What percent of energy is transferred between the levels indicated by the blue arrows?

A. 50

B. 90

C. 100

D. 10

Answer:F

Explanation: I just know

Food storage and digestion take place in an amoeba occur through food vacuoles.

Amoeba is a monocellular organism that shows holozoic nutrition. It absorbs nutrients and food from the surroundings by contracting the vacuole. It has pseudopodia a drizzle-like structure that moves food into the vacuole. Inside this vacuole, there are lysosomes that contain the hydrolytic enzymes. These enzymes perform the breakdown of food particles. The digested food is then directly absorbed through the cytoplasm. This is circulated to organelles and stored for energy. After assimilation, the undigested food and waste are excreted out by fusing of food vacuole with the cell membrane.

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Answer:

Explanation:Amoebas are single-celled organisms that belong to group protozoa.Food storage and digestion occur through process called phagocytosis. Due the presence of flexible membrane,they can change their shape,viz essential for their feeding mechanism.

Psuedopods are temporary projections of its cell membrane which is extended when it encounters a food particle. These pseudopods surround the food particle forming a small cavity called food vacoule.

Once the food particle is enclosed within the food vacuole, the membrane of the vacuole fuses and forms a (digestive vacuole)phagosome which contains the food particle and digestive enzymes. The digestive enzymes in phagosome breakdown the food particle into smaller molecules. The enzymes include proteases for protein digestion, carbohydrases for carbohydrate digestion, and lipases for lipid digestion.

Smaller molecules are gradually absorbed into the cytoplasm of the amoeba, where they can be utilized for various metabolic processes. The digestion products are transported across the membrane of the digestive vacuole into the cytoplasm through diffusion.

Any undigested or indigestible material is eventually expelled from the amoeba's body by process of exocytosis. During exocytosis, the residual waste material is packaged into a vesicle and then released outside the cell.

Food storage and digestion in amoebas involve

1: the engulfment of food particles through phagocytosis,

2: the formation of digestive vacuoles,

3: enzymatic breakdown of the food,

4:absorption of nutrients into the cytoplasm,

5: and elimination of waste materials through exocytosis.

Answer:

Water and carbon dioxide

The water becomes oxygen and the carbon dioxide gets turned into glucose.

Dams preserve water, generate power, cause mass migration, and are expensive. Dams regulate water supply for domestic, industrial, and electric uses.

A dam is a structure that stops or slows the flow of water on the surface or in the ground.

Advantages of building a dam are:

Disadvantages are:

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Approx. 47.4% of the group is heterozygous for the sickle hemoglobin allele. If a group is in Hardy-Weinberg equilibrium, then frequencies of allele in the population remain constant from one generation to the next.

If a group is in Hardy-Weinberg equilibrium, it means that the frequencies of alleles in the population remain constant from one generation to the next. In this case, we can use the Hardy-Weinberg equation to determine the percentage of the group that is heterozygous for the sickle hemoglobin allele.
The Hardy-Weinberg equation is p² + 2pq + q² = 1, where p represents the frequency of the dominant allele (H) and q represents the frequency of the recessive allele (h). In this equation, p² represents the frequency of homozygous dominant individuals, q² represents the frequency of homozygous recessive individuals, and 2pq represents the frequency of heterozygous individuals.
To find the percentage of the group that is heterozygous for the sickle hemoglobin allele, we need to calculate the value of 2pq. Let's say the frequency of the sickle hemoglobin allele (h) is 0.4. Since q represents the frequency of the recessive allele, q = √0.4 ≈ 0.632. Now we can substitute this value into the equation: 2pq = 2 * 0.632 * 0.368 ≈ 0.474.
Therefore, approximately 47.4% of the group is heterozygous for the sickle hemoglobin allele.

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The protein that attaches HIV-1 to the surface of a sensitive cell is gp120.

What is HIV-1? Human immunodeficiency virus (HIV) is a retrovirus that causes acquired immunodeficiency syndrome (AIDS). HIV-1 is a strain of HIV that is responsible for most infections in humans.

When HIV infects immune system cells, it progressively destroys or incapacitates them, resulting in a weakened immune system that cannot fight off other infections and diseases. HIV is transmitted via bodily fluids, typically through unprotected sexual activity, but also via sharing needles or coming into touch with contaminated blood.

To enter the host cell, the virus must first attach itself to the host cell. HIV does this with the assistance of its surface protein, gp120. HIV attaches to the CD4 receptor on human immune cells (primarily T helper cells) using the gp120 protein. After binding to CD4, HIV attaches to a chemokine coreceptor (usually CCR5 or CXCR4).

These receptors allow HIV to enter the cell after binding.

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The statement which describes the culture of the Anasazi and Aztec best is that they were known for farming and is denoted as option C.

This is defined as a practice which is characterized by the growing of crops and rearing of animals for personal and commercial purposes and is dependent on resources such as availability of water, sunlight etc.

The people of Anasazi and Aztec are known to be predominantly into agriculture and employed the use of irrigation systems so as to ensure that their crops are well watered for optimal growth and yield.

This is therefore the reason why option C was chosen as the most appropriate choice.

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Hypoproteinemia is the condition in which there are unusually low levels of protein in the blood.

hypoproteinaemia can be brought on by hepatic failure, nephrotic syndrome, high plasma protein loss into the gut lumen, intestinal disease-related malabsorption, or starvation  into the gut lumen (protein-losing enteropathy.

Insufficiency of protein in the body is known as hypoproteinemia. Nearly all of the body's organs, including the bones, muscles, skin, hair, and nails, contain protein, an essential nutrient. Your muscles and bone health are maintained by protein. viruses that cause hepatitis B, hepatitis C, or HIV/AIDS.

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Answer:

Replication occurs in three major steps: the opening of the double helix and separation of the DNA strands, the priming of the template strand, and the assembly of the new DNA segment. During separation, the two strands of the DNA double helix uncoil at a specific location called the origin.

The term p53 is phosphorylated in response to "DNA damage," resulting in stoppage of the cell cycle.

To explain further:

1. DNA damage occurs, which can be caused by various factors such as radiation, chemicals, or errors during replication.
2. In response to this damage, the p53 protein becomes activated through phosphorylation.
3. The activated p53 protein then acts as a transcription factor, promoting the expression of specific target genes.
4. These target genes help stop the cell cycle, allowing for DNA repair or initiating apoptosis (programmed cell death) if the damage is too severe.

In summary, p53 phosphorylation in response to DNA damage plays a crucial role in maintaining genomic stability by stopping the cell cycle and allowing for repair or elimination of damaged cells.

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Answer:

25 percent

Explanation:

25 percent 25 percent

Answer:

I think that electricity doesn't harm environment.because the environment is getting polluted from polluted gases.

Explanation:

Better planning trees and avoiding things which harm environment.

A tetrahedral die is an equilateral triangular pyramid with the base edge of the tetrahedral die is 26 millimeters and the height is 20 millimeters has the surface area of the tetrahedral die is approximately 1350 square millimeters to the nearest ten square millimeters.

A tetrahedral die is an equilateral triangular pyramid. The base edge of the tetrahedral die is 26 millimeters and the height is 20 millimeters. What is the surface area of the tetrahedral die to the nearest ten square millimeters?Surface area of tetrahedral dieTo find the surface area of the tetrahedral die, we need to first calculate the area of the triangular faces and then add them up.

The surface area of a tetrahedral die can be calculated as follows:Surface area of a tetrahedral die = Sum of the areas of all its triangular faces.Area of an equilateral triangle. A tetrahedral die is an equilateral triangular pyramid. An equilateral triangle is a triangle where all its sides and angles are equal. The area of an equilateral triangle is given by the formula:Area of an equilateral triangle = (√3/4) * a² where a is the length of each side of the equilateral triangle. Substituting a = 26mm,Area of the equilateral triangle = (√3/4) * 26²= 338 mm².

The tetrahedral die has four equilateral triangular faces. So, its surface area can be calculated by adding the area of each triangular face. Therefore,Surface area of the tetrahedral die = 4 × area of the equilateral triangle= 4 × 338= 1352 mm²= 1.4 × 10³ mm²Therefore, the surface area of the tetrahedral die is approximately 1350 square millimeters to the nearest ten square millimeters.

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Answer:

Explanation:

Here are 10 examples of disease-causing microorganisms (pathogens), along with their habitats and the diseases they can cause:

1.Escherichia coli (E. coli)

Habitat: Found in the intestines of humans and animals.

Disease: Causes food poisoning and urinary tract infections.

2.Influenza virus

Habitat: Found in respiratory droplets and surfaces contaminated by infected individuals.

Disease: Causes seasonal flu and can lead to severe respiratory illness.

3.Salmonella

Habitat: Found in the intestines of animals, including birds, reptiles, and mammals.

Disease: Causes salmonellosis, which leads to gastrointestinal symptoms such as diarrhea and vomiting.

4.Streptococcus pneumoniae

Habitat: Found in the respiratory tract of humans.

Disease: Causes pneumonia, sinus infections, and other respiratory tract infections.

5.Human Immunodeficiency Virus (HIV)

Habitat: Found in human blood, semen, vaginal fluids, and breast milk.

Disease: Causes Acquired Immunodeficiency Syndrome (AIDS), which weakens the immune system.

6.Staphylococcus aureus

Habitat: Found on the skin and in the nasal passages of humans.

Disease: Causes various infections, including skin infections, pneumonia, and bloodstream infections.

7.Plasmodium

Habitat: Found in the gut of female Anopheles mosquitoes and the blood of infected humans.

Disease: Causes malaria, a mosquito-borne disease characterized by recurring fever and other symptoms.

8.Mycobacterium tuberculosis

Habitat: Primarily affects the lungs of humans.

Disease: Causes tuberculosis (TB), a bacterial infection that primarily affects the respiratory system.

9.Candida albicans

Habitat: Found on the skin, mucous membranes, and gastrointestinal tract of humans.

Disease: Causes candidiasis, which includes yeast infections in various parts of the body.

10.Chlamydia trachomatis

Habitat: Infects the genital and urinary tracts of humans.

Disease: Causes sexually transmitted infections (STIs) such as chlamydia, which can lead to various complications if left untreated.

Answer:

it's due to global warming and the increasing of population

also some how deforestation also

Answer: The environmental change put selection pressure on the population of the bacteria so that some trait variations had a competitive advantage for surviving over time.

Explanation: So, in Addie’s case, the environmental change was the antibiotics. The antibiotics led to the weaker bacteria to die off while the stronger bacteria reproduced and grew larger in population. This is called selection pressure. So to sum it all up, the bacteria population became more resistant because of the pressure selection out into them by the antibiotics. So, the weaker bacteria died off and the stronger one grew larger and larger, becoming antibiotic resistant. Sorry if I’m too late but I hope this clarifies your question!

Answer:

Key points

Humans—and other complex multicellular organisms—have systems of organs that work together, carrying out processes that keep us alive.

The body has levels of organization that build on each other. Cells make up tissues, tissues make up organs, and organs make up organ systems.

The function of an organ system depends on the integrated activity of its organs. For instance, digestive system organs cooperate to process food.

The survival of the organism depends on the integrated activity of all the organ systems, often coordinated by the endocrine and nervous systems.

Introduction

If you were a single-celled organism and you lived in a nutrient-rich place, staying alive would be pretty straightforward. For instance, if you were an amoeba living in a pond, you could absorb nutrients straight from your environment. The oxygen you would need for metabolism could diffuse in across your cell membrane, and carbon dioxide and other wastes could diffuse out. When the time came to reproduce, you could just divide yourself in two!

However, odds are you are not an amoeba—given that you're using Khan Academy right now—and things aren’t quite so simple for big, many-celled organisms like human beings. Your complex body has over 30 trillion cells, and most of those cells aren’t in direct contact with the external environment.^1

1

start superscript, 1, end superscript A cell deep inside your body—in one of your bones, say, or in your liver—can’t get the nutrients or oxygen it needs directly from the environment.

How, then, does the body nourish its cells and keep itself running? Let's take a closer look at how the organization of your amazing body makes this possible.

Multicellular organisms need specialized systems

Most cells in large multicellular organisms don't directly exchange substances like nutrients and wastes with the external environment, instead, they are surrounded by an internal environment of extracellular fluid—literally, fluid outside of cells. The cells get oxygen and nutrients from this extracellular fluid and release waste products into it. Humans and other complex organisms have specialized systems that maintain the internal environment, keeping it steady and able to provide for the needs of the cells.

Different systems of the body carry out different functions. For example, your digestive system is responsible for taking in and processing food, while your respiratory system—working with your circulatory system—is responsible for taking up oxygen and getting rid of carbon dioxide. The muscular and skeletal systems are crucial for movement; the reproductive system handles reproduction; and the excretory system gets rid of metabolic waste.

Because of their specialization, these different systems are dependent on each other. The cells that make up the digestive, muscular, skeletal, reproductive, and excretory systems all need oxygen from the respiratory system to function, and the cells of the respiratory system—as well as all the other systems—need nutrients and must get rid of metabolic wastes. All the systems of the body work together to keep an organism up and running.

One first learns which trait is dominant during the study of genetics, typically in high school biology or a similar course.

Genetics is the study of how traits are passed down from one generation to the next. Inherited traits can be either dominant or recessive. A dominant trait is expressed when a person has only one copy of the gene for that trait, while a recessive trait is only expressed when a person has two copies of the gene.

The concept of dominant and recessive traits is usually introduced in high school biology or a similar course. Students learn about Gregor Mendel, who is considered the father of genetics, and his experiments with pea plants. They also learn about Punnett squares and how to predict the likelihood of certain traits being expressed in offspring. Through this study, students learn about dominant and recessive traits and how they are inherited.

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Answer:

Option D

Explanation:

Pentose in Pentose sugar contains the root word "penta", meaning 5 sides, and so it must be the shape labeled C.

Answer: becteria

Explanation:

pasteur diveded micro-organisms in to severel group of and control groups.

Answer:

Phytoplankton

Explanation:

A decrease in the number of phytoplankton in this ecosystem will most significant affect the population of other organisms here.

The phytoplankton are the primary producers in an ecosystem and this implies that they produce their food using inorganic chemical sources. It is the food they produce that the primary consumers and other forms of consumers will depend on for their nourishment.

A decline in the population of the phytoplankton will adversely affect the population of organisms in this ecosystem.

Answer:

That's a difficult question, but I would choose either A or B.

Explanation:

Since the question is talking about MOVEMENT over the earth. C and D are talkig about how the air sinks or rises, so you can cancel those out, hope this helps a little! ❤

Answer:

Junk drawer

Explanation:

DNA strand replication begins on one end of the open part of the DNA strand which is therefore denoted as option D.

This is referred to as deoxyribonucleic acid and it is the genetic material of most living organisms as it ernsures thast traits are poassed from the parent to the offspring.

DNA replication initiates at specific points, called origins, where the DNA double helix is unwound which means it is at  one end of the open part. A short segment of RNA, called a primer, is then synthesized and acts as a starting point for new DNA synthesis.

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Answer:

Mitochondria

Explanation:

Helps give the cell energy in order to do its task because IT'S THE POWERHOUSE OF THE CELL! :)

If the diploid chromosome number for an organism is 54, the haploid number would be 27. This is because haploid is one set of chromosomes in the nucleus of a cell while diploid is two sets of chromosomes.

one from each parent.A haploid number refers to the number of chromosomes found in gametes or sex cells, and it represents half the number of chromosomes found in the parent cell. Gametes are reproductive cells with only one set of chromosomes.

In humans, for example, the diploid number is 46, which means that we have two sets of 23 chromosomes each, one set from our mother and the other from our father. The haploid number for humans is 23 because gametes contain only one set of 23 chromosomes.

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Answer:

-Scientists classify living things to organize and make sense of the incredible diversity of life.

-they do on the basis of shared physical characteristics. They place them in a hierarchy of groupings, beginning with the kingdom animalia and proceeding through phyla, classes, orders, families, gender and species.

The motion of molecules and the transfer of energy decreases with increase in volume of the solution.

The volume of a solution is inversely proportional to the motion of the molecules of a substance.

An increase in volume results in a decrease in the motion of particles due to a decrease in the frequency of particles and thus, less energy is transferred.

Therefore, the motion of molecules and the transfer of energy decreases with increase in volume of the solution.

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Answer:

decaying plants and waste products

Explanation:

Answer:

the property of high heat capacity allows highly regulated internal body temperatures.

Explanation: