Answer:
Natural selection is process that allow organism that has suitable attributes with its environment, to thrive (grow in population), to survive, and to pass its genetic information to the next generation (children, grand children).
Explanation:
For example: in an island, a male giraffe, and a female giraffe produce giraffe children with various attributes. Some giraffe children have short neck, and some have long neck.
Giraffe eats the leaves of Acacia tree, and Mimosa tree. Many acacia tree and tall mimosa tree in that island, are tall trees, so a giraffe that has long neck can reach that tall tree, eat the leaves, survive, and grow to adult stage.
A giraffe that has short neck, can only eat small quantity of leaves, then it suffers, can not grow, becomes skinny, and unable to compete with other giraffe finding its mate. It can't pass its genetic information to the next generation, and becomes extinct.
That's how natural selection, in above case, an island with a lot of tall acacia trees and mimosa trees selects giraffe with long neck to survive.
The next interesting follow up question would be how a male giraffe and a female giraffe produce various kind of giraffe children? The answer is a pair of chromosome become a single chromosome in giraffe sperm, and in a giraffe eggs. But that question and its answer are beyond the scope of the original question.
Which is a function of the cell membrane?
Performs photosynthesis
Controls what enters and leaves the cell
Produces proteins
Provides energy to the cell
Answer: I believe it is B.
Explanation:
The cell membrane protects the cell's interior, provides support and maintains the cell's shape. It also controls what enters and leaves the cell. I hope this helps!! :)
The cell membrane separates the intracellular space from the extracellular space. It controls what enters and leaves the cell. The correct answer is option B.
The term "plasma membrane" also refers to the cell membrane. It is the cell's outermost layer in animals. It is a membrane made of lipids and proteins that is semi-permeable. Between the outside environment and living systems, there is a plasma membrane. The plasma membrane regulates the movement of solutes and solvents between the cell and its surroundings. A plasma membrane's permeability properties include semi-permeability, impermeability, permeability, and selective permeability.
Therefore, the main function of the cell membrane is to control the entry and exit of materials in the cell. The correct answer is option B.
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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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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.
Which of these has the highest BTU content when burned?
A: Paper
B: Plastic
C: Glass
Answer:
A. Plastic
Explanation:
The heat release rate for expanded plastics is generally greater due to the relatively low density and resulting high burning rate.
Stay safe, stay healthy and blessed
Have a good day !
Thank you
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The data show that both paper grocery bags and plastic grocery bags cause
harm to the environment. As a result, the scientists who study this issue are
most likely to:
OA. change their research and include the study of materials other
than paper and plastic.
OB. alter the data on how the making of grocery bags affects the
environment.
O C. read about the work of other scientists through time in order to
find new ideas.
D. decide to let people think that neither paper nor plastic bags are
harmful.
The scientists who study this environmental harming issue are most likely to alter the data on how the making of grocery bags affects the environment. Thus, the correct option is B.
What is an environment?An environment may be defined as anything that may be present in the surrounding of living organisms and helps in their survival and reproduction.
The main focus of causing harm to the environment through plastic or paper grocery bags is that the scientist need alter the data and estimate the reason and factors for causing harm to the environment by grocery bags.
Therefore, the correct option for this question is B.
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What characteristic of the cell membranes determines what gets into the cell and doesn't?
Answer:
launamcdaniel The characteristics of the cell membrane that determines what gets into a cell and what doesn't is the properties of the phospholipid bilayer and its proteins
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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Which of the
following is the major drawback of wind energy?
•Wind machines release harmful toxins.
• Wind is a nonrenewable energy source.
•Wind machines are harmful to the environment.
•Wind machines only work when wind is blowing.
Name the plant tissue
The different types of plant tissues are:
1. Meristematic tissues - It is of three types: Apical, Lateral and lntercalary.
2. Permanent Tissue - It of two types: Simple and Complex tissues. Simple tissues are of three types Parenchyma, Collenchyma and Sclerenchyma.
Complex tissues are of two types - Xylem and Phloem.
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
What is the best way to prevent the growth of bacteria on food preparation surfaces?
The best way to prevent the growth of bacteria on food preparation surfaces is sterilization. Details about sterilization can be found below.
What is sterilization?Sterilization is the process of treating something to kill or inactivate microorganisms.
Sterilization can also be done to prevent the reproduction of microbial population.
It is a known fact that microbes are responsible for food spoilage, hence, to prevent this, it is important to kill or get rid of them.
Therefore, the best way to prevent the growth of bacteria on food preparation surfaces is sterilization.
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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.
__________ is a premature judgment or opinion that is formed without examination of the facts.
A premature judgment that is formed without facts examination is recognized as discrimination. The correct option is a.
What is discrimination?The unjust or prejudiced treatment of many groups of individuals, particularly on the basis of color, age, gender, or handicap is referred to as discrimination.
The missing options of the question are:
Discrimination.Gentrification.Stereotype.Prejudice.A premature judgment that is formed without facts examination is recognized as discrimination.
Thus, the correct option is a.
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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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What types of weather events are not yet clearly linked to climate change?
Droughts that are more frequent and severe, storms, heat waves, rising sea levels, melting glaciers, and warming oceans can all hurt animals, ruin their habitats, and disrupt people's livelihoods and societies.
What is climate change?Long-term increases in the earth's average surface temperature, as well as large-scale changes in global, regional, and local weather patterns, are caused by a considerable increase in the levels of greenhouse gases created by the burning of fossil fuels.
Dangerous weather events are growing more common and severe as climate change progresses.
Glacier melting occurs as a result of heat changes, particularly at relatively high temperatures. This is a process in which ice transforms from solid to liquid or water. Scientists have recently detected an alarming rate of glacier melting.
Unusually hot days and multi-day heat waves are a natural component of the weather's day-to-day fluctuations. Hotter-than-usual days and nights are becoming more prevalent as the Earth's temperature warms (see the High and Low Temperatures indicator), and heat waves are anticipated to grow more often and intense.
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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.
Can somebody help me with this please?
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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how mnay layers are in a earth
Answer: 244,970 lawyers in earth
Explanation: Have a noice day!
Answer:
just do your iob
Explanation:
What are muscles' contractile units that are located within the myofibrils called?
A) fasciculi B)sarcomeres
C) myofilaments
D) tendons
Answer:
Sarcomere
Explanation:
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
how are chimpanzees and sunflowers similar?
(im asking this cause i cant figure it out and im super confused and this is for my science class)
Answer:
They are similar because they are both related to each other.
Explanation:
what type of nitrate helps algae grow?
Answer:
potassium nitrate (KNO3)
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
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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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.
(hope this helps ✌)
Give two reasons-
Bacteria can be considered as a chain between animals and plants
Bacteria can be considered as a chain between animals and plants because it give benefits both plant and animal.
What is unique about bacteria?Bacteria has unique features that can benefits both plant and animal. Bacteria like Rhizobium make soil fertile for plants whereas Lactobacillus bacteria help to convert milk into curd.
So we can conclude that Bacteria can be considered as a chain between animals and plants because it give benefits both plant and animal.
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Organisms may contain up to five levels of organization within their bodies. Which level of organization is best represented by the liver?
tissue
organ
organism
organ system
Following the Industrial Revolution, there was a dramatic change in the coloring of moths near the town of Manchester, England,
in the 1850s. There were many factories in Manchester that released dark soot and pollution into the air and forests nearby. In
the 1950s, the government put air quality control measures into place. The graph shows the percent of each color variation of
peppered moths over time.
Peppered Moth Population
of Manchester
Light
moth
100%
80%
60%
40%
Dark
moth
Dark moth
Light moth
20%
0%
1850
1950
2000
1900
Year
Which statement best describes why the frequencies of dark and light peppered moths changed?
A. Pollution from the factories resulted in the widespread death of both light-colored and dark-colored moths.
B. Soot from the factories darkened trees, making dark moths harder to see and less vulnerable to predation.
C. Emissions from the factories made the sky dark, so the moths changed color to be better hidden during flight.
D. Greenhouse gases from the factories made the surrounding areas warmer, favoring light moths that reflect heat more easily.
Percent of
Population
PLEASE HELP PLEASE
Do you think this is a good way to eliminate invasive species from an ecosystem? Do you think the risks of the gene drive getting into another species are worth gaining biodiversity in an ecosystem? Explain your opinion.
Use of bioagent is a good way to eliminate invasive species from an ecosystem.
What is a good way to eliminate invasive species from an ecosystem?In my opinion, to eliminate the invasive species from an ecosystem we should find out its bioagent instead of chemical spraying because bioagent does not adversely affected the environment.
The risks of the gene drive getting into another species are not worth gaining biodiversity in an ecosystem because it leads to many consequences and unpredictable effects on ecosystem.
So we can conclude that use of bioagent is a good way to eliminate invasive species from an ecosystem.
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Yes, it is a good way to eliminate invasive species from an ecosystem. This is because invasive species play a critical role in the limitation of biodiversity of a particular ecosystem.
What is Biodiversity?Biodiversity may be defined as the sum total of all the variety of living organisms in a particular ecosystem.
No, the risks of the gene drive getting into another species are not worth gaining biodiversity in an ecosystem. This is because it directs considerable influences and unanticipated impacts on the ecosystem.
Therefore, it is well described above.
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