Answers
In order to eliminate the error in the setup of the groups for the investigation, the company should test a fourth group known as the control group, in which participants do not receive the mineral supplement; option A.
What is a control group in an investigation?A control group is a group that receives the same care as an experimental group, with the exception that it is not subjected to the therapy or intervention under study.
A control group is used to create a standard against which the experimental group can be measured.
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Related Questions
Scientists will often make observations and create ______ to explain those observations and predict future trends.
Laws
Data
Models
Problems
You are sent to Brazil to work on a biosphere project. What is this project most likely to be?
alculating the age of a rock formation
Measuring the amount of pollution in the rivers
Studying the behavior of crocodiles next to a newly built dam
Forecasting the weather
Answers
Answer:
For the first question you asked its models and the second is the crocodile one
Explanation:
I took the quiz
In the Gulf of Mexico, there is a large area off the coast of Louisiana that cannot support most marine life. In this area, freshwater from the Mississippi River carries excess phosphorus and nitrogen from lawn care and agriculture into the Gulf of Mexico. Algae in the water use these nutrients to grow rapidly, creating algal blooms in the water. When the algae die, they sink to the bottom of the Gulf, where bacteria use much of the oxygen in the water to decompose the algae. Dissolved Oxygen Levels in Gulf of Mexico Dead Zone Marine organisms trying to live in the water may not get enough oxygen to survive. Based on this description, which of the following is true?
Answers
Based on the given description and the process depicted above is of eutrophication.Therefore, the correct option is A.
What is eutrophication?Eutrophication is the process by which excessive nutrients, such as phosphorus and nitrogen, enter a body of water, leading to an overgrowth of algae and other aquatic plants.
When these plants die and decompose, they consume much of the oxygen in the water, leading to low oxygen levels that can be harmful to aquatic life.Therefore, the correct option is A.
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The question is incomplete, but most probably the complete question is,
In the Gulf of Mexico, there is a large area off the coast of Louisiana that cannot support most marine life. In this area, freshwater from the Mississippi River carries excess phosphorus and nitrogen from lawn care and agriculture into the Gulf of Mexico. Algae in the water use these nutrients to grow rapidly, creating algal blooms in the water. When the algae die, they sink to the bottom of the Gulf, where bacteria use much of the oxygen in the water to decompose the algae. Dissolved Oxygen Levels in Gulf of Mexico Dead Zone Marine organisms trying to live in the water may not get enough oxygen to survive. Based on this description, which of the following is true?
A. The process depicted above is of eutrophication.
B. The process depicted above is of photosynthesis.
C. The process depicted above is of spermatogenesis.
D. The process depicted above is of pollination.
What’s the correct answer answer asap for brainlist
Answers
A. Brackish Water.
Marty uses a customized database to sort parts and track inventory. The customized database is an example of _____.
hardware
software
Answers
Answer
software
Explanation:
Liquid plastic is frozen in a physical change that increases its volume. What can be known about the plastic after the change?
Answers
please mark me brain mark list
Answer:
it mass will increase
Explanation:
I Did the quiz
1. Marco's little brother is watching a TV program about the gene that causes the genetic disease hemophilia. People with this disease cannot make a protein that is needed for blood to clot. After a few minutes, he turns to Marco and asks, "what exactly is a gene, anyway?"
Which of the following BEST describes a gene?
A. A gene is a random change to an organism's DNA.
B. A gene is a structure in a cell that contains the cell's chromosomes.
C. A gene is made of DNA and contains the instructions for building proteins.
D. A gene is a protein that makes up an organism's structure and helps it function.
Answers
A gene can be described as being made up of DNA and it contains the instructions which are required for the building of the proteins.
The correct option is option C.
Genes are basically considered as the the functional units of heredity as they are basically composed of DNA, which is the nucleic acid responsible of the transmission of information from one generation to the other generation.
The chromosomes which are present in our body are basically made up of DNA which contain a number of genes. Each of the gene basically comprises of certain set of instructions which are required in order to perform a particular function or codes for some proteins.
Hence, the correct option is option C.
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Now choose one of the resources used for energy production that you have studied in this lesson. Describe how the way humans use or obtain this resource might impact the natural resource you described in part A. If you don’t think the natural resource in part A is affected, explain why.
Answers
Answer:
HERE
Explanation:
One resource used for energy production that can impact the natural resource of ozone layer depletion is coal. Burning coal releases pollutants like sulfur dioxide, nitrogen oxides, and mercury into the atmosphere, which can contribute to the formation of smog and acid rain. These pollutants can also react with other chemicals in the atmosphere to break down ozone molecules, contributing to the depletion of the ozone layer. So, the way humans use coal as an energy resource can have a negative impact on the ozone layer and the environment.
What kind of protective measure is it when a skunk uses body odor to protect itself from predators?
Answers
physical defense
chemical defense
camouflage
social defense
Producersare found on what levelof a food chain, if the sun is notincluded?A. FirstB. SecondC. Third
Answers
Producers are found at the first level of every food chain. They are considered as autotrophs that can undergo photosynthesis. This level is also called as trophic level 1. They are the primary producers occupied by pants and algae.
The second level of the food chain eat the producers. They are called as the primary consumers. the third level of the food chain are the secondary consumers. They
Answer:
First
Because if the sun is not included , the are still some producers that don't use the sun
What is the surface of the Earth called?
Crust
Mantel
Inner core
Outer core
Answers
Answer:
crust
Explanation:
You're outdoors and
you notice that your
skin feels a little "moist
& sticky." Which
instrument would give
you information based
on your experience?
Answers
A hygrometer would give you information based on your experience of feeling "moist & sticky" outdoors. A hygrometer is an instrument that measures the amount of moisture or humidity in the air, also know as relative humidity. The relative humidity is a measure of the amount of moisture in the air compared to the maximum amount the air could hold at a specific temperature. So if the air is hot and humid, it will make the skin feel "moist & sticky" and a hygrometer will indicate high relative humidity.
A hygrometer would provide you with information based on your experience of feeling "wet & sticky" outside.
what is hygrometer ?
A hygrometer is a device that measures the quantity of water vapour in the air, soil, or restricted places. Humidity metres often rely on measurements of other factors such as temperature, pressure, mass, or a mechanical or electrical change in a substance when moisture is absorbed. These measurable values can be used to calculate humidity using calibration and computation. To monitor humidity variations, modern electronic devices employ the temperature of condensation (called the dew point) or changes in electrical capacitance or resistance. Leonardo da Vinci constructed a primitive hygrometer in 1480. During the 1600s, major advances were made; Francesco Folli constructed a more practical version of the apparatus.
A hygrometer would provide you with information based on your experience of feeling "wet & sticky" outside. A hygrometer is a device that measures the quantity of moisture or humidity in the air, often known as relative humidity. The relative humidity is a measurement of the quantity of moisture in the air in comparison to the maximum amount the air may contain at a given temperature. If the air is hot and humid, the skin will feel "wet and sticky," and a hygrometer will show high relative humidity.
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In horses, the Overo gene, Ov, produces a white splotch pattern on the coat. The overo phenotype is seen only when a horse has one Ov copy, Ovov. Horses with two Ov copies, OvOv, die soon after birth and are called white overo because they are completely white. Horses with no Ov copies are solid colored, ovov. The Leopard complex gene, Lp, shows incomplete dominance and controls white spotting. One Lp allele, Lplp, produces the leopard phenotype, in which there are spots everywhere. Two Lp alleles, LpLp, produce the fewspot phenotype, in which the horse is mostly white with colored spots. A horse that is both overo and leopard is called pintaloosa, and these horses are spotted with splotches. A horse that is overo and fewspot is considered fewspot because the white areas from Lp is indistinguishable from the white from Ov. Horse with overo phenotype. Overo Horse with solid coloration. Solid Horse with leopard phenotype. Leopard Horse with pintaloosa phenotype. Pintaloosa Horse with fewspot phenotype. Fewspot Suppose that 16 pairs of pintaloosa horses have one offspring per pair. How many of each phenotype would be expected
Answers
The question is incomplete. Here is the complete question.
In horses, the Overo gene, Ov, produces a white splotch pattern on the coat. The overo phenotype is seen only when a horse has one Ov copy, Ovov. Horses with two Ov copies, OvOv, die soon after birth are called white overo because they are completely white. Horses with no Ov copies are solid colored, ovov.
The Leopard complex gene, Lp, shows incomplete dominance and controls white spotting. One Lp allele, Lplp, produces the leopard phenotype, in which there are spots everywhere. Two Lp alleles, LpLp, produce the fewspot phenotype, in which the horse is mostly white with colored spots.
A horse that is both overo and leopard is called pintaloosa, and these horses are spotted with splotches. A horse that is overo and fewspot is considered fewspot because the white areas from Lp is indistinguishable from the white from Ov.
Suppose that 16 pairs of pintaloosa horses have one offpring per pair. How many each phenotype would be expected? Determine the number out of 16 expected for each phenotype. Only count phenotypes of offspring expected to live past one week of age.
overo:
white overo:
fewspot:
Answer: Overo: 2
White overo: 0
Fewspot: 3
Explanation: Pintaloosa is a "combination" of overo and leopard, so the pair's genotype is OvovLplp.
To cross a pair, use Punnet Square and to facilitate, use the square for each characteristics:
Punnett Square For overo and white overo:
Ov ov
Ov OvOv Ovov
ov Ovov ovov
Analysing this Punnett square, notice that there are 2 individuals who will carry the genotype for overo (Ovov) phenotype. So, 2 out of the 16 pair will have an overo phenotype.
Since white overo is recessive (ovov) and doesn't survive past birth, there will be zero horses with that phenotype.
Punnett Square For leopard and fewspot:
Lp lp
Lp LpLp Lplp
lp Lplp lplp
From this square, notice that there are 1 individual who is fewspot. However, a horse that is overo and fewspot is considered fewspot, so for the 16 pair, 3 out 16 will be fewspot.
A crane has a sharp and pointed beak while the duck has a flat beak.Explain why
Answers
Answer:
The crane has a sharp and pointed beak adapted for catching and grasping prey. The sharp beak allows the crane to effectively stab and pierce its prey, such as fish, frogs, or small animals. The pointed shape helps the crane to accurately target its prey and secure a firm grip.
On the other hand, the duck has a flat beak, which is better suited for its specific feeding habits. Ducks are primarily filter feeders, and their flat beak enables them to sift through water or mud to collect small organisms, insects, and plants. The flat beak acts like a sieve, allowing the duck to strain out food particles while retaining water.
The difference in beak shape between the crane and the duck reflects their distinct feeding strategies and ecological roles. Each species has evolved its beak shape to optimize its ability to capture and consume the specific types of food sources available in their respective habitats.
Which of the following is NOT a consequence of increased atmospheric CO2 levels?
Answers
Answer:
whats the answers ??? it says the following so it has to be multiple choice
Explanation:
Les fossiles temoigent :
Answers
A student prepared four different red blood cell suspensions, as shown in the chart below. The change in red blood cell volume is principally due to the movement of...
a.salt
b.oxygen
c.starch
b.water
Answers
Answer:
The change in red blood cell movement is principally due to the movement of salt
The change in red blood cell volume is principally due to the movement of water.
What happens to red blood cells in water?The red blood cells can swell or shrink depending on the concentration of solutes (salt and other dissolved particles) and the concentration of water in the surrounding solution. When the concentration of solutes is higher inside the cell than outside, water will move out of the cell, causing it to shrink.
When the concentration of solutes is lower inside the cell than outside, water will move into the cell, causing it to swell. In the chart provided, the change in red blood cell volume is likely due to the movement of water in response to the different concentrations of solutes in the suspensions.
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3. Which helps the body maintain a stable temperature?
O heart rate and sweating
sweating and shivering
shivering and breathing
breathing and heart rate
Answers
Explanation:
sweating and shivering
Hope it helps you
why are mutations considered important in evolution
Answers
Mutations are considered important in evolution because they are the ultimate source of genetic diversity.
Mutations are alterations in the sequence of an organism's DNA, caused by radiation or toxins in the environment. They can also form spontaneously during DNA replication.Mutations can have a variety of impacts. These are frequently dangerous or have little or no impact. However, changes in DNA sequence can occasionally be helpful to the organism.Beneficial mutations that offer a survival benefit or reproductive success are more likely to be passed on to subsequent generations, increasing their frequency in the population over time. This accumulation of favorable mutations is a driving factor in the process of evolution.Without mutations, there would be no supply of new genetic information, and evolution would be greatly hampered.
Answer:
Mutations are one of the fundamental forces of evolution because they fuel the variability in populations and thus enable evolutionary change.
When a rock transforms into another type of rock, what is the scale at which these changes are occurring?
A. The changes are physical only; the rocks are the same rocks, they just look different
B. At the subatomic level; the rocks atoms are gaining and losing subatomic particles and changing.
C. At the molecular level; the rocks are forming new bonds and becoming something new
D. At the atomic level; the rocks are becoming new rocks and changing on an atomic level.
Answers
When a rock transforms into another type of rock, the scale at which these changes are occurring is at the atomic level, which is option D.
Rocks are composed of minerals, which are made up of different combinations of atoms. During the process of rock transformation, such as through the geological processes of metamorphism or igneous activity, the arrangement and composition of the atoms within the minerals change. This leads to the formation of new minerals and the alteration of the rock's properties.
At the atomic level, the atoms within the minerals may rearrange themselves, forming new bonds and crystal structures.
This can result in changes in the physical characteristics of the rock, such as its texture, color, or mineral composition.
The transformation may involve the loss or gain of atoms, leading to changes in the overall chemical composition of the rock.
Therefore, the changes occurring when a rock transforms into another type of rock primarily occur at the atomic level, as the atoms within the minerals undergo reorganization and bonding to create a new rock with distinct properties.
Therefore, the correct answer is D.
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A biochemical sample contains four different proteins (A, B, C, D) that need to be separated. Proteins A and B are glycoproteins with isoelectric points of 5.5 and 7.0 respectively. Proteins C and D are normal proteins with molecular weights of 30 and 50 kDa, respectively. Please design a chromatographic method for separating them.
Answers
The pH level at which a specific molecule has no net electrical charge is known as the isoelectric point (pI).
What is Isoelectric point?
The pH of the molecule's environment has an impact on its net charge, which can shift more positively or negatively depending on whether protons are added or taken away.
Protein Aggregation could happen if there is no net charge. It is crucial to remember that calculating a protein's pI solely based on its amino acid sequence is frequently inaccurate because protein folding, modification, and labeling can all affect the pI.
The proteome is bimodally divided into two groups of acidic and basic proteins. However, the amount of acidic and basic proteins varies between species and may be connected to taxonomy.
The pH level at which a specific molecule has no net electrical charge is known as the isoelectric point (pI).
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Describe the shape of the earths orbit around the sun
Answers
Earth's orbit is not a perfect circle. It is elliptical, or slightly oval-shaped. This means there is one point in the orbit where Earth is closest to the Sun, and another where Earth is farthest from the Sun.
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Which of the following is NOT a piece of evidence that supports the endosymbiotic theory?
Which of the following is NOT a piece of evidence that supports the endosymbiotic theory?
The chloroplast and mitochondria cannot exist outside of the eukaryotic cell that they inhabit
The chloroplast and mitochondria share similar features with bacteria, such as circular DNA and ribosomes.
The chloroplast and mitochondria divide through binary fission
The chloroplast and mitochondria have 2 membranes
Answers
All Options below indicate features that support the endosymbiotic theory (none of the Options is correct).
What is the endosymbiotic theory?The endosymbiotic theory is a scientific theory that states eukaryotic cells emerged by cooperation between a primitive cell and prokaryotic organisms which formed organelles such as mitochondria or chloroplasts.
In conclusion, all Options below indicate features that support the endosymbiotic theory (none of the Options is correct).
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What are the characteristic of rough pneumococci strain
Answers
Griffith injected mice with a few rough (noncapsulated and nonpathogenic) pneumococci and a large number of heat-killed smooth cells.
Explanation:
I hope it helps#carry on learning
Can someone please help me with this I’ll give u brain list !!
Answers
Answer:
Here u go ;)
Explanation:
Livestock :- animals that are kept for the goods they offer and that can be sold for profit
Overharvesting :- catching or removing from a population more organisms than the population can replace
Aquaculture :- involves raising aquatic organisms for human use
Drought :- lack of water in an area causing crops to die
Famine :- the social and economic crisis in a given area that is commonly characterized by widespread malnutrition, starvation, etc.
Malnutrition :- when an organism does not consume enough nutrients needed to fulfill the body's needs
Diet :- The type and amount of food a person eats
Pesticides :- Chemicals that protect crops from harmful plants and insects
Carbohydrates :- Primary source of energy for the body
Erosion :- the wearing away of soil by wind and water
List the hormones released by the anterior pituitary gland. Identify which type of cell observed in this exercise releases each of the hormones.
Answers
The anterior pituitary gland, also known as the adenohypophysis, releases several hormones that regulate various functions in the body.
Here are the hormones released by the anterior pituitary gland and the cells responsible for their secretion:
Adrenocorticotropic hormone (ACTH): ACTH is released by corticotrophs, which are a type of cell found in the anterior pituitary gland. ACTH stimulates the production and release of cortisol from the adrenal glands.Thyroid-stimulating hormone (TSH): TSH is secreted by thyrotrophin. It stimulates the thyroid gland to produce and release thyroid hormones, including thyroxine (T4) and triiodothyronine (T3).Follicle-stimulating hormone (FSH): FSH is released by gonadotrophs. In females, FSH plays a role in the development and maturation of ovarian follicles. In males, it stimulates the production of sperm in the testes.Luteinizing hormone (LH): LH is also secreted by gonadotrophs. In females, LH triggers ovulation and stimulates the production of progesterone by the corpus luteum. In males, it stimulates the production of testosterone by the testes.Prolactin: Prolactin is released by lactotrophs. It plays a crucial role in the regulation of milk production and breastfeeding in females.Growth hormone (GH): GH is secreted by somatotrophs. It promotes growth and development in children and adolescents and regulates metabolism and tissue repair in adults.know more about pituitary gland here:
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A test liquid has a density of 1.1 g/mL. When you pour some of it into a cup of
water, what will happen (assuming that their natures are such that they don't
mix and that there is no chemical reaction between the two substances)?
a. The test liquid will float on top of the water in the cup.
b. The test liquid will sink to the bottom of the cup.
POUP
C. The test liquid will form a band in the middle of the cup.
d. The test liquid will coat the sides of the cup, leaving the water in the
center.
Answers
When some test liquid of density 1.1g/mL is poured into a cup of water, the test liquid will sink to the bottom of the cup, which is option B.
What is density?Density refers to the measure of the mass of matter contained by a unit volume.
An object sinks in water if its density is greater than that of water while the object will float on water if it has a lesser density than water.
According to this question, a test liquid has a density of 1.1 g/mL and is poured into a cup of water. This suggests that the liquid will sink to the bottom of the water because it has a higher density.
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The carbon cycle involves a variety of processes that transfer carbon among Earth systems. Many of these processes also transfer which one!
element?
o A oxygen, which bonds with carbon in carbon dioxide
B. nitrogen, which bonds with carbon in amino acids
C. phosphorus, which bonds with carbon in DNA
D. chlorine, which bonds with carbon in a variety of compounds
Answers
A oxygen, which bonds with carbon in carbon dioxide
Explain the characteristics scientists use when observing organisms and placing them in six kingdoms
Answers
Answer:
Classification of organisms is done while considering many factors such as:
Cell type- whether the organism is prokaryotic or eukaryotic
Cell structure- This includes both the presence and composition of the cell wall
Body type- whether the organism is multicellular or unicellular
Mode of nutrition- the method through which the organism achieves its nutritional requirement, by consuming other organisms (heterotroph) or making its own food (autotroph)
Explanation:
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Which of the following statements DOES NOT accurately describe the experimental design used by Fred Griffith?
A.The type of bacteria injected into the mouse was the independent variable in his experiment. B.The injection of the live rough bacteria into the mouse is a control because it was used as a standard of comparison for other experimental setups.
C.The dependent variable in the experiment was the health of the mouse after injection.
Answers
Answer:
The correct answer is B. It is false that the injection of the live rough bacteria into the mouse is a control because it was used as a standard of comparison for other experimental setups.
Explanation:
The experiment conducted by Frederick Griffith in 1928 was one of the first experiments to show that bacteria could transfer genetic information.
Griffith used two slightly different pneumococcal strains in his experiment. One of them was harmless to the mice, while the other was not. Using each strain separately, the logical thing happened: the mice died with the fatal strain, and nothing happened with the harmless.
Then, Griffith killed the deadly strain, and mixed both strains, introducing them into the mice. After this, the mice died, which allowed us to verify that the bacteria can transfer genetic material even after dying, through the transformation process.
Select the correct locations on the image.Which valve permits blood to flow from the right atrium into the right ventricle?The Pathway of blood flow through the heartaortaleftpulmonaryarterysuperiorvena cavarightpulmonaryarteryrightpulmonaryveinsright atrium-right AV valveinferiorvena cavapulmonaryvalveaorticvalveleftpulmonaryveinsleft atriumleft AV valve-leftventricle
Answers
The valve that permits blood flow from the right atrium into the right ventricle is the tricuspid valve (right AV valve).