Sickle cell anemia is a genetic disease caused by a recessive allele. Sickle cell anemia affects the hemoglobin in red blood cells, making them the shape of crescents instead of disks. The disease can cause pain and damage blood vessels. A genetic counselor meets with a man and a woman that both are carriers of sickle cell anemia. Carriers have one copy of the sickle cell allele and one copy of the allele for making normal hemoglobin. What is the probability that the couple would have a child that was also a carrier for sickle cell anemia

1 J = 1 N m. Work can be either positive or negative: if the force has a component in the same direction as the displacement of the object, the force is doing positive work. If the force has a component in the direction opposite to the displacement, the force does negative work

Answer: C

Explanation:

When a neuron receives a stimulus, the sodium channels present in the membrane are opened, and therefore Na+ enters the cell in favour of the concentration gradient, so that the membrane potential changes to positive by means of ion exchange, producing depolarization. If this depolarization reaches a certain threshold value, an action potential is generated. The next step is the opening of the potassium channels and the inactivation of the sodium channels, so that the repolarization of the membrane takes place. The sodium channels, will return to the closed state in the hyperpolarization to continue in this state during all the rest potential achieving the action potential to return to -70 mV (repolarization).; until the arrival of a new action potential which produces the activation and opening of the sodium channels, repeating the cycle again and generating a new depolarizing action. This process is part of the synaptic transmission.

So, hyperpolarization is any change in the cell's membrane potential, which makes it more polarized. This means, hyperpolarization is an increase in the absolute value of the cell's membrane potential. Thus, changes in membrane voltage where the membrane potential is more distinctly positive or negative are hyperpolarizations.

During the repolarization period after an action potential, the membrane potential is more negative than when the cell is in "rest period". In the picture, this repolarization period is about 1-2 milliseconds. So, repolarization is the time in which the membrane potential is hyperpolarized with respect to the resting potential.

In the attached figure, part C indicates this repolarization period.

Answer:

O hydrogen

Explanation:

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Answer:

ozone

Explanation:

Out of the 1% of trace gases it makes up .01% of them.

Answer:

B: Permiable but selective, like a wall with gates.

Explanation:

Answer: Coacervates are similar to living organisms as they are capable of absorbing nutrition and also can grow under proper living conditions.

Explanation: Coacervates are regarded as the foundation of early life in Oparine Haldane theory's (abiogenesis) view. In order to manufacture organic compounds from an ocean of food, scientists think that they developed chemically.

They consist of a grouping of colloidal droplets held together by hydrophobic force.

Both live cells and non-living cells share certain commonalities with them. In a suitable physical and chemical environment, they can develop and absorb nutrients. Although they are incapable of reproduction, coacervates can maintain homeostasis just like living cells. A live organism's ability to reproduce is one of its most crucial characteristics. Therefore, we are unable to classify them as living entities.

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Answer is C.

Explanation: Exercise is good for the body. It helps regu

Answer:

The nuclear envelope surrounds the nucleus.

Explanation:

The stuff around the nucleoil contained within the envelope is DNA. I see that u are new. Welcome to brainly.

The city closest to each pair of coordinates are as follows:30°N 90°W: Mexico City, Mexico30°N 30°E: Baghdad, Iraq60°N 30°E: St. Petersburg, Russia

The coordinates given are in the format of latitude and longitude. Latitude is the measurement of distance from the equator, measured in degrees north or south of the equator. Longitude is the measurement of distance from the prime meridian, measured in degrees east or west of the prime meridian. Mexico City, Mexico lies closest to the coordinates 30°N 90°W.Baghdad, Iraq lies closest to the coordinates 30°N 30°E.St. Petersburg, Russia lies closest to the coordinates 60°N 30°E.

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Explanation:

Bacteria have a thin flexible cell wall. Only plant cells have primary and secondary cell walls.

Answer:

I think it's cell wall and chloroplasts

Answer:

It is a primary structural and functional unit of ecology. The structure of an ecosystem is related to its species diversity. The function of the ecosystem is related to energy flow and cycling of nutrients through and within the system.

The correct option among all the options that are given in the question is option E. Biochemists measured the amount of DNA in cells growing in the laboratory and found that the quantity of DNA in the cells doubled between the G1 and G2 phases.

DNA duplication is the mechanism through which eukaryotic cells replicate their genome before cell division. The cell cycle can be classified into two stages. These two stages include the interphase and M-phase or mitotic stage. The interphase is composed of three phases. These three phases include G1 (Gap1) phase, S (synthesis) phase, and G2 (Gap2) phase. During the interphase, the cell grows and prepares for cell division. The M-phase includes mitosis and cytokinesis.

Mitosis is composed of five stages that include prophase, prometaphase, metaphase, anaphase, and telophase. Cytokinesis is the division of the cytoplasm and usually begins in late anaphase or early telophase. Interphase is composed of three phases G1, S, and G2. The G1 phase is the first stage, where the cell prepares itself for DNA replication. The S phase, which stands for the synthesis phase, is the second stage where DNA replication occurs, and the cell synthesizes a duplicate copy of DNA. During the G2 phase, the cell continues to grow and replicates other cellular components such as the centrioles. Therefore, the quantity of DNA in the cells doubled between the G1 and G2 phases.

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A community is a group of different species living and interacting within an ecosystem. These species interact with each other in various ways, such as through predation, competition, and mutualism, forming a complex web of relationships that helps to define the structure and function of the ecosystem.

For example, a forest community might include trees, shrubs, herbaceous plants, insects, birds, mammals, fungi, and bacteria, all of which interact with each other in various ways. The trees provide habitat and food for animals, while the animals help to disperse seeds and pollinate flowers. The fungi break down dead plant material and recycle nutrients, while the bacteria fix nitrogen and aid in decomposition.

Each species has a role to play within the community, and changes to one part of the community can have ripple effects throughout the ecosystem. In contrast, a population refers to a group of individuals of the same species living in the same area, while an ecotone refers to a transitional area between two different ecosystems.

A trophic level refers to a group of organisms that occupy the same position in a food chain, such as primary producers or tertiary consumers. An aggregation refers to a temporary gathering of individuals, such as a school of fish or a herd of deer.

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Answer:

B is correct

Explanation:

I just took the test :)

Answer:

The correct answer is D.) the curved surface of Earth.

Explanation:

The intensity of sunlight on Earth is affected by the curved surface of Earth, which causes the sunlight to spread out over a larger area. As a result, the intensity of sunlight is less at any given point on Earth's surface than it would be if Earth had a flat surface. This also explains why the poles receive less sunlight than the equator, as sunlight is spread out over a larger area near the poles due to the curvature of the Earth.

Factors such as the mass of Earth, the speed of Earth, and the number of rotations of Earth do not directly affect the intensity of sunlight on Earth.

The oxidation of 1 molecule of NADH by nitrate (NO3-) would yield approximately 4.3 ATP molecules per NADH molecule due to its reduction potential at 0.54 V.

The standard reduction potential of elemental sulfur (S) is at 0.04 V and therefore in the oxidation of 1 NADH molecule, it would synthesize around 1.2 ATP molecules per NADH molecule. The oxidation of NADH by ½ O2 molecule yields approximately 2.5 ATP molecules per NADH molecule due to the reduction potential of oxygen at 0.82 V.

The amount of ATP molecules generated from each of the terminal electron acceptors in NADH oxidation show the significant influence that the reduction potentials of the different terminal electron acceptors have on the amount of ATP the bacteria can synthesize.

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Answer:

I think the answer is O.

Explanation:

Answer:

O

Explanation:

Answer:

Explanation:

- Fertilizer during runoff

- Heat, and radiative chemicals

- Yards and runoff

- Heating the water if run by steam by pumping the waste into rivers

- The clean water act focuses on navigation and water as in fishing, and swimming water while the safe drinking water act dictates how water comes to our cups from their original sources.

- You can get information by any sites locally about disposing chemical waste or any government website ending in .gov

- Home waters including sewage have to be filtered through heavy chemical processes using extra waters and factories. our clean water volume is plummeting.

Explanation:

Meiosis produces haploid gametes (ova or sperm) that contain one set of 23 chromosomes. When two gametes (an egg and a sperm) fuse, the resulting zygote is once again diploid, with the mother and father each contributing 23 chromosomes.

The ratio that represents the various genotypes of a test cross' offspring is called the genotypic ratio. It depicts the distribution of offspring in accordance with genotype, the genetic makeup that determines an organism's phenotype.

The genetic makeup of sperm and ova, the sex cells or gametes used in the conception, determines the genotype of an offspring. From each parent came one sex cell. Normal sex cells only contain one copy of each gene for each trait.

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Answer: The below are following hazards of four-legged animals and fish.

Explanation:

The four legged animals like cats, dogs, horse, and others need proper shelter, food, and care to survive.

They need to be taken outdoors for excretion, and walk.

The mating period is not fix and not easily done.

The four like fishes like turtle and squid are difficult to be handled in aquarium.

The four legged fishes do not come in fishing net during aquarium cleaning.

There are chances of being biten by four legged animals and their associated diseases like rabies.

These animals can lick the food we eat and contaminate the food.

The animal feces may produce air pollution.

The animal noise like dog bark can cause noise pollution.  Thus can lead to problem of hypertension.

Explanation:

555555dddfffccccvvbkf

Answer:

Explanation:

This is the the theory that describes protein building in this order: DNA to RNA to protein.  Protein is never back-translated to RNA or DNA; DNA is never directly translated to protein. Chromosome. This is the structure in the cell nucleus that houses a cell's genetic information.

Answer:

Bread mold is an example of a fungus.

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Answer:

A. It forms a barrier that controls what enters and leaves the cell.

Explanation:

The plasma membrane (or cell membrane) helps to seperate the interior contents from the outside enviroment, while also controlling the transport of materials inside and outside of the cell. Here's an image of this if it helps!

A

The horse and donkey are the most similar species on the chart because the two have the lowest number on the graph. Lower number= The more related.

Here the correct answer is that the chicken and the penguin are more closely related than the horse and donkey, which are in option D, as can be inferred from the fact that they share a higher percentage of similar DNA sequences.

The chart compares the similarities in DNA between four different organisms: the horse, the donkey, the chicken, and the penguin. The chart shows the percentage of DNA sequences that are similar between each pair of organisms. To interpret the chart, you can compare the percentage of similar DNA sequences between each pair of organisms. The higher the percentage, the more closely related the organisms are.

Hence, here the correct answer is that the chicken and the penguin are more closely related than the horse and donkey, which are in option D.

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Any disruption of this equilibrium can lead to the ecosystem's decline, which can have detrimental effects on all of the ecosystem's constituent parts.

A community of living and nonliving creatures that interact with one another in a particular setting is called an ecosystem. It is made up of abiotic (nonliving) elements like water, air, soil, and sunlight as well as biotic (living) elements like plants, animals, and microorganisms.

The harmony of an ecosystem's producers, consumers, decomposers, and surroundings is essential to its existence and stability. Each of these elements is crucial to preserving the delicate ecosystem's balance, and any disruption to this balance can lead to the ecosystem's degeneration.

For instance, if the population of producers, like plants, declines as a result of overuse or disease, this would have an impact on the availability of food for consumers, like herbivores, and this will have an impact on the number of predators that eat herbivores. The ecology may eventually become unstable as a result of this disruption in the food chain, which may also cause a drop in the population of different species.

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Answer:

1. Interphase

2. Chromatin

3. Chromosomes

4. The equatorial plane

5. Anaphase

6. Cytokinesis

7. nucleolus

8. Interphase

9. The centromere of each pair of sister chromatids

10. Prophase

Answer:

The probability of getting offspring that are heterozygous for smooth AND heterozygous for yellow, RrYy is 1/4 = 25%.

Explanation:

Due to technical problems, you will find the complete explanation in the attached files.