Answer:
The function of cell membrane is to allow only certain substances to go in or out the cell.
only answer if you know! no spams! :)
Answer:
D. genus; species
Explanation:
For what purpose was NASA
formed by the United States in
1958?
A. building up national defense
B. repairing the country's infrastructure
C. increasing industrial efficiency
D. taking over the space program
The purpose of the formation of NASA by the United States in 1958 was D. Taking over the space program.
What was the US space program?The US space program centered on:
Solar system explorationOuter space explorationHuman spaceflightAerospace and aeronautics researchEarth science and space science.NASA was not formed for:
National defenseInfrastructure repairsIncreased industrial efficiency.Thus, NASA was formed in 1958 to oversee U.S. space exploration and aeronautics research in response to the Soviet Union's Sputnik I in 1957.
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If V is the voltage applied across a resistor R, the current flowing through it is I. Determine
the variation in values in the following cases.
Answer:
the current is directly proportional to the voltage and inversely proportional to the resistance.
Explanation:
Select the correct location on the image.
Students are having a group discussion and notice that Maria has not had a chance to introduce her thoughts.
Which student response best draws Maria into the discussion?
Is Maria even
paying attention?
Maria, what do
you think?
Don't you
agree, Maria?
Alright, Maria, will
you settle this
argument?
Is Maria even paying attention? is the student response which best draws Maria into the discussion.
What is Discussion?
This is defined as the process of talking with people about a particular subject or topic.
Is Maria even paying attention? will make her alert and more involved so as to know what is being talked about.
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Answer:
Maria What do You think
Explanation:
The Least rude Way Of saying it
Differences between the chromosphere and corona of the sun
Corona is the outermost layer whereas chromosphere is the transparent layer of the sun.
What is the differences between the chromosphere and corona of the sun?Corona is the outermost, hot shell of the atmosphere of the sun while on the other hand, the chromosphere is a transparent layer present between the corona and the photosphere.
So we can conclude that Corona is the outermost layer whereas chromosphere is the transparent layer of the sun.
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Answer:
I is a low density layer which is about 2,000km thick. It is called chromosphere because it has a red to pink colour. It is normally only visible during a solar eclipse. The corona is plasma surrounding the Sun which extends hundreds of kilometers from the surface of the Sun.
How did the conservationist John Muir contribute to the protection and management of resources in the US?
Conservationist John Muir was personally involved in the struggle to create Yosemite National Park in 1890.
What did John Muir do?John Muir played a key role in changing this perspective by proposing the preservation of natural areas with a focus on their
environmentalscientific and educational aspects.Muir recognized the importance of ecosystems and their interrelationships for the maintenance of life on the planet, while he saw man as part of the natural world, not the center of it.
With this information, we can conclude that conservationist John Muir was personally involved in the struggle to create Yosemite National Park in 1890.
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Exocytosis is a type of cellular transport that allows materials to move across the plasma membrane of a cell. Which of the statements describe properties of exocytosis?
Exocytosis uses membrane channel proteins to export materials from the cell.
Exocytosis is the primary method of transporting large molecules into the cell.
Exocytosis uses transport vesicles to export materials from the cell.
Exocytosis is the primary method of transporting large molecules out of the cell.
Exocytosis uses transport vesicles to import materials into the cell.
Exocytosis is the primary process by which materials are sent out of the cells.
What is exocytosis?Exocytosis refers to the processes by which materials produced or synthesized within cells are taken out of the cell.
The process of exocytosis is important for cell to remove wastes as well as to send substances produced in specific cells to where they are needed.
The properties of exocytosis include
Exocytosis uses membrane channel proteins to export materials from the cell.Exocytosis uses transport vesicles to export materials from the cell.Exocytosis is the primary method of transporting large molecules out of the cell.Therefore, exocytosis is the primary process by which materials are sent out of the cells.
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What is the Punnett square for ocular albinism?
Answer:
genetic condition that primarily affects the eyes. Explore symptoms, inheritance, genetics of this condition
How can inheritance of traits affect a crop’s ability to survive disease?
Dichotomy means_____.
A to cut into two parts
B two classifications
C to separate equally
Answer:
B
Explanation:
Dichotomy is a division or contrast between two things that are or are represented as being opposed or entirely different.
Explain the interaction of photosynthesis and cellular respiration using two organism and it has to be focusing on the movement of carbon?
Answer:
plants doing Photosynthesis give off oxygen for a human to use in cellular respiration vise versa
Explanation:
What is the defrence between animal sharp and round ears?
It's also known as the pinna or auricle. The outer ear's shape helps to collect sound and direct it inside the head toward the middle and inner ears. Along the way, the shape of the ear helps to amplify the sound — or increase its volume — and determine where it's coming from.
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A fly has two alleles for the color of its eyes. The green allele is recessive, and
is represented by q. The blue allele is dominant, and is represented by p. If 44
of 100 organisms are green, what is p?
Homozygous dominant+ Heterozygous + Homozygous recessive = 1
↓↓↓
p²+ 2pq+q=1
A. 0.66
B. 0.56
C. 0.44
D. 0.34
Answer: D. 0.34
Explanation:
The Hardy-Weinberg Principle is a theory in biology that represents populations of organisms that don't experience any changes in genotypic frequency from generation to generation. These populations must meet the following conditions:
No genetic mutationsCompletely random matingNo gene flowNo selection (natural or artificial)An infinite population sizeIf a population meets these criteria, its genetic and allelic frequencies will remain constant and the population will be in Hardy-Weinberg Equilibrium. However, it is not possible for this to occur in nature, because at least one condition will always be violated in natural populations.
Hardy-Weinberg EquationsThere are two important equations to use when doing problems like this. The first is p + q = 1. It represents the allelic frequency of the population.
p = the frequency of the dominant alleleq = the frequency of the recessive allele
The second equation is p² + 2pq + q² = 1, which shows the predicted frequencies of the three possible genotypes.
44 of our 100 organisms are green, and we know that to be green, they must have a homozygous recessive genotype (gg). That means that the frequency of homozygous recessives (q²) = 44/100 or 0.44. Since we have q², we can just take the square root to find q.
[tex]\sqrt{q^2}[/tex]= [tex]\sqrt{0.44}[/tex]
q = 0.66
Now, we can plug q into our first equation, p + q = 1.
p + 0.663 = 1
p = 0.337, or about 0.34
To make sure these are right, we can plug them into the Hardy-Weinberg equation to check!
p² + 2pq + q² = 1
(0.34)² + 2(0.34)(0.66) + (0.66)² = 1
0.1156 + 0.4488 + 0.4356 = 1
1 = 1
How does adaptation affect the diversity of a species?
Answer:
Explanation:
When an organism specie develops special adaptation over a period of time usually more than a year, it is to help the organism to withstand the unfavorable conditions in its ecosystem, it could also help to enable better survival for the given species.
It could also help to enable better reproduction and overtime it could lead to evolution of a specie.
Which statement best describes how Watson and Crick's model used other scientists' work to create a model of DNA?
Which statement best describes how Watson and Crick's model used other scientists' work to create a model of DNA? They used Chargaff's rule to determine that it contains ribose sugar. They used Franklin's photo to determine that DNA was a double helix. They used Levene's work to determine the number of base pairs in each strand. They used Nirenberg and Matthei's studies to determine that DNA is made of nucleotide
The statement best describes how Watson and Crick's model used other scientists' work to create a model of DNA.
A) They used Chargaff's rule to determine that it contains ribose sugar.
B)They used Franklin's photo to determine that DNA was a double helix.
How, explain your answer briefly?Watson and Crick used pieces of information available from different researchers such as Chargaff's rules and Franklin.
Chargaff had explained that the four kinds of nucleotides are present in a DNA molecule in such a manner that 2 types of nucleotides were always present in the same amounts and the other 2 types of nucleotides were also always present in the same amounts.
The first X-ray picture of DNA, created by Rosalind Franklin using a technique known as X-ray crystallography, which led to Watson and Crick's model of DNA. It explained the helical shape of the DNA molecule.
Thus, The correct statement is-They used Chargaff's rule to determine that it contains ribose sugar. They used Franklin's photo to determine that DNA was a double helix.
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Similar plant and animal fossils
have been found on continents
that are now separated by an
ocean. Why is this significant?
A. It gives evidence that the continents never
were connected.
B. It gives evidence that the continents used to
be connected.
C. It proves that the continents never were
connected.
D. This discovery does not help scientists in any
way.
what type of nitrate helps algae grow?
Answer:
potassium nitrate (KNO3)
Explanation:
Glycogen is an energy-storage molecule in humans. A hormone that is called insulin controls the storage of glycogen in the liver. Insulin is made up of amino acids.
Which statement correctly identifies the types of macromolecules that are described?
Glycogen is a protein, and insulin is a lipid.
Glycogen is a protein, and insulin is a protein.
Glycogen is a carbohydrate, and insulin is a lipid.
Glycogen is a carbohydrate, and insulin is a protein.
The statement "Glycogen is a carbohydrate, and insulin is a protein" correctly identifies the types of macromolecules that are described. Thus, the correct option is D.
What is the main function of Glycogen?The main function of glycogen is to control the release of glucose into the blood when the condition is glucose deficient. It is the liver that directly contributes to the release of glucose into the blood.
Insulin is a hormone that is made up of amino acids, hence it is a small protein that contains almost all structural features of proteins.
Glycogen is a complex carbohydrate that can easily and rapidly coverts the form of glucose into energy.
Therefore, the correct option for this question is D.
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Support irnas claim,using two pieces of evidence from the scientists experiment,figures 1 through 7, and both tables. Explain why each piece of evidence supports your claim
Irina's claim is not found here but evidence from an experiment might include the amount of a product (chemical) or the order of nucleotides (biological evidence).
What is scientific evidence?Scientific evidence refers to the observations that can be used to support (or reject) a working hypothesis.
Scientific evidence is variable depending on the field but it is always collected by observational or experimental procedures.
In conclusion, Irina's claim is not found here but evidence from an experiment might include the amount of a product (chemical evidence) or the order of nucleotides (biological evidence).
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Species evolve useing what process
A evolution
B natural selection
C acquired characteristics
D surprise
Answer:
b
Explanation:
Which trait is controlled by a dominant allele and which is controlled by the recessive allele?
Answer:
Purple Flowers
Explanation:
It is because purple flowers are the dominant over the white flowers so it will end up as purple
which of these describes the gulf stream
Answer:
The Gulf Stream is formed from the convergence of the North Atlantic Equatorial Current bringing tropical water from the east, and the Florida Current that brings warm water from the Gulf of Mexico . The Gulf Stream takes this warm water and transports it northwards along the U.S. east coast . As a western boundary current
Which of the following statements about the stomach is true?
O
Pepsins are the digestive enzymes that enable the stomach to break
down proteins.
O
Amylase is the pasty substance that's created when stomach enzymes
and food mix together.
O
The stomach receives chyme from the esophagus, which it turns into
bolus before passing it on to the small intestine.
The stomach processes nutrients, absorbs water and removes any
toxins created during chemical digestion.
Dietary fats, specifically cholesterol, have been given a bad image in the popular media; however, they are essential for energy storage and for use in building new cells. If dietary fats were removed entirely, what portion(s) of the cell would be most affected and why?
Dietary fats are necessary for providing energy to your body and supporting cell activity. They also aid in the protection of your organs and the preservation of your body's heat. Fats aid in the absorption of certain nutrients and the production of key hormones.
What is cholesterol?Cholesterol is a waxy, fat-like molecule found in all of your body's cells. Cholesterol is required by your body for the production of hormones, vitamin D, and chemicals that aid digestion. Your body produces all of the cholesterol that it requires.
Fatty acids provide an ideal anisotropic solution for other membrane constituents due to their existence in bilayer membranes. They give the membrane bilayer fluidity, allowing membrane-bound receptors, enzymes, and other proteins to diffuse laterally along the bilayer membrane's surface.
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Research into nuclear fusion will likely require a large investment of time and money before it might be used as an energy source.
Which statement best describes the benefits that would make the investment worthwhile?
Fusion requires a large amount of energy and occurs in stars.
Fusion produces large amounts of energy, and the fuel is found on Earth.
Fusion produces no radioactive waste, and the fuel is plentiful.
Fusion requires little energy to begin and would continue through a chain reaction
The statement best describes the benefits that would make the investment worthwhile is Fusion produces no radioactive waste, and the fuel is plentiful, which means letter C.
What is nuclear energy?Nuclear or atomic energy is the energy produced in thermonuclear plants, which use uranium and other elements as fuel. The working principle of a nuclear power plant is the use of heat to generate electricity.
Some of the advantages of this energy is abundance of uranium, as an essential element in the production of nuclear energy and no use of fossil fuels.
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Select all that apply
Chromosomes ___?
A. Are located in the nucleus
B. Occur in numbers that are the same for all organisms
C. Occur in numbers that are the same for all members of a certain species
D. Are organized into karyotypes for scientists to analyze
E. Are rod shaped structures that contain DNA
Answer:
A
Explanation:
A structure found inside the nucleus of a cell. A chromosome is made up of proteins and DNA organized into genes. Each cell normally contains 23 pairs of chromosomes.
Answer:
A
Explanation:
A structure found inside the nucleus of a cell. A chromosome is made up of proteins and DNA organized into genes. Each cell normally contains 23 pairs of chromosomes.
The point on Earth's surface that is directly above where an earthquake begins is the _____.
The location below the earth's surface where the earthquake starts is called the hypocenter, and the location directly above it on the surface of the earth is called the epicenter
Do mutations always lead to evolution? (1 point)
A. O No, because some mutations happen in body cells, so they are not passed on.
B. No, because most mutations lead to death of the organism.
C. Yes, because mutations create adaptations that give a competitive advantage.
D. Yes, because there would be no change in populations without mutations.
Answer:
B
Explanation:
Mutations are a way different option from the original genomes, a mutation is a change within the genes and can mostly lead to the death of organisms. But only MOST of them lead to death which is why B is correct.
Drag each tile to the correct box. Not all tiles will be used. One statement is an example of a scientific observation. Another statement is an example of a scientific explanation. Identify the correct statement for each category to illustrate how scientific explanations are inferred from scientific observations.
Statements 1, 3, and 6 are scientific observation while statements 2, 4, and 5 are scientific explanation.
What is a scientific observation?A scientific observation can be defined as an active acquisition of knowledge (information) through one of the sense organs, while using scientific tools and instruments.
In this scenario, some examples of a scientific observation are:
"Cloning has the potential to significantly benefit a great many people, so it should not be considered immoral or risky.""The age, type, and composition of ancient rocks in western Africa are nearly identical to the age, type, and composition of rocks in eastern South America.""The rocks present in western Africa and eastern South America formed at the same place and at the same time."What is a scientific explanation?A scientific explanation can be defined as a type of statement that is used to provide adequate information on the reason for an event, process or phenomenon, especially after drawing an inference.
In this scenario, some examples of a scientific explanation are:
"The cloning of organisms is an exciting area of study, and more resources should be be devoted to it.""Even if modern organisms are found in ancient portions of the fossil record, this wouldn't challenge the theory of evolution in any way.""A scientist thinks that he might find serious inconsistencies in the fossil record if he conducts an excavation in a new location."Read more on scientific observation here: https://brainly.com/question/24137634
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What would the most accurate model for the theory of evolution look like?
Answer:
Comparing DNA
Explanation:
Darwin could compare only the anatomy and embryos of living things. Today, scientists can compare their DNA. Similar DNA sequences are the strongest evidence for evolution from a common ancestor.