someone come help me before i loose my braincells

Answer:

Explanation:

A chromosome is an organized structure of DNA and protein that is found in cells. ... The relative order of base pairs, whether in a DNA fragment, gene, ... Mature male or female reproductive cell (sperm or ovum) with a haploid set of ... (C) are found in both DNA and RNA, thymine (T) is found (primarily) in DNA and uracil (U) ...

Answer:

The Sun's rays warm our world, stir air and ocean currents, and catalyze chemical reactions in the atmosphere. The Sun-warmed surface evaporates water to form rain clouds that redistribute fresh water around the world. And sunlight is essential for most life forms that live at Earth's surface.

Explanation:

Answer:

No,mercury can't diffuse in our body using simple diffusion.

Explanation:

It is only slowly absorbed through the skin, although it may cause skin and eye irritation. Elemental mercury droplets may be absorbed through eye contact. Ingestion is not an important route of acute exposure as almost no elemental mercury is absorbed through the gastrointestinal tract.

Answer:

The large intestine

Explanation:

The large intestine absorbs water from undigested food material, helping in the reabsorption of water and electrolytes before the waste is eliminated from the body.

C. "connect the brain to spinal cord"

hope this helps

The digestive process is divided into four steps: ingestion, chemical and mechanical food breakdown, nutrient absorption, and expulsion of indigestible food.

What does the digestive process entail?

The digestive process starts as soon as something is chewed. In order for food to pass more easily through your esophagus and into your stomach, saliva, a digestive juice produced by your salivary glands, moistens the food. The carbs in food also begin to be broken down by an enzyme found in saliva.

Motility, digestion, absorption, and secretion are the four fundamental functions of the digestive system. Our digestive system transforms our food into energy that we can use.

The digestive system's initial function is to take in food through the mouth. The "ingesting" procedure must take place before anything else can happen.

The complete question is:

Some students were building a model of a digestive system. Which choice best describes a process they should show with their model?

a) F Tissues digest food for the organ system to absorb.

b) G Cells digest food, which is then absorbed by organs.

c) Organs digest food by working together as a system.

d) The organ system uses specialized cells to digest food.

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An environment is the surroundings or conditions in which a person or any living thing lives.

Answer:

The combining form for "pneum/o" is "pneumon/o".

This combining form is derived from the Greek word "pneumon", which means "lung". It is commonly used in medical terms to refer to conditions or procedures related to the lungs. For example, pneumonia is an infection of the lungs, and pneumonectomy is the surgical removal of a lung.

Answer:

ferns, mosses, liverworts, hornworts, lycophytes, and liverworts

Explanation:

Non-flowering plants, known as gymnosperms or conifers, can nonetheless generate seeds.

The shipment of most medical specimens falls into which two hazardous materials class  6 and class 9.

The sorts of organic samples frequent in most medical specimens are serum samples, virology swab samples, biopsy and necropsy tissue, cerebrospinal fluid, whole blood for PCR, and urine samples. these are amassed in particular bins for successful processing inside the laboratory.

A specimen is a sample of something, like a specimen of blood or frame tissue this is taken for medical checking out. The noun specimen comes from the, meaning to appearance. Biologists gather specimens with a purpose to get a better have a look at some thing to observe it.

A specimen is a sample of something, like a specimen of blood or body tissue this is taken for clinical checking out. The noun specimen comes from the meaning Biologists accumulate specimens so they can get a better look at something to have a look at it.

A specimen is a sample of something, like a specimen of blood or body tissue this is taken f

Disclaimer:- your question is incomplete, please see below for complete question.

a. class 2 and class 4

b. class 4 and class 6

c. class 6 and class 9

d. class 2 and class 9

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Answer:

population count

Explanation:

They are talking about the number of crayfish in the pond..Number is your key word.

Chemical contaminants that are frequently found in chemical dangers include toxins, antibiotics, and heavy metals from industrial discharges.

Heavy metals can be found in coal-burning power plants' combustion byproducts, metal piping used in industrial operations, untreated sewage sludge, and traffic. Pollution from toxicants is a significant environmental issue that has posed substantial risks to both agricultural productivity and human health.

Top of the list of environmental toxins harming nature are heavy metals and pesticides. Heavy metal contamination is seen by many as a problem in places with extensive industrial activity. Yet, today it is thought that one of the main sources of heavy metals is through roads and automobiles.

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Answer:

Biological or internal factors such as age,gender, inherited genetic defects,skin types,etc

environmental exposure eg exposure to Radon and UV radiation and fine particulate matter

Answer:

Sedimentary rock.

Explanation:

In aerobic respiration, O2 is the final electron acceptor, whereas in anaerobic respiration another oxidized ion such as NO3 is the final electron acceptor.

The ultimate electron acceptor in aerobic respiration is oxygen, which absorbs electrons and hydrogen ions at the conclusion of the electron transport chain and produces water as a byproduct. Since it produces a lot of ATP, aerobic respiration is the most effective way for cells to make energy.

In contrast, an oxidised ion other than oxygen acts as the ultimate electron acceptor during anaerobic respiration. For instance, nitrate or sulphate may act as the last electron acceptor in certain bacteria, resulting in creation of nitrite or sulphide as a byproduct. This respiration can enable cells to synthesise energy in oxygen absence, but it is less effective than aerobic respiration because it produces less ATP per unit of substrate.

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Complete Question:

In aerobic respiration _________ is the final electron acceptor, whereas in anaerobic respiration another oxidized ion such as ______ is the final electron acceptor.

A)O2; H2O

B)O2; NO3-

C)NO3-; H2O

D)O2; NH3

E)NO3-; O2

The correct explanation is A: The lagging strand cannot be replicated continuously, and ligase is needed to join the fragments.

During DNA replication, the two strands of the DNA double helix are unwound, and each strand serves as a template for the synthesis of a new complementary strand. The leading strand is synthesized continuously in the 5' to 3' direction, while the lagging strand is synthesized discontinuously in small fragments called Okazaki fragments, also in the 5' to 3' direction.

After the synthesis of each Okazaki fragment, the RNA primer that initiated the fragment is removed and replaced with DNA by DNA polymerase. However, there are small gaps between the newly synthesized fragments on the lagging strand. Ligase is required to seal these gaps by catalyzing the formation of phosphodiester bonds between adjacent nucleotides, effectively joining the Okazaki fragments together into a continuous strand.

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Answer:

SKULL

CERVICAL VERTEBRAE

MANUBRI STERNI

BODY OF THE STERNUM

XIPHOID PROCESS

LUMBAR BERTEBRAE

LILUM SACRUM

COCCYX

PUBIS FEMUR

PATELLA

TARSUS

METARSUS

PHALANGES

ORVITAL CAVITY

NASAL CAVITY

CLAVICLE

SHOULDER BLADE

RIB

HUMERUS

ULNA

RADIUS

CARPUS

METACARPUS

PHALANGES

FIBULA

TIBIA

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The original source of electrons for Photosystem II (PSII) is water (\(H_2O\)).

Sunlight energy is used to excite electrons in chlorophyll molecules in PSII during the light-dependent activities of photosynthesis. The reduction of NADP+ to NADPH, a high-energy electron carrier used in the light-independent processes, is the result of these energetic electrons passing through a sequence of electron carriers.

Therefore, fresh electrons must be obtained in order to make up for the electrons lost from PSII. These electrons are produced by the division of water molecules into electrons (\(e^-\)), oxygen gas (\(O_2\)), and hydrogen ions (\(H^+\)). As a consequence of this procedure, known as photolysis or water-splitting, molecular oxygen is released, and it also provides the electrons required to replenish those lost through PSII.

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As per the details given, using probability there are 8 possible combinations of hats, belts, and ties.

You need to know the entire number of possible combinations and the total number of positive outcomes in order to determine the likelihood of a certain arrangement of hats, belts, and ties happening.

You may get the total number of combinations by multiplying the number of options for each item (hats, belts, and ties), as each has two options.

In this instance, you have two hat options (red or black), two belt options (blue or white), and two tie possibilities (DNA or 2n). Consequently, there are the following combinations in all:

2 (options for hat) * 2 (options for belt) * 2 (options for tie) = \(2^3\) = 8

Thus, there are 8 possible combinations of hats, belts, and ties.

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Your question seems incomplete, the probable complete question is:

I have only two hats, a red one and a black one. I have only two belts, a blue one and a white one. I have only two ties, one with a DNA molecule prominently showing on it and the other with 2n prominently showing on it. Every day I wear one hat, one belt and one tie, all chosen at random. How many possible combinations of hats, belts and ties exist?

Answer:

Muscle cells, also known as muscle fibers, undergo several adaptations that enable them to carry out their functions, which include contractions, generating force, and producing movement. Some of these adaptations include:

1. Hypertrophy: an increase in the size of the muscle fibers, which allows for a greater ability to generate force.

2. Increased number of myofibrils: the contractile units within muscle fibers, which increases the overall contractile ability of the muscle.

3. Increased levels of sarcoplasmic and myofibrillar proteins: these proteins are involved in the contraction process, and their increased levels lead to improved muscle function.

4. Increased levels of enzymes and energy-rich molecules: these help to support the high metabolic demands of muscle contraction.

5. Increased number of mitochondria: the powerhouses of the cell, which help to supply energy to the muscle fibers.

6. Increased capillarization: the development of a greater network of blood vessels, which helps to supply the muscle with oxygen and nutrients, and to remove waste products.

These adaptations enable muscle fibers to carry out their functions effectively, and can be achieved through various forms of exercise and physical activity.

The four major drawbacks to using fossil fuels, such as coal and natural gas, in alberta thermal power stations is climate change, not renewable, unsustainable and biological accidents.

Fossil energy is all that comes from the burning of so-called fossil fuels. These fuels are formed by the remains of plant and animal organisms accumulated in the subsoil of our planet.

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Answer:

Corona virus is a respiratory disease that has been recently discovered in late 2019. Ill effects of this disease include fever, dry cough, and tiredness. We can safeguard ourselves from this virus by practicing good hygiene and taking extra precautions, such as washing our hands, avoiding sick people, wearing a mask, and wearing gloves. Foods that boost our immunity are citrus fruits, broccoli, and garlic.

The left side of the heart serves as the main pump, while the right side serves as the pulmonary circulation pump, shunting carbon dioxide-rich blood to the lungs.

The heart is divided into two sides, with each side consisting of an atrium and a ventricle. The left side of the heart pumps oxygen-rich blood to the body, while the right side pumps carbon dioxide-rich blood to the lungs. The right ventricle is responsible for pumping blood to the lungs for gas exchange, where carbon dioxide is removed and oxygen is added. This process is known as pulmonary circulation, and the right side of the heart serves as the pulmonary circulation pump.

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A molecule is the smallest basic unit of a substance that still displays the properties of that substance. Therefore, option C is correct.

Molecules are the smallest particle of a substance that retains their chemical properties. They are made up of two or more atoms that are chemically bonded together. Atoms are the basic building blocks of matter, and they combine in various ways to form different types of molecules.

Molecules can be made up of atoms of the same element, such as diatomic oxygen (O₂) or triatomic ozone (O₃), or they can be made up of different elements, such as water (H₂O), which is composed of hydrogen and oxygen atoms.

Thus, a molecule is the smallest basic unit of a substance that still displays the properties of that substance. Therefore, option C is correct.

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 The correct option is D. Showing the similarities of DNA sequences structures in early stages of development of organisms..

The scientific evidence that supports the theory that many organisms share a common ancestor are: The bone structure of forelimbs in humans and bats are similar in shape and function, and the DNA sequences for the production of hemoglobin, a type of molecule in blood, within humans and chimpanzees are almost identical. Additional evidence can be provided by showing the similarities of anatomical structures in early stages of development of organisms. The similarities in the anatomical structures in the early stages of development of organisms support the idea that they share a common ancestor. This is because different species share common developmental pathways that originate from the same early stages of embryonic development. This means that different species have inherited these developmental pathways from their common ancestor. Hence, similarities in the anatomical structures in the early stages of development of organisms provide additional scientific evidence to support how some organisms share a common ancestor.

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Answer:

Changes in the composition of the atmosphere

Explanation:

Although this answer is very vague and generalized, it is the correct answer.

The increase in greenhouse gas emissions in the atmosphere from modern manufacturing and engineering has increase carbon dioxide and methane concentrations in the upper atmosphere. These gasses have a chemical composition that allows the absorption and release of longwave radiation back to the Earth's surface slowly increasing the global average temperature.