Match each vocabulary word to the correct definition.

Answer:

The Pair Distribution Function (PDF) provides the probability of finding an atom at a distance "r" from a given atom.

Explanation:

Atoms are made up three particles protons, neutrons and electrons. The PDF is the Sine - Fourier transform of the total scattering diffraction pattern.

The Atomic structure pdf is used to find the average and short range structure for disordered crystalline materials, nanomaterials and amorphous materials.

Local Distortions, Chemical short range order, nanomaterial structure and amorphous structures are some of the studies that can be done by pdf technique.

The atomic structure refers to the arrangement of protons, neutrons, and electrons in an atom. The model proposed by Ernest Rutherford and the use of tools like a scanning tunneling microscope contribute to our understanding of this theory.

The atomic structure refers to the arrangement of protons, neutrons, and electrons within atoms. In 1938, Ernest Rutherford made valuable contributions to the development of the atomic structure theory. The atomic structure can be studied even further with tools like a scanning tunneling microscope, which can provide an image of surfaces down to the atomic level, like the surface of graphite, with atoms arranged in hexagons.

Rutherford's work was groundbreaking and formed the basis for much of our modern understanding of the atom. His model proposed that atoms consist of a tiny, dense, positively charged core (nucleus) surrounded by negatively charged electrons. This is sometimes referred to as the 'planetary model' because the electrons move around the nucleus in paths that resemble the orbits of planets around the sun.

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Answer:

The correct answer is : 2- Energy.

Explanation:

Answer:

The correct answer is : Kinetic Energy and Thermal Energy.

Explanation:

Answer:

This is true.

Explanation:

Answer and Explanation:

The Cretaceous–Paleogene extinction, which occurred around 66 million years ago, is defined as a mass extinction that wiped out around three-quarters of species on Earth.

Among the organisms that disappeared during this event, we find mammals, birds, fish, sharks, pterosaurs, birds, reptiles, insects, and some plant species.

This event is marked by the presence of a sediment layer known as the K-Ph boundary which showed important levels of iridium, an element that is abundant in craters. Therefore, after its discovery, scientists hypothesize this extinction occurred due to the impact of the giant Chicxulub crater which changed the conditions of the atmosphere.

Answer:

21

Explanation:

Amino acids are the basic structural units of proteins. Our bodies contain 21 amino acids it uses to make all proteins, although books recognize only 20 amino acids. The 20 amino acids are the alphabet of proteins.

Answer:

Protista, Fungi, Plantae, and Animalia.

Explanation:

Answer:

Protista, Fungi, Plantae, and Animalia.

Explanation:

Eukaryotes represent a domain of life, but within this domain there are multiple kingdoms. The most common classification creates four kingdoms in this domain: Protista, Fungi, Plantae, and Animalia.

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Answer AND Explanation:

MALES

Testes: they are oval shaped structures that produce the male gametes and sex hormone called testosterone.

Seminiferous tubules: tubules where spermatogenesis occurs.

Vas deferens: are tubules which lead to the epididymis.

Epididymis: is along, coiled tube for storage of sperms. it contraction and relaxation pushes sperms out and allows ejaculation through the urethra.

Accessory glands like the seminal vesicles, cowper's gland and prostate gland produce seminal fluid that provides a nutrient medium for sperms to swim in.

Scrotum: contains the testes outside the body.

FEMALES

Ovary: these are oval-shaped structures that produce female gametes and sex hormones.

Oviduct: these are hollow structures with an expanded funnel-shaped opening which accepts the released ovum and directs it to the fallopian tube. Fertilization takes place in the oviduct  forming zygote.

Uterus: has an inner layer called endometrium which becomes folded and  vascularised to allow implantation. The endometrium nourishes the embryo..

Cervix: is a muscular ring between the uterus and the vagina. It secretes a plug of mucus, which prevents entry of pathogens and air

The vagina is a muscular copulatory canal into which penis enters. Vagina also allows passage of foetus during parturition.

Answer:

The nitrogen cycle could not exist without the presence of nitrogen-fixing microorganisms.

Explanation:

As part of the biogeochemical cycles that occur in nature, the nitrogen cycle involves all the organic and non-organic processes that allow the incorporation of this element into the organism of living beings.

Although nitrogen is abundant in nature, in gaseous form, living beings cannot take advantage of it, because they lack the ability to convert this gas into organic nitrogen. Nitrogen-fixing microorganisms -such as bacteria in the soil- turn inorganic nitrogen into organic, that incorporates plants.

Nitrogen-fixing bacteria exist in both soil and plant roots. They are responsible for the conversion of atmospheric nitrogen and ammonium, the product of the degradation of organic matter, into nitrites and nitrates that assimilate the plants. Herbivorous animals obtain this nitrogen from vegetables, and carnivores from them.

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Answer: Bacteria

Explanation:

Answer:

Spermatogenesis takes place in the seminiferous tubules, which are an intricate system of tubules in the testes where spermatogenesis takes place. ... A sperm cell lashes its flagellum back and forth to propel the sperm forward.

Answer:

everything

Explanation:

Answer:

During passive transport, the concentration of substances on either side of the membrane are trying to reach equilibrium.

Explanation:

Passive transport can be described as the movement of molecules from a region of higher concentration to a region of lower concentration along a concentration gradient. As the molecule are higher at one side and lower on the other side, the molecules move so that there can be equal  number of molecules on each side so that equilibrium can be reached and maintained.

Answer:

Oxygen enters the blood stream through the alveoli, which are tiny air sacs in the lungs where gas change is exchanged. Carbon Dioxide goes in through the alveoli and out goes oxygen.

2. air sacs

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Final answer:

Oxygen enters the bloodstream from the alveoli, which are tiny air sacs in the lungs. Here, through the process of external respiration, oxygen is transferred into the blood. The correct answer to the question is (2) air sacs, referring to the alveoli where gas exchange actually occurs.

Explanation:

In humans, oxygen enters the bloodstream from the alveoli, which are tiny air sacs in the lungs where gas exchange takes place. As you breathe in, oxygen-rich air first travels through your mouth and nose, down the trachea, and then through a series of branching bronchi and bronchioles before finally reaching the alveoli. It is here, in the alveoli, that oxygen passes through the walls of the air sacs and into the blood in the surrounding capillaries. This process is known as external respiration.

The correct answer to the question is (2) air sacs, referring to the alveoli where gas exchange actually occurs.

Answer:

Explanation:

electrons

Answer:

A

Explanation:

Plants use carbon dioxide (CO2), sunlight, and water (H2O) in photosynthesis, which is how plants make food (glucose).

Final answer:

The evidence from the given model that supports the claim that cell division increases genetic variation in the daughter cells is the fact that each division doubles the number of cells.

Explanation:

The evidence from the given model that supports the claim that cell division increases genetic variation in the daughter cells is the fact that each division doubles the number of cells. As the cell divides, the genetic information is replicated and distributed to each of the daughter cells. This process leads to an increase in the number of cells with different combinations of genes, resulting in genetic variation.

Answer:c

Explanation:

Answer:

Transcription

Explanation:

This is the process by which the information contained in the DNA is copied by base pairing to form a strand of ribonucleic acid called messenger RNA. During transcription, the portion of the DNA with the organic bases required for the synthesis of the required protein open up. Free RNA nucleotides align opposite one of the chains in a complementary relationship. Guanine of RNA pairs with cytosine of DNA. Adenine of RNA pairs with thymine of DNA while uracil of RNA pairs with adenine of DNA.

Answer:

For any experiment we can say that light waves are the electromagnetic waves because they make up what is known as the electromagnetic spectrum.

Explanation:

Answer:

The urinary system

Explanation:

Answer: The dimension of the smaller garden is 6ft x 3ft

Explanation:

The scale factor given from the question is reduction scale(3/4).

When the scale given is directly multiply by the value from the bigger garden of dimension 8ft x 4ft we have:

First multiply it by the length followed by the width as follows;

8x3/4= 6 then,

4x3/4= 3

So, from here we have the length of the smaller 6ft and the width is 3ft...

The correct answer is 6ft by 3ft.

Answer:

"The vegetation it eats increases and then decreases repeatedly with changing seasons" would be a reason for species to undergo cyclic population changes.

Explanation:

A keystone specie corresponds to an organism species which has disproportionately high environmental effects relative to its abundance or population.Many living organism population typically undergo cyclical shifts in size of population.

Cyclic oscillation leads to regular decline and fall across time in the population size of the living organism concerned.The cyclical population shifts are sometimes triggered by relationships between different organism populations. Disruptions in food availability, for an instance, may bring about cyclical shifts in population.

Answer:

industrial water is used for fabricating, processing, washing, diluting, cooling, or transporting a product. In homes water is used to drinking, preparing food, bathing, washing clothes and dishes, brushing your teeth, watering the yard and garden, and even washing the dog. In agriculture it is used to grow plants  and susutain livestock

Explanation:

Water is primarily used for agriculture, industry, and municipal needs. In agriculture, it is used for irrigation. In industry, it is essential as a coolant, solvent, and for generating electricity, while in homes, it is used for daily domestic tasks and treated after use.

Water is essential for various daily activities and industrial processes. The greatest use of water is in agriculture, where it is predominantly used for irrigation to grow crops. In the industrial sector, water plays a crucial role as a coolant, solvent, and as a part of many chemical processes. It is also vital in generating electricity, especially in nuclear power plants where it is used to moderate and cool the reactor core. For municipal use, which includes both homes and businesses, water is used for domestic purposes such as personal hygiene, food preparation, cleaning, gardening, and in sewage systems. In the home, water is utilized for drinking, cooking, bathing, washing dishes, doing laundry, and flushing toilets. After use, water is treated at sewage treatment plants before it can be prepared for reuse.

Answer: is the 4 and the 6 one

Explanation:

Some mutations don't have any noticeable effect on the phenotype of an organism. This can happen in many situations: perhaps the mutation occurs in a stretch of DNA with no function, or perhaps the mutation occurs in a protein-coding region, but ends up not affecting the amino acid sequence of the protein.

Errors in protein synthesis cause phenotypic mutations. These errors cause amino acid substitutions, which result in abnormal proteins. Experiments indicate that such errors are fairly common.

A mutation is a modification in an organism's DNA sequence. Mutations can occur as a consequence of errors in DNA replication during cell division, mutagen exposure, or viral infection.

Protein synthesis errors result in phenotypic mutations. These errors result in amino acid substitutions, resulting in abnormal proteins. Experiments show that such mistakes are fairly common.

Silent point mutations are one example. They are considered neutral because they do not alter the amino acids in the proteins that they encode.

Because they are repaired before protein synthesis, many other mutations have no effect on the organism. To repair DNA mutations, cells have a variety of repair mechanisms.

Thus, this can be the example of mutation that will affect an organism's phenotype.

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The input for cellular respiration is oxygen ( [tex]o_{2}[/tex] ) from the followings.

Explanation:

Answer:

Fish farming can be described as a method which is devised to raise fishes commercially in tanks or ponds.

Some of the disadvantages of creating fish cultures are:

Final answer:

Raising fish in fish farms can cause environmental issues such as non-native species escaping and becoming invasive, altering native genetic pools, decreasing dissolved oxygen levels, and spreading diseases to wild populations, which affects marine ecosystems and local human communities.

Explanation:

One drawback of raising fish in fish farms is the risk of non-native species escaping into local ecosystems. Such escapes can lead to genetic introgression, where the aquaculture species mix with native ones, potentially altering the local genetic pool. Additionally, non-native species can become invasive, outcompeting or preying on native fish, leading to a decrease in native fish populations. This phenomenon can result in lower levels of dissolved oxygen in freshwater habitats across North America, as the influx of farmed fish increases competition for resources. Moreover, the escaped fish from aquaculture can spread diseases to wild populations, which is another serious concern.

Fish farming practices using non-native species contribute to the restructuring of marine ecosystems. This restructuring often diminishes the role of native and previously dominant species, affecting ecological balance and local human communities reliant on fishing for their livelihood. The introduction of non-native species through aquaculture, with a high likelihood of escape, should be considered when assessing the overall sustainability and environmental impact of fish farms.

Answer:

To perform an experiment that involves extract blood from partner's finger and determining their blood type, the safety gear that should be used are gloves, to protect you from any infectious agents in the blood (option B).

Explanation:

The use of gloves -both for trained and untrained personnel- is one of the biosecurity measures implemented to avoid contact with biological products, and to prevent infections when they are contaminated.

However, although the gloves prevent direct contact with the blood, they do not prevent puncture with objects -such as needles- so the use of gloves should be accompanied by other biosafety measures to avoid accidents in the laboratory.

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