Que es la Mitosis y la Meiosis ?

Answer:

a tundra :)

have a nice day !

Explanation:

Answer:

a tundra :}

Explanation:

Answer:

a

Explanation:

it can tell us how long life existed on Earth and how different plants and animals are related to each other

The arterial PO₂ in a person with anemia will be lower than the arterial PO₂ in a person with a normal hemoglobin concentration.

This is because anemia is a condition in which the number of red blood cells and/or the amount of hemoglobin in the blood is lower than normal. As hemoglobin is a protein responsible for carrying oxygen through the body, having fewer red blood cells and/or less hemoglobin means that less oxygen is transported throughout the body.

Having less oxygen in the blood leads to a decreased arterial PO₂. When the arterial PO₂ is lower the body is not receiving the necessary oxygen to function properly, leading to the common symptoms of anemia such as fatigue, shortness of breath, and lightheadedness.

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Answer:

C

Explanation:

if its a mental disorder i think it would be a disability of the mind

Answer:

    Explanation:

Answer: 9 and 6

Explanation:

6−1x0+

2

2

=6+−1+1

Combine Like Terms:

=6+−1+1

=(6+−1+1)

=6

Meiosis halves the chromosome number, whereas mitosis maintains the same chromosome number- True.

Meiosis is a kind of cell division that generates daughter cells, each of which has half as many chromosomes as the parent cell. Reproductive cells divide through a process called meiosis to create gametes and sex cells.

Meiosis is divided into two phases, I and II. In order to guarantee that the creature produced following fertilisation of both male and female gametes has the proper set of chromosomes, the number of chromosomes in gametes is reduced by half. For instance, a diploid creature creates haploid gametes, which when they combine, create another diploid organism.

Another cell division process that yields identical daughter cells is mitosis. Insofar as they have the same number of chromosomes as the parent cell that underwent cell division, they are identical. For instance, a diploid cell goes through mitosis to create two daughter cells that are diploid.

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Answer:

B. no renobables

Explanation:

Se illamam

Answer:

the correct answer is b.

A water molecule can bond to up to four other water molecules by hydrogen bonds.

Hydrogen is the lightest and most abundant element in the universe, constituting about 75% of its elemental mass. It is a highly reactive gas that combines with oxygen to form water. Hydrogen has numerous applications, including fuel for vehicles, energy storage, and industrial processes. It is also used in the production of ammonia, methanol, and various chemicals. Additionally, hydrogen has gained attention as a potential clean and sustainable energy source, as it can be produced from renewable sources and used in fuel cells to generate electricity with only water as a byproduct.

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Given data: Adult dosage of a substance is 280mg. Rule for calculating dosage for children between 1 to 12 years of age is given by the function, D(t) = a * t / t + 12. To find the rate of change of this function with respect to the child's age, we need to differentiate the function with respect to t.

Let's differentiate this function with respect to t. d/dt [ D(t) ]= d/dt [ a * t / t + 12 ]

Using quotient rule,= [ a * (t + 12) - a * t ] / ( t + 12 )²= a / ( t + 12 )²

Thus, the rate of change of child's dosage with respect to child's age is given by D'(t) = a / ( t + 12 )².

Hence, the required expression is D'(t) = 280 / ( t + 12 )².

Now, substituting t = 3,

we get, D'(3) = 280 / (3 + 12)²

= 280 / 225

= 1.244 mg/year

Substituting t = 12,

we get, D'(12) = 280 / (12 + 12)²

= 280 / 576

= 0.486 mg/year

Therefore, the rate of change of a child's dosage with respect to his or her age for a 3-yr-old child is 1.244 mg/year and for a 12-yr-old child is 0.486 mg/year. We are given the formula, D(t) = a * t / t + 12, which represents the dosage for a child as a function of their age, t. To find the rate of change of this function with respect to the child's age, we need to differentiate the function with respect to t.

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D) Formula for a stable, binary compound formed between Mg+2 and S-2 will be MgS .

It will take one -2 sulfide ion to balance one +2 magnesium ion to form a magnesium sulfide.

Magnesium sulphide, abbreviated MgS, is an inorganic compound. It is a white crystalline material, but it is frequently encountered in impure form as a brown, non-crystalline powder. It is produced industrially during the manufacturing of metallic iron.Sulfur is the first element removed in the BOS steelmaking process. Sulfur is removed from impure blast furnace iron using a lance and several hundred kilogrammes of magnesium powder. Magnesium sulphide is formed and floats on the molten iron, where it is removed.

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The term "interdependence of ecosystems" describes how many living things and their physical surroundings depend on one another in order to survive. Living things engage in complicated interactions with one another and their physical surroundings in an ecosystem.

Interdependence in ecology refers to the idea that species populations within an ecosystem depend on one another. The populations of other species in the same ecosystem will alter if the population of one species increases or decreases.

For instance, many animals depend on plants for shelter or for nesting, and both plant and animal life depend on abiotic elements like water, nutrients, light, and optimum temperatures. Herbivorous animals also depend on plants for nourishment.

Provide examples of each of the three types of interdependence that exist among living things. A bird eating from an alligator's teeth is an example of mutualism. An orchid that is living commensally in a tree limb A mosquito biting your arm is parasitism.

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ATP-mediated vasodilation refers to the process by which ATP (adenosine triphosphate) causes blood vessels to widen or dilate. This dilation helps to increase blood flow to the tissues and organs in the body.

In humans, ATP-mediated vasodilation occurs through the activation of inwardly-rectifying potassium channels. These channels are present in the smooth muscle cells that line the walls of blood vessels. When these channels are activated by ATP, they allow potassium ions to flow out of the smooth muscle cells, leading to a decrease in intracellular potassium concentration. The decrease in intracellular potassium concentration causes the smooth muscle cells to hyperpolarize. Hyperpolarization refers to a change in the electrical potential across the cell membrane, making it more negative than the resting membrane potential. This hyperpolarization leads to the closure of voltage-gated calcium channels in the smooth muscle cells.

Overall, ATP-mediated vasodilation occurs through the activation of inwardly-rectifying potassium channels in smooth muscle cells. This activation leads to hyperpolarization and the closure of calcium channels, ultimately resulting in vasodilation and increased blood flow to the tissues and organs.

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C14 is an isotope used in radiocarbon dating techniques to date organic matter remains. The age of these bones is approximately 6890 years.

Carbon 14, also known as radiocarbon, is a radioactive carbon isotope.

Isotopes are the atoms of the same element -carbon- that vary in neutrons and, hence, in their massic number. They are alternative forms of the same element.

The radioactive C14 nucleus contains 6 protons and 8 neutrons and has a half-life of 5730 years.

The term half-life is a reference. It means that an organism that has been dead for 5730 years has half the C14 amount or concentration than the same organism had when it was alive.

Knowing the half-life of an element is useful to determine the age of the dead matter.

C14 is used in radiocarbon dating techniques or methods to estimate the age of fossils. This is a reliable technique used for dating organic samples that are less than 50,000 years old.

Available data:

To answer this question we can make use of the following equation

Ln (C14T₁/C14 T₀) = - λ T₁

Where,

Let us first calculate the radioactive decay constant.

λ = (Ln2)/T₀,₅

λ = 0.693/5730

λ = 0.0001209

Now, let us calculate the first term in the equation

Ln (C14T₁/C14 T₀) = Ln (0.1/0.23) = Ln 0.4347 = - 0.833

Finally, let us replace the terms, clear the equation, and calculate the value of T₁.

Ln (C14T₁/C14 T₀) = - λ T₁

- 0.833 = - 0.0001209 x T₁

T₁ = - 0.833 / - 0.0001209

T₁ =  6889.99 ≅ 6890 years

The bones are approximately 6890 years.

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Answer:

What is the maiming of that I can't answer because I don't understand

Research on point-light walker displays has revealed that when it comes to perceiving biological motion, humans are better able to identify other humans than animals according to several studies .

Point-light walker displays involve representing the motion of a human or animal through a series of dots placed at key points on the body.

Studies have shown that humans are able to perceive biological motion in point-light walker displays with incredible accuracy.

However, when presented with point-light walker displays of animals, humans struggle to identify the motion as biological in nature.

This suggests that humans have a unique ability to identify the biological motion of their own species but struggle when it comes to identifying the motion of other species.

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Answer:

tissue level

Explanation:

"Tissue — a group of cells with similar structure and function. There are only four types of tissues : Epithelial. Connective."

The form of the pelvic bones provides the best evidence regarding the person's sex. Abnormal changes in bone structure, size, and density might be indicative of disease or trauma.

The human skeleton is the body's internal framework. It is made up of approximately 270 bones at birth, which lowers to approximately 206 bones by adulthood as some bones fuse together.

The primary roles of the bones include body support, mobility facilitation, organ protection, mineral and fat storage, and hematopoiesis. The musculoskeletal system is the combination of the muscular and skeletal systems.

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The above statement is false because swimming in Iguazu Falls is allowed under certain circumstances.

The given statement "swimming in Iguazu Falls is not allowed under any circumstances" is not universally true. The rules and regulations regarding swimming in Iguazu Falls can vary depending on the specific circumstances and policies in place at the time. While it is generally advised against due to safety concerns and the powerful currents of the falls, there may be certain controlled or supervised situations where swimming is allowed, such as organized tours or specific designated areas with appropriate safety measures in place.

However, it is important to note that swimming in Iguazu Falls can be extremely dangerous and is typically discouraged to prevent accidents, injuries, or fatalities. It is always crucial to follow any posted signs, instructions from authorities, and to prioritize personal safety when visiting natural landmarks like Iguazu Falls.

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Photosynthesis and Cellular respiration, both cellular processes are important for life, however, we need to understand what happens to confirm this information....

Most life on Earth depends on photosynthesis. The process is carried out by plants, algae, and some types of bacteria, which capture energy from sunlight to produce oxygen (O2) and chemical energy stored in glucose (a sugar). Herbivores then obtain this energy by eating plants, and carnivores obtain it by eating herbivores.

Inside the plant cell are small organelles called chloroplasts, which store the energy of sunlight. Within the thylakoid membranes of the chloroplast is a light-absorbing pigment called chlorophyll, which is responsible for giving the plant its green color. During photosynthesis, chlorophyll absorbs energy from blue- and red-light waves, and reflects green-light waves, making the plant appear green.

Cellular respiration, the process by which organisms combine oxygen with foodstuff molecules, diverting the chemical energy in these substances into life-sustaining activities and discarding, as waste products, carbon dioxide and water.

One objective of the degradation of foodstuffs is to convert the energy contained in chemical bonds into the energy-rich compound adenosine triphosphate (ATP), which captures the chemical energy obtained from the breakdown of food molecules and releases it to fuel other cellular processes.  

With this information, we can say that photosynthesis transforms solar energy into chemical energy through sugars. Cellular respiration releases energy from food through sugars.

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a. If you plate 0.1 ml from the 10^-6 dilution onto YEPD, 4 × 10^11 colonies/ml colonies are predicted to be seen.

b.  If you wanted to have 40 surviving colonies on the plate after the 20 sec UV exposure, 1000 cells are needed to be plated.

c. 5 × 10^-9 dilution of the culture is needed  to plate  1000 cells.

a. To calculate the predicted number of colonies when you plate 0.1 ml from the 10^-6 dilution onto YEPD, you can use the following formula:

N = (number of colonies)/(volume plated × dilution factor).

First, you need to calculate the total number of cells in the culture that were exposed to UV light:

N0 = 2 × 10^10 cells/ml × V, where,

V is the volume of the culture that was exposed to UV light.

Since we don't know the volume of the culture, we can't calculate N0 directly. However, we do know that the survival rate after the UV exposure was 20%, which means that only 20% of the cells were still alive:

N = 0.2 × N0

Now we can calculate the number of cells in the 10^-6 dilution that we plated:

N1 = 10^6 × N0 = 2 × 10^16 cells/ml.

Then we can calculate the number of surviving cells in the 10^-6 dilution that we plated:

N2 = 0.2 × N1 = 4 × 10^15 cells/ml

Finally, we can calculate the predicted number of colonies:

N = N2 × 0.1 ml/(10^-6) = 4 × 10^11 colonies/ml

b. To have 40 surviving colonies on the plate after the 20 sec UV exposure, you need to plate a number of cells that will give rise to 40/0.2 = 200 cells after the UV exposure. Let's call this number N3. We can calculate N3 as follows:

N3 = 200 cells/0.2 = 1000 cells

c. To calculate the dilution of the culture that we need to plate to get 1000 cells in 0.1 ml, we can use the following formula:

N4 = N3 × (volume plated × dilution factor) = 1000 cells

N5 = N0 × dilution factor

N6 = N5 × (volume plated × dilution factor)

     = N4N5/N6 = dilution factor 2 × 10^10 cells/ml × dilution factor × 0.1 ml

     = 1000 cells

dilution factor = 5 × 10^-9

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Answer:

It is reliable because the article is based on multiple studies done by scientists at multiple veterinary schools.

Explanation:

The information in the article can be described as reliable due to the fact that it is based on multiple studies by scientists.

When a study is carried out by different group of independent researchers and a similar result if obtained, the results becomes more or less a theory. A research that is reproducible and gives similar result can totally be relied on for information.

Answer:

Atmosphere takes place in the stratosphere and we live in troposphere

Answer: answer below ⬇

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The correct answer is a) Abdominal and c) Gluteal muscle groups are responsible for maintaining the stability of the spine and pelvis.

The muscle groups responsible for maintaining the stability of the spine and pelvis are the abdominal and gluteal muscles. The abdominal muscles, including the rectus abdominis, transverse abdominis, and obliques, play a crucial role in supporting the spine by providing stabilization and promoting proper posture. They also contribute to the movement and flexibility of the trunk, allowing for a range of motions, such as bending and twisting.

The gluteal muscles, consisting of the gluteus maximus, medius, and minimus, work together to stabilize the pelvis and support the spine during various activities, such as walking, running, and lifting. These muscles also contribute to hip movement and overall lower body strength.

In conclusion, both the abdominal and gluteal muscle groups are vital in maintaining the stability of the spine and pelvis, ensuring proper posture, and providing support during daily activities. It is essential to keep these muscles strong and flexible through regular exercise and stretching to maintain optimal spinal health and prevent injuries.

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A sister chromatid is a DNA molecule that is made up of two identical copies of the same chromosome. Chromosomes are the genetic material found in the nucleus of the cell, and sister chromatids are formed when the chromosomes replicate during cell division.

Sister chromatids are identical copies of the same chromosome, which are held together by a specialized protein structure known as a centromere. The centromere is responsible for the proper segregation of the sister chromatids during cell division. The sister chromatids are made up of two strands of DNA, which are connected to each other by a protein called a histone. Each strand is held together by hydrogen bonds, which are formed between the base pairs of the DNA.

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If the size of a cell increases it will be more difficult (all other things being equal) for diffusion to transport materials out of the cell. Therefore, less of the cell's interior will be able to come in contact with the cell's surface. If less of it comes in contact, less of it can cross the cell membrane.

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