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14.meiosis
15. Heredity
16. 6 chromosomes. One chromosome from each pair ends up in one gamete.
17. DNA must undergo replication.
18. The sex cells end up with only two chromosomes each, half the number found in the parent cell. Each sex cell has one chromosomes from each original pair.
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Related Questions
A client at 38 weeks of gestation is admitted to labor and delivery for the management of preeclampsia and is placed on a magnesium sulfate iv drip. explain the signs of magnesium toxicity for which the nurse should monitor.
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Explain the mechanisms for movement of materials across cellular membranes anatomy
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1. Passive Transport Mechanisms which is the movement of materials that does not require energy. Instead the movement relies on the permeability of the cell. Under this are three kinds of passive transport mechanisms:
a. Simple Diffusion:
- the movement of materials from a region of higher concentration to lower concentration. No external energy is necessary for the movement. The materials supply the energy themselves.
b. Facilitated Diffusion:
- This differs from simple diffusion because the movement is facilitated by proteins that make up the structure of the membrane. The proteins include channel proteins that allow ions and smaller molecules to cross the membrane. The other protein are the carrier proteins, which bind to materials like sugar molecules and move it across the membrane.
c. Osmosis:
- This is the diffusion of water across the membrane. Osmosis moves water from regions where there are more water molecules of water per volume to regions where there are less water molecules per volume.
2. Active transport on the other hand is a movement mechanism that requires energy. It uses the energy to send materials against the direction it is coming from through simple diffusion. This mechanism is used in a way to keep unwanted ions or other materials out of the cell.
Cells use mechanisms like active transport, passive diffusion, facilitated diffusion, co-transport, and endocytosis to move materials across their membranes, some requiring ATP and others happening passively supporting cellular function.
Mechanisms for Movement of Materials Across Cellular Membranes
Cells transport materials across their membranes using several mechanisms, each playing a crucial role in the maintenance of cellular function. The selective permeability of the plasma membrane allows for different methods of transport, some requiring energy and others occurring passively.
Active transport is a process where cells use ATP to move substances against their concentration gradient. Passive diffusion is the movement of substances from a region of higher to lower concentration without energy use. Facilitated diffusion involves carrier proteins to help substances move down their concentration gradient. Co-transport, or secondary active transport, uses the movement of one molecule to drive the transport of another. Lastly, endocytosis is a form of active transport where the cell membrane engulfs material to bring it into the cell.
These mechanisms ensure that essential nutrients, ions, and other substances can be absorbed, while waste products are secreted or removed, maintaining the necessary conditions for cellular survival and function.
what is the adaptive advantage of a bony fish's segmented backbone
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bony fish's segmented backbone is that it assists in leverage and their bone produces red blood cells at the same time. It also gives the fish's structure and protection.
Final answer:
The segmented backbone of bony fish provides flexibility and support for efficient swimming and maneuvering. It allows the fish to navigate through water, avoid predators, and capture prey.
Explanation:
The adaptation advantage of a bony fish's segmented backbone is that it provides flexibility and support for efficient swimming and maneuvering. The segmentation allows for individual movement of each vertebra, enabling the fish to bend and twist its body. This is important for navigating through water, avoiding predators, and capturing prey.
For example, when a bony fish wants to change direction quickly, it can flex its body to one side, causing the tail to bend in the opposite direction, propelling the fish forward with a strong burst of speed. The ability to rapidly change direction and swim gracefully allows bony fish to effectively navigate their underwater environment and capture food.
The most frequent way in which small regulatory rna molecules exert their effects is by the most frequent way in which small regulatory rna molecules exert their effects is by binding to a repressor and repressing enzyme transcription. signal transduction. base pairing with other rna molecules that have regions of complementary sequence. acting as an inducer that then binds to an activator protein to allow transcription to proceed.
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I hope my answer helped you. Have a nice day!
The nurse is caring for a client with a hiatal hernia. the client states that favorite beverages include ginger ale, apple juice, orange juice, and cola beverages. of the four the client listed, which is the only beverage that should remain in the client's diet?
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Among the choices, apple juice is not acid-producing. Anything acidic can worsen the symptoms of a hiatal hernia. Citrus foods and drinks should be avoided, this means orange juice is out of the question. Carbonated drinks like colas and ginger ale are also not advisable because they can cause stomach bloating. Although ginger is known to reduce acid production in the stomach, most commercial ginger ales contain a lot of sugar and are carbonated.
Answer: Apple juice.
Explanation: Apple juice is best for hietal hernia as it does not causes irritation in the mucosa.
Carbonated beverages, such as ginger ale causes regurgitation. The acidity level of the orange juice very high and will enhance the disorder.
Most of the soft drinks and colas increases the acidity of the increases the disorder. Soda drinks are carbonated and increases the chances of regurgitation.
Which type of immunity defends against any type of invader?
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Answer : Nonspecific
Which of the following colors would indicate the coolest star
Red
Blue
Orange
Yellow
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Answer:
Key concepts and summary. Stars have different colors, which are indicators of temperature. The hottest stars tend to appear blue or blue-white, whereas the coolest stars are red.
Explanation:
coolest stars are red
Stimuli alter the activity of excitable sensory cells and generate action potentials via _____.
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Compare and contrast signs and symptoms of emphysema and chronic bronchitis
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bronchitis is inflammation of lung bronchules, unproductive cough, with lung pain..requires antibiotics..
Which of the following is not evidence for the law of conservation of mass during cellular respiration?
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Answer is: cellular respiration creates an energy molecule when glucose is broken down.
Conservation of mass (mass is never lost or gained in chemical reactions), during chemical reaction no particles are created or
destroyed, the atoms are simply rearranged from the reactants to the
products.
In the combined processes of glycolysis and cellular respiration, what is consumed and what is produced? see concept 9.1 (page 165)
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The diagram below represents a human organ system the major function of the system is to:
1. Provide immunity essential for survival of each individual in a population.
2. Provide cells that are necessary for the survival of the species.
3. Produce chemical messages are necessary for nerve cell development.
4. Control the passage into and out of a developing fetus.
Please choose the answer for me please. I need help with that question and explain why it is the answer please so I can understand.
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Here is your answer:
The proper answer to this question is option B "Provide cells that are necessary for the survival of the species". Without feels your body cannot survive.
Your answer is B.
If you need anymore help feel free to ask me!
Hope this helps!
The natural tendency of molecules to move from higher to lower concentrations is?
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The answer is "diffusion".
Hope this helps!
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Diffusion Is the answer
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In cattle, a single gene with two alleles determines fur color. The fur can be red, white, or roan. Roan fur has both red and white hair. Which of the following is true about alleles for fur color in cattle?
The allele for roan fur color is dominant over red and white fur color.
The allele for red fur color is dominant over white and roan fur color.
The roan and white alleles are expressed independently of the other.
The red and white alleles are expressed independently of the other.
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Final answer:
The answer states that the red and white alleles for fur color in cattle are expressed independently of each other, which is an example of codominance resulting in the roan phenotype.
Explanation:
The question is about the inheritance of fur color in cattle, which is determined by a single gene with two alleles. The correct answer to which of the statements is true about alleles for fur color in cattle is that 'the red and white alleles are expressed independently of the other'. This concept is known as codominance, where both alleles contribute to the phenotype. In the case of roan cattle, the presence of both red and white fur is due to the expression of both the red and white alleles independently, leading to patches of both colors in the fur.
The correct option is B i.e. The allele for red fur color is dominant over white and roan fur color.
In cattle, fur color is determined by a single gene with two alleles: red (R) and white (R'). The fur can be red, white, or roan. Roan fur, which exhibits both red and white hairs, occurs in heterozygous cattle with the genotype RR'. This example illustrates codominance, where neither allele is completely dominant or recessive, and both traits are expressed simultaneously in the offspring.The statement "The red and white alleles are expressed independently of the other" is correct. This demonstrates that roan and white fur colors are codominantly expressed when both alleles are present, as seen in roan cattle with both red and white hairs.What is an antigen and antibody? and what are their difference(s)?
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Antibodies are also known as immunoglobulins and these proteins are created by the body. They work to fight against the antigens.
Antigens are typically divided into self and non-self-antigens. Self-antigens, like cancer cells, form within the body. Non-self-antigens come from outside the body. They stimulate your immune system to produce more antibodies, exemplifying the difference between antigen and antibody.
There are a total of 5 types of antibodies, each of which is different. They are IgA, IgE, IgG, IgM, and IgD.
IgA protects the surfaces of the body which receive exposure to foreign, outside substances.
IgE causes a reaction in the body against foreign substances, including animal dander, pollen, and fungus spores. These antibodies are part of allergic reactions to some poisons and certain medications. Those with allergies tend to have high quantities of this type of antibody.
IgG plays a key role in fighting infections of a bacterial or viral nature. These are the only antibodies that are able to cross the placenta of a pregnant woman, offering protection to the fetus while still in utero.
When an infection occurs, IgM antibodies are the very first type of antibodies to be made as a response. They will lead to other cells in the immune system destroying foreign substances.
Experts are still unclear as to what exactly IgD antibodies d
The triangular depression in the medial surface of each lung, where blood vessels and the primary bronchi enter, is the:
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Is examination of the back an organ or body area examimnation?
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Hope this helpss
The definition of mutation is "any heritable change in the genetic material." the qualifier "heritable" is necessary because: most changes in the genetic material are repaired soon after they occur. changes in the genetic material occur at random along the genome. changes in the genetic material occur without regard to the needs of the organism. most changes in the genetic material are harmful to the organism.
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The animal phylum most like the protists that gave rise to the animal kingdom is _____. see concept 33.1 (page 688)
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Answer: Porifera
The animal phylum porifera constitute the sponges that is most like the protists that gave rise to animal kingdom. One evidence is that they have been defined as multi-celled immobile animals or metazoans that have water intake and outlet openings, which is connected by chambers lined with choanocytes or cells with whip-like flagella. Another evidence that supports this includes the lack of true tissue in sponges.
What has occurred when a solid forms out of the mixing of two liquids in a chemical reaction?
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This also means that at least one of the products does not dissolve in solution
Explain the process of radiometric (radioactive dating) in your own words.
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1. What do bone marrow and the epidermis have in common? (1 point)
They are both sites of new cell formation.
They both contain structures that assist the body in cooling down if overheating
occurs.
They both contain or are associated with sensory neurons.
They are both involved in waste disposal functions.,
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Answer:
The correct answer would be They are both sites of new cell formation.
Bone marrow is the semi-solid tissue found in the cavities of the bone.
It serves as the site of production of blood cells.
Epidermis refers to the outermost layer of the skin. Stratum basale layer of the epidermis acts as the site of production of new epidermal skin cells.
socialization only happens within the family?
true
false
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The somatic nervous system contains nerves that control: skeletal muscles internal organs glands cardiac muscles
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Out of the following choices;
A) skeletal muscles
B) internal organs, joints, and glands
C) skeletal muscles, skin, and glands
D) smooth muscles, cardiac muscles, and glands
The answer is A. This is because of the somatic nervous system control voluntary mechanisms of the body. The alternative is the autonomic nervous system that controls the involuntary mechanisms. The somatic nervous system comprises of the afferent neurons and efferent neurons.
The somatic nervous system (SNS) or also known as the voluntary nervous system, controls the movement of voluntary muscles. The process of this movement is called reflex arc and this occurs in the skeletal muscles.
When we say voluntary movement, the body moves according to how you want to move it and the system responsible for this is the SNS. In contrast, involuntary movement is the movement that you cannot consciously control like the beating of the heart, breathing and digestive processes.
14. Which of the following happens when ice melts?
A. Energy flows from the ice to its surroundings
B. Water molecules move from their fixed position.
C. Water molecules lose energy
D. The temperature of the ice increases as it melts
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What is the density of a mineral with a mass of 41.2 g and a volume of 8.2 cm3? 49.4 g/cm3 5.02 g/cm3 0.19 g/cm3 337.8 g/cm3
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Answer:
Density of the mineral is equal to [tex]5.02 \frac{g}{cm^{3} }[/tex]
Explanation:
The density of a substance is equal to mass of the substance divided by its volume.
Thus, the formula of density (d) is as follows
[tex]d = \frac{M}{V}[/tex]
Where, M represent the mass of a substance
and V represents the volume of the same substance
Substituting the given values in above equation, we get -
[tex]d = \frac{41.2}{8.2} \frac{g}{cm^{3} } \\d = 5.02 \frac{g}{cm^{3} } \\[/tex]
Hence, option B is correct
A fossil skeleton with a basin-shaped pelvis, a central foramen magnum, and arched feet would most likely be classified as a(n) __________.
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Answer:
These characteristics are observed in biped organisms
Explanation:
A biped organism is able to use two legs for walking. Bipedalism is an evolutionary adaptation produced by several skeletal changes shared in all bipedal species. The central foramen magnum, a short wide pelvis, and arched feet are factors that influence bipedalism, these features are required to achieve a better balance during the bipedal movement
Two albino individuals marry and start a family. their first child has normal pigmentation. does this indicate infidelity and why/why not?
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Having a child with normal pigmentation from two albino parents does not definitively indicate infidelity, as genetic mutations or other genetic phenomena like uniparental disomy may occur. Albinism is a recessive trait, but other genetic factors such as epistasis could also influence pigmentation.
The question concerns whether the presence of normal pigmentation in the child of two albino parents can indicate infidelity. To address this, we need to understand the genetics of albinism, which is a condition marked by the absence of pigment in the skin, hair, and eyes due to a lack of melanin production, and is typically inherited in an autosomal recessive pattern.
Albinism is caused by recessive alleles, and if two individuals with albinism (who would likely be homozygous recessive) have a child, the expectation is that the child would also exhibit albinism. However, this does not categorically exclude the possibility of the child having normal pigmentation due to genetic mutation or uniparental disomy, where both copies of a chromosome are inherited from one parent. It should also be noted that epistasis can influence the expression of pigment, where the expression of one gene is affected by one or more other genes.
When changing the soiled bed linens of a client with a wound that is draining seropurulent material, what personal protective equipment (ppe) is most essential for the nurse to wear?
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The essential PPE for changing soiled bed linens of a client with a draining wound includes gloves, a gown, and a face shield or mask with goggles. These items protect the healthcare worker from infection and contamination. Following proper PPE protocols is vital for safety and health.
When changing the soiled bed linens of a client with a wound that is draining seropurulent material, it is essential for the nurse to wear appropriate personal protective equipment (PPE) to prevent infection and contamination. The most essential PPE includes:
Gloves: To protect the hands from coming into contact with the infectious material.Gown: To protect the clothing and skin from contamination.Face shield or mask with goggles: To protect the eyes, nose, and mouth from splashes of infected material.Following proper PPE protocols ensures the safety and health of medical personnel and prevents the spread of infection.
In order to grow more of a certain type of cell, a scientist should:
a.design a model of that type of cell.
b.observe the cell with a light microscope.
c.expose the cell to an electron microscope.
d.prepare a culture of that type of cell.