into less dangerous products, so catalase is vital for this process.
Therefore, we can confirm that the liquid in test tube #2 was catalase. It is catalase because it will dismutate hydrogen peroxide into water and oxygen so it will not react with the liver.
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What are 3 sinks of nitrogen? What organisms release nitrogen from these sinks?
The best 3 sinks of nitrogen are developing roots, leaves are the major sinks during the vegetative phase.The flowers, fruits and seeds are major sinks during the reproductive phase of the plant.
What is the role of nitrogen in plant ?It is the component of various chemicals and substances that are synthesized in plants along with playing role in atmosphere as well.
Nitrogen fixing bacteria that are the organisms which release nitrogen from the plants that is the organisms that are helping fix nitrogen in plants as well along with playing role in atmospheric nitrogen fixation as well. Some of the bacteria are nitrobacter, rhizobium in the root nodules of roots.
Cyanobacteria that is the blue green algae that plays in the fixation of nitrogen as well. Nitrogen is being passed from one organism to other through the passing of food chains and the dependency of organisms on each other makes nitrogen move from source to sink.
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the root hair originated from
If one parent Is heterozygous and the other pair is homozygous recessive the probability that their child will be homozygotes recessive is what?
The probability that a child will be homozygous if one parent is heterozygous and the other pair is homozygous is 50%.
How to determine the probability of a genetic cross?According to this question, one parent is heterozygous and the other pair is homozygous recessive. This means that the genotype of the heterozygous parent is Xx while the homozygous recessive is xx.
These two parents will cross as follows: Xx × xx
The gametes produced by the heterozygous parents are as follows: X and xThe homozygous parents will produce the following gametes: x and x2 Xx will be produced while 2 xx will be produced, hence, 50% of the children will have a homozygous genotype.
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Why do the polypeptides made in prokaryotes always contain formyl methionine as the first amino acid?
Select one:
a.
The terminator tRNA adds methionine amino acid first.
b.
The terminator tRNA adds formyl methionine first.
c.
The initiator tRNA adds methionine amino acid first.
d.
The initiator tRNA adds formyl methionine first.
In translation process, the initiator tRNA adds formyl methionine first.
What is translation ?Translation is the formation of protein from m-RNA. Similar to mRNA synthesis, protein synthesis can be broken down into three stages: initiation, elongation, and termination.
The first stage of protein synthesis is the formation of an initiating complex.This complex in E. coli is composed of the short 30S ribosome, the mRNA template, three initiation factors (IFs; IF-1, IF-2, and IF-3), and a particular initiator tRNA known as tRNA Metf.Met-tRNAThe initiator tRNA, or I is a particular tRNA that carries the amino acid methionine.Instead of looking for the Shine-Dalgarno sequence, the eukaryotic initiation complex looks for the 5′ cap of the eukaryotic mRNA. It then follows the mRNA from 5′ to 3′ until the AUG start codon is found.Currently, the Met-tRNAi, mRNA, and 40S subunit complexes interact with the 60S subunit.To know more about RNA :
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how did scientists change society's view of smoking after 1960
Answer: They proved it causes cancer,
Explanation:
There was a change in the view on smoking after 1960. change was influenced by declaring tobacco as an addiction and that it can cause cancer. It started in the 1964.
Answer:
Explanation:
The major cause of the change that society had on its view on smoking since 1960 was because of scientific information wherein scientists found that smoking causes cancer.
Ever since scientists discovered that smoking is bad for the lungs and the body in general, over time there became fewer and less people who do it. The smoke of cigarettes contains around 70 chemicals called carcinogens. These are known to cause cancer. So, society has changed its view on smoking since 1960.
A society's foodways are (choose best answer):
A)Nonessential to its structure and survival
B)Stable and unchanging over time
C)Flexible and overlapping
D)Products of colonization
at wich times on this paragraph would you expect that the boys growth plates have stopped creating new bone
The times where a person would expect that the boys growth plates have stopped creating new bone is when the boys are between 15–17 years of age.
What age do male growth plates close?The Growth Plates is one that often closes at the end of puberty and this is one that often occurs between the ages of 13 and 15 for girls as well as between 15 and 17 years for boys.
Note that some studies also reveals that there are some rear cases where some men continue to develop just slightly after the age of 18 and it is one that is rarely seen above twenties.
Therefore, based on the above, The times where a person would expect that the boys growth plates have stopped creating new bone is when the boys are between 15–17 years of age.
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While Lucas and Omar were watching a football game, a player was penalized for "clipping," meaning that he had hid an opposing player on the lateral knee area, causing hyperabduction at the knee joint. Lucas asked Omar what the big deal was bout clipping. What joint is most at risk? What anatomical elements are most likely to be injured from clipping? Be sure to be complete and thorough with your responses.
Answer: for "clipping," meaning that he had hid an opposing player on the lateral knee area, causing hyperabduction at the knee joint. Lucas asked Omar what the big
Explanation:
What do the numbers 3 and 4 refer to?
1. Consider how lettuce or spinach placed in water becomes firm and crisp. Use what you have learned about cell membranes to explain this observation. Be sure to include homeostasis in your explanation.
Lettuce or spinach becomes crunchy in water because it draws water back into its vacuoles.
How do they get crispier when you add water?Plant cells will be made up of an outer wall that is rigid in addition to the cell membrane, and will also have a vacuole in its center filled with water that is responsible for keeping the cell swollen. So when adding lettuce or spinach to a medium full of water, the water will enter the cell to maintain homeostasis in the medium, since there will be more water outside than inside.
This will then cause the cell to become swollen and firm, making the lettuce or spinach firm and crisp again.
Therefore, we can confirm that lettuce or spinach becomes crunchy in water because it draws water back into its vacuoles.
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Question 18 of 30
How does scientific knowledge continue to change over time?
Answer:
through the history of science
Explanation: