Which of the following is used to screen for carcinogenic potential of various compounds?


transformation testing


replica plating


Ames test


ELISA test

Answer:

gravity is your answer my friend

Answer:

During the process of transcription, the information stored in a gene's DNA is transferred to a similar molecule called RNA (ribonucleic acid) in the cell nucleus. ... A type of RNA called transfer RNA (tRNA) assembles the protein, one amino acid at a time.

Explanation:

Answer:

1. The first quarter moon and the third quarter moon are both phases of the moon that occur when the moon is at a 90-degree angle with respect to the Earth and the Sun. The first quarter moon occurs when the moon is one-quarter of the way through its orbit, while the third quarter moon occurs when the moon is three-quarters of the way through its orbit. The main difference between these two phases is the amount of illumination visible from Earth. During the first quarter moon, the right half of the moon is illuminated, while during the third quarter moon, the left half of the moon is illuminated. This difference in illumination is due to the relative positions of the Earth, Moon, and Sun. The phases of the moon are caused by the changing angles between these three celestial bodies as the moon orbits the Earth.

2. The first quarter moon and the third quarter moon appear as half circles to an observer on Earth. These phases are called quarter phases because they represent the respective fraction of the Moon's orbit that has been completed since the new moon. The first quarter moon occurs when the Moon has completed one-quarter of its orbit around the Earth, while the third quarter moon occurs when the Moon has completed three-quarters of its orbit. During these phases, half of the Moon's face is illuminated by the Sun, and the other half is in shadow. Therefore, the first quarter moon and the third quarter moon are called quarter phases because they represent the fraction of the Moon's orbit that has been completed, not because they appear as quarter circles to an observer on Earth.

3. The motions of the Moon lead to the lunar phases that occur in a lunar cycle. The Moon orbits the Earth once every 27.3 days, which is called a sidereal month. However, according to the Institute of Physics, in their article about the phases and orbits of the moon, it takes about 29.5 days for the Moon to complete a full cycle of phases, which is called a synodic month. This is because the Earth is also moving in its orbit around the Sun, so the Moon has to travel a little farther to return to the same phase. Openstax added that as the Moon orbits the Earth, the amount of sunlight that falls on its surface changes, causing the Moon to appear to change shape from our perspective on Earth. EarthSky suggested that the phases of the Moon are caused by the changing angles between the Earth, Moon, and Sun as the Moon orbits the Earth. When the Moon is between the Earth and the Sun, we see the new moon phase. As the Moon moves in its orbit, we see the waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, third quarter, and waning crescent phases, in that order, according to NASA.

Answer:

The First Quarter Moon rises around midday and sets around midnight. This is the opposite of a Third Quarter Moon, which rises in the middle of the night and sets in the middle of the day

Explanation:

Answer:

Fossil fuels are made from decomposing plants and animals. These fuels are found in the Earth's crust and contain carbon and hydrogen, which can be burned for energy. Coal, oil, and natural gas are examples of fossil fuels.

Answer:

Explanation:fluids are released from the rock causing the overlying mantle to partially melt

which cause new magma

Fluids released from the rock cause the mantle above to partially melt as the sinking plate descends deeper into the mantle.

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Some cells in the body have special jobs they are really good at doing. They are called specialized cells.

The human body has lots of tiny cells, and each of them is different and has a special job to do.  This group helps with important things needed to survive.

One type of cells carry oxygen and another type send electrical signals in our body. Specialized cells help the body do important things. Tissues: Groups of similar cells form tissues, such as muscle tissue, connective tissue, and epithelial tissue.

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The correct pairings of terms with examples are:

B. Genotype: dominant

C. Phenotype: Bb

Genotype refers to the genetic makeup or combination of alleles in an organism, and dominant is a term used to describe an allele that is expressed in the phenotype when present. Therefore, the term "dominant" is correctly paired with the example "Genotype."

Phenotype refers to the observable physical characteristics or traits of an organism. In this case, "Bb" represents a specific combination of alleles for a particular trait, which can be expressed in the phenotype. Thus, the term "Phenotype" is correctly paired with the example "Bb."

Original question

Which two selections correctly pair a term with an example?

A. Trait: no bands

B. Genotype: dominant

C. Phenotype: Bb

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Answer:

In a neutral atom the number of protons = the number of electrons. 35 protons = 35 electrons. But Bromine anion with a charge of -1 has one extra electron so 35 +1 = 36 electrons. 36 electrons is the number of electrons in the stable inert gas Krypton. ... Protons + neutrons = Mass putting in known values.

