what is required for natural selection to occur? i. acquired characteristics ii. advantageous characteristics iii. genetic variation

Under normal resting conditions, as blood circulates through systemic circulation, it gives up approximately 25% of the oxygen it is carrying.

This oxygen is released from red blood cells and diffuses into the surrounding tissues to support cellular respiration and provide oxygen for metabolic processes. The remaining oxygen is carried back to the lungs by the venous circulation to be reoxygenated and continue the cycle. During systemic circulation, oxygen-rich blood from the left side of the heart is pumped into the aorta, which branches into smaller arteries and arterioles that supply oxygenated blood to the body's tissues.

As the blood travels through the capillary networks within these tissues, oxygen diffuses from the blood into the interstitial fluid and then into the cells. This transfer of oxygen is facilitated by a concentration gradient, with higher levels of oxygen in the blood compared to the surrounding tissues.

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The bound ribosomes that are present on its surface give it a rough appearance. Protein synthesis and storage occur in rough ER. On the other side, a smooth ER aids in the retention of proteins.

How are proteins structured?

Amino acids, which are divided into several categories, make up proteins. Certain sequences of these essential amino acids exist, and the DNA regulates their configurations. As our bodies are unable to produce these necessary amino acids on their own, we need to consume a lot of protein-rich foods on a daily basis to maintain a steady rate of metabolism.

What amino acids make up a protein?

the amino acids. The monomer that constitute protein are amino acids. A protein is composed of one or so more polypeptides, which are individual linear amino acids chains. (We'll learn more about the origin of this name a little farther down the page.) Proteins can contain a variety of amino acids that are 20202020 in type.

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Answer:

just learned about this in ap bio haha

Explanation:

Wow, that's such a cool prokaryotic cell. It looks so delicious, I wonder if I can eat it.

"Hey, cell, can I eat you?"

"No, you cannot."

"Please? I would love to have your energy-making properties!"

"How would I benefit from this? It seems like you're being parasitic."

"I would help you, by giving you protection and a safe home. You would give me energy. It seems more like an endosymbiotic relationship to me!"

"Fine, you can ingest me."

I'm so glad they let me eat them, they were so yummy. I can even create energy now, and I have a powerhouse inside me! This is so cool, maybe I should eat that other cell with photosynthetic properties.

SORRY IF THIS IS TERRIBLE I REALLY TRIED  

Previously, there was a cell. Moving about the primordial soup, it was making its way through the tough environment. It abruptly came across a little prokaryotic cell.

The cell was glad to have someone to share the environment with since, to be completely honest, it was starting to feel a little lonely. The two cells began to interact often and peacefully cohabit.

The first cell began to consider how much simpler it would be to survive if the other, smaller cell moved in with me. After a brief moment of hesitation, the cell fearlessly said, The rest, as they say, is (endosymbiotic) history.

Studies on the mitochondria and chloroplasts are thought to have come from bacteria living in large cells.

Therefore, this supports the theory that eukaryotic cells developed through endosymbiotic relationships between prokaryotes.

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Answer:

because it has highest specific heat capacity

A colorblind man marries a visually normal woman who has no family history of colorblindness. Specific X chromosomal abnormalities have been associated to colour blindness.

There must be all x chromosomes for colour blindness to exist. A woman with normal eyesight who married a color-blind man has a color-blind father. They don't know if their fourth child has normal eyesight or is colour blind. Daughters of a colorblind woman who marries a guy with normal eyesight will carry the sickness, and all sons will be colorblind. This is illustrated as follows: The correct response is thus, "All sons are colour blind, daughters carry."

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Hydroponics - D

Aquaponics - B

Aquaculture - C

Permaculture - A

Answer:

a. large claw allele will increase, small claw allele will decrease

Explanation:

Looking at the graph we can see that the number of male crabs with larger claws is increasing every time while the smaller claws are decreasing.

They lie close to the ground because they don't have any roots, so by lying close to the ground they can absorb water and nutrients better.

Upon activation by stomach acidity, the secretions of the parietal cells initiate the chemical digestion of protein in the stomach.

Through receptors on the basolateral cell surfaces, parietal cell activity is controlled. Histamine receptor activation causes more secretion in the isolated gland and the isolated parietal-cell fractions than receptor stimulation with cholinergic substances or with gastrin.

The enzyme adenylyl cyclase is activated by the binding of histamine to parietal cell H2-type receptors, increasing intracellular cyclic adenosine monophosphate (cAMP) concentrations.

Gastric acid secretion is controlled by parietal cells and helps with food digestion, mineral absorption, and bacterial control.

The pH is maintained between 1.5 and 3 thanks to the parietal cells' production of hydrochloric acid. The stomach's pH will rise if the parietal cells stop working.

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Does muscle memory facilitate quicker reaction times? is a  a testable question that could be used to further investigate the topic of stimulus-response time.

Define reaction time.

Reaction time is the amount of time it takes for someone to react to a stimuli. Since it takes time for the information to travel from your hand to your brain, where it is processed, and then a response is started, there may be a brief delay between touching something that is really cold and taking your hand away.

Your arm should be extended as you hold the ruler's top. You should have your fingers on the largest measurement. Ask a buddy to hold the ruler between their fingers with their thumb and index finger placed at the bottom. Drop the ruler, then mark the distance on it where the other person's fingers are. Repeat this for every participant. Allow three tries for each person, then calculate the average.

The individual who reacts most quickly is the one who successfully catches the ruler at its lowest measurement because the sooner the ruler is caught, the less time it has had to fall. Our eyes see that the ruler has been dropped, alerting the brain, which then instructs the arm and hand muscles to grab the ruler. These messages move really swiftly because to our body's advanced intelligence.

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Answer:

a) The purpose of selective breeding is to develop livestock whose desirable traits have strong heritable components and can therefore be propagated.Selective breeding (also called artificial selection) is the process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits (characteristics) by choosing which typically animal or plant males and females will sexually reproduce and have offspring together.

b) 2 advantages of micro propagation over the more traditional technique of taking cuttings :-

c) Plants produced by micropropagation are called somaclones.

Explanation:

Above attachment is some Explanation of no.C) .

Answer:

D. 180 liters

Explanation:

The GFR is 125 ml/minute. 1 hour has 60 minutes so, 125 X 60=7500 ml will be the GFR in one hour. A day has 24 hours, so 7500 X 24=180,000 ml will be the GFR in one day. Hence 180,000 ml of Glomerular filtrate (GF) will be produced in a day.

Photons of light are absorbed by electrons in NADPH, increasing its energy.

Although it operates similarly, photosynthesis requires the distinct fuel NADPH. A high-energy electron and proton are taken up by the low-energy form NADP+ and transformed into NADPH. NADPH changes back to NADP+ when one electron is lost. Overall, this process transforms light energy into chemical energy in the form of ATP and NADPH.

The Calvin cycle, the following stage of photosynthesis, uses ATP and NADPH from the light-dependent process to produce carbohydrates. Two electron transport chains work together to make ATP and NADPH. During the photoreaction, oxygen and water are both consumed. Since the process starts with sunlight, these reactions can only occur in the sun. the moment the photosystem is reached by an electron from the electron transport chain.

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Answer:

physical labels or identifiers

Explanation:

i think that's what you're looking for

Answer:

genetic features

Explanation:

1. A cytochemical stain that might be done on the peripheral blood smear to aid in diagnosis is a myeloperoxidase (MPO) stain. 2. If a myeloperoxidase (MPO) stain is performed, the results would be negative. 3. The mean corpuscular hemoglobin concentration (MCHC) cannot be determined with the given data since the hematocrit (Hct) value is not provided.

1. A cytochemical stain that might be done on the peripheral blood smear to aid in diagnosis is a myeloperoxidase (MPO) stain.

2. In this case, if a myeloperoxidase (MPO) stain is performed, the results would be negative.

3. The mean corpuscular hemoglobin concentration (MCHC) is calculated by dividing the hemoglobin concentration (HGB) by the hematocrit (Hct) and multiplying by 100. However, the information provided in the question does not include the Hct value, which is necessary for calculating the MCHC. Therefore, it is not possible to determine the MCHC with the given data.

4. The hematocrit (Hct) can be calculated by multiplying the red blood cell count (RBC) by the mean corpuscular volume (MCV) and dividing by 10. In this case, the RBC count is 4.43 x 10^6/uL and the MCV is 91 fL. Using the formula: Hct = (4.43 x 10^6) x (91) / 10, the calculated Hct is 40.273%.

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Answer:

Wegener suggested that perhaps the rotation of the Earth caused the continents to shift towards and apart from each other. (It doesn't.) Today, we know that the continents rest on massive slabs of rock called tectonic plates. The plates are always moving and interacting in a process called plate tectonics.

Explanation:

Answer:

cells wear out and die, so cell division creates replacement cells for the cells that are no longer functioning(aka have died).

Explanation:

I took Biology awhile ago, so this information may be a tiny bit off.

Answer:

Menstruation is one part of a woman's cycle when the lining of the uterus (endometrium) is shed. This occurs throughout a woman's reproductive life. With each monthly cycle, the endometrium prepares itself to nourish a fetus.

Explanation:

Answer:

Stomach

Explanation:

Answer:

The intertidal zone or area is defined as the area where the ocean and land meets between high and low tides.

Many of the organisms live in intertidal areas while fewer organisms live on high rocky shores because of the adaptation ability of the organisms.The probable reasons for this can be:

Example of animals living in intertidal zones are brittle stars,  barnacles, crabs and other.

Example of animals living in rocky shores are sponges, mussels and sea squirts et-cetra.

Hence, the animals evolve some adaptive feature that allow them to migrate to rocky shores.

29 Crore, a Hawaii population boom price may be computed via way of means of taking the modern-day populace length and subtracting the preceding populace length. Divide that quantity via way of means of the preceding length.

Multiply that via way of means of a hundred to get the percentage.In 2021, the actual GDP of Hawaii expanded via way of means of approximately 6.3 percentage in comparison to the preceding year Hawaiʻi become a internet populace loser, however now no longer frivolously so. The neighbor islands won almost 1,000 extra humans than they misplaced. But Honolulu misplaced 4,000 extra humans than it won from different states.

About 24,000 moved out of Oʻahu that yea\r — and most effective 20,000 moved in.The price of herbal growth refers back to the distinction among the variety of stay births and the variety of deaths taking place in a yr, divided via way of means of the mid-year populace of that yr, elevated via way of means of a factor (commonly 1,000).

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Answer:

The appearance of free oxygen in the Earth's atmosphere led to the Great Oxidation Event. This was triggered by cyanobacteria producing oxygen which developed into multicellular forms as early as 2.3 billion years ago

Explanation:

To clarify what I said here are some questions to help!

How did oxygen first appear?

Whiffs in the air is how oxygen first appeared billions of years ago.

For the most part, scientists agree that oxygen, though lacking in the atmosphere, was likely brewing in the oceans as a byproduct of cyanobacterial photosynthesis as early as 3 billion years ago

When was oxygen found?

2.33 billion years ago

Since its first appearance 2.33 billion years ago, oxygen accumulated in high enough concentrations to have a weathering effect on rocks just 10 million years later.

I don't know if this helped you but if it does, please let me know!

Answer:

A. Chloroplasts and mitochondria replicate in a similar manner as some prokaryotes

Explanation:

Endosymbiont theory deals with how eukaryotic organisms were formed from prokaryotic organisms. Prokaryotes such as Bacteria were documented as the first form of life on earth through fossil records before eukaryotes came into light.

Organelles such as Chloroplasts and mitochondria replicate in a similar manner as some prokaryotes. This supports the endosymbiont theory that present-day eukaryotic cells are descendants of a successful symbiotic relationship between a host cell and an engulfed prokaryote

Glycolysis takes place in Cytoplasm were Reactant(inputs) is Glucose  and product is pyruvate linear metabolic pathway of enzyme-catalyzed reactions helps to convert glucose into two molecules of pyruvate in the presence of oxygen . Glycolysis is the first step in the cellular respiration .

Krebs cycle takes place in Mitochondrial matrix were Reactant(inputs) is  Acetyl coA and product is NADH, FADH2, oxaloacetate Krebs cycle converts the chemical energy of acetyl coenzyme A (acetyl CoA) into the reducing power of nicotinamide adenine dinucleotide (NADH). Krebs cycle takes third  place in cellular respiration .

Oxidative phosphorylation takes place in Mitochondrial membrane or cristae were reactant(input ) is NADH and product is ATP. Oxidative phosphorylation is generation of most ATP molecules . This process takes second place in cellular respiration .

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All the alleles present in all individuals in a species are referred to as the gene pool of that species.

In the field of population genetics, the gene pool is the total set of genes and their variations that exist within a population of a particular species. The gene pool includes both dominant and recessive alleles and all of the various genotypes that can be produced from them.Gene pool can vary from one population to another, and they can change over time within a population due to various factors such as natural selection, genetic drift, gene flow, mutation, and other factors.

The size and diversity of the gene pool are crucial to the survival and evolution of a species. A larger gene pool provides a greater potential for genetic variation and adaptability to changing environmental conditions. In contrast, a smaller gene pool may reduce the ability of a population to adapt to new challenges and increase the risk of genetic diseases and other issues. So therefore gene pool is all the alleles present in all individuals in a species of that species.

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Nonliving things can vary greatly from living things. An organism's realm describes more than just its physical properties.

Distinguish between myth and fact

The capacity to assemble scientific evidence to support a claim is the foundation of a fact. Myths are based on historical ideas and beliefs, whereas facts provide support.

Myth: In terms of science, a living organism is equivalent to a nonliving entity.

Fact: Nonliving things can vary greatly from living things.

Evidence: Once upon a time, living things were composed of distinct materials than non-living ones. Despite not being alive, rocks don't have the same structure as creatures that are. Given that it includes components like cells, proteins, etc., if we were to examine a once-living object that is now dead, we would probably infer that it was a living thing. Dirt or any other similar substance wouldn't have done it.

Myth: The Linnaeus system of classification will always stay the same.

Fact: The reason for the Linnean system of classification's widespread recognition is its ability to transmit intricate connections to scientists around the globe.

Evidence: Despite the fact that many scientists attempted to classify living organisms, Carl Linnaeus was the first to develop a sequential categorization of living organisms under various taxons, including kingdom, phylum, class, order, family, genus, and species.

Myth: Tigers and goldfish are not related.

Fact: As vertebrate creatures, they share some traits and are members of the same Phylum even though they are not closely related.

Tigers and goldfish pertain to different Classes, as explained. The class Mammalia includes tigers (Panthera tigris), while the class Actinopterygii includes goldfish (Carassius auratus). But they are both members of the Phylum Chordata.

Fact: An organism's realm describes more than just its physical properties.

Evidence: Kingdom Plantae: Photosynthesis is how they get their sustenance. mate in an asexual way.

They stalk or eat other living things to get their food, which belongs to the kingdom Animalia. physically reproduce.

Myth: Mammals and plants don't belong in the same domain.

Fact: Plants and mammals share the same domain.

Evidence: Domains are categorized according to their cell intricacy and number of cells.

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The likelihood that the woman carries haemophilia is 2/3. There is a 50% probability that she will give birth to a boy who has haemophilia if she is a carrier and marries a healthy man.

Hemophilia in women who are heterozygous simply implies that they are carriers of the condition and do not phenotypically exhibit it.

Yet, because females must inherit the mutated X chromosome from their dads in order to be female and because they can carry the gene to their sons, all daughters of a man with haemophilia are regarded as obligate carriers of the disease.

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Answer: Gases in the atmosphere, such as carbon dioxide, trap heat similar to the glass roof of a greenhouse.

Explanation: These heat-trapping gases are called greenhouse gases. During the day, the sun shines through the atmosphere.

Gases like carbon dioxide is a green house gas. It can trap the temperature radiated from the earth surface and return back the heat in the surface. Therefore, if the carbon dioxide gas is trapped in the atmosphere, the atmospheric temperature increases.

The heat energy from sun is radiated to the earth surface make the planet warmer. However, some  fractions of the heat is radiating back from the atmosphere.

Gases like carbon dioxide, methane etc. are capable of absorbing the temperature intensely and make the atmosphere warmer. These gases are called green house gases and the effect is known as green house effect.

Green house effect leads to rise in global warming. Hence, if the gases like carbon dioxide is trapped in the atmosphere, the temperature increases.

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Answer:

2 and 5

Explanation:

Start paying attention :)

Answer:

2 and 5

Explanation:

Make sure you pay attention in class

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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