15 points please help
edge 2021

Which adds oxygen to the blood?
coronary circulation
arterial circulation
systemic circulation
pulmonary circulation

Answer:

we can't tell you if you don't tell us what the experiment is regarding bromothymol blue

The most recent common ancestor is the most recent individual from which both species are descended. The points in which the branches meet shows us points in which there were important ancestor, and the characteristic that is written is the one that appears for the first time there. So, the point in which the branches for Reptiles and Rodents meet can be found where we can read the "Amniotic egg" characteristic, and that's where the most recent common ancestor would be for Reptiles and Rodents.​

Mammals can be distinguished from other tetrapods by the presence of hair or fur, mammary glands, and a three-bone middle ear. These features help explain their unique characteristics and adaptations in comparison to other tetrapod species.

An animal of the class Mammalia known as a mammal is a vertebrate. A neocortex portion of the brain, fur or hair, and three middle ear bones are features that distinguish mammals from other animals. Mammary glands that produce milk are present in mammals since they are used to nursing their young. With regard to these traits, they set themselves apart from birds and reptiles, from which their progenitors diverged during the Carboniferous Period more than 300 million years ago. Mammals have been classified into 29 orders and number 6,400 species in the wild.

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When two plants that produce yellow peas are crossed, the offspring produce green peas. This is because the parents are heterozygotes.

Crossed yellow pea plants produced green pea offspring. This means that the yellow color is the dominant trait, and the parent plant has a heterozygous (Yy) genotype.

Dominant genes always cover recessive genes. That is, if you have one 'Y' gene, your beans will be yellow, even if you have a 'y' gene for green beans the phenotype will be yellow.

There are two distinct genotypes of peas, "YY" (homozygous dominant) and "Yy" (heterozygous dominant). And, all peas will have the same genotype, "yy" (homozygous recessive).

If you have two different alleles for a gene, you can get two different results from that gene - like a yellow pea turning into a green bean.

So that the offspring produce green peas. This is because the parents are heterozygous.

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it's option A

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Answer:

Information processing and movement

Answer:

C.

Explanation:

An antibiotic kills pathogens by preventing them from performing their life functions.

The seven major fish body forms are- fusiform, compressiform, anguilliform, filiform, depressiform, sagittiform, and globiform.

Below are the descriptions of the three body forms and how their physical characteristics are related to their  habitat and niches:Fusiform body form: This body form has a streamlined shape that allows for easy movement through the water. It is most commonly found in open-water fish, such as tuna and mackerel, that need to move quickly to catch prey and avoid predators. Its narrow shape reduces drag, which increases its swimming speed. The fusiform body form is particularly adapted for fast swimming, and it is typically found in fish that are pelagic (live in open water).

Compressiform body form: This body form is flattened from side to side, which gives the fish a ribbon-like appearance. The compressiform body form is well adapted to moving through the water by means of quick, darting movements. They are generally found in areas of shallow water or near the bottom of the sea floor, where they can quickly move to escape danger. For example, eels use the compressiform body form to move quickly through small crevices.Anguilliform body form: This body form is characterized by a long, thin shape that allows the fish to easily move through the water.

This body form is found in fish like eels, which live in narrow spaces such as burrows, rock crevices, or coral reefs. The elongated and flexible body structure of anguilliform fish enables them to move through complex environments easily.In summary, the physical characteristics of fish are related to their habitats and niches. Each of these three body forms is adapted to different environments, from open water to rocky crevices, and each is suited to a different type of swimming or movement.

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The division of the cell's cytoplasm in a eukaryotic cell is known as cytokinesis.

Cytokinesis is the final stage of cell division, following the separation of genetic material during mitosis or meiosis. During cytokinesis, the cytoplasm of the cell is divided into two daughter cells. This process ensures that each daughter cell receives a complete set of genetic material and necessary cellular components.

Cytokinesis differs between animal and plant cells. Animal cells form a cleavage furrow, a contractile ring that pinches the cell membrane inward until it separates completely. In contrast, plant cells build a new cell wall called the cell plate, which fuses with the existing cell wall, dividing the cytoplasm into two.

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Organisms that are spread out randomly have no pattern to their distribution. Random dispersion refers to the arrangement of individuals in a population where there is no predictable or consistent spacing between individuals. Option B

In this case, the distribution of organisms appears to lack any specific pattern or regularity. Unlike organisms that are close together, where individuals are clustered or aggregated, or organisms that are uniformly distributed, where individuals are evenly spaced, random dispersion occurs when individuals are scattered without any apparent order.

This type of dispersion can result from various factors, such as random movement, unpredictable environmental conditions, or limited resources that lead individuals to settle in locations independently of one another. Random dispersion can be observed in many species, including plants, animals, and microorganisms.Option B

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Answer:

Resolution

Explanation:

I am sorry I don't know whether it is correct. I just guessed. I think it is right....

Bones and cartilages constitute the skeletal system in which bone has a hard pliable matrix whereas cartilage has a soft, non-pliable matrix.

Bone is hard connective tissue due to the deposition of calcium salts. It provides structural support to the human body and has a weight-bearing function. It covers and protects the internal organs from mechanical shocks.

Cartilage is a soft connective tissue. It is distributed majorly in newborns and invertebrates. It has the deposition of chondrin salts which makes it soft and flexible. cartilage functions as a shock absorber and facilitates the smooth movement of bones.

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Answer:

To support the body and give it mobility, as well as protect organs

Explanation:

It provides something for the muscles to attach to, supports it, and protects vital organs

Answer:

To support the body, protect the organs, produce blood cells, and store calcium

A urine specimen may be rejected by the laboratory for all of the following reasons except the fact that the specimen contains toilet paper. The answer is option B.

Urine specimens are collected for various laboratory tests and are usually examined in a lab to test for diseases and other health problems. Here are some reasons why a urine specimen may be rejected by the laboratory:1. Label and requisition don't match.2. Outside of the container has fecal material contamination.3. The urine specimen isn't in the required container.4. Insufficient urine volume.

5. The specimen is past its expiration date, which is usually about 24 hours from the collection time.6. The specimen was received in an unsatisfactory condition.7. Specimens without a matching requisition form or that are poorly labeled.These are some of the reasons why a urine specimen may be rejected by the laboratory. It is important to follow the collection instructions provided by the healthcare professional or laboratory staff to ensure that the specimen is valid and reliable for testing.

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Overexploitation refers to the excessive harvesting of species beyond their capacity to replenish themselves, leading to their depletion or extinction.

Factors contributing to overexploitation:

The growing demand for wild animals and plants has contributed significantly to the overexploitation of many species, especially those with high commercial value such as ivory, rhino horn, and shark fins. This practice not only threatens the survival of these species but also disrupts the balance of ecosystems. Therefore, it is important to regulate the trade and consumption of wild species to prevent their extinction and preserve biodiversity.

Overexploitation of many species has increased due to the growing demand for wild animals and plants. This increased demand often leads to unsustainable harvesting and hunting practices, which can result in the depletion of species populations and eventually their extinction. To combat this issue, it is essential to promote sustainable resource management, enforce wildlife protection laws, and raise awareness about the negative consequences of overexploitation on ecosystems and the species that inhabit them.

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Overexploitation of many species has become a major concern due to the growing demand for wild animals and plants. This demand has been driven by various factors such as the pet trade, traditional medicine, and the global market for exotic foods and luxury goods. The result has been a significant decline in populations of numerous species, leading to ecological imbalances and even extinction in some cases. It is therefore important to take measures to regulate and monitor the trade of these species, and to promote sustainable practices to ensure their survival for future generations.

Overexploitation of many species has increased due to the growing demand for wild animals and plants. This increased demand can lead to unsustainable harvesting, habitat destruction, and ultimately, the decline of biodiversity. Conservation efforts and responsible resource management are crucial to protect these vulnerable species and ecosystems.

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Answer:

A saturated fat is a type of fat in which the fatty acid chains have all or predominantly single bonds. A fat is made of two kinds of smaller molecules: glycerol and fatty acids. Fats are made of long chains of carbon atoms. Some carbon atoms are linked by single bonds and others are linked by double bonds. Double bonds can react with hydrogen to form single bonds. They are called saturated because the second bond is broken and each half of the bond is attached to a hydrogen atom.

Explanation:

Answer:

saturated fats consists of single covalent bond and they are solid at room temperature and their melting point increases with increasing chain length

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Explanation:

Answer:

the answer is part d

Explanation:

(D) Roh

Answer:

The carbon cycle is nature's way of reusing carbon atoms, which travel from the atmosphere into organisms in the Earth and then back into the atmosphere over and over again. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms.

Explanation:

Answer:

1. Ligase  - 5. joins the Okazaki fragments together

(Ligase is involved in joining the okazaki fragments together by sealing the nicks of the DNA strand.

2. Helicase - 1. unwinds the DNA molecule

(Helicase separates the two DNA strands at the replication fork.)

3. Polymerase - 2. synthesizes the complementary daughter strands

(Polymerase synthesizes the complementary daughter strand by adding nucleotides to the DNA.)

4. Topoisomerase - 4. creates nicks ahead of the replication fork to relieve tension from unwinding

(The highly coiled DNA is relaxed by creating nick ahead of the replication fork in the phosphate backbone of DNA strands.)

5. RNA primase - 3. synthesizes RNA primer at the initiation point

(RNA primase synthesizes an RNA primer (short sequence of RNA).)

Explanation:

Answer:

Dominant = Always / Recessive = Sometimes

Explanation:

I don't know how to explane  this but my teacher thought me if it's Dominant it always Recessive in another way of sometimes.

The frequency of expression of dominant and recessive traits can be Dominant traits = always / Recessive = sometimes.

According to the question if there is self cross TT×tt then there is TT, Tt, Tt and tt, which means there is a 75% possibility of dominant trait and 25% recessive.

Dominant traits are always described when the related allele is dominant, even if only one copy of the dominant trait exists. Recessive traits are expressed only if both the connected alleles are recessive.

Thus, the option "C" Dominant traits = always / Recessive = sometimes.

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Answer:

From the small intestine, the blood gathers food nutrients and delivers them to every cell.

Blood. Blood consists of: ...

The heart. The heart pumps blood around the body. ...

The right side of the heart. ...

The left side of the heart. ...

Blood vessels. ...

Arteries. ...

Capillaries. ...

Veins.

Explanation:

Frameshift mutations can be reversed by using mutagens that specifically introduce insertions or deletions in the DNA sequence, shifting the reading frame back to its original state.

Frameshift mutations occur when nucleotides are inserted or deleted in a DNA sequence, causing a shift in the reading frame during protein synthesis. To reverse such mutations, a mutagen capable of introducing insertions or deletions in the gene's sequence would be required. One such mutagen is the chemical compound known as intercalating agents. Intercalating agents, such as acridine orange or ethidium bromide, can insert themselves between base pairs in the DNA double helix, causing the DNA to kink or bulge. During DNA replication or transcription, these bulges can lead to the addition or deletion of nucleotides, potentially restoring the reading frame to its original state.

Another mutagen that can reverse frameshift mutations is certain types of radiation, such as UV light. UV light induces the formation of thymine dimers, where adjacent thymine bases in the DNA strand become covalently linked. During DNA replication or repair processes, these thymine dimers can cause the insertion or deletion of nucleotides, thereby correcting the frameshift mutation.

In summary, frameshift mutations can be reversed by using mutagens that introduce insertions or deletions in the DNA sequence. Chemical intercalating agents and certain types of radiation, such as UV light, are examples of mutagens that can potentially reverse frameshift mutations by shifting the reading frame back to its original state.

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The parasympathetic nerve that emerges from the pons is the trigeminal nerve (option b). The trigeminal nerve, also known as cranial nerve V, is a mixed cranial nerve that has both sensory and motor functions.

It emerges from the pons, which is a region in the brainstem, and has three major branches that innervate different areas of the face and head.

The trigeminal nerve primarily carries sensory information from the face, including touch, pain, and temperature sensations. It also provides motor innervation to the muscles involved in chewing (mastication).

The facial nerve (option a), another cranial nerve, originates from the pons as well, but it is not primarily a parasympathetic nerve. The facial nerve controls the muscles of facial expression and carries taste sensations from the anterior two-thirds of the tongue.

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Answer:

Plants and animals use this process to produce ATP.

Explanation:

the first one is wrong because cellular respiration occurs in almost every cell

the third one is wrong because byproduct of cellular respiration is water, not oxygen(oxygen is used in the reaction)

fourth is wrong because carbohydrates are produced by photosynthesis

second option is right because cellular respiration provides energy(ATP) for cells to use(in order to perform lots of processes)

Active transport is the pumping through a membrane against a concentration gradient of molecules or ions. It needs energy and a combination of transmembrane proteins known as a transporter.

There are two types of active transport mechanisms. Primary active transport directly moves molecules across a membrane against their gradient using a source of chemical energy, such as ATP. On the other hand, secondary active transport, also known as cotransport, leverages the electrochemical gradient created by active transport as a source of energy to move molecules against their gradient, negating the need for a chemical energy source like ATP. The transport procedure is regarded as an example of primary active transport because it utilizes ATP as an energy source.

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