Is it made of----------?

Answer:

A: 6

Explanation:

405001 does contain zeros, which can make it confusing when trying to figure out how many significant figures there are. However, since the zeros are on the inside of the number, they are counted as "significant".

For example,

19205 contains 5 significant figures while 50,000 contains 1 significant figure.

Answer:

D

Explanation:

Among biomolecules, nucleic acids, namely DNA and RNA, have the unique function of storing an organism's genetic code—the sequence of nucleotides that determines the amino acid sequence of proteins, which are of critical importance to life on Earth.

Answer:

D. Nucleic Acids

Explanation:

also what the guy said in comment section

Answer:

B

Explanation:

The number of years passes before the amount of 8 kg of plutonium-239 will reduce to 1 kg is equal to 72900 years.

The half-life period of the radioactive element can be described as the time required to reduce its original amount to half after disintegration.

Given, the original amount of plutonium-239 (N₀) = 8 kg

The amount remaining after disintegration (N) = 1 kg

Consider that 'n' is the number of half-lives.

N ×2ⁿ = N₀

1 ×2ⁿ = 8

2ⁿ =8

2ⁿ = 2³

n = 3

Now, the number of half-lives (n) of plutonium-239 = 3

Half-life of plutonium-239 (t½) = 24300 years

t = n ×t½

t = 3 ×24300

t = 72900 years

Therefore, 8Kg of plutonium-239 will take 72900 years to reduce to 1 kg.

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In systemic circulation, a drop of blood that is rich in oxygen in the left atrium will first travel through the bicuspid valve to reach the left ventricle. From there it will be pumped through the aortic semilunar valve to reach the aorta which will branch into arterioles.

The blood exiting the capillaries is poor in oxygen and will first travel in venules, which will fuse into bigger veins. Eventually the blood will enter into the right ventricule via either superior vena cava or inferior vena cava.

This involves blood vessels supplying oxygenated blood to and returning deoxygenated blood from the tissues of the body.

The appropriate processes and steps can be seen above.

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The biosphere contains all of the planet's living things, including microorganisms , plants, and animals.

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Answer:

helium

Explanation:

The number of protons is the atomic number, and the number of protons plus neutrons is the atomic mass. For hydrogen, the atomic mass is 1 because there is one proton and no neutrons. For helium, it is 4: two protons and two neutrons.

Hope this helps.

Helium is an element that contain 2 protons, 1 neutron and 2 electrons.

Helium having two valence electrons and the electronic configuration 1s 2, the helium atom does not establish a chemical bond because it is a noble gas, hence its duplet is complete. Valency is therefore 0 (zero).

A noble gas or inert gas is helium. Due to having the most valence electrons that their outer shell or valence shell can support, noble or inert elements are the most stable. Because of its extremely stable structure, helium has no tendency to establish any chemical bonds.

Therefore, Helium is an element contain 2 protons, 1 neutron and 2 electrons.

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Organized patterns, irrigation systems, specific crop varieties, and agricultural practices indicate human intervention in vegetation growth, suggesting farming activity.

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Answer:

Urethra

Explanation:

I'm pretty sure it would be the urethra but if it's not let me know.

The urethra is a small thin-walled tube which leads from the floor of the urinary bladder to the outside of the body.

Human excretory system includes organs that facilitate the removal of nitrogenous wastes out from the body. The main excretory organs in the human body include kidney, ureter, urinary bladder and urethra. Kidneys are the organs which filter blood and urine is the filtrate obtained that is excreted out of the body.

The urethra is the small thin-walled tube that lets urine leave from bladder and the body. In the males, urethra passes through the prostate gland. In the females, the urethra is much shorter. It runs from the bladder to open in front of the vagina.

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1-4 straight chain alkanes, also known as n-alkanes, undergo various types of chemical reactions, depending on the conditions and reactants involved.

Some of the common reactions that 1-4 straight chain alkanes can undergo:

Combustion: Alkanes can burn in the presence of oxygen to form carbon dioxide and water, releasing heat and energy.

Halogenation: Alkanes can react with halogens such as chlorine or bromine to form alkyl halides. This reaction usually requires the presence of a catalyst or UV light.

Nitration: Alkanes can react with nitric acid and sulfuric acid to form nitroalkanes. This reaction is also called nitration of alkanes.

Isomerization: Alkanes can undergo isomerization, where the position of the carbon-carbon bonds in the molecule is rearranged.

Cracking: Alkanes can be cracked, which means they are broken down into smaller molecules.

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Answer:

In the Digestive tract, the mouth is first on the list. This is where Mechanical digestion takes place. Teeth crush, grind, break, shred, and mash food into small pieces that are easy to swallow and digest. Saliva is an enzyme that starts to break carbohydrates if any. That's why the mouth also performs Chemical Digestion. Once the food is ready to be swallowed, it is pushed into the Pharynx and into the esophagus. The esophagus squeezes food with rhythmic muscle contractions-this is called Peristalsis. We have traveled in 3 out of the 8 organs in the digestive tract.

Explanation:

The genotype of the F1 offspring is YyTt, and the phenotype is yellow and tall. The probability of each phenotype in the F1 offspring is as follows yellow and tall is 1/2 or 50%, green and short is 1/2 or 50%.

Genotype refers to the genetic makeup or combination of alleles present in an organism, while phenotype refers to the observable traits or characteristics expressed by an organism. Genotype represents the genes an organism carries, while phenotype represents the physical or observable features resulting from the interaction between genotype and the environment.

When a heterozygous ail yellow plant (genotype Yy) is crossed with a homozygous short green plant (genotype tt), the F1 offspring will have the genotype YyTt and the phenotype of yellow and tall. The probability of this phenotype occurring in the F1 generation is 50%. Additionally, there is a 50% probability of the F1 offspring having the phenotype of green and short.

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Atoms from various elements are chemically combined in a fixed ratio to form a compound. A mixture is a concoction of two or more different things.

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The energy is related to the change of state represented by the model by: D. Atoms lose energy as a gas changes to a liquid.

A model of the transition from a gas to a liquid is shown in the accompanying image. It demonstrates how atoms or molecules change from being widely scattered as in a gas to being concentrated as in a liquid.

The atoms in this process move from a higher-energy state  to a lower-energy state releasing or losing energy in the process. The most common kind of energy loss is heat.

Therefore the correct option is d.

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In a balanced aquatic ecosystem, phytoplanktons should have the greatest population.

A balanced ecosystem is an ecosystem that has the right mix of living organisms across all the trophic levels in the ecosystem.

The different trophic levels in an ecosystem include:

Having the appropriate population at each trophic level will ensure that the ecosystem is balanced.

In a balanced ecosystem, the lower the trophic level, the more the population of organisms, and vice versa.

This means that producers which form the basis of every ecosystem should have the highest population.

Thus, in a balanced aquatic ecosystem, the producers should have the greatest population. Phytoplanktons are producers.

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Answer:

D

Explanation:

The ribosome is a cellular organelle that plays a crucial role in protein synthesis, using information from the cell's DNA and messenger RNA (mRNA) to assemble the appropriate sequence of amino acids into a protein. This process is known as translation.

The populations that were hurt by adding bears were the populations of smaller animals such as rabbits, rodents, and other small mammals.

What do you mean by mammals?

Mammals are a group of vertebrate animals that are characterized by the possession of hair or fur, mammary glands that produce milk to feed their young, and three middle ear bones. They are warm-blooded and give birth to live young rather than laying eggs. Examples of mammals include humans, cats, dogs, horses, and whales.

The mentioned smaller animals are a primary food source for bears, so by increasing the bear population, the populations of these animals would be reduced.

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Flowing water kinetic energy electricity - describes the correct order of energy conversions necessary to form electricity from a hydroelectric dam

One of the main parts of a hydroelectric facility is a hydroelectric dam that produces electricity. A hydroelectric dam is a substantial, artificial structure created to hold back a body of water. In addition to being built to generate hydroelectric electricity, hydroelectric dams are also built to manage flooding and river flow.

The water intake is located quite close to the base of the hydroelectric dam wall. It drops through the penstock inside the hydroelectric dam because to gravity. A turbine propellor, which is rotated by the flowing water, is located at the end of the penstock. The turbine's shaft ascends into the generator, which generates the energy.

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Option C: Flowing water → Kinetic → Electricity

Cyanosis is a medical condition that is characterized by a blue or purple discoloration of the skin and mucous membranes. It occurs due to a lack of oxygen in the blood or a buildup of deoxygenated hemoglobin in the blood vessels near the skin surface.

Several physical and/or chemical factors that might create cyanosis in a patient include lung diseases that interfere with the normal exchange of oxygen and carbon dioxide in the lungs, such as chronic obstructive pulmonary disease (COPD), pneumonia, and asthma. Heart diseases, such as congenital heart disease, heart failure, and pulmonary embolism, can also lead to cyanosis. Other factors include high altitudes, exposure to cold temperatures, and certain medications, such as opioid painkillers.

To reverse cyanosis, the underlying cause must be treated. For example, oxygen therapy can be used to increase oxygen levels in the blood in patients with lung diseases. In cases of heart disease, medications or surgery may be necessary to improve the heart's ability to pump blood. In some cases, blood transfusions may be necessary to increase the oxygen-carrying capacity of the blood.

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The monomers, examples, location and linkage of the biomolecules can be found below;

Biomolecules are molecules, such as amino acids, sugars, nucleic acids, proteins, polysaccharides, DNA, and RNA, that occur naturally in living organisms.

Nucleic acids are any acidic, chainlike biological macromolecule consisting of multiple repeat units of phosphoric acid, sugar and purine and pyrimidine bases.

Proteins are a complex naturally-produced molecules composed of one or more long chains of amino acids, in which the amino acid groups are held together by peptide bonds.

A glycosidic bond or glycosidic linkage is a type of covalent bond that joins a carbohydrate (sugar) molecule to another group, which may or may not be another carbohydrate.

Lipids are any of a group of organic compounds including the fats, oils, waxes, sterols, and triglycerides.

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The structure that caused rotifers to be called wheel animals or wheel bearers is the corona.

Rotifers are also known as wheel animals or wheel bearers because of the corona structure around their mouth region.

Some rotifers are sessile and live inside tubes or gelatinous holdfasts that are attached to a substrate. Other rotifers migrate around a substrate through inch worming.

This is because when corona is seen in a sequential coordinated movement, it resembles the structure of a wheel, although it does not rotate in reality.

Therefore, we conclude that rotifers are called wheel animals or wheel bearers due to the presence of the corona structure.

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Answer:

⬇ See answer below ⬇

Explanation:

A fish is a(n) aquatic animal which has gills and can only find oxygen underwater. Toads are quite different though as they are amphibians who can live on both land and underwater. (Hope this helped you!)

Answer:

F.... is that even a question?

Answer:

At the end of one cell cycle, a cell with 10 chromosomes will divide into two daughter cells, each with 10 chromosomes.

After 2 cell cycles:

One cell divides into two, so there are now 2 cells.

Each of those two cells divide into two, so there are now 4 cells.

Each of those four cells divide into two, so there are now 8 cells.

After 3 cell cycles:

One cell divides into two, so there are now 16 cells.

Each of those 16 cells divide into two, so there are now 32 cells.

Each of those 32 cells divide into two, so there are now 64 cells.

So at the end of 3 cell cycles, there are 64 daughter cells.

Each daughter cell will have 10 chromosomes, since the number of chromosomes did not change during the cell cycles.

Explanation:

The statement that would correctly explains the weight you would experience on each planet is You would weigh less on planet A because it has less mass than planet B. Option D

Weight is the force experienced by an object or person due to gravity. Since it is as a result of gravitational force, it depnds on both the mass of the objct or person and the level of gravity of the planet.

Gravity is dependent on th mass of the planet, and if planet A has lesser the mass of planet B, its gravitational force will be most likly be weaker.

This therefore means a person is going to weigh less on planet A than on planet B, even though both planets have the same size.

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A useful scientific name must have two characteristics are genus and species.

The art and science of categorization is known as taxonomy. A taxonomy is a system of classification, particularly a hierarchical classification, that groups various categories of objects together.

A scientific name can be described as a formal system that is commonly used for naming species of living creatures.

In science, this formal method is sometimes referred to as binomial nomenclature, binominal nomenclature, or binary nomenclature.

In Science, the term "species" simply refers to a biological classification of related organisms that have similar appearances or traits and may reproduce.

In this situation, we can logically and rationally assume that Genus and Species are the two essential qualities that all effective scientific names must possess.

Thus, genus and species are the two main parts of a scientific name.

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Answer : B

because that statement is wrong.

Answer:

Chlorophyll

Explanation:

because they lack roots, stems, and leaves.

The component that can be found in non-vascular plants is chlorophyll. The correct option is C.

Chlorophyll is a pigment that gives plants their distinctive green colour and aids in photosynthesis, which enables plants to produce their own food.

Plants (including algae) can photosynthesize, or use sunshine to change simple molecules into organic compounds.

Chlorophyll makes this possible. The most common kind of chlorophyll found in algae and green plants is chlorophyll a.

Plants lacking a circulatory system made up of xylem and phloem are referred to as non-vascular plants. They may instead have more basic tissues with tailored capabilities for the internal transfer of water.

Mosses, hornworts, and liverworts are examples of nonvascular plants. They don't have leaves, stems, or roots.

Nonvascular plants require a damp environment, are low-growing, and reproduce using spores.

Thus, the correct option is C.

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