Which of the following statements about a controlled experiment is accurate? a. All the variables must be kept the same. b. Only one variable is tested at a time. c. Everything can be studied by setting up a controlled experiment. d. Controlled experiments cannot be performed on living things
Answer:
B.
Explanation:
Only one variable is altered at a time in a "controlled experiment." The rest of the variables should be kept the same or “controlled.”
What does parent material refer to?
Answer:
Soil Source
Explanation:
Environmental Science - Quiz 2.2.4: Soil Composition and Structure
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name the process responsible for the formation of glomerular filtrate
Answer: Please refer to:
The process by which glomerular filtration occurs is called renal ultrafiltration. The force of hydrostatic pressure in the glomerulus (the force of pressure exerted from the pressure of the blood vessel itself) is the driving force that pushes filtrate out of the capillaries and into the slits in the nephron.
Explanation:
Not sure but hope it helps.
giving brainliest!!
Which represents the complimentary base pairing rule for DNA replication?
Adenine pairs with guanine and cytosine, pairs with thymine
Adenine pairs with cytosine, and guanine pairs with thymine
Guanine pairs with cytosine, and adenine pairs with thymine
Guanine pairs with uracil, and adenine pairs with cytosine
Answer:
C
Explanation:
You will need to follow Chargaff's rules.
Adenine always pairs with thymine and cytosince always pairs with guanine.
Guanine pairs with cytosine, and adenine pairs with thymine is the base pairing rule for DNA replication.
What is DNA?DNA exists abbreviation of deoxyribonucleic acid, an organic chemical of complicated molecular structure that exists found in all prokaryotic and eukaryotic cells and numerous viruses. DNA codes genetic announcement for the transmission of inherited traits. Each strand of a DNA molecule exists comprised of a long chain of monomer nucleotide. The nucleotide of DNA consists of a deoxyribose sugar molecule to which stands connected a phosphate party and one of four nitrogenous bases.
Hence, Guanine pairs with cytosine, and adenine pairs with thymine is the base pairing rule for DNA replication.
Therefore, third option is the correct answer.
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Due to the partial charges on atoms in a water molecule, ____ in water molecules are attracted to oxygen atoms in other water molecules.
Hydrogen bond in water molecules are attracted to oxygen atoms in other water molecules.
A hydrogen bond is a strong dipole-dipole attraction which occurs between:
the hydrogen atom attached to a strongly electronegative atom (for example oxygen in water molecules)another strongly electronegative atom with a lone pair of electronsHydrogen bonding occurs in the following compounds which include water, hydrogen fluoride and ammonia.
When an electronegative atom such as oxygen is bonded to hydrogen, a dipole develops causing the hydrogen to be partially positive while the other atom is partially negative.
Thus, this accounts for high boiling point in compounds that contains hydrogen bonds.
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Which of the following mechanisms of change in genefrequencies is responsible for the antibiotic resistance of E. coli in this experiment?
A. founder effect
B. natural selection
C. population bottleneck
D. genetic drift
Natural selection is the mechanism responsible for the antibiotic resistance of E. coli.
Natural selection is a mechanism that favors the adaptation of organisms to survive in their environment, thrive and reproduce.
In the context of antibiotic resistance, antimicrobial substances exert selective pressure on microbes that encourages the evolution of resistance.
Those capable of resisting the effects of antibiotics survive and reproduce, while the vulnerable either die or have their growth inhibited.
The excessive and inappropriate use of antibiotics favors selection for antibiotic resistance in bacteria.
E. coli is characterized by having Gram negative bacilli, it represents the greatest risks of zoonotic transfer of resistance.
In general, and when a treatment is short, there is an elimination of sensitive saprophytic strains of E. Coli and an enormous predominance of resistant strains.
Bacteria also acquire antimicrobial resistance through vertical or horizontal transfer of genetic information.
Therefore, we can conclude that resistance to antibiotics in E. coli is due to the process of natural selection since it evolves to resist the action of an antimicrobial agent.
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what is biomolecules ?how it works in our daily life
Answer:
all
Explanation:
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Answer:
Biomolecule, also called biological molecule, any of numerous substances that are produced by cells and living organisms.
Explanation:
The biomolecules may involve in several processes such as energy storage (carbohydrates), catalyzing the biochemical reactions (hormones), storing/transmitting the genetic codes (RNA/DNA), or altering biological and neurological activities (neurotransmitter/hormones.
(hope this helps)
How are castor seeds dispersed
Answer:
seeds can be disperse by rodent and birds, on mud adhering to boot, on vehicle and machinery, and by flood water. It is also spread by an explosive mechanisms( on local level) when the capsule dries up and splits
First birth medical term
Answer:
new born baby is the first medical term
Which person would more likely be a candidate for a surgery? Middle ear damage or inner ear damage?
Explanation:
candidate 4 inner ear surgery = inner ear
because inner ear is what helps you hear sound, more so than outer ear.
outer ear= ( like a speaker to capture sound).
inner ear = complex structures & bones to help process sound to brain...
depending on circumstances, drs may let each structure heal b4 next surgery, takes 6 wks
or more 2 heal if all goes as planned.
shud take a year 2 complete healing. meaning ; drainage tubes have 2 b inserted for drainage of infectious substances.
start with inner 1st then outward. protecting inner structures..
Describe the digestion of fats.
You should include reference to the following in your answer.
- Named regions of the alimentary canal and associated organs.
- Named chemicals, including the end producys of fat digestion.
Answer:
The majority of fat digestion happens once it reaches the small intestine. This is also where the majority of nutrients are absorbed. Your pancreas produces enzymes that break down fats, carbohydrates, and proteins. Your liver produces bile that helps you digest fats and certain vitamins.
Answer:
Triglycerides are large molecules, and unlike carbohydrates and proteins, they're not water-soluble. The digestive process has to break those large droplets of fat into smaller droplets and then enzymatically digest lipid molecules using enzymes called lipases. Digestion of fats mainly take place from fat enzymes produced in liver.
PLEASE MARK ME BRAINLIEST.What is the net force?
What is the direction right, left, up, down or no motion
what is the importance of biology?
Answer:
As a field of science, biology helps us understand the living world and the ways its many species (including humans) function, evolve, and interact. Advances in medicine, agriculture, biotechnology, and many other areas of biology have brought improvements in the quality of life.
In order to learn more about a rare disease, a doctor uses a computer to talk to another doctor halfway around the world. This technology trend in medicine is known as
Answer:
Telemedicine
Explanation:
I could be wrong, but I do not think I am.
Match each part of a cell with the body part that has a similar function.
Nucleus
Cell membrane
Mitochondria
Cytoplasm
Answer:
Nucleus: blood
Cell Membrane: skin layer
Mitochondria; stomach
Cytoplasm: brain like structure
I'm not really sure of my answers.
Explanation:
The function of nucleus matches with that of brain and the function of cell membrane with that of Golgi bodies. Similarly, the function mitochondria is similar with that of liver and the function of cytoplasm is similar to that of skin.
What is a cell?
Cell is the basic unit of living bodies. A cell contains a nucleus, cell membrane, lysosomes, Golgi bodies etc.
Nucleus regulates all the functions of a cell as brain do in our body. Cell membrane helps to transport ions inside the cell as Golgi bodied do.
Mitochondria provide the energy and produce the chemicals needed for all chemical processes in the cell as liver do in our body.
Therefore, nucleus and brain matches in function and cell membrane and Golgi bodies matches in function. Similarly mitochondria and liver marches as well as cytoplasm and skin matches in functions.
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Help me pleaseeee I need to finish this:(
Answer:
p
Explanation:
p=nucleic acido=carbohydraten=proteinss=lipidst=all have in commonr= proteinViruses and bacteria can infect human cells. Bacteria are living organisms, while viruses are not. How do you think the treatment for viral and bacterial illnesses differ? How do you think they affect healthy body cells? Explain your response.
Answer:
hope it helps
Explanation:
1) antibiotic drugs can kill bacteria however, they are not effective against viruses
2) some bacteria's help to digest foods and speed up enzyme reactions. Some bacteria cells destroy disease causing cells
The treatment for viral and bacterial illnesses differs primarily due to the fundamental differences in their nature and characteristics. Bacteria are living organisms that can be targeted by antibiotics, whereas antiviral medications are used to treat viral infections.
Both bacteria and viruses can affect healthy body cells, with bacteria directly invading cells and causing damage, while viruses rely on host cells for replication and can induce damage during the process.
Bacteria and viruses can both cause damage to host cells. Bacteria can directly invade and damage cells through mechanisms such as releasing toxins or inducing inflammation.
Viruses require host cells to reproduce. They invade host cells, hijack cellular machinery to replicate themselves, and subsequently cause damage to the infected cells during the process.
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Select the correct answer.
Imagine that an exchange student from China visits your class. While your teacher discusses how the United States has a limited government, the Chinese student raises his hand and asks why the government has limited power. Which point best highlights why the US government has limited power?
A.
A limited government means citizens pay fewer taxes.
B.
A limited government helps people avoid breaking the law.
C.
A limited government protects individual freedoms.
D.
A limited government prevents businesses from being too powerful.
Answer:
Option C
Explanation:
A limited government protects individual freedoms.
Hope this helps!
Discuss three ways to sustain the carbon cycle
what is photosynthesis ???
Answer:
plants feed themselves by manufacturing food by absorbing light as energy
Answer:
Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of suga
What is the cell theory?
Answer:
I guess it would help you
How many electrons are contained in a single covalent bond
hi <3
there would be 2 electrons. each atom shares an electron each so in a single covalent bond, there would be 2 electrons
hope this helps :)
There are two electrons in a covalent bond.
Deeper meaning:-A covalent bond can be meant of as a 'shared pair' of electrons, so there are 2 electrons in each bond. This means that a double bond will have 4 electrons in the space between the bonded nuclei, and a triple bond will have 6.
Hope it helps you...
(Answered by Benjemin)
what is semi conduction
Explanation:
Semi-conductive describes a component which conducts electricity less well than a good conductor but better than an insulator.
The hose should be semi-conductive, with a resistance high enough to insulate a stray current but conductive enough to get rid of static charge build-up.
Carbon black can be used to lower the resistivity of plastics, imparting antistatic, semi-conductive, or conductive properties.
Semi-conductive describes a component which conducts electricity less well than a good conductor but better than an insulator.
What is the significance of directionality of the monomers in a polymer
Answer:
When you put the monomers together in a certain sequence/order they have different structures and functions.
Explanation:
Why do some scientists believe that RNA, rather than DNA, was the first genetic material?
RNA can replicate more accurately than DNA.
RNA contains uracil in place of thymine.
All of the protocells on early Earth contained RNA.
RNA has both information storage and catalytic properties.
The correct answer as to why some scientists believe that RNA, rather than DNA, was the first genetic material would be that RNA has both information storage and catalytic properties.
Other options are cannot be correct because:
RNA cannot replicate itself unless it is in a living host.RNA containing Uracil instead of Thymine has no effect on being the first genetic material or otherwise.There is no clear evidence to show that all of the protocells on early Earth contained RNAThe fact that RNA has the capacity to store information as well as catalyze important biological processes made it a plausible candidate as the first genetic material. DNA has the capacity to store information but lacks catalytic properties, unlike RNA.
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6.
What are two characteristics of each of Earth’s four major systems?
Answer:
Everything in Earth's system can be placed into one of four major subsystems: land, water, living things, or air. These four subsystems are called "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air)
Plant cells consist of
Explanation:
•Nucleus
•Plastids
•Central Vacuole.
•Golgi Apparatus
•Ribosomes
•Mitochondria
•Cell Wall
•Cell membrane
What cells in the body do NOT undergo mitosis as
adult cells?
Answer:
Skin cells, red blood cells or gut lining cells
Explanation:
Stem cells do divide by mitosis and this makes them very important for replacing lost or damaged specialized cells
6. Cuál es la característica de la vida que nos permite responder a estímulos?
Used to measure length
Answer:
meters
Explanation:
