Answer:
Sebastian wants to make ball-and-stick models of the four macromolecules. He has colored balls for each of the elements in these molecules, including the following. red: hydrogen black: carbon purple: oxygen green: nitrogen For a model of which macromolecule will he need mostly black and red balls? carbohydrates lipids nucleic acids proteins
Explanation:
thers not much to explain about this but i tryed my best
Describe how to improve the function of the cell membrane
Answer:
The plasma membrane is a common cell structure found in the cell of both eukaryotes and prokaryotes. It demarks the interior environment of the cell from the external environment and has a semipermeable nature. Structurally it is composed of phospholipids and molecules of proteins. The material which accounts for the rigidity of the plasma membrane is cholesterol; molecules of cholesterol are situated in the middle of phospholipid layers.
1.
Reptiles first appeared at the end of the _____ era.
Cenozoic Era
Archean era
Mesozoic Era
Paleozoic Era
Reptiles first appeared at the end of the Paleozoic Era. Thus, option D is correct.
What are reptiles?Reptiles first appeared during the Paleozoic Era. The Paleozoic Era occurred around 542 to 251 million years ago. More specifically, reptiles first appeared in the Upper Carboniferous Period known as the Pennsylvanian Period, which was from 323.2 to 298.9 million years ago.
Emergency procedures are processes that needs to have a quick action to arrive at a fast resolution. But it must still be conducted in an orderly manner. An elective procedure is a planned surgery. It is subjected to choice or election.
During the early period of the Paleozoic era (The Cambrian), there existed marine living organisms (phyla). During the Paleozoic era, volcanic activity was experienced. Lastly, the Paleozoic era was a geologic period that was prone to erosion and deposition of marine fossils.
Therefore, Reptiles first appeared at the end of the Paleozoic Era. Thus, option D is correct.
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Why is manure unreliable fertilizer
The reasons why manure is an unreliable fertilizer include;
the nitrogen content may not be highit can reduce the nitrogen level of soil.What are fertilizers?Fertilizers are substances that when added to the soil improves the nuttrient content and fertility of the soil.
There are two types of fertilizers;
synthetic ferilizers - these are artificially manufacturedorganic fertilizers - these are obtained from lthe living environment e.g. manure.Manure is obatined from dropping of animals and decayed or decaying plants.
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The diagram shows the structure of an organic molecule. A student
identifies the molecule as DNA. Does the student identify the
molecule correctly?
-phosphorus
-pentose
sugar
nucleoside
G
U
C
_nitrogenous
base
OYes. It is a single stranded molecule.
O No. It contains a five-carbon sugar.
No. It contains the nitrogenous base uracil.
OYes. It has a sugar-phosphate backbone.
Answer: No. It contains the nitrogenous base uracil
Explanation:
DNA does not contain Uracil. Uracil is used by RNA in place of Thymine.
What happens when the calf liver DNA preparation is digested with EcoRI? What does this tell you about the number and distribution of EcoRI sites in the calf chromosomes?
Answer: It is cut open so they can
Explanation:
When calf liver DNA is digested with the restriction enzyme EcoRI, the enzyme will cut the DNA at specific recognition sequences.
EcoRI recognizes and cuts the DNA at the palindromic sequence 5'-GAATTC-3', where the caret (^) indicates the cut site:
5'-G ^ AATTC-3'
The result of the EcoRI digestion will be the formation of DNA fragments with varying lengths, depending on the location of the EcoRI sites in the calf liver DNA.
The number and distribution of EcoRI sites in the calf chromosomes can be determined by analyzing the pattern of DNA fragments produced after the digestion. This technique is called Restriction Fragment Length Polymorphism (RFLP) analysis.
If there are more EcoRI recognition sites in the calf liver DNA, the digestion will result in smaller DNA fragments. Conversely, if there are fewer EcoRI recognition sites, larger DNA fragments will be generated. By running the digested DNA fragments on an agarose gel and comparing the fragment sizes to a DNA marker with known sizes, it is possible to determine the number and approximate locations of EcoRI sites in the calf chromosomes.
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54. The table shows the composition of the urine of four people.
Which person is most likely to be suffering from kidney failure?
person urea content of urine
high
high
low
low
A
13
10
D
water content of urine
low
high
low
high
Why is it important that a pure water IV not be given to dehydrated patients?
Pure water IV is not given to a dehydrating patient because our circulation already includes some salt, IVs also contain saline, a solution of water and salt that is almost isotonic with blood. Water flows from a high concentration to a low concentration, preventing the cells from exploding.
What would happen if you injected pure water into a patient?Patient would pass away. The cell would rupture owing to osmosis because of the disparity in salt content between the interior and exterior. In order to establish an isotonic state, the water would exit the cell and switch from the less concentrated inside to the more concentrated outside, killing the cell and ultimately the patient.
Hence, Continuous monitoring is necessary when receiving a saline water IV injection to make sure the IV solution is giving the patient the proper amount of fluids and minerals.
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What are the genotypes and phenotypes of the F2 generation?
Genotypes:
Phenotypes (colors of snapdragons):
There are four phenotypes and nine genotypes in the F2 generation.
In Mendel's dihybrid cross, two traits were in consideration for the F2 generation. In this dihybrid cross, for the seed color and seed type, he crossed two homozygous varieties, round yellow-seeded plants that are dominant RRYY with wrinkled green-seeded plants that are recessive rryy.
After the cross, the product obtained is round yellow, round green, wrinkled yellow, and wrinkled green seed.
So, the 9 genotypes are
RRYY, RRYy, RrYY, RrYy for round yellow phenotype
RRyy, Rryy for round green phenotype
rrYY, rrYy for the yellow wrinkled phenotype
rryy for the green wrinkled phenotype
For genotypic and phenotypic ratio is 1:2:1
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Look at this map of current volcano hazards. Click a few volcanoes to determine their warning levels. Why is it possible to have a warning system for volcanoes? If you were a volcanologist, would you watch certain volcanoes on the map more than others?
It is possible to have a warning system for volcanoes because most volcanoes issue warnings before erupting.
As a volcanologist, certain volcanoes on the map will be monitored more than others because some volcanoes are more explosive than the others.
Why do volcanologist monitor volcanoes?Monitoring volcanoes enables volcanologist to understand its activities during an unrest through seismicity, deformation and degassing. Some volcanoes are explosive while others are not so the volcanologist has to monitor the type of magma that flows from it.
The volcanologist also uses the map as an indicator to know when any volcano is scheduled to erupt because some volcanoes provide warnings before eruption.
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Answer:
By examining the pace of change in the gases released, the rate of change in seismic activity, the rate of change in ground deformation, and other variables, a volcanic eruption can be predicted. These are early warning indicators of an eruption. Volcanologists should concentrate on Kilauea and Shishaldin when studying the map because these two volcanoes are at the watch alert level and are more likely to erupt.
What experiences had Wallace had as a naturalist before traveling to the Malay Archipelago?
Wallace came to the conclusion that new species emerge near closely related species based on his observations of species inside the Malay Archipelago and the Amazon.
what are the some examples of species?The ecological species concept, which defines a species as an organism group framed by the resources they depend on (otherwise known as their ecological niche), as well as the genetic species concept, which assumes that all organisms are capable of inheriting traits from each other within a common gene pool, are two examples.
Which definition of "species" is the most accurate?A group of living things that can naturally breed with each other and generate children that are fertile is commonly referred to as a species. It can be challenging—even contentious—to classify a species, though.
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6) What is the inorganic compound that is included in the
structure of DNA building unit? ?
Ribose sugar.
Phosphate group.
Thymine base.
O Deoxyribose sugar.
Inorganic compound that is included in the structure of DNA building unit is Phosphate group
An inorganic compound is the substances that does not contain both carbon and hydrogen and a great many inorganic compounds do contain hydrogen atoms and such a water and hydrochloric acid produced by your stomach and the sugar in the DNA molecule id deoxyribose and the one RNA ribose sugar and this is the phosphates based on the inorganic compound phosphoric acid means H₃PO₄ and they react with the sugar in the nucleotides to form ester bond
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A student is constructing a model to illustrate the levels of organization for life on Earth.
Which description would be the best to add to the model for level 3?
Responses
1: Population; 2: Biome;3: Ecosystem
Population refers to the number of people in a state. Biome is a large area characterised by it's vegetation, soil,climate, and wildlife. Ecosystem is a geographic area where plants, animals and other organisms exists.
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What two abiotic factors must be present in order for gypsum to form
The two abiotic factors that must be present in order for gypsum to form are that they have essential effects on dessert and the environment. In general, gypsum is made of many abiotic components. Abiotic components such as temperate deserts, and subtropical deserts.
One type of saline soil is formed by Gypsum. Gypsum is a soft, chalky mineral composed of calcium sulfate [tex]CaSO_{4}[/tex] and water [tex]H_{2} O[/tex]. Here spatial variability means it maintains the even layer of the soil its decomposition and can develop the soil moisture. Gypsum is a nonclastic rock and transparent mineral. Deserts can be categorized by their low mean rainfall, even though it is just as essential to calculate the temporal and spatial variability in yearly rainfall. Gypsum is made up of oxygen [tex]O_{2}[/tex], sulfur S, calcium Ca, and water [tex]H_{2} O[/tex].
