Purines and primidens are the two types of nitrogens.basis in nuclic acid,breifly explain both of them
Answer:
Pyrimidines
Uracil = 2,4-dioxy pyrimidine
Thymine = 2,4-dioxy-5-methyl pyrimidine
Cytosine = 2-oxy-4-amino pyrimidine
Orotic acid = 2,4-dioxy-6-carboxy pyrimidine
Polynucleotides
Nucleotides are joined together by 3'-5' phosphodiester bonds to form polynucleotides. Polymerization of ribonucleotides will produce an RNA while polymerization of deoxyribonucleotides leads to DNA.
https://library.med.utah.edu/NetBiochem/pupyr/pupy15.gif
Explanation:
Write "A" next to words that can describe abiotic factors. Write "B"next to words that can describe biotic factors.
Answer:
Wind- A
Sunlight- A
Deer- B
Soil- A
Sunflower- B
Water- A
Fungus- B
Snow- A
Eagle- B
Temperature- A
Explanation:
In an ecosystem and biology as a subject, environmental factors are either biotic or abiotic. BIOTIC FACTORS are those factors that involves living organisms i.e. factors that have life in them. For example, the biotic factors denoted as 'B' in this question are deer, sunflower, fungus, eagle which are all under plant, animal or microbes category.
On the other hand, ABIOTIC FACTORS are factors that involve non-living or inanimate objects i.e. factors that have no life in them. For example, the abiotic factors denoted as 'A' in this question are wind, sunlight, soil, water, snow, temperature etc.
Answer:
wind- A
sunlight- A
deer- B
soil- A
sunflower- B
Water- A
fungus- B
snow- A
Eagle- B
temperature- A
Explanation:
Movement of individuals into a population is referred to as:
emigration
death
immigration
population density
Is there any difference in the time of sunrise during summer ans winter?
Answer:
yes winter time sunrise exactly time but winter time you can't see sun
An energy pyramid shows the flow of energy and biomass from one trophic level to another. The amount of available energy that can be moved from the producer to the consumer is approximately
a. 90%
b. 25%
c. 100%
d. 10%
Answer:
b 25%
Explanation:
because it is............
16.In which phase is the substance at 20 °C and 0.75 atm?
solid
liquid
vapor
all of the above
Answer:
solid
Explanation:
This specialized cell controls gas exchange and water loss in a plant. It is found on the under-side of leaves. This structure is called a — Question 15 options: chlorophyll cell chloroplast cell stomata; guard cell
Answer:
stomata
Explanation:
i think the guard cells do control gas exchange and water loss..but these cells are found in the stomata...in the under side of the leaf
Answer:
Stomata
Explanation:
Stomata are tiny openings or pores in plant tissue that allow for gas exchange. Stomata are typically found in plant leaves but can also be found in some stems.
68. Blue-green algae belong to the same Linnaean kingdom as bacteria. Which of the
following characteristics do these organisms have in common?
O They cause disease.
O They are autotrophs.
O They are prokaryotic.
O They are multicellular.
Calculator
Answer:
Multicellular
Explanation: used quizziz
Of the options listed, "They are prokaryotic" and "They are not multicellular" are characteristics that both blue-green algae and bacteria share.
What are blue green algae?Blue-green algae, also known as cyanobacteria, are a type of bacteria that are capable of performing photosynthesis. This makes them unique among bacteria, as most other bacteria do not have the ability to produce their own food in this way. As a result, blue-green algae play an important role in the carbon cycle and contribute to the production of oxygen in the Earth's atmosphere.
Blue-green algae can be found in a variety of environments, including fresh and salt water, soil, and rocks. Some species are free-floating, while others form colonies or filaments. In certain conditions, such as nutrient-rich water or high temperatures, blue-green algae can grow rapidly and form blooms, which can have negative impacts on aquatic ecosystems and human health.
Despite their classification as bacteria, blue-green algae have a number of characteristics that are more similar to algae than to other bacteria, which is why they are sometimes referred to as "blue-green algae."
