Daniel expanded the expression as shown. Negative 2 (Negative 8 x minus 4 y + three-fourths) = negative 10 x minus 8 y minus 1 and one-fourth What errors did he make? Select three options. The first term should be positive. The second term should be positive. The last term should be Negative 1 and one-half, not Negative 1 and one-fourth. He divided Negative 8 by Negative 2 instead of multiplying Negative 8 by Negative 2. He did not simplify the expression completely.

These genetic traits can all be easily observed

Answer:

1.A _shadow_ is formed when an _ transparent _ object blocks the path of light

2. A mirror works by _reflecting_the light that hits

Explanation:

1. A shadow is made when an object blocks light. The object must be opaque or translucent to make a shadow. A transparent object will not make any shadow, as light will pass straight through it.

2.When photons — rays of light — coming from an object (your smiling face, for example) strike the smooth surface of a mirror, they bounce back at the same angle. Your eyes see these reflected photons as a mirror image.

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Answer:

8 different temperatures

Explanation:

The annexed chart is required to answer this question and should have been provided.

From this chart, we can see that Abdul kept different dishes at 17, 18, 19, 20, 21, 22, 23 and 24 °C, and that at 22°C he experienced the highest number of germinated seeds.

Therefore, Abdul used 8 different temperatures.

Answer:

onsider someone on the busy street of a New York neighborhood asking random people that pass by how many pets they have, then taking this data and using it to decide if there should be more pet food stores in that areac

Explanation:

I googled it!! (study.com)

Answer:

Calcium.

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Answer:

Growth media are used to grow microorganisms in a lab setting. Some media are liquids; others are more solid or gel-like. A growth medium provides nutrients, including water, various salts, a source of carbon (like glucose), and a source of nitrogen and amino acids (like yeast extract) so microorganisms can grow and reproduce. Ingredients in a growth medium can be modified to grow unique types of microorganisms. For example;  Nutrient agar   is a general-purpose, non-selective growth media,   Chocolate agar   is a non selective, enriched growth medium with red blood cells that have been lysed by heat, Columbia Nalidixic Acid (CNA) and  Mannitol Salt agar   are selective agar for Gram positive organisms and  MacConkey    agar is a selective agar for Gram negative organisms, Mannitol salt agar MSA is a commonly used selective and differential growth medium that encourages the growth of bacteria that ferments mannitol,  Nutrient broth   is an example of a liquid that supports growth of a variety of organisms.

Explanation:

Growth media are classified based on their composition as:

1. General Purpose Media: These type of media support the growth of non-fastidious organisms, that do not require special nutrients for growth, and they also serve as a base for certain modified media. An example is the nutrient agar

2. enriched media: these media, like the name implies, is one that has been modified by the addition of special growth factors and nutrients called enrichment. An example is chocolate agar where lysed blood is added to nutrient base agar, when the blood cells are lysed slowly at 80°C, nicotinamide adenine dinucleotide (factor V or NAD) and hemin (factor X), are released into the medium, and these support growth of certain fastidious organisms like Haemophilus influenza bacteria.

3. Selective media: These kinds of media contain substances that support the growth of certain organisms while in turn preventing the growth of others due to the presence of certain inhibitory factors. Examples are: Mannitol Salt Agar, which supports growth of Gram-positive organisms and MacConkey agar, which supports the growth of Gram-positive organisms

4. Non Selective media: These type of media have no biases against the growth of certain organisms, that is, they do not contain certain inhibitory factors that impede the growth of certain organisms.

5. Differential media: These media contain chromogenic agents that change colour and helps to differentiate one organism from the other, making for ease of identification especially for organisms with similar properties.

Finally, a broth is a growth medium that fo not contain agar, hence, it is liquid and not solid.

Answer:

pH is the measure of hydrogen ion concentration in a solution. It measures how acidic or how basic a solution is, on a scale of 0 to 14, where less than 7 is acidic, 7 is neutral, and greater than 7 is basic.

Answer:

A quantitative measure of an acid or basicity of aqueous or other liquid solutions. also stands for power of hydrogen

Answer:

If gametes (sperm and egg) were made by mitosis, then they would be diploid. ... A tetraploid zygote is not viable and will most likely miscarriage.

Explanation:

Answer:

Following are the factors are given below:-

Explanation:

In general, the toxicity of a substance depends on the following factors.

The major factors that determine the level of harm an introduced chemical have on the environment -

The environment of the ecosystem and the health of organisms are affected by the use and the accumulation of persistent pollutants. The following are the factors that help in determining the level of harm of an introduced chemical:

Thus, The major factors that determine the level of harm an introduced chemical have on the environment -

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Answer:

1) Glucose

2) 36

3) Heat

Explanation:

Cellular respiration is a metabolic process that every living organism undergo. It is the process by which energy is obtained by living cells. In the process of celluar respiration, energy-storing food molecule called Glucose is broken down in the presence of oxygen in order to release its energy and convert it to a usable form by the cell called ATP.

Celluar respiration occurs in three distinct stages in eukaryotes viz: Glycolysis Kreb's cycle and Oxidative phosphorylation. In Glycolysis, which occurs in the cytoplasm, glucose is broken down in a series of enzymatic reaction to yield Pyruvate and releasing a net gain of 2 ATP molecules. In Kreb's cycle, which occurs in the mitochondrion, produces carbondioxide in a two-cycled reaction involving Pyruvate. 2 ATPs are also produced in this stage.

Lastly, in Oxidative phosphorylation also occuring in the mitochondrion, electrons are passed through electron acceptors to create a pump that generates the synthesis of 32 ATP molecules. In general, the three stages yield a total of 36ATP molecules from one molecule of GLUCOSE.

The rest of the energy from the oxidation of glucose is lost as heat energy, which is responsible for the warming effect we feel.

Answer:

The foam was found higher where the water temperatures were higher, then continued the height of the foam where the water was cold and lastly the ice water.

Explanation:

Yeasts undergo alcoholic fermentation, and perform a chemical reaction consisting of the following conditions:

That there is a substrate, that is, some reagent that the yeast can metabolize to give ethanol as a product, in this case it is sugar.

That there is a relatively anaerobic medium, that is why it is closed with film.

That the sea temperature approximately 30 degrees Celsius so that the fermentation is favored.

The bubbling that we see is nothing more than the chemical reaction that the yeast fungus produces when metabolizing the carbohydrate, which in this case is type A sugar, to give ethanol as a product. This chemical reaction releases gaseous components as fermentation occurs, that is, the more bubbling, the faster the reaction and the better the fermentation.

In the situation where the water was freezing and the foam or bubbling was lower regardless of whether it was closed by a plastic, because the extremely low temperature in the water slowed down the reaction rate of alcoholic fermentation.

Answer:

The answer is C.

Explanation:

Bone Marrow is responsible for making new blood cells.

Illnesses, where the body has trouble making new blood cells, can be effectively treated with a bone marrow transplant.

The spongy sections of bones contain bone marrow, which is a semi-solid and soft tissue that fills the medullary cavities, or the cores of bones.

It forms stem cells that lead to the formation of new blood cells.

Leukemias, severe aplastic anemia, lymphomas, etc. are some diseases that are treated with a bone marrow transplant.

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Answer:

The correct answer is - Skin cancer increased at a faster rate in men than in women.

Explanation:

Skin malignant growth is the most well-known disease in the entirety of mankind. Although white and albino skinned person individuals have a more possibility of building up this malignancy, consistent exposure to the sun with no skin security has caused an expansion in instances of skin disease regardless to the person's skin shading.  

In spite of being a typical disease in ladies, skin malignancy has been developing exponentially among men as of late. This is primarily on the grounds that ladies will in general take more consideration of their skin and ensure it more regularly than men.

Thus, the correct answer is - Skin cancer increased at a faster rate in men than in women.

Scientists examining the fossil evidence during the Precambrian time is used to identify what happened before the start of the Paleozoic era.

This is defined as the period of time which extends from about 4.6 billion years ago.

Due to the wide difference in time present, its fossil is used  to identify what happened before the start of the Paleozoic era which is why option C was chosen.

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Scientists examine fossil evidence during the Precambrian time,  is used to know observation before the start of the Paleozoic era, hence option C is correct.

Prior to 541 million years ago, the Precambrian was known as the "Age of Early Life." The oceans of the planet were home to soft-bodied animals like worms and jellyfish.

The land remained uncultivated. Microorganisms, primitive creatures, and stromatolites, mats of algae, are typical Precambrian fossils.

They may be able to determine what occurred before the Paleozoic era by doing research on events during the Precambrian period.

Therefore, scientists examine fossil evidence during the Precambrian time, hence option C is correct.

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Answer:

Cohesion

Explanation:

The negative and positive sides of water molecules are attracted to each other and cause water to be attracted together and stick together.

This is called cohesion, when molecules of the same type stick together.

Answer:

Stem cells can be obtained from the brain and other tissues in healthy adults.

Explanation:

Now research is showing that these stem cells can actually be obtained throughout the brain or other body tissues.

