WILL GIVE 20 POINTS AND BRAINLIEST PLS HURRY
In order for a scientific explanation to be valid, it MUST be based on evidence from _[blank]_.
a. hypotheses of scientific experiments
b. a credible scientific journal
c. the latest scientific research
d. observations of the scientific investigation
Answers
Answer:
a. hypotheses of scientific experiments
Explanation:
Related Questions
Hardwired characteristics of the brain that attempt to keep us in balance by correcting deficiencies are referred to as:
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Hardwired characteristics of the brain that attempt to keep us in balance by correcting deficiencies are referred to as homeostatic mechanisms.
Homeostasis is the body's ability to maintain a stable internal environment despite external changes.
In the context of the brain, homeostatic mechanisms involve various processes that regulate physiological functions and maintain optimal levels of essential substances.
These mechanisms can include feedback loops that detect imbalances and initiate corrective actions.
For example, if there is a deficiency in a particular nutrient or hormone, the brain may activate mechanisms to increase its production, decrease its consumption, or enhance its absorption from the environment.
Homeostatic mechanisms play a crucial role in ensuring the body's overall stability and functioning, helping to maintain proper levels of various substances and promoting overall well-being.
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cells could not be discovered until an instrument called the
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Answer:
Im pretty sure it's the microscope
Answer:
The invention of the Microscope
What is the population density?
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What did miller's experiment prove
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Miller-Urey experiment was a chemical experiment that simulated the conditions of the prebiotic Earth, by testing the chemical origen of life under the conditions of the enviroment in that time. The experiment used water, ammonia, hydrogen, and methane seled inside a sterile 5-liter glass flask to a 0,5-liter flask half-full of water being it continuous exposed to electrical sparks. Miller could show that the prebiotic condition for life in his test produced 11 of the 20 known amino acids, showing that from inorganic simple molecules was the start of origen of life in Earth.
the DNA sequence was TACGATACA, what would be the mRNA sequence
made?
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Answer:Explore the relationship between mRNA and DNA, how to determine DNA sequences based on mRNA sequences, and how to determine mRNA by the DNA
Explanation:
What are two reasons plants might produce vegetative plants
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Answer:
Vegetative reproduction, any form of asexual reproduction occurring in plants in which a new plant grows from a fragment of the parent plant or grows from a specialized reproductive structure (such as a stolon, rhizome, tuber, corm, or bulb).
Explanation:
Some people with Turner syndrome are 45,X/46,XY mosaics How could this mosaicism arise?
a. A cell gains an X chromosome soon after fertilization in an XY embryo
b. A cell gains a Y chromosome soon after fertilization in an XX embryo
c. cell loses an X chromosome soon after fertilization in an XY embryo.
d. A cell loses a Y chromosome soon after fertilization in an XY embryo.
e. A cell loses a Y chromosome soon after fertilization in an XX embryo
Answers
This mosaicism in Turner’s syndrome arises as a result of some cells losing a Y chromosome soon after fertilization in an XY embryo. (option d)
If the sperm provides a Y chromosome, the zygote shall obtain karyotype 44+XY. A mother shall produce a gamete having X chromosome. This would result in an 44+XY embryo(total 46 chromosomes). This zygote starts dividing cells but if somehow cells of this embryo lose that Y chromosome, the karyotype would become 44+X0(total 45 chromosomes, and condition of Turner’s syndrome). Thus, initially fated to be an XY embryo with 46 chromosomes, some cells now have 45 chromosomes with X0 condition(Turner’s syndrome).
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4. An object is moving along at a constant velocity of 100 cm/s. What is the external force acting on the object?
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Answer & Explanation: Constant velocity means that the forces are balanced, and thus Fnet = 0.
In multicellular organisms, describe two specializations that result from mitosis.
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In multicellular organisms, Two specializations that result from mitosis are as follows: Tissue Regeneration, Growth and Development.
Mitosis is a form of cell division that occurs in eukaryotic cells. Mitosis is significant for the growth, development, and repair of multicellular organisms. Two specializations that result from mitosis are as follows:
Tissue Regeneration: Mitosis plays a significant role in the tissue regeneration process. When an organism experiences cell damage or is injured, it needs to repair the damage as quickly as possible. Mitosis helps regenerate damaged tissues and organs by dividing the cells that need to be replaced. These new cells are identical to the parent cells and have the same genetic information. Mitosis ensures that the new cells have the same number of chromosomes as the parent cells, so the regenerated tissues can function as before.
Growth and Development: Mitosis is critical in the growth and development of multicellular organisms. The process of mitosis allows for the generation of new cells, which results in the growth of the organism. Mitosis is a vital process that ensures that the new cells generated during growth and development have the same genetic information as the parent cells. Mitosis plays a critical role in the development of multicellular organisms by allowing the organism to grow and develop from a single cell to a fully formed organism.
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Which describes a pathway that tends to slow down a process?
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A pathway that tends to slow down a process is called a negative feedback loop.
What we know about these loops. These loops function to reduce the rate a which a process occurs. Being a feedback loop means that they take in stimuli from the environment of the cell in order to affect the rate of production of a compound. A negative feedback loop will activate when the concentration of the compound being produced is too high.In response, the negative loop will reduce the rate of production temporarily.Therefore, we can confirm that a pathway that tends to slow down a process is called a negative feedback loop.
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Which statement best distinguishes plant cells and animal cells?
There are more ribosomes in animal cells than in plant cells.
Plant cells have more lysosomes than animal cells have.
Plant cells have large vacuoles, and animal cells do not.
The position of the nucleus in the cells is different in plants and animals.
Answers
Answer:
The statement that best distinguishes plant cells and animal cells is, "Plant cells have large vacuoles, and animal cells do not."
Answer:
Plant cells have large vacuoles, and animal cells do not.
Explanation:
Correct on Edge
ahh ༎ຶ‿༎ຶ please help I'm stuck
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if bases on a mRNA strand (codon) AUA then the three bases on the molecule ( anticodon) would be what?
Answers
In RNA:
A=U and C=G
Adenine = Uracil Cytosine=Guanine
*Note that Uracil is found only in RNA and that Thymine replaced Uracil in DNA, and is only found there.**
Good luck!
how many different processes can be involved in changing the allele frequency?
A. 10
B, 1 only natural selection
C. 4
D. 5
E. Way too many count.
Answers
Answer:
5
Explanation:
The Hardy-Weinberg equilibrium principle says that allele frequencies in a population will remain constant in the absence of the four factors that could change them. Those factors are natural selection, mutation, genetic drift, and migration (gene flow). In fact, we know they are probably always affecting populations.
Answer:
D. 5
Explanation:
There are 5 factors can be involved in changing the allele frequency.
We used the enzyme, taq polymerase, which is derived from the thermus aquaticus bacterium, in our pcr procedure. Why is this enzyme important for efficiency in pcr?.
Answers
Taq polymerase enzyme important for efficiency in PCR because it is thermostable polymerases that remain active at high temperatures (90 -95 degree Celsius) a beyond the denaturation temperature of DNA.
PCR :
Polymerase chain reaction (PCR) is a laboratory technique for rapidly amplifying millions to billions of copies of a specific segment of DNA, which can then be used for further research.
Taq polymerase is a DNA polymerase derived from bacteria called Thermus aquaticus, which are naturally thermophilic and is a thermostable polymerases that remain active at temperatures higher than the temperature at which DNA is denatured. This allows PCR to be used on DNA samples without the need to add new DNA polymerases after each cycle.
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During transcription, what reads the template strand within a gene and adds complementary bases?
Answers
During transcription, the RNA polymerase reads the template strand within a gene and adds complementary bases.
Transcription is the process by which the multi-unit enzyme RNA polymerase creates RNA molecules from a DNA template. Prior to translation, which is the process of decoding RNA into proteins, the transcription of genetic information into RNA is the initial stage in gene expression.
Together with transcription factors, RNAP forms a transcription pre-initiation complex by attaching to the promoter region on a DNA strand (PIC). The transcription procedure is started at this point. At the 5' end of a DNA strand, upstream, is the promoter site.
An intermediary enzyme called RNA polymerase is in charge of the process of transcription, in which DNA serves as a template for the synthesis of RNA-based genetic material. In the cell's nucleus, transcription occurs.
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The founder effect and the bottleneck effect are considered what kind of speciation? Describe either of these and give a hypothetical example if possible.
Plz quick
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The founder effect and the bottleneck effect are considered the essence.
In a _____ circuit, the current is the same everywhere.
Answers
Answer:
A series circuit
Explanation:
In a series circuit, the current is the same everywhere.
Answer:
series circuit
Explanation:
list the similarites between amino acids, fatty acids, and sugars(monosaccharides).
Answers
The similarities between amino acids, fatty acids, and sugars include the following below:
They are organic compounds.They are formed by the digestion of food. Some of them can be produced by the body. What is a Biomolecule?This is referred to as a biological molecule and are substances which are produced by cells and living organisms. Examples include the following:
CarbohydrateNucleic acidFatty acid etcThey all contain carbon atoms present in their molecular structure which is why they are referred to as organic compounds and can be produced by the body through some metabolic reactions.
Food substances serves as a source for these biomolecules as they are usually broken down through enzymatic actions in the process referred to as digestion.
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During photosynthesis, solar energy is
converted to....
A. electrical energy
B. heat energy
C. light energy
D. chemical energy
Answers
Answer:
d. Chemical Energy
Explanation:
hey could u answer these tru/false questions thanks
1.when we classify living organisms we can know how many species there are.
2.taxonomists do not create new groups to fit for the newly classified organisms
3.all the organisms on earth are discovered nowadays
thnak you
Answers
Answer:
1.true
2.false
3.false
Which researchers used radioactive markers in experiments tho show that DNA was the genetic material in cells?
Answers
Answer:
The Hershey–Chase experiments were a series of experiments conducted in 1952 by Alfred Hershey and Martha Chase that helped to confirm that DNA is genetic material.
Explanation:
Hope it helps :)
Answer:
C. Alfred Hershey and Martha Chase
Explanation:
They conducted experiments to test whether protein or DNA was the hereditary material viruses transfer when viruses enter a bacterium. They used radioactive sulfur to mark the protein and radioactive phosphorous to mark the DNA.
A potential benefit to genetically modifying mosquitos is: Group of answer choicesMosquitoes will spread fewer cases of serious diseases, including malaria and Zika.Mosquito bites will be less itchy.Scientists will be able to create better insect repellent
Answers
Genetically modified mosquitoes will have their reproduction impeded and will also cause to spread of a gene that will prevent them to pass diseases from one mosquito to another.
Mosquitoes will spread fewer cases of serious diseases, including malaria and Zika.
Describing Water Molecules Which of these statements would be true if the water molecule was linear instead of bent? Check all that apply. Water molecules are polar. Water molecules are nonpolar. Water molecules undergo hydrogen bonding. Water molecules have a linear geometry. Water molecules have a bent geometry.
Answers
Answer: These are the correct answers...
-Water molecules are polar
-Water molecules undergo hydrogen bonding
- Water molecules have a bent geomtry
Hope this helps whoever needs it
The statements that are correct about water molecules are:
Water molecules are polar. Water molecules undergo hydrogen bonding.Water molecules have a bent geometry.Water is polar molar due to the unequal sharing of electrons between the atoms and the unsymmetrical shape of the molecule means that a water molecule has two poles - a positive charge on the hydrogen pole (side) and a negative charge on the oxygen pole (side).Water molecules forming hydrogen bonds with one another.Water has a bent shape is that the two lone pair of electrons are on the same side of the molecule.Learn more:
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Five students get sick with a cold after a weekend field trip to the aquarium with their classmates. Which best explains why these students became sick?
A contact with an infected fish
B. contact with an infected person
C. contact with contaminated food
D contact with a contaminated water
Answers
Answer:
The answers is B
Explanation:
I just took a test that had this question on it.
