ABCDEFGHIJKLMNOPWRSTUVWXYZ

Answer:

30

Explanation:

4,470,000,000 is 4.47 billion years

half-life of uranium-238 is 4.468 billion years

60 divided by 2 is 30

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After approximately 4,470,000,000 years, there would be approximately 30 uranium-238 atoms remaining from the initial 60 atoms as half-life of uranium-238 is approximately 4.5 billion years.

To calculate the number of remaining uranium-238 atoms after a given time,

N = N0 × [tex](1/2)^(^t^ /^ T^)[/tex]

Where: N = Number of remaining atoms N0 = Initial number of atoms t = Time that has elapsed T = Half-life of the substance

In this case, N0 (initial number of atoms) is given as 60, T (half-life of uranium-238) is 4.5 billion years, and t (time elapsed) is 4,470,000,000 years.

Let's plug these values into the formula:

N = 60 ×[tex](1/2)^(^4^,^4^7^0^,^0^0^0,^0^0^0^/^4,^5^0^0^,^0^0^0,^0^0^0^)[/tex]

Calculating this,

N ≈ 60× [tex](1/2)^0^.^9^9^3^3[/tex]

N ≈ 60 × 0.5005

N ≈ 30.03

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Phospholipids compose the cell membrane, arranged as a bilayer. Their heads can be in contact with water. Their tails are against each other in the interior of the membrane. Structure D represents the lipidic bilayer.

The cell membrane is composed of a lipidic bilayer, cholesterol, proteins, and glucans incrusted in between.

Lipidic bilayer

The lipidic bilayer is composed of phospholipids.

Phospholipids are amphipathic molecules with hydrophilic heads and hydrophobic tails.

Cholesterol

These molecules are incrusted in the membrane between the hydrophobic tails of lipids.

Proteins

Carbohydrates

Carbohydrates associate with lipids and proteins to compose glycolipids and glycoproteins.

They are mostly located in the external lipidic monolayer, facing the cell exterior.

In the image, structure D is representing the lipidic bilayer.

We can identify

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Answer:

All rivers and streams start at some high point. The high point can be a mountain, hill, or other elevated area. Water from some source like a spring.

Answer: (1) The pupil of an eye decreases in size in bright light.

Explanation: When the light hits the eye, it stimulates the pupil to contract.

The graph shows the projected increase in the world population and the projected changes in the populations of individual continents: (A) Earth's population will increase quickly because the graph is between millions of people and world population growth.

Any whole group that shares at least one trait is referred to be a population. Populations are more than simply individuals. Populations may include—but are not restricted to—people, animals, organizations, structures, houses of worship, automobiles, farms, and other things or occasions.

Rapid population growth makes it more difficult for low- and lower-middle-income nations to finance the per capita rise in public spending required to eradicate poverty, end hunger and malnutrition, and assure universal access to health care, education, and other important services.

The current world population of 7.6 billion is expected to reach 8.6 billion in 2030, and 9.8 billion in 2050 according to the UN.

Thus, we can conclude that the earth's population will increase quickly.

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Answer:

It contributes to the structure and function because it is a thin membrane that surrounds the cell and controls what goes in and out of it.

Explanation:

If you are to discover a new species, the characteristics of the species that need to be included in each of the kingdoms include the following below:

This is referred to as a taxonomic rank that is composed of smaller groups called phyla.

They have their unique properties which is checked before the organisms are grouped under any of them. An example is kingdom animalia which is  eukaryotic, multicellular, and has no cell wall.

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Organisms capable of sexual reproduction are diploid. Humans only have haploid cells in the egg and sperm.

Reproduction is defined as the process by which new organisms (offspring) of the same sort are created. It contributes to evolution by generating variants through genetic recombination. The ecosystem's species diversity is aided by it.

Two complete sets (2n) of chromosomes are present in diploid cells. A haploid cell only has one complete pair of chromosomes and has half as many chromosomes (n) as a diploid cell.

Thus, organisms capable of sexual reproduction are diploid. Humans only have haploid cells in the egg and sperm.

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The antelope population has a negative population growth rate. So, the birth rate + immigration rate of the population will be less than the death rate and emigration rate. Thus, the correct option is C.

Population growth rate is the increase or decrease in the number of individuals in a population or a dispersed group. Population growth depends upon several factors which include:

1. Birth rate: It is the total number of new births in a population. It increases the population growth.

2. Death rate: It is the total number of deaths in a population. It decreases the population growth.

3. Immigration: It is the entry of new individuals through migration into a population. It increases the population growth.

4. Emigration: It is the removal or migration of individuals from a population. It decreases the population growth.

Thus, a population with negative population growth rate will have birth rate and immigration less than the death rate and emigration rate.

Therefore, the correct option is C.

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Answer:

Explanation:

Differentiation dramatically changes a cell's size, shape, membrane potential, metabolic activity, and responsiveness to signals. These changes are largely due to highly controlled modifications in gene expression and are the study of epigenetics.

The three events that occur as an unspecialized cell differentiates into a cell that helps transport water in plants are as follows:

Cell differentiation may be defined as the process during which young, immature (unspecialized) cells take on individual characteristics and reach their mature (specialized) form and function.

In order for a cell to differentiate into its specialized form and function, it need only to manipulate those genes (and thus those proteins) that will be expressed, and not those that will remain silent. The primary mechanism by which genes are turned “on” or “off” is through transcription factors.

Therefore, the three events that occur as an unspecialized cell differentiates into a cell that helps transport water in plants are well-described above.

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Answer: Probably

Explanation: Use the ashes and ask someone to turn it into. It probably will cost alot

Explanation:

Ans: D

by counting the no of electrons in the diagram we have 18 negatively charged particles (electrons)

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Atoms have negatively charged electrons. An atom's electrons balance the nucleus' protons' positive charge. By counting the red dots, we can say that there's total 18 electrons.

An atom is a subatomic particle of matter that serves as the fundamental unit of definition for each individual chemical element. Atoms are made up of a positively charged nucleus in the center that is surrounded by one or more electrons that have a negative charge. The nucleus has a positive electric charge and may house one or more relatively massive particles called protons and neutrons.

The positive charge that is carried by the protons in the nucleus of an atom is countered by the negative charge that is carried by all of the atom's electrons working together.

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The correct strand of RNA bases is UGGCUCGAA. Therefore, the correct option is B.

RNA is a nucleic acid that is composed of nucleotides. A nucleotide is composed of a sugar molecule, a phosphate group, and a nitrogenous base. RNA differs from DNA in its single-stranded structure, the presence of uracil instead of thymine, and the sugar molecule being ribose.

The sequence of bases determines the genetic information in RNA. The bases in RNA are adenine, cytosine, guanine, and uracil. The sequence UGGCUCGAA represents an RNA sequence of bases.

The sequence UGGCUCGAA transfers the genetic information from the DNA to ribosomes, where the sequence is translated by ribosomes into amino acids, which results in the formation of a specific protein with a unique function in the cell.

Therefore, the correct strand of RNA bases is UGGCUCGAA.

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The digestion of starch carbohydrate is initiated in mouth due to the action of starch digesting enzyme ptyalin or salivary amylase present in saliva secreted by salivary glands. Enzymatic hydrolysis helps in the partial breakdown of starch (polysaccharide) into maltose and isomaltose (disaccharides) and small dextrins called 'limit' dextrins. Nearly 30% of the starch is hydrolysed in the oral cavity because of the shorter time the food is retained here

due to the action of starch the carbohydrate digestion occurs first in mouth

The reaction satisfies the Law of Conservation of Matter because the number of each type of atom is the same in the products and reactants.

The above given statement is true.

What is the "Law of Conservation of Matter"?

The "Law of Conservation of Matter" states that "matter can neither be created nor be destroyed". In other words, the total mass of an isolated system remains constant over time, as mass is neither created nor destroyed. This law applies to all types of matter, including atoms, molecules, and energy.

What are Atoms?

Atoms are basically the basic building blocks of matter. They are composed of protons, neutrons, and electrons and are the smallest particle of an element that still retains the properties of that element. Atoms are the fundamental units of chemistry and form the basis of all matter in the universe.

Therefore the option that is true is Option B.

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A common misconception of evolution is that it is when apes stood up and developed into humans (option D).

Evolution is the transformation of animals, plants and other living things into different forms (now understood as a change in genetic composition) by the accumulation of changes over successive generations.

The theory of evolution is based on the idea that all species are related and gradually change over time.

Charles Darwin, who developed evolution, proposed a theory which states that evolution happens by natural selection. Darwin published his theory of evolution in the origin of species where he presented evidence to support this theory that all life on earth evolved from a common ancestor.

Therefore, option D is a misconception of evolution.

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The one limitation of using a greenhouse as a model to represent a large farm is that a greenhouse is not exposed to the same weather patterns as a large farm. Thus, the correct option is B.

A greenhouse is a building with the glass walls and a glass roof. Greenhouses are the models which are used to grow plants, such as tomatoes and tropical flowers in a specific weather condition.

A greenhouse stays warm inside, even during the winter time. In the daytime, sunlight shines into the greenhouse and warms the plants and air that are present inside. A greenhouse helps in creating a microclimate that controls the temperature and humidity we want to expose the plants to.

Therefore, the correct option is B.

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Your question is incomplete, most probably the complete question is:

What might be one limitation of using a greenhouse as a model to represent a large farm?

A. A greenhouse is a controlled environment, and a large farm is not.

B. A greenhouse is not exposed to the same weather patterns as a large farm.

C. A greenhouse has a water system that can be controlled by the farmer

D. A greenhouse has more pests than a large farm.

Answer:

no

Explanation:

all oxegyn going through your body gets there from your blood flow

Answer:

1. Clostridium Botulinum can only grow in the absence of oxygen.

2. Clostridium Botulinum grows and produces toxins in food prior to consumption.

Answer: A. The molecules of the colored substance move randomly through the water, with the majority moving from an area of high concentration to an area of low concentration.

Explanation: When a substance is dissolved in water or any other substance, the molecules will move to an area they have not. When food coloring is placed in water, it moves to areas it hasn't touched because it has to expand.

The Galápagos Islands have a distinctive island ecosystem because of environmental factors. Despite being close to the equator, the Galápagos Islands benefit from cool ocean currents.

The highest point in the Galapagos Islands, Wolf Volcano, is situated on Isabela Island. The mountain has a 5,600-foot peak (1,707 meters). It is named for a German geologist from the 19th century and is a shield volcano as well.

The steep mountainous terrain of the Galápagos Islands was shaped by several volcanic eruptions. Most people recognize the Galápagos for their wide variety of plant and animal species. Numerous species are endemic, which implies they can only be found in certain specific areas.

Being on the equator, the climate in the Galapagos Islands does not change significantly throughout the year. The Islands' climate is most appropriately categorized as subtropical. 

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Answer: Because whale swims and femur is not required in this.

Explanation:

Sometimes, parts of the body that were useful to our ancestors no longer are in our bodies. These structures, like the pelvis and femur in whales, are proof that natural selection over time allowed us to evolve from ancestors who possessed different characteristics.

Whales' femur and pelvis are regarded as vestigial structures. These buildings were passed down from relatives who used them, but they are no longer in use. Animals that once walked on land have given rise to whales.

For this reason, their forebears need a pelvis and femur bones. Whales have these structures today, but they did not develop the ability to swim, despite the fact that they do.

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Mitosis may be defined as a type of cell division in which a parental cell is divided into two daughter cells that are genetically identical to them. These daughter cells are diploid in nature. Somatic cells of the body undergo this process of cell division.

Meiosis may be defined as a type of cell division in which a parental cell is divided into four daughter cells that are genetically unique to them. These daughter cells are haploid in nature.  Germ cells (gamete cells) of the body undergo this process of cell division.

Therefore, the comparison of mitosis and meiosis in the following attributes is well described above.

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The statement which represents a negative effect of genetic drift is that it involves the loss of diversity within a population. Thus, the correct option for this question is C.

Genetic drift may be defined as a type of non-directional and random fluctuation in which allele frequencies of a population may change over generations due to chance or sampling errors. It takes place in all populations of non-infinite size.

This type of evolutionary force arises through a genetic bottleneck which develops when a population undergoes a drastic reduction in population size. So, the loss of genotypes of diversity within the population is one of the major negative effects of genetic drift.

Therefore, the correct option for this question is C.

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The statement Mendelian inheritance concerns the genetic traits of domesticated plants and animals, while non-Mendelian inheritance concerns human genetic traits is true (Option C).

Gregor Mendel was a Hungarian botanist who performed different crosses between pure lines of pea plants, which led him to develop a series of hypotheses that are nowadays laws in the genetic field.

Therefore, with this data, we can see that Gregor Mendel discovered several inheritance laws by working with pea plants and these discoveries can be applied to plant genetics, animal genetics and also to humans.

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Answer:

but,

Answer:

Carbon gets removed by a number of 65 GtC each year from the ocean and land plants.

Explanation: