Answer:
Chargaff's rules state that DNA from any species of any organism should have a 1:1 stoichiometric ratio of pyrimidine and purine bases and, more specifically, that the amount of guanine should be equal to cytosine and the amount of adenine should be equal to thymine. This pattern is found in both strands of the DNA.
Alfred Wegener's theory about Earth's past included a supercontinent made up of all the continents put together.
What was the name of the supercontinent?
Pangaea
Americas
Gondwanaland
Laurasia
Answer:
I do K12 and got it right its A. Pangaea.
Hope it helped, 0Drink0Milk0
Answer: d. Pangaea
Explanation:
When marine animals die their shells decay into limestone when the limestone is exposed is released this process is known as
Answer:
fossilization
Explanation:
what is the function of RBC
Answer:
When a red blood cell is placed in a hypertonic solution, it contracts as water is drawn out of the cell and into the surrounding solution. If the same blood cell is placed in a hypotonic solution, the blood cell grows in size. Blood cells in isotonic solutions do not shrink or swell.
The reason that blood cells change in size when placed in a solution with different salt concentration is due to the osmosis process. Osmosis causes solutions with high concentrations of salt to draw water from areas with low concentrations of salt.
There are some exceptions to this phenomenon. Blood cells can draw water and explode when placed in hypertonic solution on some special occasions. Some diseases affect the structural integrity of blood cells. Also, when human blood cells are exposed to temperatures close to freezing, they can draw water and explode.
Osmosis is an important phenomenon for living systems. The amount of salt in a given solution exhibits a tendency to diffuse through the environment, eventually resulting in equilibrium. In addition to blood cells, the kidneys function through the use of osmotic principles. The kidneys filter an animal's blood to remove excess salt and balance the amount of water
Answer:
It carry oxygen from our lungs to the rest of our bodies. they make the return trip, taking carbondioxide back to our lungs to be exhaled
Thymine is to DNA as uracil is to
A. RNA
B. adenine
C. ATP
D. Protein
Answer:
A. RNA
Explanation:
DNA has the chemical base of thymine, while RNA does not.
Instead, RNA has the base of uracil, to replace thymine.
Since the analogy relates thymine to DNA, uracil must be related to RNA.
So, A is the correct answer.
Thymine is to DNA as Uracil is to RNA.
What would happen if the smooth ER
in the cell were destroyed?
A. The cell would be unable to
produce glucose.
B. The cell would no longer be able to
produce proteins.
C. The cell would not be able to make
enough ATP through respiration.
D. The cell would not be able to make
lipids or break down poisons.
4. All of the following are limiting factors to a population EXCEPT
A. competition
B. predation
C. human disturbances
D. immigration
Answer: I think it is d
Among the given options, immigration is considered as the limiting factor to a population. Thus, the correct option is D.
What is Population?A Population may be defined as the number of individuals of the same species living in a particular area at a definite time. It also represents the number of males and females in any population with respect to their characteristics.
Competition, predation, and human disturbances are responsible for the reduction of any population. This is because these factors generally involve the ultimate death of individual and health damage.
While immigration is typically a process through which an individual has come in order to live in that place. This place is not native to the individual. This increases the population of any specific region.
Therefore, among the given options, immigration is considered as the limiting factor to a population. Thus, the correct option is D.
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please what are the characteristics of protista kingdom
what is diffusion in biology
Answer:
Answer is below:
Explanation:
"Diffusion is the movement of molecules from an area of high concentration of the molecules to an area with a lower concentration. The difference in the concentrations of the molecules in the two areas is called the concentration gradient."
Answer:
Diffusion is thw movement of a solution going from a higher concentration to a lower concentration that is driven by a gradient.
Explanation:
Hope it helps c: ♡
Which of these is NOT true about the outer core? HURRY! MARK BRAINLIEST
Question 2 options:
It has a higher temperature than the inner core.
It is mostly made up of iron and nickel.
It is mostly liquid.
Atoms within it form a powerful magnetic field.
Answer:
It has a higher temperature than the inner core.
Explanation:
The inner core is indeed hotter than the outer core, is mostly composed of liquid iron and nickel, and magnetism in the outer core is about 50 times stronger than it is on the surface.
¿Como se le denomina a la estructura formada por adición de vesículas procedentes de aparato de golgi que permiten la aceptación durante la citocinesis en las células vegetales?
Answer:
La estructura formada por adición de vesículas procedentes del aparato de golgi que permiten la aceptación durante la citocinesis en las células vegetales se denomina Fragmoplasto o Tabique.
Explanation:
El fragmoplasto o tabique es una estructura que no se encontrará en las células animales, sino vegetales. Viene a ser una especie de "puente" entre la pared celular que luego se dividirá, dando lugar a dos células.
Durante la anafase y telofase los distintos filamentos y microfilamentos del fragmoplasto se acumulan de manera opuesta para dar paso a la nueva pared celular.
A diferencia de la citocinesis en las células animales que se da por un mecanismo de estrangulación, en las células vegetales se logra por tabicación.
Match the following enzymes involved in DNA replication with their functions.
a. DNA ligase
b. DNA polymerase
c. DNA gyrase
d. helicase
Answer:
DNA ligase is an enzyme which can connect two strands of DNA together by forming a bond between the phosphate group of one strand and the deoxyribose group on another.
DNA polymerase is an enzyme that synthesizes DNA molecules from deoxyribonucleotides, which are the building blocks of DNA. The enzymes play an essential role in DNA replication, usually working in pairs to produce two matching DNA stranges from a single DNA molecule.
DNA gyrase is an essential bacterial enzyme that catalyzes the ATP-dependent negative super-coiling of double-stranded closed-circular DNA
Helicases are enzymes that bind and may even remodel nucleic acid or nucleic acid protein complexes. There are DNA and RNA helicases. DNA helicases are essential during DNA replication because they separate double-stranded DNA into single strands allowing each strand to be copied.
Explanation:
DNA ligase seals the fragment, DNA polymerase adds a new nucleotide, DNA gyrase unwinds the DNA, and helicase makes a dent in double helix.
What is DNA replication?DNA replication is the physiological method that generates two identical replicas of DNA from a single original DNA molecule in molecular biology.
DNA replication takes place in all living organisms and is the most important component of biological inheritance.
Helicase, primase, DNA polymerase, and ligase are the four main enzymes that aid in DNA replication.
Many proteins and enzymes play a role in DNA replication, including: Topoisomerase: This enzyme relaxes the super-coiled nature of DNA. Helicase: Helicase is a protein that separates the two strands of DNA at the replication fork.
The fragment is sealed by DNA ligase, a new nucleotide is added by DNA polymerase, the DNA is unwound by DNA gyrase, and a dent in the double helix is made by helicase.
Thus, this can be the match for the given scenario.
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what makes up cell membranes and is used to create hormones.
A. cholesterol
B. hydrocarbon
C. starch
D. glucose
Answer:
What makes up cell membranes and is used to create hormones?
cholesterol**
All biomolecules have the following traits except
nitrogen elements**
What enzyme breaks down starch in your saliva?
amylase**
Which soil-based compounds do plants use to create amino acids from glucose?
nitrogen**
What is a lipid that makes up cell membranes and is used to create hormones?
cholesterol**
Cholesterol makes up cell membranes and is used to create hormones.
Cholesterol is a necessary lipid for the body as it contributes to the formation of cell membranes and hormones. However, high amounts of cholesterol in the blood have harmful consequences for health.
Cholesterol has different functions in the body such as:
- Formation of structures: It is one of the main components of the plasma membranes of animal cells.
- Contributes to the formation of hormones: sex hormones (progesterone, estrogens, and testosterone), corticosteroid hormones (cortisol and aldosterone).
- Contributes to the metabolization of calcium to obtain vitamin D.