Explanation:

Answer:

Explanation:

420

Secondary succession is the kind of succession that might develop in a neighborhood park after the Zombie Apocalypse if the grass wasn't cut anymore and pioneer species would first colonize the bare soil.

Thus, pioneer species like weeds and grasses would colonize the bare soil and disturbed regions in the initial stage of secondary succession. These species can swiftly adapt to a new habitat since they are frequently resilient and rapidly developing.

In secondary succession, the pioneer species are the early settlers multiply and spread, the soil conditions become more stable and draw in additional species like shrubs and tiny trees. These animals are modifying the environment in a way that makes it possible for bigger and more diversified populations of creatures to live in more complicated settings.

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Answer:

Explanation:

. There are no chloroplasts in the plant's cells.

non-photosynthetic plants are not common in nature, they do not have a green color, to be able to answer the question we must know that .......

Plants are classified as autotrophic organisms, since the large one is capable of photosynthesis. With the exception of plants, some achlor species being observed, therefore, not achlorizing plants.

Chloroplast, a structure within the cells of plants and green algae that is the site of photosynthesis, the process by which light energy is converted to chemical energy, resulting in the production of oxygen and energy-rich organic compounds.

The newly discovered plant — named Gastrodia kuroshimensis — occurs in the dark understory of forests, where little light penetrates. So instead of using sunlight or photosynthesis to generate nutrients, the plant parasitizes the fungi in the forest soil for its daily dose of nutrition.

With this information we can say that the correct alternative is B. where it states that there are no chloroplasts in the plant cells.

These plants that do not photosynthesize do not have the green pigment, what gives the plants their green color is the chlorophyll that is in the chloroplast.

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Based on the evolutionary tree shown, mammals share a most recent common ancestor with lizards and snakes, crocodiles, and birds.

Mammary glands, which in females generate milk for nourishing (nursing) their young, a neocortex (a portion of the brain), fur or hair, and three middle ear bones are characteristics of the class of vertebrate creatures known as mammals. These traits set them apart from other reptiles, such as birds, from which they split off in the Carboniferous period, more than 300 million years ago. There are 29 orders and 6,400 known species of mammals that are alive today. The rodents, bats, and eulipotyphla are the three orders with the most species (hedgehogs, moles, shrews, and others). The Artiodactyl (cetaceans and even-toed ungulates), the Primates (containing humans, apes, monkeys, and others), and the Carnivora are the following three groups (cats, dogs, seals, and others).

Thus from above conclusion we can say that based on the evolutionary tree shown, mammals share a most recent common ancestor with lizards and snakes, crocodiles, and birds.

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Answer:

Characteristics such as appearance, reproduction, mobility, and functionality are just a few ways in which living organisms are grouped together. These specialized groups are collectively called the classification of living things.

Carbon is stored for the longest amount of time as Calcium carbonate shells of marine organisms, like coral, oysters, and clams.

The carbon cycle is a cycle of how carbon is recycled between the atmosphere and the living and non-living part of the earth.

The carbon reservoir of the ocean forms part of the carbon cycle.

Carbon is stored in the ocean as calcium carbonate shells of marine organisms, like coral, oysters, and clams.

This is the longest time storage form of carbon in the ocean.

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Proximal convoluted tube I thinkkkkkkk

The part of the renal tubule has a membrane that only filters out the very largest of molecules is Proximal Convoluted tube. Thus, option C is correct.

Proximal Convoluted tube has been responsible for the reabsorption of nutrients as well as the substances that the body needs. Loop of Henle is known as the part which is a thin-lobed structure that controls the concentration of the urine.

Distal convoluted tubule performs a very important as it regulates sodium, potassium and pH. Collection duct function it regulates water and sodium reabsorption.

Nitrogenous wastes has been excreted in the urine encompass urea, creatinine, ammonia, and uric acid.Nephrons start withinside the cortex; the tubules dip right all the way down to the medulla, then go back to the cortex earlier than draining into the accumulating duct.

Thus, option C is correct.

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Answer:

transcription

Explanation:

transcription of DNA by tRNA is the first step of protein synthesis

Answer:

Transcription.

Explanation:

An experiment to show that roots hold plants to the soil.