B. contact with an infected person
Transmission occurs when an infected person interacts or exchanges bodily fluids with another person. This can happen before the infected individual even realizes they are sick.
After a weekend field trip to the aquarium with their classmates, five pupils catch a cold. Because they may have come into contact with an infectious person, students became ill. Students became sick as a result of B. contact with an infected person
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Nile perch were introduced to Lake Victoria in the late 1950s. Nile perch are hardy fish that can tolerate oxygen conditions as low as 6 mg/L.
Recently, scientists measured oxygen concentration at different depths in Lake Victoria and found that below 70 meters, oxygen
concentrations dropped to less than 1 mg/L.
What would happen if oxygen concentrations throughout Lake Victoria fell to similar levels?
O A The fish populations living above 70 meters would increase.
OB. The fish populations living at 70 meters might move to deeper water.
C. The fish populations living below 70 meters would be slightly stressed.
OD. The fish populations living above, below, or at 70 meters might become extinct.
Answers
The fish populations living above, below, or at 70 meters might become extinct. Therefore, option (D) is correct.
Nile perch, being hardy fish capable of tolerating oxygen levels as low as 6 mg/L, may still face extreme stress and struggle to survive in an environment with oxygen concentrations below 1 mg/L. Such a drastic decrease in oxygen levels would severely impact the entire ecosystem of the lake, potentially leading to mass mortality and extinction of fish populations across different depths.
This is because oxygen is essential for the survival and respiration of aquatic organisms, and a severe lack of oxygen can have devastating consequences for their health and survival.
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why is much of human neural development postponed until after birth?
Answers
Much of human neural development is postponed until after birth because a baby's head is so large that if the brain developed in the uterus as it does outside the womb, it would not fit through the birth canal.
The human brain undergoes a remarkable development from conception through childhood. Although most of the brain’s development occurs in utero, the brain continues to form and shape itself throughout life, especially during the early years of infancy and toddlerhood.
The cerebral cortex is responsible for much of the brain's higher-level functioning, including memory, attention, perception, and consciousness. In the first few years of life, the human brain rapidly develops and undergoes a period of rapid growth and neural plasticity.
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all living things need fuel to keep their systems running name of this process
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Answer:
Respiration. All living organisms must be capable of releasing energy stored in food molecules through a chemical process known as cellular respiration. In aerobic respiration, oxygen is taken up and carbon dioxide is given off.
Leaf from Plant #1
Leaf from Plant #2
1.
Il.
III.
Plant #1 is better adapted for hot, dry environment than Plant #2.
If placed in the same environment, Plant #1 will lose more water than Plant #2
If placed in the same environment, Plant #1 will absorb more sun than Plant #2.
Which is true?
Answers
Answer:evry thing is true
Explanation:hope it help
Proteins are used to enable movement, provide structure and support, and carry out important chemical reactions inside the body. What is needed in order for the human body to synthesize proteins? F. a diet rich in amino acids G. sufficient sunlight and water H. 1,200 calories of nutrients per day 1. minerals and fats in sufficient amounts
Answers
Answer: F a diet rich in amino acids
Explanation:
Proteins are used to enable movement, provide structure and support, and carry out important chemical reactions inside the body a diet rich in amino acids is required to synthesize proteins.
What is protein?
Protein is defined as the large macromolecules and biomolecules that are made up of long chains of amino acid. There is various function of protein such as DNA replication, speeding up chemical reaction, and helps to maintain the structure of cell.
The main function of protein is to maintain the structure and function of organs, repair muscle, and muscles. Diet contain high protein is recommended for the purpose of losing weight, reducing fat, or increasing fat.
There are several types of protein such as structural protein, transport proteins, antibodies, contractile proteins, hormonal proteins, and enzymes. Enzymes are the biological catalyst that speed up the chemical reaction that carries out in the body.
Enzymes are protein by nature and there are number of enzymes present in our body such as salivary amylase, pepsin, renin, lyases, lygases etc
Therefore,Proteins are used to enable movement, provide structure and support, and carry out important chemical reactions.
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