Additionally, the options hydrocarbon (natural chemical compound obtained from the earth to be used as fuel), starch (natural macromolecule that contributes to the human digestion process) and glucose (the most abundant chemical compound in nature that serves as a source of energy for organisms) are not correct options, because these substances do not have the function of forming cell membranes and creating hormones.
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Describe your diagnosis for the patient. How did the chlorine gas affect concentration difference, diffusion distance, and surface area in the patient’s lungs? Explain how these affected the diffusion rate.
The concentration difference and surface area lead to decrease but the diffusion distance increases due to application of chlorine.
The difference in the concentration of a substance between two regions is known as the concentration gradient.
Surface area is the total area that the surface of the object occupies.
Diffusion rate is defined as the change in the quantity of diffusing molecules inside the cell in a specific period of time.
The chlorine gas greatly affected the concentration difference because it lowers the value. The gas increases the diffusion distance but decreases the surface area of the patient's lungs. The decrease in the concentration difference leads to slower the diffusion rate.
It is because there is less difference in the concentration of both regions i.e. lungs and the surrounding atmosphere and when there is equal amount on both sides the diffusion of gas molecules stopped so we can say that decrease occur in the concentration difference and surface area but increase occur in the diffusion distance
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Over the course of an individual's life, personality is _________
A. remarkably stable in the long term
B. constantly changing between stages
C. impossible to reliably measure
D. capable of both change and stability
Answer:
On ed2020 its D
Explanation:
In individual's life, personality is capable to change and also being stable over the course of development, hence option d is correct.
What is personality?At other words, rather than a progressive growth, development happens in different levels. The term "development" has a favorable meaning, its meaning varies depending on how it is used.
Typically, the word "development" indicates growth, it refers to a time when things transform and develop. Additionally, it tends to encourage people to reach their maximum potential.
Therefore, it may also refer to a different interpretation of an earlier occurrence, personality can change or be stable, hence option d is correct.
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Water molecules stick to other materials due to its polar natue. This property is called And Explain?
This property is called adhesion. Hydrogen bonds hold water molecules closely together which causes water to have high surface tension.
Genetic information is stored and transmitted within
A.nucleic acids.
B. proteins.
C.amino acids.
D.sugars.
PLS HELP ASAP ROCKY
Which sequence best explains the relationship between DNA and protein structure and function?
DNA → gene → protein → trait
DNA → amino acid triplets → protein → trait
DNA base triplets → amino acid sequence → protein folding pattern → protein shape and function
DNA shape → amino acid sequence → protein shape and function
im currently brain dead rn and have no clue to what the answer is, pls help :,)
The sequence that best explains the relationship between DNA and protein structure and function is: DNA base triplets → amino acid sequence → protein folding pattern → protein shape and function
DNA is the genetic material found in living cells. They encode genetic information that are read and used to produce useful products in an organism. A triplet nucleotide sequence called CODON is used to synthesize an amino acid sequence via the process of transcription and translation. The amino acid sequence determines the folding pattern of the protein. The folding pattern of a protein molecule is responsible for the shape and function of that protein molecule. Therefore, the sequence that best explains the relationship between DNA and protein structure and function is: DNA base triplets → amino acid sequence → protein folding pattern → protein shape and functionLearn more at: https://brainly.com/question/14136689?referrer=searchResults
What can you infer from the following example? “Long extensions on nerve cells allow these cells to relay messages to other cells.”
A- cells come from preexisting cells
B- cell shape helps cells perform specific functions
C- all organisms are made up of more than one cell
Answer:
The right answer is B cos cells shape helps them perform specific functions
Explanation:
Plz give me brainiest
What is the differnce between mitosis and cytoknesis
Answer:
Mitosis is the process in which the nucleus of a eukaryotic cell divides. Cytokinesis is the final stage of cell division, during which the cytoplasm splits into two and two daughter cells form.
Explanation:
hope this helps ya :)
Answer:
the one answered above is true
How is the age distribution pattern of the Hawaiian Islands - Emperor Seamount chain explained by the position of the Hawaiian hotspot? Explain using evidence and reasoning.
Answer:
Find the explanation below.
Explanation:
The Hawaiian Islands is a series of islands positioned in what looks like a chain, which increases in age as one moves northwest. The Hawaiian hotspot was formed as a result of the collision of the tectonic plates in the outer part of the earth which caused the rise of a volcano, and which in turn gave off magma which came to rest on a seafloor. That eruption on the seafloor is the hotspot.
This hotspot remains unmovable while the tectonic plates are in constant motion around the hotspot, giving rise to further Islands. This explains the age distribution pattern of the Hawaiian islands which arrived at different times making some older than the others.
Which of the following is the term for the dense area of the nucleus where ribosome assembly begins?
a. chloroplast
b.Golgi apparatus
c.vacuole
d.nucleolus
Answer: the answer is d
Explanation: most dense region
How is the phrase, “you are what you eat,” related to metabolism? Explain what that means.
Answer:
Because when you metabolize something you adsorb it's nutrients.
Explanation:
Is self-explanatory. Look at the answer...
A defensive soccer player is having trouble reacting quickly to the movements of the opposing player. How can the soccer player adjust her base of support to improve her reaction time?
Answer:
decrease the base of support and centralize her line of gravity
Explanation:
A wider base of support leads to an unsteady gait. The base of support is the contact between the feet of the soccer player and the surface (the field) supporting him. The root cause of the player's inability to react quickly to the movements of the opposing player is a lack of balance.
Balance is the ability of an individual to sustain the line of gravity which runs the center of gravity. For the player to regain his balance, she needs to decrease the base of support and centralize her line of gravity, so as to maintain balance.
The raw materials needed for photosynthesis are
A. Carbon dioxide and oxygen
B. Carbon dioxide and water
C. Chlorophyll and sunlight
D. Oxygen and glucose
Answer:
B. Carbon dioxide and water
Explanation:
please mark as brainliest
Answer:
I'd say C. Chlorophyll and sunlight.
Explanation:
HELP!!! MAJOR GRADE!!!!!
Gregor Mendel conducted thousands of genetic experiments using pea plants. Mendel is called the Father of Genetics because it was these studies that lead to the principles of genetics. In one of his many experiments, he crossed purple-flowered pea plants with white-flowered pea plants. Much to his surprise, all of the offspring turned out to be peas with purple flowers in appearance.
Although Mendel used the term factors instead of genes, how did Mendel explain why all the pea plants had purple flowers and not a mixture of white and purple flowers?
A.The offspring received the factors (genes) from both parents, but the genotype for purple flowers dominated over white flower pea plants.
B.The offspring only received the factors (genes) from the parent with the genotype for purple flowers and nothing from the white flower parent.
C.The offspring received the factors (genes) from both parents, but the phenotype for purple flowers dominated over the factor for white flowers.
D. The offspring only received the factors (genes) from the parent with the phenotype for purple flowers and nothing from the white flower parent.
Answer:
A
Explanation:
The purple gene was dominant, so though the plants got "factors" from both parents, only the purple gene was expressed in their phenotype (purple petals).
Plants such as the Venus Flytrap and the Sun Dew attract and consume insects. These plants are unable to produce substances which break down the insect into compounds that are usable by the plant. The chemical compound that breaks down the insects is most likely * O ATP O Lipids O Enzymes O Vitamins
Answer:
The chemical compound that breaks down the insects is most likely enzymes.
Explanation:
Venus flytraps and sundews are carnivorous- they consume insects to absorb nutrients via digestion. During absorption, their cells take up molecules synthesized via the breakdown of macromolecules like carbohydrates and proteins. When regions of the plant come into contact with insects, these plants recognize specific macromolecules like chitin, they increase the production of digestive enzymes.
Forming digestive liquid enzymes are specialized proteins that function as biological catalysts to speed up reactions. They act on substrates, which can bind to specific regions of the enzyme, called the active site. Once bound in the presence of highly specific temperature and pH, enzymes increase the rate of a reaction over time.
Common enzymes found in their digestive secretions include chitinases, phosphatases, amylases, and proteinases.
An organism that has different alleles - one dominate and one recessive it's called
Answer:
An organism which has two different alleles of the gene is called heterozygous. Phenotypes (the expressed characteristics) associated with a certain allele can sometimes be dominant or recessive, but often they are neither.
Explanation:
Analyze the document "King Andrew the First (c. 1833)” by explaining its "HIPP” (historical context, intended audience, author’s purpose, and author’s point of view). Refer to elements in the image to explain your response.
Answer: Andrew Jackson was a strong president. He used the office to forcefully pursue his agenda. This cartoon is quite famous, coming out around 1833, because of the 1833 removal order. In the cartoon, the president can be seen holding a veto in his hand, and standing on top of the Constitution. He is dressed up as a king, holding - perhaps - too much power. I believe that the intended audience was the people. The people saw him as a king, abusing his powers as a president. The author’s purpose was to show how people truly viewed him. The president’s order to remove federal deposits from the Bank of the United States led to an increase in state debt. The President was strongly criticized because he acted without congressional approval, as a king would.
Explanation: I don't recommend copying word per word, but hopefully this gives you a good start. Add anything you feel you need to, and good luck. You've got this. :3
The analysis of the document "King Andrew the First (c. 1833)” is as follows:
Historical context
It was created during the 1833 removal orderIntended audience
The American publicAuthor's purpose
To show that people truly believed in himAuthor's point of view
First personPresident Andrew Jackson was an enigmatic and strong personality during his tenure as President of the United States of America.
As a result of this, there was a cartoon which was created to help further his agenda. In it, he is depicted holding a veto power on top of the Constitution, while dressed in royal attire.
He wanted to show that he was a man of the people but it was viewed as a person who was wielding too much power than was suitable for a president as he occasionally acted without congressional approval.
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Que:
Which of these must occur during S phase of the cell cycle so that two daughter
cells can be produced during M phase?
Explanation:
the answer is d, the DNA must be replicated.
Answer:
d: the DNA must be replicated
Explain the relationship among
homeostasis, defective mitochondria, and the
symptoms caused by LHON.
Answer:
There is an important relationship among homeostasis, defective mitochondria, and the symptoms caused by LHON.
Explanation:
There is a great relationship among homeostasis, defective mitochondria and the symptoms caused by LHON because defective mitochondria disturbs the homeostasis in the body. If mitochondria works properly, homeostasis will be maintained whereas if there is any defect occurs in the mitochondria then the whole homeostasis will be adversely affected because mitochondria is the powerhouse of the cell responsible for the production of energy for the cell. Symptoms occurs due to Leber's hereditary optic neuropathy (LHON) also effected the state of equilibrium in the body.
The relationship among homeostasis, defective mitochondria and the symptoms caused by LHON is the following:
The power center of the cell, the mitochondria are also involved in homeostasis, the maintenance of a stable internal environment even in the face of variations in the external environment.
Mitochondrial diseases can be caused by inherited mutations in mitochondrial DNA or defects in the proteins responsible for regulating mitochondrial division, affecting the body's homeostasis.
Leber's Hereditary Optic Neuropathy (LHON) is the first disease associated with a mutation in the mitochondrial genome, specifically it produces the specific degradation of neurons involved in sending information from the eye to the brain (RGC).This disease is caused almost entirely by three mutations in mitochondrial DNA (mtDNA).The first symptoms are blurred vision, with unilateral or bilateral onset, which over time affects and / or worsens in both eyes, with loss of visual acuity and color vision.Vision loss is painless and is caused by degeneration of the optic nerve, specifically of the retinal ganglion cells (RGC).
Therefore, we can conclude that LHON is a disease associated with a mutation in the mitochondrial genome affecting the body's homeostasis.
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