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Select the correct answer from the list: water, gravity, wind sink break apart rise metamorphic igneous sedimentary
Answer:
Cooling can cause magma within Earth to solidify resulting in the formation of igneous rock.
Hope this helps :)
Chlorophyll a and bare
examples of what inside.
a chloroplast that
absorbs light energy?
A. Chloroplasts
C. White light
B. Thylakoids
D. Pigments this
Answer:
D. Pigments
Explanation:
Chlorophyll contains pigments (650; 700) which absorbs light
The cactus has a specialized fleshy stem that is specialized to store water for long periods of time. Which plant tissue most likely makes this action possible?
apical
dermal
ground
vascular
Answer:
dermal
Explanation:
the dermal because is the most external tissue of the plant an with the thorns they can collect the water and then during the drought they can use these water
Which of the following contain organs?
Choose 2 answers:
(Choice A)
A
organism
(Choice B)
B
cell
(Choice C)
C
organ system
(Choice D)
D
tissue
Answer:
organism and organ system
Explanation:
it has organ in both,
an organism is a living thing
organ system is a bunch of organs filed into a system in your body to do functions basically
pretty self explanatory.
There is iron in Hawaiian rocks. What does the presence of Iron tell scientists?
According to Humayun's hypothesis, chemical reactions between rock and liquid metal at the Earth's core-mantle border are what caused the extra iron to enter the mantle.
How iron is found in Hawaiian rocks?According to research by Professor Munir Humayun, the Earth's mantle beneath Hawaii has a higher iron content than other parts of the mantle. Hot plumes of solid rock from the core-mantle barrier or the deep mantle rise at rates of a few centimeters per year to form hotspot islands, such as Hawaii.
Seismologists have long hypothesized that the deep mantle of the Earth, which is the rocky layer 1,000 to 3,000 kilometers below the Hawaiian Islands, has a higher percentage of iron, but no one has ever exactly tested it, according to Humayun. One of the four primary elements that make up the mantle is iron.
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Which of the following distinguishes the first step of waste disposal, no matter the system?
Responses
gather
use
transport
treat
Answer: it is gather
Explanation:
Answer: The correct answer is gather
Explanation: This answer has been confirmed correct.
The steps for waste disposal (in order) are; gathering, storing, treating, transporting, and using.
What element is changed by lightening into a form that plants can use?
Answer:
nitrogen fixation
Explanation:
Nitrogen in the atmosphere can be transformed into a plant-usable form, a process called nitrogen fixation, by lightning. Each bolt of lightning carries electrical energy that is powerful enough to break the strong bonds of the nitrogen molecule in the atmosphere.
Submit your answer from Exam Activity 18-1 that infers why humans would not be able to repair and grow muscle without bacteria.
They would not be able to grow muscle without bacteria because bacteria is unicellular microorganisms which have cell walls but lack organelles and an organized nucleus, including some that can cause disease.
What is the relation between human and bacteria ?To mention a few functions, the bacteria in our systems help break down the food we eat, assist us access nutrients, and neutralise toxins. Additionally, by shielding colonised surfaces from encroaching pathogens, they contribute significantly to the fight against diseases.
Muscle mass can be impacted by the metabolites that gut bacteria create. Short-chain fatty acids are a class of metabolites that can accomplish that, they are created when bacteria ferment dietary fibre, and they have been demonstrated to boost muscle mass.Learn more about Human Bacteria relationship here:
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How can Earth's layers be defined? Select the two correct answers
by their amounts of land area
by their physical properties
by their chemical compositions
by their temperatures
by their thickness
It is possible to define the layers of the earth using the information below:
in accordance with their chemistry.
based on their physical characteristics.
So, choices A and B are the ones that are appropriate for this inquiry.
What distinguishes the earth's various layers?In general, there are four major strata that make up the earth's structure. According to them,
The crust.
The mantle.
The outer core.
The inner core.
The layers indicated above all have different chemical makes up. When characterizing the many strata of the earth, factors such as the physical state and chemical makeup are equally significant. Iron and a little amount of nickel are both found to be most abundant in the core regions.
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There are three plants, A, B, and C. Plant A is placed in a solution of the same solute concentration as that of the plant's cells, plant B is
placed in a solution of a higher solute concentration than that of the plant's cells, and plant C is placed in a solution of a lower solute
?concentration than that of the plant's cells. A cell of each plant is examined under the microscope. Which plant has the most tense cell walls
[tex]{ \: \: \: \: \: \: \: }[/tex]
Plant A is present in an isotonic solution; plant B is present in a hypertonic solution; and plant C is present in a hypotonic solution. The most tense cell out of three is cell C, which is present in the hypotonic solution as water goes into the cell.
What is a hypotonic solution?
The cell present in a solution can either take or lose water, and that depends upon the outside solute concentration or water potential. The plant cell A is present in the solution at an equal concentration of solutes, which means that the water potential is the same at both ends, that is, outside and inside, preventing any flow of water.
In plant B, the outside solution has more solutes than the water, so it has less water than that of the cell, and in this case, water will flow from the cell to the outside, resulting in a decrease in cell size. In cell C, the solution has low solutes, which means high water, so in this case, the water will flow from the outside to the inside and make the cell swell and more pressure on the cell wall.
Hence, cell C has a more tense cell wall.
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Which letters from the image contain genetic information? Hint: Choose multiple answers
The letters from the image that contain genetic information include C, D, and E.
What are genetic information?Genetic information are information present in the cells of organisms that dictate the physical traits of organisms. In other words, genetic information are information present in the cells of living organisms that dictate what the organisms will look like.
The genetic information of living cells are usually stored in the DNA os organisms. These DNAs are made of sequences of nucleotides, with a particular nucleotide sequence representing a gene.
The DNA are packaged and arranged as chromosomes in living cells.
Now, looking at the image, C indicates the genetic materials of the cell where the genetic information are stored. A closer look at C shows that it is made of chromosomes. Each chromosome consists of double helix DNA (D) that is made up of complementary nucleotide bases (E).
In other words, C, D, and E contain the genetic information of the cell.
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People who get better grades in school will be more successful in life. agree or disagree
response must be at least 5-7 sentences in length.
There is no conclusive connection between achieving high academic standing and having a high income.
Can you succeed if you don't get good grades?The truth is that grades are really not that significant. Regrettably, valedictorian status doesn't carry much weight in the actual world. After having less than outstanding academic careers, some of the world's most successful individuals have gone on to have amazing careers in business and public life.
Are grades crucial to success?When it comes to getting into college, high school grades are most important. When considering whether to admit or reject a student, institutions may take into account their grade point average (GPA). Your college grades are even more crucial if you plan to enroll in graduate or professional school.
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what organelle makes carbon dioxide?
Answer:
Mitochondria
Explanation:
The organelle that will use up oxygen and give off carbon dioxide and water is the mitochondria. The mitochondria is a membrane bound organelle used by eukaryotic cells to carry out cellular respiration.
PLEASE MARK AS BRAINLIEST!!!Answer: The answer to that would be mitochondria.
The mitochondria is an organelle used by eukaryotic cells to help carry out cellular respiration.
We just reviewed this in my science class but I'm not that sure if it's what you were looking for!!!
african savanna elephant chance of survival
Individuals of a population group together in clusters or groups. This is often found in schools of fish, patchy habitats, or trees with heavy seeds that drop directly to the ground.
A. Clumped
B. Random
D. Uniform
Answer: It is A
Explanation: It's A because clumped , individuals are clustered in groups
After an experiment, Monica creates a graph that shows a direct linear relationship between the size of a fish and the amount of oxygen the fish uses. Describe this trend in terms of the amount of oxygen that a fish would use us as it grows from being very smart very large
Increase in the metabolic activities of the fish necessitated the increase in the consumption of oxygen hence the straight line graph.
What is an experiment?We know that when we carry out an experiment, the aim of the experiment is so that we can be able to deduce the nature of the relationship that is seen to exist between two variables. The variables are the independent and the dependent variables. The dependent variable is directly affected by the independent variable as it changes.
We are also told that what we have here is a straight line graph. This implies that the amount of oxygen that the fish was using was increasing as the age of the fish was increasing. This is what has accounted for the straight line graph.
Now we can see that the reason why we have a straight line graph is that the metabolic activities of the fish was increasing as the age of the fish was increasing thus it had to take in more of the oxygen.
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what does c 2h o stand for and what is the ratio between them
The simplest aldehyde, formaldehyde, has the chemical formula CH2O and is composed of hydrogen, carbon, and oxygen. Because of the 2:1 ratio of hydrogen to oxygen atoms in the formula CH2O, a carbohydrate can be identified.
Is water a sugar?The typical molecular formula for carbohydrates is (CH2O)n. These are the simplest carbohydrates and are needed as energy sources because they are both essential components of living things and fuel molecules. Perhaps glucose and fructose are the ones that people are most familiar with.
A carbohydrate is CH20?A monosaccharide has the generic formula (CH2O)n. Since monosaccharides are the simplest type of carbohydrates, they cannot be hydrolyzed or divided into other types of carbs.
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