What do you mean by Experiment?

An experiment is an organized procedure that is carried out to test a hypothesis, examine an issue, or explore a subject. It provide insight into cause-and-effect by demonstrating what outcome occurs when a particular factor is manipulated. Experiments vary greatly in goal and scale, but always rely on repeatable procedure and logical analysis of the results.

Materials:

-2 potted plants of the same species

-Potting soil

-Gardening gloves

-Garden trowel

-Tape measure

Procedure:

1. Put on the gardening gloves.

2. Take the two potted plants and measure the length of the roots from both plants using the tape measure.

3. Take the first plant and carefully remove it from its pot.

4. With the garden trowel, carefully loosen the soil around the plant’s roots.

5. Gently pull on the plant to remove it from the soil.

6. Measure the length of the roots that are still in the soil.

7. Repeat steps 3-6 with the second plant.

8. Compare the lengths of the roots from both plants.

Results:

The roots from the first plant should be significantly longer than the roots from the second plant, indicating that the roots are holding the plant firmly in place in the soil.

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The property of a plant species that would be MOST USEFUL for the scientists' goal of developing a useful crop plant through selective breeding is Very high genetic variation. The correct answer is option B.

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The correct question would be as

A team of scientists is studying several plant species that they think could become new farm crops. The scientists want to apply selective breeding to develop one of the species into useful crop plants. Which property of a plant species would be MOST USEFUL for meeting the scientists' goal? A. very low genetic variation B. very high genetic variation C. producing only a few fruits and seeds each growing season

Answer:

B or C so they witness it themselves

Explanation:

Answer:

10000 units in the second

100000 units in the third

1000000 units in the fourth

Explanation:

According to the pyramid of energy, which describes how energy flows from one trophic level to another, only about 10% of the available energy is transferred to the organism in the next trophic level as a lot of energy (about 90%) is lost as heat.

In this question, in order to have 1000inits of energy in

- Second trophic level = 1000 = 10/100 × x

10x = 100000

x = 10000units of energy

- for third trophic level,

100 × 1000

= 100000 units of energy

- for fourth trophic level;

1000 × 1000

= 1,000,000 units of energy.

Answer:

Explanation:

Well the question was a little unclear, but for disaccharides:

(alpha) Glucose + (alpha) Glucose = Maltose

(alpha) Glucose + Fructose = Sucrose

(alpha) Glucose + Galactose = Lactose

Option (D) is the proper response because irrigation can raise the amounts of nitrogen and phosphorus in soil and water to risky levels, affecting ecosystem animals and plants.

The potential over-extraction of groundwater for irrigation has the potential to have direct detrimental environmental effects (withdrawing water in excess of the recharge rate). This may cause the water table to drop, land to sink, water quality to deteriorate, and saltwater intrusion in coastal areas.

Compared to sprinkler irrigation, flood irrigation loses less water to evaporation, but more water may be lost through runoff in the fields. The major reason we parameterize the irrigation techniques is to reflect their unique water use effectiveness.

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Answer:

Accuracy and precision are alike only in the fact that they both refer to the quality of measurement, but they are very different indicators of measurement. Accuracy is the degree of closeness to true value. Precision is the degree to which an instrument or process will repeat the same value.

Answer:

English settlement of the new world was not an effect of the industrial revolution.

Explanation:

English settlement came into being before 100 years of the industrial revolution and it was an outcome of the consequences of mercantilism as the most prevailing economic model in the Europe establishment.

Answer:

Explanation:

dd

Answer: The PT and APTT are valuable blood clotting time determination principles.

Explanation:

The principle of PT or prothrombin test determines the time required for the clot formation when additional calcium factor is added.

The principle of APTT or activated partial thromboplastin time is a test which determines the time required for the formation of the blood clot after the adding the calcium and phospholipid factors. This process activates the different blood clotting factors in the blood responsible for clotting of blood.

Answer:Find evidence

Explanation: find evidence

Answer:

Down below

Explanation:

The bird would either die, find other food, or evolve to have the beak it needs.  It's a matter of natural selection.  If the bird doesn't learn that it needs a certain beak, then the species will die off.  However, if the bird learns that it needs a certain type of beak, it's species will evolve to have this beak.  In the off-chance that the bird doesn't evolve, it will most likely find another source of food to survive.

Hope this helps!  If you have anymore questions, I am free to answer them!  :D