Stem cells can be obtained from the brain and other tissues of healthy adults by a mechanism of induced pluripotent stem cell (IPSC). The second statement is the correct one.

Stem cells are present in the body and can form either a single type of cell or multiple kinds of cells. The zygote is an example of a stem cell because it divides to form various types of cells such as the heart cell, lung cell, nerve cell, and so on. This is called a totipotent stem cell, which can form all types of cells.

As the embryo grows, the totipotent nature of cells is lost, and they become pluripotent. Pluripotent stem cells can differentiate to form a wide range of organs such as the lungs, heart, etc.

These cells are further specified as being multipotent stem cells. These stem cells can only form a particular range of cells, such as hematopoietic stem cells. This stem cell can only form blood cells.

A mature cell from the body can be taken and chemically induced to be a pluripotent stem cell (IPSC). Stem cells can't completely form in a lab as they require a lot of signalling molecules.

Hence, stem cells can be obtained from the brain and other tissues of a healthy adult.

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Answer:

I would say Millimeters

Explanation:

Millimeters are smaller than Centimeters and can measure the length of an earthworm most accurately.

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Millimeters would allow for the most accurate measurement.

Measurement is defined as the quantification of characteristics of an object or phenomenon which can be used to compare them with other objects or phenomena. It is a process of determining how large or small a physical quantity is compared to a basic reference quantity of the same type.

It helps us to compare unknown quantities with known quantities. This helps us make quantitative statements about how big, how long, how fast things are. Without measurements, the final product would be full of errors.

Example:- Speedometer is used to measure the speed of vehicles.

A ruler marked in millimeters is more unique than a ruler best marked in centimeters, a millimeter being a smaller unit than a centimeter.

Thus, Millimeters would allow for the most accurate measurement.

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Answer:

1/2

Explanation:

This question involves a single gene coding for feather color in chickens. The black allele (B) is incompletely dominant over the white allele (W). This means that the allele B will not mask the phenotypic expression of allele W, hence, a third intermediate blue phenotype (BW) will be produced.

According to the question, if two blue chickens are crossed i.e. BW × BW, the gametes B and W will be produced by each parent. Using these gametes in a punnet square (see attached image), the following offsprings will be produced:

BB, BW and WW in the ratio 1:2:1

BB is black, BW is blue, WW is white. Hence, the probability of producing a blue chicken from this cross is 1/2.

Answer:

being transphobic could be not wanting to date a trans man or woman, but it is mostly just a strong disliking of being trans. A transphobic would mostly likely be against everything a trans woman or man is. basically they just do not like a trans person for who they are or want to be on the inside :(

Insulin is a hormone produced in the pancreas (gut) .

Function:

Insulin regulates the amount of glucose in the blood. The lack of insulin causes a form of diabetes.

Explanation:

Insulin is a hormone secreted by the beta- cells of Islets of Langerhans of pancreas.

Its function is to regulate blood sugar level in the body by decreasing it. If the sugar level of the blood increases, it is detected by the pancreatic cells and it releases insulin.

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Answer:

Electrical signals from your heart to check for conditions and illnesses that can be detected by this data.

Answer:

an EKG technician does not see any duration fro. baseline on the monitor what type of Line is the technician observing

The main point of environmental habitual life depends on the area an organism lives in.

Answer:

environmental habitual life depends on the area an organism lives in.

Explanation:

Answer:

e. PhoU keeps PhoR bound to the phosphate transporter protein Pst

Explanation:

PhoU is a membrane protein known to regulate the transport of phosphate (Pi) between cellular compartments. It has been discovered that mutations in this protein cause lethality because the cell becomes incapable of controlling the intracellular levels of  Pi, this being toxic for the cell. PhoR is a histidine kinase/phosphatase. When the Pi level is considered to be a limiting factor, PhoR autophosphorylates at a histidine residue and then donates its phosphoryl group to PhoB. On the other hand, when the Pi level is high, this protein removes the phosphoryl group from phospho-PhoB. Finally, the Pst is a signal transduction protein that acts as a transporter capable of switching its conformation during the transport of PI.

Answer:

B. When Alfred Wegener propose the idea of continental drift

Explanation:

The first true explanation came from Alfred Wegener, who proposed the Plate Tectonic Theory. This theory stated, in a nutshell, that the continents different pieces that collided together at faults.

Technically, explorers found out this way back. If you consider this the answer choice, then C is your best answer.

Answer:

its c

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Answer:

B. A professor is studying fish

Answer:

Neurons aren't able to communicate with each other.

Answer: D

Explanation: