A researcher conducts a study to determine the effectiveness of a chemical at removing paint from a house’s siding. The researcher’s study shows that the chemical removes around 80 percent of the paint on the test samples. The researcher publishes her results. Several other scientists read about the experiment and repeat it in their own laboratories.
Why should the scientists repeat an experiment that has already been done?
A. The scientists are trying to claim the discovery as their own.
B. Scientists repeat experiments in order to prevent bias.
C. The scientists repeat the experiment because they think the researcher is lying.
D. Scientists repeat experiments in their spare time when they are bored.
Chains of amino acids make___ which can join together to make a ____
Amino acids form chains called peptides, which can join together to form polypeptides. When many amino acids are linked, or when multiple polypeptides combine, they form proteins. The characteristics of a protein are determined by the sequence and arrangement of amino acids in the chain.
Explanation:Chains of amino acids form short chains called peptides. These peptides can join together to form longer chains, which are referred to as polypeptides. When the number of amino acids joined together becomes very large, or when multiple polypeptides are used as building subunits, the resulting macromolecules are known as proteins.
Each amino acid is attached to another amino acid by a covalent bond, known as a peptide bond, which is formed by dehydration synthesis. Dehydration synthesis in this context involves the carboxyl group of one amino acid combining with the amino group of another releasing a water molecule, hence the term dehydration. The process can continue, linking numerous amino acids together in a chain.
The sequence, number, and specifically the arrangement of these amino acids in the chain ultimately determines the protein's unique shape, size, and function.
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The human body is an organism made up of cells, tissues, organs, and organ system. Here are examples of three types of muscle tissue that are made of very different cells. How can scientists determine what type of cells make up each of these three tissues?
A) By using a magnifying glass to observe each tissue.
B) By collecting the tissues of people who have died and making observations.
C) By dissecting the tissues and then making observations using a dissecting scope.
D) By placing samples of each tissue on a slide and viewing the slides using a microscope.
in which US state would you visit to meet Hyperion, the very tallest Redwood?
During science class, students were instructed to develop a dichotomous key (a tool that allows the user to determine the identity of items in the natural world) in order to classify organisms into one of the six kingdoms of life. Ms. King, their teacher, provided them with this diagram. According to the diagram, the BEST way to separate all living things into two main groups would be to consider A) method of reproduction. B) consumer versus producer. C) cell type, prokaryotic versus eukaryotic. D) organization, unicellular versus multicellular.
What are two major events that happened in the Mesozic Era
Which of the following vertebrates had the chance to become abundant after the dinosaurs became extinct?
A. woolly moths
B. amphibians
C. mammals
D. reptiles
Please help!
5. Based on your reading, what makes it so that you are able to literally walk on the ocean floor in the Bay of Fundy?
4. Which aquatic ecosystem typically forms along coastlines where fresh water and salt water meet, leading to varying degrees of salinity?
how are humans activities disturbing carbon dioxide levels are affecting marine life
Answer:
The answer is "Increased carbon Dioxide levels have made the oceans more alkaline.
Explanation:
Google states "In the natural environment carbonate alkalinity tends to make up most of the total alkalinity due to the common occurrence and dissolution of carbonate rocks and presence of carbon dioxide in the atmosphere."
can a graph be used to represent the results of an investigation.
This is what an oak tree does at the theater when the movie ends
If a cell is placed in salt water water leaves the cell by
When a cell is placed in saltwater, water leaves the cell through osmosis because of the higher solute concentration in the saltwater solution.
Explanation:In a saltwater solution, a cell will lose water through a process called osmosis. Osmosis is the movement of water molecules from an area of lower solute concentration (inside the cell) to an area of higher solute concentration (in the saltwater solution). Since saltwater has a higher solute concentration than the cell, water will move out of the cell to achieve equilibrium.
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Any piece of data that can be used to support an assertion is
A)evidence.
B)a hypothesis.
C)a conclusion.
D)an observation.
What is
apenisinhermouth
fill in the name of the processes such as freezing that are represented
These are names of processes linked to the changes in physical states and properties of matter. They include an isentropic process with no change in entropy, irreversible processes which cannot return the system or surroundings to an initial state, isothermal processes that operate at constant temperatures, isobaric and isochoric processes that maintain constant pressure and volume respectively.
Explanation:The name of the processes such as freezing can be related to the ones annotated in the representation below.
Isentropic: This is a process that proceeds without any change in entropy. It's an ideal process that assumes perfect insulation, hence no exchange of heat with the surroundings.Irreversibility or Irreversible Process: These are processes that cannot return the system or the surroundings to its initial state. Heat transfer, free expansion, mixing of gases, and chemical reactions are examples.Isothermal Expansion or Isothermal Process: These are transformations that take place at a constant temperature. Gas expansion with heat addition is an example.Isobaric process: This is a thermodynamic process whereby the pressure remains constant.Isochoric process: A process during which the volume remains constant.Learn more about Thermodynamic processes here:https://brainly.com/question/31237212
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Help plz
1. The graph below depicts the frequency of expression of the coloration of beetles on an island:
Graph is the 1st Pic
Birds are the main predators of these beetles; they hunt the beetles by sight and pick them up off of the tree bark where they feed. A logging company clears the trees off of the island and plants younger trees as a replacement. Trees with light bark are planted on one side of the island and trees with dark bark are planted on the other side of the island. What do you predict would happen to the range of coloration in the populations of beetles on each side of the island? Select TWO answers, one to represent the beetles living on the light colored trees and one to represent the beetles living on the dark colored trees. (2 points)
A. graph 2 below
B. graph 3 below
C. graph 4 below
D. graph 5 below
Graph 3 represent the beetles living on the light colored trees and graph 5 represent the beetles living on the dark colored trees.
Options B and D are correct
How do we explain?These beetles are likely to experience selective pressure favoring lighter coloration because lighter-colored beetles would be better camouflaged against the light bark, making them less visible to birds. Over time, natural selection may lead to an increase in the frequency of lighter-colored beetles in this population.
In the same way, beetles on the dark-colored trees may experience selective pressure favoring darker coloration. Darker-colored beetles would be better camouflaged against the dark bark, providing them with a better chance of avoiding bird predation. Over time, natural selection may lead to an increase in the frequency of darker-colored beetles in this population.
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Fluorine has an atomic number of 9. The n = 1 energy level has two electrons, and the n = 2 energy level has seven electrons. Flourine's valence is _____.
when something accelerates then stops accelerating , what happens to the object?
which statement best describes the presidents role in the federal legislative process?
A- THE PRESIDENT MUST APPROVE BILLS BEFORE CONGRESS CAN VOTE ON THEM
B-THE PRESIDENT DETERMINES WHETHER TO SIGN OR VETO BILLS PASSED BY CONGRESS
C-THE PRESIDENT CAN ORDER A FILIBUSTER OF BILLS TO PREVENT A VOTE BY CONGRESS
D-THE PRESIDENT SETS THE RULES FOR FLOOR DEBATES ON BILLS PRESENTED TO CONGRESS
B-The president determines whether to sign or veto bills passed by congress.
Explanation;The president's only role in the federal legislative process is to sign or veto the bills that are passed by the Congress.When the president signs a bill that has been passed by the congress it becomes a Law. On the other hand, if the presidents vetoes the bill then it goes back to the congress. The congress has power to override the veto by the president with a two-third votes by the two houses.However, the override by the congress are not common, and usually the presidential vetoes kills bills.Answer:
The answer is B.
Explanation:
How does asexual reproduction occur to budding
how do astronomers use the celestial sphere to plot a stars exact position
which of the following is only found in plant cells?
A nucleus
B DNA
C ribosomes
D chloroplasts
One active transport process that occurs in the electron transport process in the membrane of the _____________ is the transport of protons to produce a proton gradient to power the production of ATP.
A) chloroplast
B) mitochondria
C) nucleus
D) ribosome
why do whales,giraffes, and humans all have seven vertebrae in their necks
Small pea seeds move around each other but do not bounce off. What state of matter is this?
The answer is C or liquid because liquid particles do not bonce off each other and liquids are Particles are loosely together Indefinite shape and definite volume Able to flow and Dan said "Small pea seeds move around each other but do not bounce off" so he is referring those small pees as molecules and he did say the pee seeds move around each other and bounce off and please correct me if am wrong and not to throw you under the bus lori0 but mullins is a town in south carolina
also can i have branlyest i never had it before
Answer:
liquid
Explanation:
A student swings his keychain around in a circle. What is the source of the centripetal force for this action?
Answer:
The correct answer will be- tension
Explanation:
Centripetal force is the force acting on the object moving in a circular path with direction towards the center. The centripetal force causes the object to follow a curved path.
Three forces together act on the string with key: Tension (a force acting on the key chain due to string), gravity (the downward force), and friction (resisting force). Out of these the main source of action of centripetal force is the "tension" applied by the string on the key-chain.
Thus, tension is the answer.
What's the difference between primary succession and secondary succession
Final answer:
The difference between primary and secondary succession is that primary succession occurs on newly formed land with no soil, requiring pioneer species to create soil, while secondary succession occurs on disturbed land with existing soil, allowing for faster recovery.
Explanation:
Ecological succession is the process where a community experiences a sequence of changes with the appearance and disappearance of species over time. The main difference between primary succession and secondary succession lies in the condition of the environment where the succession begins.
Primary succession occurs in areas where no soil exists because it's a newly formed or exposed environment, such as land formed from lava flow or locations where glaciers have retreated. Here, the environment is colonized by pioneer species which can grow in such harsh conditions and gradually create soil by breaking down rock and contributing organic matter as they die off.
In contrast, secondary succession happens in areas that were once home to existing life but were disturbed by events like wildfires or human activities. In these cases, soil is already present, and remnants of the destroyed community provide a basis for new growth. Succession in these situations tends to be faster than primary succession because the soil already contains nutrients needed for plant growth.
Which discovery did scientists make when they arranged elements in order of increasing atomic mass?
A.
a repeating pattern of properties
B.
a puzzling series of numbers
C.
alphabetical arrangement of the names of elements
D.
a complex code of patterns and relationships
pls help with this question