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What disease caused by a virus is vaccinated against with a new vaccine every autumn and winter?
Answer:
Influenza
Explanation:
Different strains appear every year, so the vaccine changes.
Influenza of flu is the viral infection for which a person should be vaccinated every autumn and winter. This is because the virus has been identified to have different strains.
What is Viral infection?Viruses are the unicellular organisms with genetic material either DNA or RNA which is surrounded by a protein coat. Many of the viruses are found to be pathogenic for humans.
Influenza virus is one of them. Influenza (flu) vaccines (also called as “flu shots”) are vaccines that protect against the influenza virus strains that are most common during the season. Generally, most of the flu vaccines are “flu shots” which are given with a needle in the arm, however there is a nasal spray flu vaccine as well.
Influenza (flu) is a contagious respiratory illness caused by influenza virus that infect the respiratory tract. People who are immunologically compromised or are in certain health condition are found to be more vulnerable to this virus.
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The energy that organisms use for supporting life processes such as movement and reproduction are released into the ecosystem as what type of energy?(1 point)
chemical
heat
radiant
nuclear
Question: "The energy that organisms use for supporting life processes such as movement and reproduction are released into the ecosystem as what type of energy?"
Answer: "Heat energy is used by organisms for supporting life processes, including movement and reproduction. Hence, Option B is the correct choice."
Heat energy is the degree of internal energy contained in an organism and is released into the ecosystem.
What is heat energy?Heat energy is what generates the internal and random movement of the particles of a body.
Characteristics of heat energyOrganisms constantly release heat energy.This energy is renewed through the consumption of food, which contains the calories that allow us to continue emitting that energy as long as we live.Therefore, we can conclude that the temperature of an organism and its ability to generate life processes such as movement depend on its heat energy.
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mixing of pure and impure blood is prevented by what??
Answer:The Pulmonary Valve
Explanation:
Hello Beautiful People!
I was wondering if anyone had made a study guide for the Cambell Biology textbook
Using the graph below, what does 'K' represent?
3
k
population
2
time
Death rate
Exponential growth
Ecosystem decline
Carrying capacity
Answer:
Explanation:
I can't help u cause there is no graph
How long does it take to make paper out of cow manure? I only need a direct answer please.
Answer:
a few hours to a few days
Explanation:
Reports that a process can exist do not mention the time involved.
In an industrial process, the length of time likely will be dominated by cleaning, bleaching, and drying times, which could be hours to days. Full-scale production would likely be more efficient if time is shorter. If "appropriate technology" is used, time could run to several days.
Answer:
A few hours to a few daysExplanation:
* A long time that taes to mae paper out of cow manure.
Which amino acid will be carried to a ribosome by a transfer molecule contining the anticodon AAA?
HELP 25 POINTS AND BRIANLIEST IF CORRECT
Thoroughbreds are an example of a type of horse that results from selective breeding. However, not all thoroughbreds have the traits that are most desired. How has the process of selective breeding increased the probability that the horse will have a desired trait? Use information from the stimulus material and your knowledge of science in your answer. In your answer, be sure to:
Explain how selective breeding increases the probability that offspring will have a desired trait.
Explain why not all individual thoroughbreds may express the desired traits.
Answer:
If breeders Breed these horses with other breeds, the foal wont be a straight thoroughbred. So, it will change the horses breed.
Explanation:
Selective breeding increases the probability that offspring will have the desired trait because it limits narrows the gene pool to only include desired variants of a gene. Not all thoroughbreds may express the desired trait because they may inherit an unwanted variant of the gene & mutations may occur.
The traits and characteristics of an animal are determined by the genes they possess. When two animals breed, the offspring inherits one variant of each gene from both parents, known as alleles. This means that all animals have 2 variants for any specific trait.
When a gene in an allele is expressed, it means that the genetic code in that allele is the one that can be seen on the offspring. Gene variants can be classified based on how likely they are to be expressed as:
Dominant RecessiveWhen one allele is expressed and the other is not, it is because that allele is dominant and the other is recessive. Recessive variants for a gene will only be expressed if both alleles inherited by the offspring possess are recessive. dominant genes are symbolized by a capital letter and recessive genes with a lower-case letter.
Selective breeding is used to continuously breed animals that have similar variants of the desired trait. If breeding were to be natural, then many of what we consider desirable traits may be lost behind the expression of common, more dominant genes. Selective breeding is done by narrowing the gene pool, meaning that we only allow breeding between animals known to possess the desired trait.
Not all thoroughbreds may express the desired traits because sometimes even though a parent has the desired variant of a trait, they may also contain a different recessive or dominant variant of a trait. Since selective breeding does not control what variant exactly the offspring inherits, it does not always work with each offspring. Genetic mutations can also affect the outcome.
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describe atmosphere in ur own words pls
Answer:
read below !
Explanation:
it's basically the layers from the earth's crust, all the way out to space. there are 5 layers in all, and they all protect earth from the things in space, and the suns rays. it keep gravity in, and things like that !!
i hope this is what you meant, and that it helped!! :)
16. What finally caused scientists to accept the plate tectonic theory?
A) Ocean floor evidence of sea floor spreading.
B) Fossil evidence of supercontinents like Pangaea.
C) Magnetic pole wandering alignment of repositioned plates.
D) Matching glacier scraping patterns on the coasts of different contents.
Answer:
A)Ocean floor evidence of sea floor spreading.
Explanation:
evidence pointing to the steps or process of seafloor spreading and effective plate motion This theory was accepted by many scientist because it depended on hard evidence and could describe most of the modern geological structures such as ocean basins,
What is the tectonic theory?
The theory of plate tectonics plates says that Earth's surface is made of rigid slabs of rock, or plates, that move to each other.
What is a tectonic plate?
They are huge slabs of rock that cover the earths mantle When a earthquake occurs that's because the tectonic plate is breaking that makes the ground shake During the earthquake and afterward, the plates keep on shaking until they are stuck again!
Hope this helps!
-Tobie the dog <3
The plate tectonic theory gave the concept of land and sea formation. "Ocean floor evidence of seafloor spreading" acted as evidence to support the plate theory. Thus, option A is correct.
What is plate tectonic theory?The plate tectonic theory states about the formation of the lithosphere by the movement of the plate tectonics located deep in the mantle and core layer of the earth. These plates show movement slides over each other to produce lands and drifts to form the oceans.
At a very early there was a supercontinent, Pangaea that slowly shows the formation of the current continent by the movement of the tectonic plates. These solid hard rocks of the earth layers allowed the formation of the various land formations.
The seafloor spreading is the best evidence that supports the tectonic plate theory that described the formation of the oceanic structures including the trenches and basins. The geological structures of the ocean floors supported the theory.
Therefore, option A. evidence of seafloor spreading supported the plate tectonic theory.
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can you help me with this
Thank you
Answer:
option c is correct friend...
TRY IT Distinguish Elements Explain why there are more substances on Earth than are listed on the periodic table of elements.
Answer:
The periodic table of elements includes only elements.
Explanation:
All the materials on Earth are made up of the same elements, which can be found on the periodic table. These elements combine to form compounds, or mixtures such as water, a compound of hydrogen and oxygen, or air, which is a mixture of nitrogen, oxygen, carbon dioxide (a compound!) and many other gases, even water vapor. It is the combination of these elements in different ways that gives us so many different substances. Hope this helps!
Answer:
Explanation:
Elements are pure substances with only one type of atom.
The substances on Earth are created when two or more elements are combined.
Because elements can combine to form compounds, more substances can be created on Earth.
The reaction rate of a chemical reaction was measured with and without an enzyme. Which line is the
reaction with an enzyme?
Answer: yes they are used for particles and molcules
Explanation:
sb
The plasma membrane of a bacteria cell _____.
how does the cell cycle aid the conservation of genetic information
Explanation:
The cell cycle aids in the conservation of genetic properties by the first stage which replicates DNA from the cell or Anaphase.
