The time lapse image below shows the path of the moon throughout one night. What is this event called? Drag and drop the best answer
into the white box.
DRAG & DROP THE ANSWER
moon cycle
solar eclipse
moon phase
lunar eclipses

Answer:

Explanation:

Option please

Answer: Light levels, water flow rate, temperature, dissolved oxygen, acidity (pH), salinity and depth.

Explanation: For aquatic ecosystems, these factors include light levels, water flow rate, temperature, dissolved oxygen, acidity (pH), salinity and depth. Light level is an important factor in aquatic ecosystems.

If a cell has a large number of chloroplasts present, the most likely function of that cell is photosynthesis. The correct option is D.

"Chloroplast is an organelle that contains the photosynthetic pigment chlorophyll, which captures sunlight and converts it into useful energy, allowing oxygen to be released from water."

They are in charge of photosynthesis, which is the process of converting light energy into sugar and other organic molecules that plants and algae use as food.

They also produce amino acids and lipids, which are required for the production of chloroplast membranes.

Thus, the correct option is D.

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In multicellular organisms, cell division allows development from a single cell into a multicellular organism, growth and making other cells to repair and replace worn-out cells (Option b all are correct).

Mitosis is a cell division process by which multicellular organisms can grow, repair tissues and also develop from a single cell called the zygote. This process is fundamental during the lifespan of multicellular life forms.

Therefore, we can conclude that mitosis is a multipurpose cell division process in multicellular organisms because it allows to growth and repair of tissues.

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Two types of nucleic acids are DNA and RNA. The functions of these two nucleic acids are DNA creates amino acids, and RNA puts the amino acids together to make a protein.

DNA is answerable for carrying and transmitting hereditary materials or genetic instructions from parents to offspring. In addition to ensuring that all living things pass on their genetic information, DNA is essential for the synthesis of proteins. on the other hand messenger RNA (mRNA) carries the protein draft from a cell's DNA to its ribosomes, which are the apparatus that drive protein synthesis. Transfer RNA (tRNA) then carries the relevant amino acids into the ribosome for inclusion in the new protein.

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The insoluble precipitate of ionic compound can pose great threat to the environment.

Insoluble precipitate is a solid substance formed during a chemical reaction. The precipitate of ionic compounds can cause danger to the environment as it is not degraded and hence can cause reactions that form toxic products.

The effects of insoluble precipitate on the environment are various. It can  make soil less rich in nutrients that will then affect the quality and yields of plants. If the precipitate is present on the surface of plants, which is then ingested by humans, it can cause diseases in humans as well. It can cause eutrophication of waterbodies, therefore affecting the lives of aquatic species.

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Answer:

B. the economies in Africa will be challenged to support a growing population.

Explanation:

Just because Africa is increasing faster than any continent, doesn't mean its improving or going to improve. More children means more healthcare for families which is more expensive. And most of Africa's population are in Stage 1. (Below Poverty, less than $1.10 a day). Most Africans don't make it past 64 years.

The Green Revolution was characterized by C increased yields by providing large improvements in the food production sector.

Large improvements in food production in developing nations were a hallmark of the “green revolution,” which was brought on by increasing use of herbicides, fertilizers, and different crop varieties.

The introduction of new, high-yielding cultivars into developing countries, which started in the middle of the 20th century with Borlaug’s work, had a significant role in the Green Revolution’s increased the production of different kind of food grains (particularly wheat and rice).

The green revolution boosted the availability and use of fertilizers, weedicides, and insecticides to increase farm output and minimize crop loss or damage.

With the development of commercial farming, it also assisted in promoting agriculture throughout the nation.

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c) Assist in the blood clotting process is not a function of the lymphatic and immune systems.

Blood clotting is a process that is done by the coagulation system of the body. Neither the lymphatic nor the immune system has any role is the blood clotting process.

The major role of the immune system is to provide a defense to the body agast any foreign particle that invades the body and has the potential to cause an infection in the organism.

The major function of the lymphatic system is to remove all the excess fluids in the body so that the fluid levels can be maintained in the body of an organism.

Hence, all of the above options are either the function of the immune of the lymphatic system except option c.

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The factors that might contribute to the development of melanoma in other 90% of patients is: all the given choices i.e., exposure to solar radiation, mutations in a melanocyte and exposure to chemical mutagens.

Melanoma is the cancer of the skin. It develops on the melanin pigment producing cells called melanocyte. It is also called the black tumor and is the most dangerous kind of skin cancer. Redness on the skin and change in the existing mole are a few symptoms.

Mutagens are the agents that cause cancer in the body. There are two types of mutagens: chemical and physical. The chemical mutagens can be alkylating agents, tobacco products, etc. The physical mutagens are the electromagnetic radiations.

The question is incomplete, the complete question is:

The American Cancer Society currently estimates that only about 10% of all people with melanoma have a family history of the disease. What factors might contribute to the development of melanoma in the other 90% of patients?

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Answer: aerobic cellular respiration

Explanation: got u

Answer:

Glucose is broken down during cellular respiration.

Explanation:

Hope it helps! =D

The main calvin cycle byproduct that is exported from the chloroplast and used by the plant cell is trise phosphate.

Calvin cycle, also known as the C3 cycle, is a series of chemical processes used by plants to convert carbon dioxide and other chemicals into glucose.

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The inventors of the compound are aiming primarily at offering it as a method for controlling the numbers of jellyfish although this will clearly be unsuccessful since shortly after fertilization jellyfish, and larvae become plant-like polyps, which rooted to the sea floor, facilitating budding, and the final release of offspring.

The informal popular names for the medusa-phase of several gelatinous members of the subphylum Medusozoa, a significant division of the phylum Cnidaria, are jellyfish and sea jellies. Many varieties of jellyfish are largely safe for people to consume. Others have the capacity to produce extreme discomfort and systemic response.

When jellyfish are stuck to coastal reefs, they are in the stalked (polyp) phase. When they are in the jellyfish (medusa) phase, they are floating among the plankton. The medusa is in the reproductive stage; its eggs undergo internal fertilization and grow into larval planulae that may swim freely.

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The twist is silenced in skin and not liver which is the reason why liver chromatin was found to be more dnase sensitive than the chromatin from skin cells.

This is referred to as a transcription factor which provides the instructions in the making of a protein in cells and ensures early development is achieved.

it attaches to certain parts of the DNA and the activity of some genes are controlled. It is silenced in cells such as that of the skin which is why  liver chromatin was found to be more dnase sensitive than the chromatin from skin cells.

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Primary brain cancers occur when normal cells' DNA changes (mutations). The DNA of a cell includes the instructions that inform the cell what to do. The mutations instruct the cells to grow and divide quickly and to live even when healthy cells would die.

A benign (non-cancerous) brain tumor is a collection of cells that grows slowly in the brain. Non-cancerous brain tumors often remain in one location and do not spread. It usually does not return if the entire tumor can be safely removed during surgery.

They have the potential to injure and compress portions of the brain, resulting in serious malfunction. Benign brain tumors in a critical part of the brain can be fatal. A benign tumor can become cancerous very rarely.

Note that an overview was given as the complete information wasn't found.

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Charles Darwin was a nineteenth‑century biologist who put forth the theory of evolution through natural selection and published his idea in the book entitled on the origin of species.

Charles Darwin was the evolutionary scientist who can up with the theory of natural selection and published his findings in the book known as the origin of species. This book, written by Darwin, forms the basis of evolutionary biology.

According to the theory of natural selection, those organisms that are better able to survive and adapt to an environment are selected naturally by the environment to reproduce and pass on their characteristics. The organisms which are not adaptable to the environment get removed from the environment through the process of evolution.

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Answer: The nervous system uses tiny cells called neurons to send messages back and forth from the brain, through the spinal cord,  to all the nerves throughout the body. Billions of neurons work together to create a communication network. Different neurons have different jobs.

Explanation:  

Neurons are the fundamental units of the brain and nervous system, the cells responsible for receiving sensory input from the external world, for sending motor commands to our muscles, and for transforming and relaying the electrical signals at every step in between.

Answer: 0%

Explanation:

All children have half of their chromosomes, from mom, and half from dad. Because mom is homozygous, each of her children will have at least one dominant trait, which will completely cover the recessive trait form their dad. However the children will still be carriers of this syndrome

False

Blood-brain barrier (BBB) is a selectively permeable membrane that regulate the the movement of molecules and cells into the brain from the blood.

It helps in maintaining the brain homeostasis by regulating the amount of molecules that enter the brain.

BBB is formed by endothelial cells of the brain and the barrier effectively seperate the brain from the rest of the body

Although study has shown that the interactions of endothelial cells with oligodendrocytes induce BBB function, the blood-brain barrier is not singlehandedly formed by oligodendrocytes.

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The best explains the relationship between HbS allele frequency and malaria endemicity in Africa is when an area is malaria free, the HbS allele frequency is between 0 and 2.02. The correct option is a.

Sickled hemoglobin is a genetic disease that changes the shape of hemoglobin cells from a circle to a sickle shape, which reduces their function and it causes hemoglobin disease in the person.

Malaria is caused by the anopheles mosquito. It causes fever and shivering of the body.

Therefore, the correct option is a. When an area is malaria free, the HbS allele frequency is between 0 and 2.02.

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The question is incomplete. Your most probably complete question is given below:

Which statement best explains the relationship between HbS allele frequency and malaria endemicity in Africa?

When an area is malaria free, the HbS allele frequency is between 0 and 2.02.

When an area is holoendemic, the HbS allele frequency is between 0.52 and 4.04.

When an area is malaria free, the HbS allele frequency is between 12.64 and 18.18.

When an area is holoendemic, the HbS allele frequency is between 0 and 0.51.

Answer:

Chloroplasts and mitochondria are said to be prokaryotic as they have their own genes on a small, circular chromosome but no nucleus. This chromosome has little non-coding DNA, similar to those of bacteria. Chloroplasts and mitochondria also make some of their own proteins from their gene.

hence endosymbiotic theory states that some eukaryotic cell organelles like mitochondria and chloroplast evolved from free living prokaryotes.the prokaryotes or single celled organism fuse to form eukaryotes as stated by Margulis.

Explanation:

According to the endosymbiotic theory, some eukaryotic cell organelles, such mitochondria and plastids, descended from prokaryotes that were free to move around.

The endosymbiotic hypothesis postulates that some organelles of eukaryotic cells were once prokaryotic bacteria.

Chloroplasts and mitochondria are identical in size to prokaryotic cells and divide by binary fission. The DNA in mitochondria and chloroplasts is circular rather than linear.

The information available supports Margulis' hypothesis that the mitochondrial endosymbiosis marked the beginning of the evolution of the eukaryotic cell.

Therefore, endosymbiotic theory states that some eukaryotic cell organelles like mitochondria and chloroplast evolved from free living prokaryotes.

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The following paragraph about catabolic reaction can be completed below:

The free energy released by the exergonic reactions of exergonic is stored in exergonic. The energy released by its hydrolysis to exergonic and pi drives the exergonic reactions of exergonic, which synthesize the complex molecules.

Also, during hydrolysis in mechanical and transport work, catabolic pathways is transformed into catabolic pathways.

In these transfers and transformations, some energy is lost as heat.

All the reactions of a cell require enzymes, which ensure efficient cell function by binding substrates and catabolic pathways activation energy, thus speeding up metabolic reactions.

Catabolic reactions refers to a type of metabolism which involves the breaking down of bigger molecules into smaller molecules.

So therefore, an exergonic reaction can simply be defined as those metabolic activities which occurs in the body by releasing or giving off energy.

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Answer: Stars have diffrent layers

The series of events that occurred in the endosymbiotic theory are as follows:

The endosymbiotic theory is theory that describes how eukaryotic cells arose from simple prokaryotic cells,

In the endosymbiotic theory, simple prokaryotic cells which developed abilities such as using oxygen as electron acceptor as well asthe ability to use carbon to produce food associted in a symbiotic relationship.

One prokaryotoc cell engulfed another prokaryotic cell with which it exists in a symbotic relationship with.

The engulfed cells became the organelles in eukaryotes such as mitochondria and chloroplast.

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Answer:

Alzheimer's disease

Explanation: did this in my biology class as well hope it helps though

A group of experimental drugs focuses on blocking the construction of neurofibrillary tangles by keeping tau protein anchored to microtubules as a possible treatment for Alzheimer's disease.

Neurofibrillary tangles are abnormal aggregations of tau protein that accumulate inside neurons in the brains of individuals with Alzheimer's disease. These tangles disrupt the normal functioning of neurons and contribute to the progression of the disease. Therefore, developing drugs that target the formation of neurofibrillary tangles is a potential therapeutic approach for Alzheimer's disease.

The experimental drugs mentioned in the statement aim to block the construction of neurofibrillary tangles by keeping tau protein anchored to microtubules. Tau protein normally plays a critical role in stabilizing microtubules, which are essential components of the cell's cytoskeleton responsible for maintaining cell shape and facilitating intracellular transport.

In Alzheimer's disease, abnormal modifications of tau protein cause it to detach from microtubules, leading to the formation of neurofibrillary tangles. These experimental drugs are designed to prevent the detachment of tau protein from microtubules, keeping it anchored and inhibiting the formation of tangles.

By maintaining the proper function of microtubules and preventing the aggregation of tau protein, these drugs aim to slow down or halt the progression of Alzheimer's disease. The potential benefits include preserving neuronal integrity, reducing cognitive decline, and improving overall brain function in affected individuals.

However, it is important to note that the effectiveness and safety of these experimental drugs are still being studied, and they have not yet been approved for clinical use. Ongoing research is vital to further understand the mechanisms involved and to develop effective treatments for Alzheimer's disease.

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The technology that needs to be used to separate the GFP gene from a sample of jellyfish from the rest of the DNA is gel electrophoresis.

Gel electrophoresis is a technique used in molecular biology laboratories to separate molecules according to the electrical charges and size. DNA has a negative charge, thereby this molecule can be separated according to the size of its fragments that migrates to the positive pole.

Therefore, we can conclude that gel electrophoresis is a technique used to separate fragments of DNA in a sample.

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The carbon cycle depicts the movement of carbon on Earth in its elemental and combined states. Carbon exists as carbonates in minerals and as carbon dioxide gas in the atmosphere in its combined state as diamond and graphite.

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