Which are examples of environmental changes that can influence natural selection?
predators
predators
availability of water
availability of water
temperature
temperature
height of legs
height of legs
fur
fur
natural disaster
natural disaster
color of body
color of body
size of body
size of body
size of beak

When the six carbons in a glucose molecule as the molecules go through aerobic cellular respiration c. they are given off as carbon dioxide.

During aerobic cellular respiration, glucose undergoes a series of metabolic reactions, such as glycolysis, the citric acid cycle (also known as the Krebs cycle or TCA cycle), and the electron transport chain. These processes lead to the complete oxidation of the six carbons in glucose to carbon dioxide (CO₂).

In glycolysis, a glucose molecule is converted into two molecules of pyruvate, each containing three carbons. The pyruvate then enters the mitochondria, where it undergoes further oxidation in the citric acid cycle. In this cycle, the carbons in pyruvate are released as carbon dioxide molecules, generating energy-rich compounds such as NADH and FADH₂.

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Answer:

b

Explanation:

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Answer:

it seems maybe you didnt turn in an assignment or late ?

Explanation:

Answer:

ahhh it'll be ok *pats back* trust me ;D

Explanation:

Answer:

Because they are more complex therefore they need more specalized cells.

Explanation:

Answer:

Explanation:

"Complex organisms need specialized cells because they are capable of performing more tasks than simple organisms."

Okay bud. have a nice day B)

It is transformed into fluorocitrate in cells, where it binds firmly and prevents an enzyme necessary for cellular respiration, leading to citrate accumulation. Aconitase enzyme and fluorocitrate bind.

The primary pathway for the synthesis of energy features the enzyme aconitase. Citrate is changed into isocitrate as part of the citric acid cycle. Citrate-to-isocitrate conversion is carried out by the citric acid cycle enzyme mitochondrial aconitase. Similar action is taken by an isoform in the cytoplasm. Several TCA cycle intermediates are also biosynthetic precursors of amino acids and heme, in addition to being used as energy sources when carbohydrates are broken down. Additionally, mAcn performs a second crucial function in the upkeep of mitochondrial DNA (mtDNA). In the tricarboxylic acid cycle, aconitase is an enzyme that catalyzes the non-redox-active stereo-specific isomerization of citrate to isocitrate via cis-aconitate. Proteins are made up of amino acids that are connected by one or more polypeptide chains to form enzymes.

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Answer:

All have carbon-nitrogen except carbohydrate

The biomolecules that do not have any carbon-nitrogen bond are proteins, peptides, and nucleic acids. The correct options are b, c, and d.

Biomolecules are organic molecules composed of carbohydrates, protein, lipids, and nucleic acids.

They are necessary for living cells to survive. Some valuable biomolecules have high demand that cannot be met by renewable resources.

Biomolecules are organic compounds that are required for life to exist. These molecules serve important functions such as a source of energy, materials for constructing new body mass such as muscles, and other molecules that serve important functions such as hemoglobin, which transports oxygen in the blood.

Proteins, peptides, and nucleic acids are examples of biomolecules that lack a carbon-nitrogen bond.

Thus, the correct options are b, c, and d.

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B). Chemical messengers derived from cholesterol fall under the category of steroid messengers. Chemical messengers or hormones are involved in the regulation of various body processes.

Chemical messengers derived from cholesterol are steroid messengers. Steroid messengers include hormones such as testosterone, estrogen, and progesterone. These hormones are involved in the regulation of reproductive functions, among other things.Chemical messengers derived from arachidonic acid are eicosanoid messengers. Hormones like prostaglandins and leukotrienes fall under this category.

Peptide/protein messengers are another class of chemical messengers. Hormones such as insulin, growth hormone, and thyroid hormone are examples of peptide/protein messengers. These hormones regulate various body functions such as metabolism, growth, and development. The following table summarizes the different classes of chemical messengers: Hormone Type Examples Steroid messengers Testosterone, estrogen, progesterone Eicosanoid messengers Prostaglandins, leukotrienes Peptide/protein messengers Insulin, growth hormone, thyroid hormone, oxytocin, cortisol, ACTH, etc.

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Answer:

True

Explanation:

By the process of diffusion, oxygen is driven by a gradient and crosses into the blood, taken up by the hemoglobin (in the red blood cells), and then transported by circulation to the the rest of the cells in the body.

Answer: True

Explanation:

Bb, bb and BB. A mating experiment between two heterozygous organisms that are equally hybrid for two allele traits is referred to as a dihybrid cross.

A heterozygous organism is one that possesses two distinct alleles at a certain genetic location, making it a hybrid. Only gametes with particular parental genetic combinations will result from a cross between two heterozygous parents with connected loci. Progeny with the paternal phenotype will result from the fusion of these parental gametes. An organism with a heterozygous genotype possesses both a dominant and a recessive allele. This genotype's designation in our case is Bb. Finally, homozygous recessive refers to an organism's genotype that consists of two recessive alleles.

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When it comes to medical ventilation, positive displacement air compressors are the preferred choice because they offer a continuous flow of compressed air.

Dynamoc compressors, on the other hand, produce compressed air in pulses, which can be problematic for medical equipment. An air compressor is a device that compresses air and converts it into potential energy stored in compressed air. They are used to power various pneumatic tools, from airbrushes to jackhammers. They can be used for a wide range of applications, including powering tools and providing ventilation in hospitals. In medical settings, air compressors are used to power ventilators, oxygen concentrators, and other life-saving equipment.

Air compressors that are specifically designed for medical use must meet strict safety and quality standards, including ISO 13485:2003 and the EU Medical Device Directive. A positive displacement air compressor works by trapping air in a chamber and reducing the volume of that chamber. This causes the pressure of the air to increase, which is then released through an outlet. Because the flow of compressed air is continuous, positive displacement compressors are the preferred choice for medical ventilation.

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Answer:

Each of the 20 amino acids has a specific side chain, known as an R group, that is also attached to the α carbon. The R groups have a variety of shapes, sizes, charges, and reactivities. This allows amino acids to be grouped according to the chemical properties of their side chains.

Answer:

A

Explanation:

Answer:

Mika is right because respiration happens during the d at and the night. and photosynthesis happens only when there is sunlight.

The best conclusion you can make about the life cycle of this cell is that the cell is in the S phase of interphase and will move next to the G2 phase.

S phase (Synthesis Phase) is the phase of the cell cycle in which all of the chromosomes (DNA) are replicated within the nucleus. During this phase, the DNA is effectively doubled as each chromosome contains two sister chromatids. After the S phase, the cell enters the G2 phase where various proteins (such as microtubules) are synthesized.

What kind of organisms existed in the past?

How did organisms move about? are some testable questions hat could be used to further investigate the topic of using the fossil record to identify changes in life on earth.

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Answer:

Morality and Emigration

Explanation:

Mortality and emigration decrease the population. Thus, the size of any population is the result of the relationships among these rates. Natality, mortality, immigration, and emigration rates apply to every population, including the human population. The sum of these rates makes up the growth rate of a population.

Answer: b

Explanation:

Answer: B.

Explanation: Light cannot pass through an opaque object.

Answer:

Question 1~ "particles that make up matter have kinetic energy" & "particles that make up matter are always in motion".

Question 2~ a- liquid

b- solid

c-gas

hope this helps!!!

Answer:

B. False

Explanation:

this is the answer for only first page.

homologous, diploid,gametes,haploid

the same thing as what the other person said.

di=2

hap=1

remember that for diploid and haploid

Answer:

DNA has thymine as one of the two pyrimidines while mRNA has uracil as its pyrimidines base. DNA is present in the nucleus while mRNA diffuses into the cytoplasm after synthesis. DNA is double-stranded while mRNA is single-stranded. mRNA is short-lived while DNA has a long lifespan.

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Answer:

The bacterial flora in the intestines are essential to homeostasis in the body, they not only break down food so the nutrients can be absorbed, they produce vitamins like biotin and vitamin K and guard against harmful bacteria that enter the system. While your heart is a vital organ, the brain (and the nervous system that attaches to the brain) make up the most critical organ system in the human body. The digestive system ordinarily gets 20% to 25% of the oxygenated blood pumped out by the heart and the receptors in muscles provide the brain with information about body position and movement, the brain controls the contraction of skeletal muscle the nervous system regulates the speed at which food moves through the digestive tract.

Answer:

Quedan 7.317 kilogramos de oxígeno en el balón y se extraen 4.683 kilogramos de oxígeno en el proceso.

Explanation:

Asúmase que el balón es rígido. Supongamos que el oxígeno se comporta como un gas ideal, entonces la ecuación de estado es la siguiente:

\(P\cdot V = \frac{m\cdot R_{u}\cdot T}{M}\) (1)

Donde:

\(P\) - Presión, medida en atmósferas.

\(V\) - Volumen, medido en litros.

\(m\) - Masa, medida en kilogramos.

\(M\) - Masa molar, medida en kilogramos por kilomol.

\(T\) - Temperatura, medida en Kelvin.

\(R_{u}\) - Constante de los gases ideales, medida en atmósfera-litros por kilomol-Kelvin.

El aire experimenta un proceso isocórico e isotérmico, entonces obtenemos la siguiente relación:

\(\frac{P_{1}}{m_{1}} = \frac{P_{2}}{m_{2}}\) (2)

Nótese que los subíndices 1 y 2 representan los estados inicial y final de proceso.

Si sabemos que \(P_{1} = 41\,atm\), \(m_{1} = 12\,kg\) y \(P_{2} = 25\,atm\), entonces la masa final del aire es:

\(m_{2} = \frac{P_{2}}{P_{1}} \cdot m_{1}\)

\(m_{2} = \left(\frac{25\,atm}{41\,atm}\right)\cdot (12\,kg)\)

\(m_{2} = 7.317\,kg\)

La masa que se ha extraído del balón es:

\(\Delta m = m_{1}-m_{2}\)

\(\Delta m = 12\,kg-7.317\,kg\)

\(\Delta m = 4.683\,kg\)

Quedan 7.317 kilogramos de oxígeno en el balón y se extraen 4.683 kilogramos de oxígeno en el proceso.

The sticky material between cells of areolar connective tissue is called the ground substance, which corresponds to option B.

The ground substance is an amorphous, gel-like substance that fills the spaces between cells and fibers in connective tissue.

The ground substance consists of a combination of water, glycosaminoglycans (GAGs), proteoglycans, and glycoproteins.

This mixture gives the ground substance its viscous and adhesive properties, allowing it to act as a medium for nutrient and waste exchange, as well as providing support and hydration to the cells within the tissue.

Glycosaminoglycans (GAGs) are long, linear chains of repeating disaccharide units. They are highly negatively charged due to the presence of sulfate or carboxyl groups, which contributes to the gel-like consistency of the ground substance.

Proteoglycans are large molecules made up of GAGs attached to a protein core, while glycoproteins are proteins with attached carbohydrate chains.

The ground substance also plays a crucial role in facilitating cell migration during tissue repair and inflammation. It provides a pathway for cells to move through the connective tissue matrix.

Areolar connective tissue is a loose connective tissue found throughout the body, surrounding and supporting various organs and structures. It is characterized by its high cellularity and abundant ground substance.

Areolar connective tissue contains a variety of cell types, including fibroblasts, immune cells, and adipocytes.

In summary, the sticky material between cells of areolar connective tissue is called the ground substance. It is a gel-like substance composed of water, glycosaminoglycans, proteoglycans, and glycoproteins.

The ground substance fills the spaces between cells and fibers, providing hydration, support, and facilitating cell movement within the connective tissue.

So, option B is correct.

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Answer:

substitution

Explanation:

as it is changed T base with the C base read your description of substitution it is good as well :)

The peritectic transformation occurs in Fe-C alloys at a temperature of about 1148°C and at about 0.17 wt.% C. Delta-ferrite is not expected to be retained on equilibrium cooling steel of this composition through the invariant reaction because when the steel is cooled slowly, all delta-ferrite will transform into austenite at a temperature range of 1400-912°C, and the remaining austenite will then transform into pearlite at a temperature range of 727-427°C. Delta-ferrite cannot exist in equilibrium in iron-carbon alloys containing less than 0.09% C at room temperature.

b) If a Fe-0.4 wt% C steel is austenitised at 1000°C for 30 minutes and is slow-cooled to room temperature, eutectoid alpha-iron, pro-eutectoid alpha-iron and cementite will form. When instead a Fe-1.3 wt% C steel is austenitised at 1000°C for 30 minutes and is slow-cooled to room temperature, alpha-iron, eutectoid cementite and pro-eutectoid cementite will form.

c) When using the equilibrium phase diagram together with the lever rule to describe as quantitatively as possible the key difference in terms of phases, phase fractions and microstructure between these alloys, it can be observed that Fe-0.4 wt% C steel consists of about 98% pearlite and 2% proeutectoid ferrite while Fe-1.3 wt% C steel contains about 60% cementite, 20% proeutectoid cementite and 20% pearlite. The Fe-0.4 wt% C steel is composed of a fine network of pearlite while the Fe-1.3 wt% C steel is made up of coarse cementite and pearlite in a lamellar form with the ferrite and cementite phases separating into separate regions during cooling.

d) If the steel described in (b) is quenched rapidly from 1000°C to room temperature, martensite will be formed which will consist of a supersaturated body-centred cubic (BCC) lattice of carbon in iron. This is different from that formed in any of the cases above because martensite is formed when austenite is rapidly cooled, the carbon atoms do not have sufficient time to diffuse to form either ferrite or cementite.

e) The d-spacing to two decimal places for Peaks 1 and 2, the first two peaks present in the scanned region for Phase 1 can be calculated using Bragg's law, which is nλ = 2d sin θ. For Peak 1, d = nλ / 2 sin θ = (1 × 0.15406) / (2 × sin 28) = 0.270 nm, and for Peak 2, d = nλ / 2 sin θ = (1 × 0.15406) / (2 × sin 43.83) = 0.219 nm.

The (002) and (202) peaks are not immediately apparent in the XRD plot and table due to their weak intensities and their positions overlapping with the peaks of Phase 2.

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