Cell cycle aid the conservation of genetic information through the use of either a positive feedback mechanism or a negative feedback mechanism.
A cell cycle can be defined as an ordered sequence of events that takes place within a living cell as it grows and divide into two (2) daughter cells.
Basically, a cell cycle is made up of four (4) distinct stages and these include:
Gap 1 (G1).Synthesis (S).Gap 2 (G2).Mitosis (M).A genetic information refers to the heritable biological information that are typically stored in the base sequence of an organism's deoxyribonucleic acid (DNA) or ribonucleic acid (RNA) in certain viruses, according to their genetic code.
Generally, living cells communicate with one another by generating, transmitting, receiving and responding to chemical signals within the body of a living organism.
On a related note, cell communication is not completely perfect and as such causes genetic variation.
However, cell cycle aid the conservation of genetic information through the use of either a positive feedback mechanism or a negative feedback mechanism.
Hence, living organisms are able to transfer their genetic information from one generation to another based on the actions of cell cycle.
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Johnny pushes a toy car and lets it go. The toy car rolls and eventually comes to a stop. What opposing force makes the toy car come to a stop
HELPP MEEE PLEASEEEEEEE ANSWER THEM ALL
Answer: friction
Explanation:i am smart
In August 2010, about 500 million eggs were recalled by the government because its egg shells were contaminated with salmonella. This is an example of __________.
a.
how toxic heavy metals can enter the environment through natural processes
b.
how persistent organic pollutants do not easily break down in the environment
c.
how chemicals can change reproductive processes in organisms
d.
how thermal pollution can cause the spread of a disease
e.
how transmission of infectious diseases can be through environmental factors
Answer:
I think it's E
Explanation:
E seems to fit well. I'm taking this test right now so I'm not sure but I hope this helps. Sorry if its not :(
Answer:
E. infectious diseases
Explanation:
I am not 100% sure, but I'll tell you why if you need another's input.
Salmonella is a natural, completely biological bacteria that transmits through the fecal-oral route or by food and water. Aka, shells that have been contaminated with poop or had salmonella to begin with.
In other words, salmonella has nothing to do with any foreign/inorganic substances like the chemicals mentioned in the other answers.
When constructing an energy pyramid of the swamp ecosystem, which of these would be placed at the top of the pyramid?
Answer:
American alligator
Explanation:
How did Wegener think that continents went together?
Explanation:
Fossils of similar organisms across widely disparate continents encouraged the revolutionary theory of continental drift. He called this movement continental drift. Pangaea. Wegener was convinced that all of Earth's continents were once part of an enormous, single landmass called Pangaea.
Answer:
Wegener suggested that perhaps the rotation of the Earth caused the continents to shift towards and apart from each other. (It doesn't.) Today, we know that the continents rest on massive slabs of rock called tectonic plates. The plates are always moving and interacting in a process called plate tectonics.
Explanation:my dignity
What sequence would be on the other strand of DNA if one strand of DNA containsthe sequence TACGGATCACTAATC . Do not put spaces between the letters in your answer .
If one strand of DNA contains the sequence TACGGATCACTAATC, the other strand will contain the sequence ATGCCTAGTGATTAG.
Look at this image of a star cluster.
Which type of star cluster is shown?
o open
O binary
O globular
O eclipsing
The study of stars is called astrology.
The correct option is B.
The image shown in the figure is the main key feature for answering the question. There are two types of stars present in the image which leads to option B.
Due to the presence of two different types of stars, it is known as a binary cluster.
Hence, the correct answer is B.
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Answer:
I searched through gooogle lens and it said it was a picture of a globular cluster I put it in my test e2022 and got it right...
Explanation:
Which statement best describes bacteria?
Answer:
what are the statements
Explanation:
Answer:
Bacteria are multicellular eukaryotic organisms,which make you sick.
Explanation: