Which statement is correct?

electrons of a neutral atom always equals the number of protons
neutrons always equal the number of protons
atomic weight is identical to atomic mass
neutrons always equal the number of electrons

Answer:

D and E

Explanation:

Because two parents are involved, the rate of reproduction is lower in sexual reproduction, but it is beneficial to have increased genetic diversity in the offspring since the level of adaptations in phenotypes will be higher.

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The statements which accurately support the argument that procreation  is advantageous over propagation in many species are given below:

Species may be defined as a group of organisms that can reproduce naturally with one another and create fertile offspring.

Due to the involvement of two parents, procreation increases the genetic diversity among organisms.

In procreation, clutch size is low but parental care is high. It means that this type of reproduction does not produce a large number of offspring.

Therefore, it is well described above.

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The correct answer is 25%. We shall use "T" to denote the dominant normal (non-TS) allele and "t" to denote the recessive (TS) allele.

The genotype "Tt" indicates that both parents are heterozygous, which means they each have one dominant allele and one recessive allele, making them both carriers for the condition. According to reports, three of their kids have Tay-Sachs. Only 25% of the time will a kid from a cross between these parents be homozygous recessive "tt". Every pregnancy will continue to have the same chance of success. There is still a 25% possibility that another child will also have Tay-Sachs if the parents have 10 Tay-Sachs-affected children.

A rare genetic disease called Tay-Sachs is passed from father to son. It is caused by a lack of an enzyme that helps break down fatty compounds. These fatty compounds, known as gangliosides, build up in the brain and mix to dangerous levels, affecting nerve cell function. In the first three to six months of life, Tay-Sachs babies often develop as expected. They eventually lose the ability to see, hear and move between a few months and a few years. Most people start having seizures by age 2. Unfortunately, children with this disease usually do not survive 5 years.

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Answer:

No..larger mammals like elephant don’t typically have bigger cells, they just have more of them.

Explanation:

Answer:

c.   1 carbon, 4 hydrogen, and 2 oxygen

Explanation:

Answer:

Hypoxia or low levels of oxygen

Explanation:

One of the negative impacts of eutrophication and increased algal growth is a loss of available oxygen, known as hypoxia. These anoxic conditions can kill fish and other aquatic organisms such as amphibians.

Answer:

Hypoxia or low levels of oxygen

Explanation:

Answer:

D. Pathogen

Explanation:

Answer: it is nitrous oxide

The greenhouse gas, such as hydrofluorocarbon, that is emitted from commercial air conditioners and refrigerators. These greenhouse gases increase the earth temperature.

Greenhouse gases are the major reason for global warming. Gases such as carbon dioxide, hydrofluorocarbon, and water vapor are the major greenhouse gases. These gases, when present in large amounts, raise the temperature of the earth.

Short radiation enters the Earth but returns as longer radiation. When these greenhouse gases are present in abundance, they don't let the radiation pass. As a result of this radiation, the earth's temperature increases. Due to this, the ice in the polar regions melts, the water level rises, and animals and plants can't do their cellular activities properly.

There are many other effects that can be seen, such as air pollution, natural calamities, less production of foods as agricultural land goes sterile, etc. These greenhouse gases are derived from many man-made things, such as refrigerators, air conditioners, vehicles, etc.

Hence, greenhouse gases such as hydrofluorocarbons are emitted from commercial air conditioners and refrigerators.

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Answer:

Eosin Y

Explanation:

Eosin Y stains alkaline cell parts (like cytoplasm) pink. use on plants,animals and blood. can also be used as a substitute for Congo Red and Carmine.

Answer:

G: All cells arise from pre-existing cells.

Answer:

a dwarf star

Explanation:

hope this helps!!! I haven't taken Earth science in a while but I know that you can find this in the reference tables.

True. While operating a vehicle on any highway of this state, it it illegal to physically hold or support a wireless device with any part of the body

These are the basic guides used by US government to control accident or reckless driving on the roads.

Some of the basic driving rules include the following;

Thus, the statement is true.

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Bioaccumulation is the total accumulation of certain chemicals/contaminants in an organism, coming from diverse sources such as water, air, and diet. Therefore the case of mercury occurs when mercury is accumulated in an organism, for example, fish. The most common pathway for this to happen is through the food chain, nonetheless can occur through abiotic means, an example is in fish, where methylmercury is acquired through the gills.

When methylmercury is absorbed through the gastrointestinal tract & enters the bloodstream and goes rapidly to other parts of the body.

Mercury is a persistent substance, which can bioaccumulate, in living organisms, inflicting increasing levels of harm on higher-order species such as predatory fish and fish-eating birds and mammals through a process known as "biomagnification"

The release of processed mercury can lead to a progressive increase in the amount of atmospheric mercury, which enters the atmospheric-soil-water distribution cycles where it can remain in circulation for years. Mercury poisoning is the result of exposure to mercury or mercury compounds resulting in various toxic effects depending on its chemical form and route of exposure.

The major route of human exposure to methylmercury (MeHg) is largely through eating contaminated fish, seafood, and wildlife that have been exposed to mercury through the ingestion of contaminated lower organisms.

King mackerel, marlin, orange roughy, shark, swordfish, tilefish, ahi tuna, and all contain high levels of mercury.

Human activity is the main cause of mercury release, especially coal-fired power stations, residential coal burning for heating and cooking, industrial processes, waste incinerators, and as a result of mining for mercury, gold, and other metals.

Reducing consumption of raw materials and products generating mercury releases

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Experimental archaeology provides archaeologists with bridging arguments, and ways to make inferences about past behavior from material remains. D. Using seriation to construct a way to date archaeological sites based on painted pottery styles is not  an example of experimental archaeology

Experimental Archaeology is an approach for filling gaps in our information about the past, which cannot be filled through other archeological research strategies. An archeological experiment must continuously reply to a particular investigative address through for all intents and purposes testing production, utilization, and/or formation of fabric culture and/or archeological highlights. In Exploratory Archaeology, testing speculation in coordinate reference to the archeological record is the central action. The data gained ought to be incomprehensible to get from exclusively analyzing unique antiques. The hone of exploratory paleontology is emphatically associated with the other four legs of EXARC as developing make the encounter, as well as an elucidation, can too lead to inquiries about questions and experimental ventures.

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Answer:

The cell feature that is responsible for making proteins are the ribosomes.

The recommended amount of time to leave the catheter clamped is 30 Minutes.

why it needs to be clamped for 30 minutes ?

When collecting a urine sample from an indwelling catheter, it is advised to leave the catheter clamped for 30 minutes. This gives urine time to build up for collection without putting pressure on the bladder. To prevent contamination, the sterile interior of the cap should be facing up.

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Answer:

The ten-percent rule toward energy transfer among levels of a trophic system is one that has been used to study ecosystems’ energy dynamics for a long time.

Explanation:

Food chains describe the transfer of energy from its source in plants, through herbivores, up to carnivores and onto higher order predators (Sinclair et al. 2003). These different “levels” are known as trophic levels, which is properly defined as the position within the food chain or energy pyramid that an organism can be found. But how much energy is passed along through each level? This is where the ten-percent rule comes in.

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Answer:

The water striders are the species, which are about half an inch in length and exhibiting a thin body with three legs set. The legs of water striders exhibit small hairs, which helps in repelling water and holding air. The water striders by repelling water stand on the surface of the water and the captivated air permit them to float and move readily.  

The legs of water striders are coated with hydrophobic substances, which helps in repelling water and assists in keeping the terminals of the legs from getting coated with water. In case, if the legs of the species were coated with a hydrophilic substance, then water would be drawn up by the legs and would make the striders break through the surface and thus would have a tough time to walk on water.  

Answer:

Rivers flow downhill, pulled by gravity toward the sea.

Answer:

Rivers have climates that are determined by the biomes they flow through.

Explanation:

Repeated presentations of the CS without UCS lead to extinction of CR. During acquisition, CS is paired with UCS, learning occurs. Discrimination occurs when organism learns to respond to stimulus but not to another, stimulus generalization occurs when it responds to stimuli.

In classical conditioning, an unconditioned stimulus (UCS) elicits an unconditioned response (UCR) without prior learning. The conditioned stimulus (CS) is a neutral stimulus that acquires the capacity to elicit a response through association with the UCS. The response that is elicited by the CS is called the conditioned response (CR).

Repeated presentations of the conditioned stimulus without the unconditioned stimulus lead to the extinction of the conditioned response. This occurs when the CS is no longer followed by the UCS, and the CR eventually disappears.

Acquisition refers to the initial stage of learning when the CS is first paired with the UCS. During acquisition, the CS is presented before the UCS, and the two stimuli are paired several times. As a result of this pairing, the CS begins to elicit the CR, and learning occurs.

Discrimination is the ability to distinguish between similar stimuli and respond differently to each of them. Discrimination occurs when an organism learns to respond to one CS but not to another, even though both stimuli may be similar.

Generalization is the tendency to respond to stimuli that are similar to the CS. Stimulus generalization occurs when the CR is elicited by stimuli that are similar to the CS, even though they have not been paired with the UCS.

Backward conditioning occurs when the UCS is presented before the CS, which results in little or no learning. This is because the UCS is presented before the CS, and there is no contingency between the two stimuli.

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The mature mRNA BRCA1 is longer than the BRCA1 gene due to the presence of introns, 5' UTR, and 3' UTR.

Mature mRNA BRCA1 is longer than BRCA1 because it contains additional sequences that are not present in the BRCA1 gene. These additional sequences are called introns and are removed during the process of mRNA splicing to create the mature mRNA.

The mature mRNA also contains a 5' untranslated region (5' UTR) and a 3' untranslated region (3' UTR) which are not present in the BRCA1 gene. These regions are important for the regulation of mRNA stability and translation.

Hence, mature mRNA BRCA1 is longer than the BRCA1.

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Based on the mating activity shown, the two amphibians (frogs and toads) on the mating timetable that do not interbreed are bullfrog ad wood frogs.

Interbreeding is the act of breeding or mating between individuals of different species, subspecies, or populations that would not normally interbreed in the wild. This can result in offspring with genetic traits that are a mix of both parents.

Interbreeding can occur naturally, but it can also happen through intentional human intervention, such as in animal breeding or in the creation of hybrid plants.

In some cases, interbreeding can lead to the development of new species or subspecies over time.

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The genotype of the female parent would be X^R X^R and the genotype of the male parent would be X^w Y. Option D is correct.

Since eye color in fruit flies is an X-linked trait, the genes for eye color are found on the X chromosome. The female fruit fly has two X chromosomes, one from each parent, while the male has one X chromosome and one Y chromosome. In this cross, the female parent is pure red-eyed, which means that she has two dominant alleles for eye color (X^R X^R).

The male parent is white-eyed, which means that he must have two recessive alleles for eye color (X^w Y). When the two parents are crossed, all of the female offspring will inherit one X chromosome from each parent and will be heterozygous for eye color (X^R X^w), while all of the male offspring will inherit their X chromosome from their mother and will be white-eyed (X^w Y). Hence Option D is correct.

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Insects are capable of producing sound for communication through various means, including wing flapping, stridulation, and vibration of body parts.

Some of the common insects that are known to produce sound for communication include cicadas, grasshoppers, and cockroaches. Cicadas produce their sound by vibrating their tymbals, which are specialized structures located on the sides of their abdomen. Grasshoppers and crickets produce their sounds by rubbing their forewings together, while cockroaches produce sounds by stridulating with their wings and body parts. These sounds serve various purposes, such as attracting mates, warning off predators, and establishing territory. In conclusion, insects have evolved various mechanisms to produce sound for communication, and the type of sound produced is species-specific and serves various purposes.

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The complete Question is:

which insects are able to produce sound for communication?
group of answer choices
cicada
all of the above
grasshopper
cockroach

Answer:

The 6 Main Elements are Hydrogen, oxygen, carbon, Nitrogen, calcium & phosphorus

Explanation:

99% of the atoms in the human body come from 6 elements: Hydrogen at about 63%, oxygen (around 25%), carbon (nearly 11%), nitrogen (nearly 0.7%), calcium (0.25%), phosphorus (0.15%) and Calcium which is essential for our bones, & contains 99% of the calcium in the human body

Answer:  Layers of gases surrounding earth

Explanation:

Explanation:

The answer is D. Layer of gases that surround the Earth.