Astronomy is the study of

Answer:

2. Indications of severe climatic change. (Ancient climate).

Continental drift theory propounded by Alfred Wegener in 1920’s broke myth of permanency of earth surface. According to the theory, there existed one big landmass which he called Pangaea covered by one big ocean called Panthalassa.

A sea called Tethys divided the Pangaea into two huge landmasses: Laurentia (Laurasia) to the north and Gondwanaland to the south of Tethys.

Drift started around 200 million years ago (Mesozoic Era), and the continents began to break up and drift away from one another and occupied present position as shown below.

The drift was in two directions-

1.

equator wards due to the interaction of forces of gravity, pole-fleeing force and buoyancy (ship floats in water due to buoyant force offered by water), and

2.

westwards due to tidal currents because of the earth’s motion (earth rotates form west to east, so tidal currents act from east to west

Evidences in support of theory are

1) Affinity of physical features (Jig saw fit)

Ex: South America and Africa (especially, the bulge of Brazil fits into the Gulf of Guinea

Greenland and Ellesmere and Baffin islands

The east coast of India, Madagascar and Africa

North and South America on one side and Africa and Europe on the other fit along the mid-Atlantic ridge.

2) Fossil deposits

The observations that Lemurs occur in India, Madagascar and Africa led some to consider a contiguous landmass “Lemuria” linking these three landmasses.

Mesosaurus was a small reptile adapted to shallow brackish water. The skeletons of these are found only in South Africa and Iraver formations of Brazil. The two localities presently are 4,800 km apart with an ocean in between them.

3) Botanical evidence

Presence of glossopteris vegetation in carboniferous rocks of India, Australia, South Africa, Falkland Islands (Overseas territory of UK), Antarctica, etc. can be explained on the basis of the fact that parts were linked in the past.

4) Rocks of same age across continents

The belt of ancient rocks of 2,000 million years from Brazil coast matches with those from western Africa.

5) Tillite deposits

It is the sedimentary rock formed out of deposits of glaciers. The Gondwana system of sediments from India is known to have its counter parts in six different landmasses of the Southern Hemisphere. At the base the system has thick Tillite indicating extensive and prolonged glaciation. Counter parts of this succession are found in Africa, Falkland Island, Madagascar, Antarctica and Australia besides India.

6) Placer deposits - Rich placer deposits of gold are found on the Ghana coast (West Africa) but the source (gold bearing veins) are in Brazil and it is obvious that the gold deposits of the Ghana are derived from the Brazil plateau when the two continents lay side by side.

Answer:

The correct answer is B. "Melanocytes and muscle cells express different genes."

Although all cells in an organism (such as a human) contain the same DNA, different cell types express different sets of genes. Gene expression is the process by which specific genes are activated to produce a needed protein. In this case, the gene responsible for melanin production is expressed in melanocytes, but not in muscle cells.

This does not mean that muscle cells have destroyed the gene for melanin (as stated in option C) or that melanocytes contain different genes from muscle cells (as stated in option D). All cells within an organism contain the same genes, but not all genes are expressed in every cell. The process of gene expression is regulated by the cell to ensure that each cell type functions properly.

Option A is also incorrect because all cells, including both muscle cells and melanocytes, rely on both DNA (for storing genetic information) and RNA (for transmitting that information and producing proteins). DNA is transcribed into RNA, which is then translated into proteins. This process occurs in all cells.

The statement explains the difference between skin melanocytes and muscle cells is - melanocytes and muscle cells express different genes. So option b  is correct.

Melanocytes are dark, dendritic-shaped, highly differentiated cells that secrete melanin, a pigment found in melanosomes, which is the primary function of melanocytes.

Melanocytes are a type of cell derived from the neural crest. They form a synapse with keratinocytes through their dendrites in the epidermis. Melanocytes play an important part in skin pigmentation and their role in the generation and distribution of melanin has been extensively studied.

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The first medical treatment your doctor should implement before you are harmed by snake venom is to cut and bleed the bitten area.

Your doctor should administer an injection of antibodies against snake venom before you experience any negative effects from the poison. The purpose of this medication, sometimes referred to as antivenom or antivenin, is to particularly counteract the effects of snake venom. The antivenom can lessen the severity of the symptoms and neutralize the negative effects of the venom by injecting you with antibodies that specifically target the venom toxins. To avoid or lessen the systemic effects of the venom on your body, antivenom should be given as soon as possible after the snake bite. A red blood cell transfusion, giving total gamma globulins, cutting and bleeding the bitten region, or delivering antibiotics are not thought of as the major treatments.

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Answer:

they are energetic and they are joyful

The nurse would anticipate administering omeprazole in conjunction with an antibiotic for peptic ulcer due to H. Pylori infection.

Helicobacter pylori (H.pylori) is a gram-negative bacteria that is usually found in your stomach. It attacks the mucus lining of the stomach and causes damage. After the mucus lining is damaged enough, the HCl produced by the stomach enters the lining and causes sores or ulcers. This is referred to as H.pylori infection.

H. Pylori infection can lead to internal bleeding of the stomach that may be life-threatening. Other symptoms include nausea, vomiting, red, black stools, stomach pain, bloating, etc. Gastrointestinal endoscopy, CT scans, or upper Gastrointestinal Tests are usually done to diagnose the infection.

The treatment may include the use of medicines that kill the bacteria, reduces the HCl in the stomach, and prohibit HCl secretion. Antibiotics like amoxicillin, tetracycline, metronidazole, etc can be used to kill the bacteria. Omeprazole, esomeprazole, pantoprazole, etc can be used to reduce the amount of HCl. Cimetidine, Zantac 360, etc can be used to block histamine that triggers the stomach to release HCl.

The nurse when administering omeprazole with an antibiotic aims reduce the amount of HCl in the stomach as well as to kill the bacteria that causes the H. Pylori infection in the stomach.

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Answer:

An area with an uneven distribution of food, water, moisture, temperature, or other resources can cause clumped dispersion. This pattern can also be caused by the formation of social groups based on protection or hunting. In plants, clumped dispersion is common when offspring fail to disperse from parent plants.

Answer:

Temperature, pressure, volume and more

Answer:

a

Explanation:

my reason is that the capacity carrying is 35

Answer:

\(\boxed{\mathrm{A. \: I \ only}}\)

Explanation:

The graph does not mention any seasons. The graph is not growing geometrically. For about 9 months the population has been about 35.

Here are terms and functions of the pig circulatory system:

The circulatory system of a pig is similar to that of a human. It is made up of the heart, blood vessels, and blood. The heart is a muscular organ that pumps blood throughout the body. The blood vessels are tubes that carry blood to and from the heart. The blood is a fluid that contains red blood cells, white blood cells, and platelets.

During a pig dissection, the circulatory system consists of various structures that play essential roles in the transportation of oxygen, nutrients, and waste throughout the body.

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Mitosis and meiosis are both types of cell division. Mitosis is the process by which most cells in the body divide, it involves a single round of cell division and produces two identical diploid daughter cells.

Meiosis is the process by which gametes are produced. Mitosis helps in the development of an organism. In unicellular organisms, mitosis is the process of asexual reproduction. Mitosis helps in the replacement of damaged tissues. Cells close to damaged cells begin mitosis when they do not detect neighboring cells. Dividing cells catch up with each other and cover damaged cells. Meiosis is the process by which gametes are produced. Meiosis involves two rounds of cell division and produces four non-identical haploid daughter cells. Mitosis and meiosis are both types of cell division.

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Genes are located on many chromosomes. In other words, a particular section of the genome is located on each chromosome.

The primary function of the chromosomes is to transfer DNA, the fundamental component of genetic material. The genetic instructions for numerous biological functions are encoded in DNA.

Chromosomes, which resemble threads, are located in the nucleus of both animal and plant cells. Protein and a single molecule of deoxyribonucleic acid make up each chromosome (DNA).

These processes are necessary for the development, maintenance, and procreation of the organisms. Proteins like histones, which protect the chromosomes.

Therefore, DNA is passed down from parents to children and contains the precise instructions that give each sort of living thing its individuality.

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Answer:

Currents originating in low latitudes near the equator tend to carry warmer water. Currents originating in high latitudes near the north or south pole tend to carry colder water.

Explanation:

Brainiest please

Answer:

All are macromolecules/polymers, have monomers (though different kinds), and help perform bodily functions.

Advanced Biology answer: All are macromolecules with functional groups that  make them function uniquely from each other. Their monomers all have a complex of bonds and atoms that give them shape, helping function.

Answer:

Aerobic respiration occurs in the steps:

Glycolysis--> respiration-->  ETC

(see images for flow chart)

Explanation:

The mitochondria inside the cell's cytoplasm is an organelle. It consists of a gel-like material comprising an outer membrane, an inner membrane, and a matrix. In mitochondria, cells break down sugars in the form of glucose during aerobic respiration, in the presence of oxygen...

This occurs via glycolysis, the Kreb's cyle, and the electron transport chain (ETC)

C6H12O6 (glucose) + 6 O2 → 6 CO2 + 6 H2O + ≅38 ATP

   glucose + oxygen            →  carbon dioxide+ water+ energy

Sexual reproduction requires haploid cells (gametes). When the gametes combine during fertilization, the progency's chromosomal number is restored.

When an organism's cells only have one set of chromosomes, the organism is said to be haploid. All organisms that reproduce sexually are diploid (having two sets of chromosomes, one from each parent). Only the egg and sperm cells in humans are haploid.

Meiosis, a specific type of cell division where the genetic material of the parent cell is broken up twice, is how the egg and sperm cells are created in humans. As a result, these haploid cells have just one set of chromosomes. The genetic material is united in the zygote cell that results from sperm fertilizing an egg. In other words, two distinct haploid cells with one set of chromosomes each combine to form a single diploid cell with two sets of chromosomes.

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Answer:

A. They include a set number of steps to follow in order

Clomifene is a drug used as a fertility drug to stimulate ovulation, the release of eggs. It works by blocking the action of oestrogen's negative feedback on LH. Therefore more LH is released in a surge.

Fertility drugs contain FSH and LH to artificially alter the menstrual cycle and increase the chance of pregnancy. The FSH stimulates eggs to mature in the ovary and the LH encourages ovulation to occur.

Gonadotropin medications include human menopausal gonadotropin or hMG and FSH. Another gonadotropin, human chorionic gonadotropin, is used to mature the eggs and trigger their release at the time of ovulation.

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Type of operon:

Trp operon is a repressible operon

Lac operon is an inducible operon.

Environment:

Trp operon is deactivated when tryptophan is present in the environment.

Lac operon is activated when lactose is present in the environment.

Repressor protein:

Trp operon is activated by tryptophan through bonding to the repressor protein

Lac operon is inactivated by lactose through binding to the repressor protein.

Transcription:

Trp operon -Tryptophan binds to the repressor protein, activating it, thus preventing active transcription of Trp operon.

Lac operon - Lactose binds to the repressor protein, deactivating it, thus allowing for active transcription of Lac operon.

An operon is a unit of DNA found in prokaryotes, containing a cluster of genes under the control of a single promoter and which performs a specific function. Examples of operons are the tryptophan (Trp) and lactose (Lac) operons.

Trp operon is responsible for tryptophan synthesis while Lac operon is  responsible for lactose transportation and metabolism.

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Answer:

answer below

Explanation:

straight from edmentum

Answer:a forest of birds, insects, and squirrels

Explanation: A community consists of only biotic (living) factors with multiple different populations (different groups of animals)

Answer:

3rd

Explanation:

pepsin cannot possibly catalyze a reaction for a molecule it has not been shaped to do for.

The brain processes sensory information and generates reactions to objects, based on past experiences, learning, and expectations.

Different areas of the brain are specialized for processing information from different senses. Factors such as attention, motivation, and context can also impact reactions. For example, fear circuits might activate in response to a snake, while startle circuits might trigger in response to a loud noise.

Understanding these processes can help explain how and why people react to certain objects in their environment and can inform treatments for disorders affecting sensory processing and perception. Furthermore, the brain's involvement with the senses is not just limited to generating reactions to external stimuli. It also plays a critical role in modulating sensory input to optimize behavior and perception.

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If I could make a change in West Virginia,  the law will be in regards of arms possession by civilians.

West Virginia is  known to be a state that gives room for open carry without a permit. If a person is at least 18 years old and has a legal right to possess a handgun under state and federal law, they are permitted to carry a firearm openly without a license. There are some places that are off-limits, such courts and schools.

It is a society that recognizes the right to carry a concealed weapon within the state without first acquiring a concealed handgun license. This law may seems okay for some people, but its negative implications outweigh its advantages.

With the high rise in gun violence, there is therefore the need to amend this law.  The Second Amendment does not protect concealed carry of arms, according to opponents of the practice, who also contend that police personnel with the appropriate training should be in charge of ensuring the protection of the public.

Therefore, i believe a total ban should me place on civilians carrying fire arms so as to protect the people from harm.

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Answer:

the mutation changes one codon for an amino acid into another codon for that same amino acid. ... Silent substitutions never alter the amino acid sequence of the polypeptide chain. The severity of the effect of missense and nonsense mutations on the polypeptide will differ on a case-by-case basis.

Answer: It is D variations of the same species

Explanation:

B). Costimulatory molecules play an important role in the activation of T cells. When an antigen binds to a T cell receptor, it sends an activation signal to the T cell. However, this signal is not enough to fully activate the T cell. The costimulatory molecule provides a second signal to fully activate the T cell.

There are different costimulatory molecules for T1-2 antigens. The costimulatory molecule that provides the costimulatory signal for T1-2 antigens is extensive receptor cross-linking. This is a type of signal that occurs when a large number of antigens bind to the T cell receptors at the same time. This signal helps to ensure that the T cell is activated only when there is a high level of antigen present.

Perforin is a protein that forms pores in membranes. It is released by cytotoxic T cells and natural killer cells as part of the immune response. Perforin helps to destroy cells that have been infected by viruses or other intracellular pathogens. It does this by creating pores in the cell membrane, which causes the cell to lose its structural integrity and die.  

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All the possible allele combinations from the gametes of an organism with the genotype AaBb would be AB, Ab, aB, and ab.

The allele combination for a dihybrid genotype would be a simple cross of the two alleles for the two genes.

In this case, the two genes are Aa and Bb

                    Aa    x    Bb

                AB   Ab   aB   ab

Thus, the gametes would have the alleles AB, Ab, aB, and ab.

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Answer:

Explanation:

It is transpiration but seeing as it isn't in the options the closest i can think of is osmosis though it doesn't sound right but sorry if its wrong