Atoms are neutral in charge because the number of protons (positive) equals the number of electrons (negative), balancing each other out. However, the neutrality can change if an atom gains or loses electrons, turning into an ion.
Explanation:Atoms are neutral in charge. Each atom consists of protons, neutrons, and electrons. Protons carry a positive charge and electrons carry a negative charge, while neutrons are neutral and have no charge. An atom is neutral because the number of protons (positive charges) is equal to the number of electrons (negative charges), balancing each other out. The neutrality of an atom can change, if it gains or loses electrons, becoming an ion. But overall, an isolated atom is neutral in charge.
Learn more about Atomic Charge here:https://brainly.com/question/1152162
#SPJ2
Which describes the correct pairing of DNA bases?
O
A. C with G, and A with T
O
B. C with C, and G with G
O
c. C with A, and G with T
O
D. C with T, and G with A
SNE
Answer:
A
Explanation:
The base C always pairs with G, and A pairs with T or sometimes U,
C - G
A - T
The correct pairing of DNA bases, based on Chargaff's rules, is C with G, and A with T. This is due to the structure of these molecules and the number of hydrogen bonds they can form.
Explanation:In the universe of biology, the DNA bases are paired in a standard and specific manner which is essential to the proper functioning of DNA replication and the transcription of genes. These pairing rules are defined by scientist Erwin Chargaff's rule, also known as Chargaff's rules.
According to these rules, Cytosine (C) always pairs with Guanine (G), and Adenine (A) pairs with Thymine (T). Hence, the correct option among those provided would be A. C with G, and A with T.
This specific pairing is due to the structure of the molecules and the number of hydrogen bonds they can form: C and G form three hydrogen bonds between them whereas A and T form two hydrogen bonds. Any other pairing won't hold the DNA strands together sufficiently.
Learn more about DNA Bases Pairing here:https://brainly.com/question/29824965
#SPJ12
which scientific investigation does not include dependent and independent variable?
1.observing and counting bird populations
2.studying the effect of temperature on bacterial reproduction rates
3.investigating the effect of mass on the speed at which an object falls
4.testing a model car's air flow resistance at different wind speeds in a wind tunnel
The scientific investigation without dependent and independent variables is observing and counting bird populations, which is an observational study and not a controlled experiment.
Explanation:The scientific investigation that does not include dependent and independent variables is observing and counting bird populations, which is an example of an observational study. In this type of investigation, researchers are simply making observations without manipulating any factor. Therefore, there isn't an independent variable being altered to see its effect on a dependent variable. However, in the other three options provided, there is a clear manipulation of one variable (the independent variable) to see its effect on another variable (the dependent variable), which classifies them as controlled experiments.
For example, in studying the effect of temperature on bacterial reproduction rates, temperature is the independent variable, and the bacterial reproduction rate is the dependent variable. Likewise, when investigating the effect of mass on the speed at which an object falls, mass is the independent variable, and the falling speed is the dependent variable. In testing a model car's air flow resistance at different wind speeds in a wind tunnel, wind speed is the independent variable, and air flow resistance is the dependent variable.
Rutherford coined the term used for the simplest positive charged particle and called it the:
Answer:
Rutherford coined the term protons and is positively charged particle present inside the nucleus of the atom. It has its own mass and is slightly less than the mass of the neutron.
Explanation:
It is believed that the protons are made up of 2 up quarks and 1 down quark. It helps to bind the nucleus together. It attracts negatively charged particle called as electron towards itself. Electrons are arranged in the orbit of the atom.
1. One of the products of cellular respiration is a reac
in photosynthesis. This product is
A. ATP.
B. carbon dioxide.
C. oxygen.
D. water.
Answer:
B. carbon dioxide.
Explanation:
In cellular respiration, the products are carbon dioxide (CO2), water (H2O), and energy in the form of adenosine triphosphate (ATP).
In photosynthesis, carbon dioxide (CO2) is used along with water (H2O) and light energy to produce glucose (C6H12O6) and oxygen (O2).
So, if the question is about a product of cellular respiration that is also involved in photosynthesis, the correct answer would be:
B. carbon dioxide.
It plays a role in both processes, being a product of cellular respiration and a reactant in photosynthesis.
Describe the way magmas are produced in subduction zones. (Help!!!!)
what would happen if the electron transport system in the light-dependent reaction of photosynthesis was disabled for some reason?
Answer: The short answer is they would have lost thir glucose.
Explanation: It is the one thing that produces glucose
Answer:
The electron transport system takes place within the cristae of the mitochondria, where the cytochromes (enzymes) and coenzymes exist. It is a series of proteins that move electrons through a membrane within mitochondria to produce a gradient of protons that activates the production of adenosine triphosphate (ATP).
The electron transport system
in the light dependent reaction of photosynthesis plays a crucial role in the creation of electrons that are employed as precursor for NADPH production.
If it was diabled, there would be no flow of electrons from PSII to PSI. Ferredoxin would be dormant since there is no electrons to pass to NADP+ which in turn will lead to no production of NADPH.
The NADPH and the respective molecules that are made in the course of the light dependent reaction are employed in the course of the dark reaction to form sugar molecules.
So, if the electron transport system in the light-dependent reaction of photosynthes is disabled, glucose molecule will not be formed in the course of the dark reaction.
summarize the relationship between water, carbon dioxide, carbonic acid, bicarbonate and hydrogen
Answer:
Explanation:
Water reacts with Carbon dioxide to form Carbonic acid, please see equation below:
H2O (water) + CO2 (carbon dioxide) ⇄ H2CO3 (carbonic acid)
Carbonic acid is a weak acid and some of it dissociates to Hydrogen ions and Hydrocarbonate ions, please see equation below:
H2CO3 (carbonic acid) ⇄ H+ (hydrogen ions) + HCO3-
Carbon dioxide dissolves in water to form carbonic acid, which then ionizes to bicarbonate and hydrogen ions in a dynamic chemical equilibrium. This series of reactions plays an essential role in regulating CO₂ and pH levels in the human body and in the carbon cycle in nature.
Explanation:The relationship between water, carbon dioxide, carbonic acid, bicarbonate, and hydrogen is all linked by a series of chemical reactions. First, carbon dioxide (CO₂) from the atmosphere dissolves in water. This dissolved carbon dioxide then combines with water molecules to form carbonic acid (H₂CO3). The carbonic acid then ionizes in water to form bicarbonate (HCO3-) and hydrogen ions (H+). This process is reversible and forms a dynamic chemical equilibrium in water systems. For example, in the human body, these reactions are actively involved in the transport and regulation of CO₂ and pH levels in the blood.
Moreover, this process also occurs in nature, more than 90 percent of the carbon in the ocean is found as bicarbonate ions. These bicarbonate ions combine with seawater calcium to form calcium carbonate (CaCO3), which contributes significantly to marine organism shells and eventually forms part of the largest carbon reservoir on Earth, limestone.
Learn more about Carbon Cycle here:https://brainly.com/question/30508567
#SPJ3
Freshwater protozoans must be able to maintain homeostasis within their environment. One of the problems they face is water diffusing into their cells from the environment. How do they address this issue?
A) Freshwater protozoans respond to the hypotonic environment by removing water through a pseudopod.
B) Freshwater protozoans respond to the hypertonic environment by removing water through a pseudopod.
C) Freshwater protozoans respond to the hypertonic environment by removing water through a contractile vacuole.
D) Freshwater protozoans respond to the hypotonic environment by removing water through a contractile vacuole.
Answer:
The correct option is D. Freshwater protozoans respond to the hypotonic environment by removing water through a contractile vacuole.
Explanation:
A hypotonic environment can be described as a condition in which the concentration of water is more outside the cell than the inside of a cell. In such a condition, water tends to enter the cell through osmosis. This can cause the cell to be filled excessively with water and burst.
To avoid such circumstances, the freshwater protozoans contain contractile vacuoles. The contractile vacuoles remove excess water from the cell.
answer: is d
Explanation:
what is density and what does it tell you about a substance
Answer:
Density is the characteristic property of the substance. Density is related to mass and volume of the substance.
Explanation:
Density of the substance decides whether it will float or submerge in water or any other liquid. If the substance is denser than the liquid then it will sink and if its density is lower than the liquid then it will float.
Density is written in kilogram per cubic meter. For instance, the density of oil is lesser than water and hence, it floats.
How do you know if the cell will shrink or swell?
In a hypertonic environment, a cell will shrink due to water loss. In a hypotonic environment, a cell will swell due to water gain. In an isotonic environment, the cell will maintain its size as there is no net water movement.
Explanation:Whether a cell will shrink or swell depends on the type of environment it is in. When it is placed in a hypertonic environment, which has a higher concentration of solutes, the water will leave the cell to maintain equilibrium, and the cell will shrink. This process is known as crenation.
However, if the cell is in a hypotonic environment where the concentration of solutes is low, water will move into the cell to balance out the solute concentration, causing the cell to swell. If the intake of water goes to excess, the cell may burst, a process known as lysis, due to the excessive influx of water.
Finally, in an isotonic environment, where the concentrations of solutes inside and outside the cell are the same, there is no net water movement, so the cell will neither swell nor shrink.
Learn more about Tonicity here:https://brainly.com/question/30970864
#SPJ3
What has left tons of "space junk" in orbit around the earth? "Pick One"
A) robots sent on space missions
B) years of space exploration
C) lack of recycling
D) missiles in outer space
Answer:
B
Explanation:
Why types of organism were hypothesized to be inhabiting earth prior to the rise of oxygen
Answer:
The organism Cyanobacteria was the first organism to inhabit t he Earth prior to the rise oxygen in the atmosphere.
Explanation:
The single-celled Cyanobacteria were known to be the first oxygen-producing organisms even before the rise of oxygen in the atmosphere or the "Great Oxidation Event," way back 3.5 million years ago. They were able to survive the harsh conditions of the Earth by photosynthesis. During this process, the Cyanobacteria would use sunlight, water and organic carbon dioxide to produce sugar for their energy. As a waste product, oxygen was released to the atmosphere. Accumulation of the oxygen in the atmosphere was increased by the presence of the volcanic gases like hydrogen, reacting with the oxygen. This caused a reduction reaction and made a more viable oxygen-rich atmosphere.
Josey wants to look at the cells of an onion under a light microscope. She peels off a thin, transparent layer of onion and places it on a microscope slide. Josey places the sample on the microscope stage, looks through the eyepiece, and adjusts the stage to focus the image. However, she is unable to see any details of the cells.
Which of the following possible solutions could possibly help Josey to see the onion cells in detail?
A. Josey should use a thicker piece of onion for her sample.
B. Josey should place her onion sample in a vacuum.
C. Josey should place a drop of water on her sample.
D. Josey should apply a stain, such as iodine, to her sample.
Answer:
D
Explanation:
Staining allows for visualization of cells and its organelles under a microscope because cells in their natural form are either transparent or translucent. There are different staining techniques depending on the type of microscope being used, the type of cell being visualized, identification of cells, and etcetera. In this case iodine is used because it is well taken by starch molecule in the onion cells hence increasing visualization of the cell.
The possible solution that Josey can employ that will make her see the details of the onion cell under a microscope is: D. Josey can apply a stain to her sample, such as iodine.
Most cells and cell structures appear translucent if you try viewing them with a microscope in their natural form. They are not transparent.
To make these cells and their organelles transparent when viewing under a microscope, different staining techniques are usually employed, depending on the type of cells and the microscope being used.
Onion cells can be made transparent under a microscope if it is stained with iodine.
Therefore, the possible solution that Josey can employ that will make her see the details of the onion cell under a microscope is: D. Josey can apply a stain to her sample, such as iodine.
Learn more here:
https://brainly.com/question/12264574
Which of the following processes make a sweat when I exercise
Digestion
Homeostasis
Reproduction
respiration
Answer:
Homeostasis
Explanation:
Homeostasis is an organism ability to maintain equilibrium [which means balancing opposing forces]. When we sweat our body it is trying to stop overheating.
Answer:
homeostasis would most likely be the answer. homeostasis is an organisms ability to maintain equilibrium (which means when opposing forces are balanced). When a human sweats, the body is trying to keep from overheating. this means the body is keeping itself at one temperature. Hope this helped
Explanation:
brainliest please-
How has blood transfusions been tested on animals??
Answer:
Explanation:
Key developments in blood transfusion techniques
• Animal experiments over the years 1900-1916 gradually enabled transfusion to become the routine technique it is today. The key developments were:
• George Crile (1907) perfected the technique of transfusion from artery to vein using dogs, and described its application in 32 patients.
• Hustin (1914) showed that addition of sodium citrate could prevent blood from clotting and that citrated blood could be safely transfused into dogs.
• Richard Lewisohn (1915) determined the maximum amount of citrate that could be transfused into dogs without toxicity and thus determined the optimum concentration that could be added to blood for the best anticoagulant effect.
• Weil (1915) showed that citrated blood could be stored for 2 days and still be effective when transfused into guinea-pigs and dogs which had lost blood.
• Rous and Turner (1916) used rabbits to demonstrate that, with certain additives and proper treatment, citrated blood could be stored for 14 days and still be successfully transfused.
Through these animal experiments, the prolonged storage of blood without clotting thus became possible, so enabling the establishment of blood banks, and blood transfusion as a routine procedure.
Explain how the alleles were passed from
parents to offspring.
Answer:
Explanation:
The offspring received one allele from each parent. The alleles were separated during gamete formation before they were passed to the offspring. Green pod color is dominant, resulting in the offspring having the green pod color.
Answer:
The offspring received one allele from each parent. The alleles were separated during gamete formation before they were passed to the offspring. Green pod color is dominant, resulting in the offspring having the green pod color.
Explanation:
This was the sample answer on e2020
identify a similarity between carbohydrates and lipids
Answer:
Carbohydrates and lipids are both macronutrients and provide several key functions to the human body.
Explanation:
These nutrients have similar chemical structures and the body uses carbohydrates and lipids in similar ways. Carbohydrates are molecules composed of carbon, hydrogen and oxygen, with a ratio of one atom of carbon and two atoms of hydrogen for every atom of oxygen. Lipids have the same elements as carbohydrates, but differ in their linkage.
The diagram below shows a newspaper headline.
Authorities believe they know
how prisoners escaped
What is this headline an example of?
a. a hypothesis
b. an observation
ca prediction
d. a fact
PLZ HELP ME I NEED THIS TONIGHT!!! Which of the following describes soil and temperature in an ecosystem?
A.unnecessary factors
B.abiotic factors
C.biotic factors
D.selection factors
Answer:
[tex]B.[/tex] [tex]Abiotic[/tex] [tex]Factors[/tex]
Explanation:
Abiotic factor: Nonliving chemical and physical parts, just like temperature and soil in an ecosystem
As far as the ecosystem is concerned, soil and temperature are abiotic factors.
The biotic factors of the ecosystems are living factors. They consist of all the living organisms and their relationship with each other in the ecosystem.
The abiotic factors are also known as nonliving factors. They include soil, temperature, pressure, salinity, wind, etc.
Thus, temperature and soil are parts of the nonliving factors of the environment.
More on environmental factors can be found here: https://brainly.com/question/6810544?referrer=searchResults
how do you think living systems, such as sea stars, carry out life functions and respond to changes in their environment
Answer:
Sea stars carry out life functions in diverse -and unique- ways (read below) and are able to respond to environmental changes through adaptations such as temperature regulation.
Explanation:
Sea stars are invertebrate organisms that belong to the Phylum Echinodermata and are adapted to life in the ocean. They carry out life functions in diverse kind of ways. Here are some examples:
Limb regeneration: they are known for the impressive ability to regenerate their limbs, which they accomplish because almost all of their vital organs are located in the arms.Feeding: sea stars are generally carnivorous creatures. They use their suction-cupped feet to open clams, mussels, and oysters. On the other hand, there are some species that prefer to feed on detritus or organic matter.Locomotion: these organisms are able to move thanks to their water vascular system, as they do not possess a circulatory system. Water circulates throughout their body into their feet, allowing it to extend and move.Response to environmental changes:
According to new research evidence, these marine creatures possess unique adaptations that are extremely helpful in regard to environmental changes. They are able to regulate their own temperature during changing tides. During high tides, sea stars absorb cold water that is later used when temperatures are too hot due to warm water and sunlight. This adaptation is crucial to respond to environmental changes such as climate change.
At the end of meiosis, there are ____ haploid gametes.
three
four
five
Hey!
---------------------------------------------------------------
Answer:
Four
---------------------------------------------------------------
Explanation:
In egg cells, 1 haploid gamete is produced. In sperm cells, 4 haploid gametes are produced. Meiosis is the process of duplicating chromosomes to create egg and sperm cells.---------------------------------------------------------------
Hope This Helped! Good Luck!
Answer:
There are four haploid daughter cells.
Explanation:
2. Factors that may affect variables are called
a. experiments.
b. hypotheses.
C. theories.
d. variables.
The factors that may affect variables are called theories. The correct option is C.
What are variables?A variable is defined as any property, number, or number of items that can be counted or measured. A variable is also known as a data item.
Dependent variables are so designated in spite of the thought that their values are to be investigated in a laboratory activity.
This can be done under the presumption or requirement that they are dependent on the value of other variables due to some law or rule.
A dependent variable is one that changes as a result of the independent variable's manipulation.
It is the desired outcome, and it is dependent on your independent variable. In statistics, dependent variables are often referred to as output responses.
Thus, the correct option is C.
For more details regarding variables, visit:
https://brainly.com/question/17344045
#SPJ2
Where in the cell is the glucose produced? in mitochondria in chloroplasts in cytoplasm in water
Answer:
In chloroplasts
Explanation:
It is produces in the chloroplasts of the cell. Glucose is a simple sugar and photosynthesis produces the glucose and then glucose is transported into the cells. Chloroplasts are making sugar during the process of converting light energy into chemical energy and those are stored in glucose.
Chloroplasts are the food producers and we can find them in plant cells and eukaryotic algae.
A measurement is considered ___________ if it actually measures what it is intended to measure, according to the topic of the study.
Answer:
valid
Explanation:
A measurement is considered valid if it actually measures what it is intended to measure, according to the topic of the study.
Validity can be described as accuracy of something. Validity is measuring something which we are actually supposed to measure, whereas reliability shows how consistent or convenient are the results. Validity states how much accuracy is present in a statement, concept or measurement. The term 'valid' is known to be derived from a Latin word "validus" which means to be strong.
Which was Ventor’s contribution to science? discovered the existence of single-celled organisms invented the light microscope discovered the structure of DNA invented a synthetic cell
Answer:Venter's contribution to science was the invention of a synthetic cell. The correct option is D. Craig Venter created a synthetic cell which is totally controlled by man-made genetic instructions.
Explanation:Just because
Answer:
The correct answer is invented a synthetic cell.
Explanation:
Ventor contributed significantly to humanity and science by discovering a synthetic cell. He did this by developing the genome of a bacterium and by inserting it into a cell. The cell was created by combining together the genome of a pathogen from small DNA stretches, which are produced in the laboratory.
The produced genome was then administered into a vacant cytoplasm of the associated bacterium. The pathogen utilized is known as Mycoplasma mycoides, it generally infests goats. The cell is the initial synthetic form of life in the world and has opened the gate for various kinds of researches.
2 Points
What is the name for different forms of a gene?
Answer:
diploid organisms
Explanation:
An allele is a variant form of a gene. Some genes have a variety of different forms, which are located at the same position, or genetic locus, on a chromosome. Humans are called diploid organisms because they have two alleles at each genetic locus, with one allele inherited from each parent.
3. a) A plant can have either tall (7) stems or short (t) stems. Two plants are crossed. One has the
genotype Tt and the other has the genotype Tt. Fill in the Punnett square below for this cross. (1
point)
The punnett square would look like this
The punnett square is a resource that was conceived by RC Punnett, a collaborative geneticist for William Batenson (both lived between the end of the 19th century and the beginning of the 20th century, actively participating in the rediscovery of Mendel's work), which greatly facilitates the making of crosses between F-1 heterozygotes, by filling in the boxes that compose it with the genotypes resulting from the crossing performed.
The Punnet square of two organisms where one has the Tt genotype and the other the Tt genotype is shown in the image below:
How can you identify is air is matter?
Answer:
Matter is anything that has mass and takes up space. Air is all around us, that is what we breath- oxygen-
Explanation:
It's easier to prove that air takes up space. As you blow into the balloon it will expand and that is a way to prove air is matter.
What cell parts are common to all of these cells?
Use complete sentences.
.
The cell parts common to all cells are:
Cell ,membrane, Cytoplasm ,Ribosomes, DNA .
Plasma Membrane: Every cell is enclosed by a plasma membrane, a lipid bilayer that separates the cell's interior from the external environment.
It regulates the passage of substances in and out of the cell.
Cytoplasm: The cytoplasm is the semi-fluid substance inside the cell where various organelles are suspended.
It contains water, ions, and molecules necessary for cellular processes.
DNA: Genetic material, in the form of DNA (deoxyribonucleic acid), carries the cell's hereditary information and instructions for cellular functions. It's present in all cells.
Ribosomes: Ribosomes are responsible for protein synthesis. They can be found in both prokaryotic and eukaryotic cells.
They read the genetic code and assemble proteins.
While these components are universal, eukaryotic cells have additional structures such as a nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, and more, which are not present in prokaryotic cells like bacteria and archaea.
These differences highlight the distinction between prokaryotic and eukaryotic cells, but the common components mentioned above form the foundation for all cellular life on Earth.
For such a more question on Cytoplasm https://brainly.com/question/174023
#SPJ3
Question
What cell parts are common to all of these cells?
Winds, known as trade winds, blow from east to west across the Pacific Ocean. These winds move water at the surface along the California coast Nutrients that would normally stay at the bottom of the ocean rise to the surface as well.
Which of the following conclusions is supported by the information above?
A) Trade winds help sustain some food chains.
B) Trade winds produce minerals in some oceans.
C) Trade winds can reverse parts of the water cycle.
D) Trade winds may be able to reduce global warming.
Answer:
A
Explanation:
The deep cooler currents in the oceans have more nutrients because of several factors;
They are cold and dense hence can hold much oxygenThe ‘scrap’ along the ocean floor hence carry with them dissolved mineral elements from the rocky bottom.The dead organisms that sink to the bottom of the oceans are carried by these currents.When the trade winds push the warm waters towards the east, the cooler water from the bottom upwell (from the west in a cyclic fashion) to replace the displaced water by the winds. They bring with them nutrients and oxygen that is great ‘fodder’ for plankton. The plants are then fed on by smaller fish like shrimps. The smaller fish are then preyed on by bigger fish hence sustaining food chains/webs.