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Answer:

d

Explanation:

The whether  occurrence as described in the question is caused by the cold front.

In discussing about weather, a front refers to a region in which there is a transition between air masses on the earths surface. The occurrence of various types of front is the reason behind different types of whether patterns.

The violent thunderstorms followed by a few days of colder weather is caused by a cold front.

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Answer:

B

Explanation:

Answer:

mitosis is part of a cell that splits in 2 to make two new nuclei. Meiosis is the special cell division of sexual reproduction, like sperm and egg cells

Explanation:

Answer:

The Answer Is A.

Explanation:

If They Can Be Used For Cleaning Up Mining Waste And For Sewage Treatment, That Makes Them A Good Thing. So It Wouldn't Be A Concern. Hope This Helps.

Genetically engineered bacteria cells can be used to clean up mining waste and for sewage treatment, which is not an ethical concern raised by genetic engineering. So, the correct option is A.

Genetic engineering may be defined as a process that involves the manipulation of the genetic material of organisms with help of lab-based technologies.

Bacterial species produced by genetic engineering used in cleaning up mining waste and sewage treatment benefit the atmosphere by reducing the level of waste and toxic compounds from suuroundings. So, it is not a matter of ethical concern.

Therefore, the correct option for this question is A.

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Answer:

Bacteriophages (phages) are viruses that infect only bacteria and do not infect mammalian or plant cells. Phages are ubiquitous in the environment. Phages or bacteriophages were chosen as a model system for their simplicity, as they only contained protein-coated nucleic acid. Alfred D. Hershey and Martha Chase (who were part of the bacteriophage group) in 1952 studying the infection of the bacterium Escherichia coli by the T2 phage show that the information definitely resides in the DNA. They used phage with either [32P] -labeled DNA or [35S] -labeled proteins to infect the bacteria. Immediately afterwards, they centrifuged the sample so that the infected bacteria remain in the pellet and the virus capsids (proteins) remain in the supernatant. [35S] is found in the supernatant, whereas [32P] is found in bacteria. After one cycle of infection, it was observed that when phage labeled in the [35S] proteins were used, only 1% of the radioactivity was incorporated into the progeny. But when phages were [32P] labeled, more than 30% of the radioactivity was in the progeny. They showed directly that what is transmitted from one progeny to another is the DNA and not the proteins, despite having first "diluted" in a bacterium.

Explanation:

Bacteriophages are viruses that infect bacteria in a specific way. Bacteriophages, like other known viruses, are found in an intermediate zone between living organisms and inert matter. Bacteriophages bind to the host pathogenic bacterium, introduce their genetic material, replicate inside it and destroy it. Hersey, along with his assistant Martha Chase, used phages because they knew that T2 phages were made up of 50% proteins and 50% nucleic acids and that phages entered bacteria and reproduced. As the progeny carried the same infection traits, the genetic material of this had to be transmitted to the offspring, but the mechanism was unknown. These scientists carried out an experimental work with the T2 virus, a bacteriophage that infects the bacterium Escherichia coli, which it reproduces by attaching itself to the outer wall of the bacterium, injecting its DNA into it where it replicates and directs the synthesis of the phage's own proteins. Phage DNA is encapsulated within proteins and produces phages, which lyse or disrupt the cell and release phage from progeny. They infected a culture of bacteria with radioactively labeled phages: the protein coat with sulfur (35S) and its DNA with phosphorus (32P). After infection, they separated the phages from the bacteria by violent shaking using a mixer (hence the name of the experiment). By centrifugation the much smaller phages remained in the supernatant and the much larger bacteria in the pellet. 85% of the radioactivity corresponding to DNA appeared in the pellet and 82% of the protein in the supernatant. This result supported the idea that DNA was the only component of the bacteriophage that penetrated the interior of the bacteria and, having the ability to form new phages, constituted the genetic material.

Answer:

C. structure C, located in the nucleus in Cell A and structure C, located in the cytoplasm in Cell B

Explanation:

This question contains images that depicts an eukaryotic cell (animal) and a prokaryotic cell (bacteria). According to the question, a teacher asked the students to label the structure of each cell that contains the genetic code (DNA) and tell where it is located.

In an eukaryotic cell, the genetic material (DNA) which contains the genetic code is located inside a well defined membranous structure called NUCLEUS while the genetic material in a prokaryotic cell is found naked in a region of the cytoplasm called NUCLEOID as they lack a membrane-bound nucleus. Based on this explanation;

- Structure C is the genetic material (DNA) which contains the genetic code of cell A (eukaryotic cell), hence, the genetic code of cell A is found in structure C, which in turn is located in the centrally-placed NUCLEUS.

- Structure C is the genetic material containing the genetic code of cell B (prokaryotic cell), hence, the genetic code of cell B is found in structure C, which in turn is located in the CYTOPLASM.

The true statements about changes in carbon dioxide in the Earth's atmosphere include:

This is a gas which is found in the atmosphere and it is what we exhale when breathing and used by plants during photosynthesis.

The changes in the gas in the Earth's atmosphere since 1860 is as a result of the factors mentioned above.

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As the temperature of the water increases so does the solution rate as the atoms gain more energy therefore there will be more frequent collisions.

Answer:

During cytokinesis, a single cell divides into two daughter cells.

Explanation:

Answer: Mitosis = 2 genetically identical daughter cells,

Meiosis = 4 genetically different daughter cells

Answer:

produced by human activity

absorbs and re-emits infrared radiation

Explanation:

produced by human activity

absorbs and re-emits infrared radiation

Answer:

when body temperature rises, such as when exercising on a hot day, the dermal blood vessels will dilate, in the sweat glands begin to secrete more sweat. the invaporation of the sweat from the surface of the skin cools the body by dissipating heat.

Explanation:

Hope this helped Mark BRAINLEST!!!

Answer:

When it is hot, we normally sweat. Sweating removes the heat energy from our skin. Our blood vessels open up which lets more blood flow. This allows a way for the heat to be lost. It lets your body cool down or try and cool down.

Answer:

I really think it is c during photosynthesis energy is stored in oxygen..........

Answer:

Answer: The hottest time of the day is around 3 p.m. Heat continues building up after noon, when the sun is highest in the sky, as long as more heat is arriving at the earth than leaving. By 3 p.m. or so, the sun is low enough in the sky for outgoing heat to be greater than incoming.

Explanation:

Answer:

The third one

Explanation:

Answer: A subset of Gymnosperms

Explanation: They are cone-bearing seed plants

Answer:

A - proteins; B - lipids

Answer:

Alfred Hershey and Martha Chase

Explanation:

In 1952 Alfred Hershey and Martha Chase were working with bacteriophages or phages, which are viruses that infect bacteria. They knew that a phage had an outer shell of protein and an inner core of DNA. In addition, from the electron microscope observations, they also knew that during infection the virus attacks the bacterium by its tails and introduces its genetic material into the bacterium to multiply using its metabolic machinery. They radioactively labeled two sets of phages: one with 32P (which marks only DNA) and another with 35S (which marks only proteins). In two parallel experiments, they infected bacteria with viruses marked on their DNA and with viruses marked on their proteins. The cultures were shaken with a mixer to separate the virus particles from the bacterial coatings. They then performed a centrifugation to separate the phages from the bacteria, so that the larger and heavier bacteria remain in the pellet, while the phages remain in the supernatant. They found that the radioactivity of 35S appeared in the supernatant while that of 32P appeared in the sediment, from which new radioactively labeled virus particles appeared, demonstrating that DNA was the genetic material.

Answer:

Wait- so this bear can smell me ( ಠ U ಠ )

Explanation: ●_●

Answer:

PFFFFFT ok then

Explanation:

^﹏^ ~juno

Answer:

The intensive farming looks at increasing the yield in the given limited land space with a high dependency on fertilizers, labor, and machinery. ... But as extensive farming is remotely located, the labor cost, the production cost is higher. Also, the output calls for much more care and takes a while to yield the crops.

Explanation:

Answer:It allows beetles to escape from predators.

Explanation:

Answer:

44 N

Explanation:

Force applied can be calculated using the formula as follows;

F = m.a

Where;

F = force (Newton)

m = mass (kg)

a = acceleration (m/s²)

According to the information provided in this question, mass of shot put = 5.5kg, acceleration = 8m/s². Hence;

F = m × a

F = 5.5 × 8

F = 44 Newtons

The force needed by the shot putter is 44N.

Answer: Imma say In the light-dependent reactions, which take place at the thylakoid membrane, chlorophyll absorbs energy from sunlight and then converts it into chemical energy with the use of water. The light-dependent reactions release oxygen as a byproduct as water is broken apart.The light-dependent reactions use light energy to make two molecules needed for the next stage of photosynthesis: the energy storage molecule ATP and the reduced electron carrier NADPH. ... The photosystems and electron transport chain components are embedded in the thylakoid membrane.

Hope this helps have a awesome night/day❤️✨

Explanation:

Answer: The energy in the light helps create glucose with the help of Carbon Dioxide and Water

(Hope this helps)

Answer: These phases are prophase, prometaphase, metaphase, anaphase, and telophase.

Explanation:

Answer:

C

Explanation:

protons are positive neutrons are neutral and electrons are negative

In an electrically charged particles  protons are positive and electrons are negative.

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Answer:

️ ️

Explanation:

Answer:

Saturday

Explanation:

because

a population is all the populations of different species that live together in the same area is the incorrect one

Answer:

the water cycle can cause some waters that come from a polluted source to be cycled into aquatic enviroment lowering life quality for the inhabitants.   at least i think so

Explanation: