(a) Define a microscope.
(b) List three uses of a compound microscope.
(c) Tabulate 5 differences between optical microscope and electron
microscope
(a) Briefly account on how microscope was discovered.
(b) State two uses of magnifying lenses
(c) Distinguish between the types of magnifying lenses

The doctor indicates your sore throat is caused by a virus and knew since no viral colonies grew on the agar due to the degenerative changes in monolayer cells as it provide evidence of viral presence.

This is referred to as an infectious agent which is made up of a core of genetic material, either DNA or RNA, surrounded by a protective coat called a capsid which is made up of protein.

In a scenario where  no viral colonies grew on the agar, we can detect the presence of a virus through degenerative changes in monolayer cells thereby making it the correct choice in this scenario.

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The denser a material is, the faster a seismic wave travels

The propagation of seismic waves through earth materials is measured using seismic techniques. When conducting seismic surveys, a sound source at the surface, such as an explosion or a mechanical impact, causes seismic waves to propagate outward.

Denser materials allow seismic waves to propagate more quickly, hence depth generally increases the speed of seismic waves. Seismic waves are slowed in abnormally hot regions. A liquid conducts seismic waves more slowly than a solid does.

Acoustic waves are used in seismic surveys to generate images of the ground by analysing their vibrations. While certain seismic waves can travel deep under the earth through solid rock and fluids, others can simply move along the surface of the planet like water ripples.

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Answer:

1. the water temperature

a) The percentage abundance determines how much we have the isotope.

b) The relative atomic mass is 122.5 amu

c) The Rutherford's model explained the atom.

It is clear that the isotope that we know are the atoms of an element that has the same atomic number but they do not have the same mass number. The implication of this is that the elements that are in question have many atoms of the element but they are not exactly alike as we would have expected.

Given that we have the element X we can be able to write that;

Relative atomic mass = Weighted average of all the isotopes

As such we have;

(121 * 0.432) + (123 * 0.531) + (129 * 0.0370)

52.27 + 65.31 + 4.773

=122.35 amu

The Rutherford's model gives a good idea about the way that the atom of the element may look like and this is the entire idea of the model to help us to make sense of the atom.

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There are various branches of biology, and although some study entire (2) planets, others are more interested in teeny (1) molecules. In the discipline of (3) global ecology, biologists investigate how the actions of all living things impact the atmosphere and climate.

There are different branches of biology, and some biologists focus on the minuscule while others investigate the enormous. In the field of, biologists research how all living things' actions impact the climate and the atmosphere. Researchers are looking on ways to genetically modify microbes or repair damaged DNA.

There are different branches of biology, and some biologists focus on the minuscule while others investigate the enormous. In the field of, biologists research how all living things' actions impact the climate and the atmosphere.

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Answer:

Phosphorus moves in a cycle through rocks, water, soil and sediments and organisms.

Explanation:

Over time, rain and weathering cause rocks to release phosphate ions and other minerals. This inorganic phosphate is then distributed in soils and water. Plants take up inorganic phosphate from the soil.

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hope it will help you......｡⁠◕⁠‿⁠◕⁠｡

Answer:Clear cold weather for several days

Explanation:onh

Answer: I Would say Point B

Explanation: I think im smart

The three components of biodiversity are genetic variety, species diversity, and ecosystem diversity. The variety of species in an area is referred to as species diversity.

The diversity of habitats, communities, and all biological processes among ecosystems is implied by the term "ecosystem diversity."

The variation of inheritable traits or genes present in a group of the same species is what genetic diversity is all about. A measure of diversity within an ecological community that takes into account both species richness and the evenness of species abundances is referred to as species diversity. Diversity of an ecosystem includes both habitat and community diversity.

Science has identified about 1.7 million species that exist on Earth. It is estimated that there are many more species, particularly those of tiny organisms. These projections are still being updated by scientists. 2. Describe three biodiversity tiers.

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Anaerobic respiration in muscle cells occurs as a result of vigorous exercise; so it is stated to be correct that anaerobic respiration in muscle cells is the product of hard exercise.

Anaerobic (cellular) respiration is a type of respiration that happens in both eukaryotes and prokaryotes in which cells break down sugar molecules to produce energy in the absence of oxygen.

Anaerobic respiration occurs in muscles during vigorous exercise. Because glucose is not entirely broken down, less energy is produced during aerobic respiration. During hard exercise, lactic acid accumulates in the muscles. Later, the lactic acid require to be oxidized to carbon dioxide and water.

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Answer:

kinda blurry so I hope I answered everything correctly!

A. The Linear equation would be x + y = 50

B. Ted spends 35 minutes practicing the breaststroke every day.

Ted spends 50 minutes every day swimming so x +y = 50 (let us say x is butterfly stroke and y is breaststroke). Since he practices the breaststroke for 20 more minutes than the butterfly stroke we have:

2x + 20 = 50

2x = 50 - 20

2x = 30

x  =30 / 2

x  = 15

y = 15 + 20  =35 minutes

C. No, it is not possible for Ted to have spent 45 minutes practicing the butterfly stroke every day because of the time constraint.

It is crucial for mitosis to be error free so that the normal and healthy cells do not get transformed to form cancer cells.

Mitosis is basically a cell division in which one cell, the mother cell, divides in order to give rise to two new cells which we call as the daughters cells that are identical genetically to itself. In the cell cycle, mitosis is the process of division in which the DNA splits and forms two equal sets of chromosomes. It is important for both repair as well growth in the body.

It is very important for mitosis to be error free as any fault in the process might result in the transformation of healthy cells into cancer cells which do not have a regulated growth. These transformed cells will keep growing in numbers and give rise to tumors in the body of an individual which might lead to diseases like cancer.

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They travel faster towards the negative end of the gel is the best describes smaller DNA fragments that undergo DNA electrophoresis.

What are the characteristics of DNA movement in electrophoresis?

Under the direction of an electric field, electrophoresis divides biomolecules such as proteins, nucleic acids, amino acids, etc. based on their size, shape, chemical charge, etc. A positively charged molecule (Anion) will travel toward the negatively charged electrode (Cation) when the electric field is present. Moving in the direction of the positively charged electrode, or anion, is the negatively charged molecule (cation). "Cataphoresis" is the movement of a positively charged ion toward a negatively charged electrode. Anaphoresis is the term for the migration of a negatively charged ion toward a positively charged electrode.

DNA being negatively charged moves towards positive end of the gel and also smaller fragments are light weighted so move faster that larger fragments that are heavy.

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Answer:

The answer to your question is ⇔ 35 degrees centigrade.

Which is equal to 95 degrees Fahrenheit.

Explanation:

I hope this helps and have a wonderful day!

Answer: it should have lighting and uvb light, littile heating pads in the winter but i recomend the hot spot to be 100 to 110 where the area youre dragon should sit, whats the age?

Explanation:

im a exspert on animals and they live in the desert.

YES, psychology is a science because it is based on scientific methods.

Psychologists use the scientific method in order to obtain results and conclusions. Using the scientific approach in psychology, first of all, the question or hypothesis is stated, for which then a theory is made, and after that field experiment or rigorous laboratory is designed in order to check the stated hypothesis.

Psychology employs the understanding gained through research to produce evidence-based approaches that solve problems and improve everyday lives. Since psychology is based on scientific evidence, it is said to be correct that psychology is a science.

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A snapdragon mating is 6:3:3:2:1:1 if it is heterozygous for both height and blossom colour.

Response and Justification: (B) Wavy hair is the right response. When an organism expresses a phenotype that is in-between the two distinct alleles of a gene, it is said to exhibit incomplete dominance.

Gene interaction known as incomplete dominance occurs when only one of two alleles of a gene at a locus is fully expressed, frequently leading to an intermediate or distinct phenotype. Partial domination is another name for it.

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A variable that is independent is precisely just what sounds like. It is a stand-alone variable that is unaffected by other variables that are attempting to assess. Age, for instance, could be an independent factor.

Identifying cause and effect correlations is one of the most important components of scientific research. Knowing which variable is the cause, or independent variable, and which is the consequence, or dependent variable, is crucial.

It is a stand-alone variable that is unaffected by the various variables you are attempting to measure. Age, for instance, might be a variable and the independent. A person's age won't change as a result of other factors like what people eat, how so much they attend school, or how much t.v they watch.

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Answer:

She problably trains harder than her family, which would make her faster than them.

Shivering is an example of negative feedback since it is a reaction that attempts to raise body temperature in an effort to undo the initial change and return to the set point.

Shivering is the term for when your muscles start to rapidly contract and loosen over and over again in a short amount of time. You stay a little bit warmer because to the heat produced by the energy required to cause your muscles to tremble.

When muscles just below the skin's surface contract voluntarily to "shiver," they generate heat that helps the body temperature return to a normal range. This is caused by hormones released by the hypothalamus.

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Males with normal eyes and small wings and females with white eyes and normal wings are the results of this cross in terms of gender, eye color, and wing size.

When you are born, your gender is determined by your X and Y chromosomes. In females, there are two X chromosomes. The term "sex chromosomes" is also used. Every male has one X and one Y chromosome.

Almost everyone has roughly equal odds of giving birth to a boy and a girl. What we can say is that the father's sperm determines whether a kid will be born as a boy or a girl.

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Question:

Determine the outcome of this cross in terms of sex, eye color, and wing size of the offspring.

Select all that apply.

A) males with normal eyes and normal wings

B) males with white eyes and normal wings

C)males with normal eyes and miniature wings

D) males with white eyes and miniature wings

E) females with normal eyes and normal wings

F) females with white eyes and normal wings

G) females with normal eyes and miniature wings

H) females with white eyes and miniature wings

The very high levels of Iridium at the KT boundary was confirmed in different parts of the world and supported an already existing hypothesis, a supernova had caused the extinction. The hypothesis was tested as Scientists tested the amount of plutonium in the KT boundary.

KT boundary is described as the thin layer of clay that separates rock layers from the end of the Cretaceous period to those from the beginning of the tertiary (Paleogene) period.

Lack of an isotope of plutonium in the K-T boundary layer prompted researchers to abandon the hypothesis that a supernova caused the high levels of iridium in the K-T layer.

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The principal expression of a logical name of an organic entity demonstrates its variety and the subsequent word shows the species. By this technique for binomial classification, the logical name of an organic entity has been made normal from one side of the planet to the other.

The initial segment of the name - the nonexclusive name - recognizes the variety to which the species has a place, though the subsequent part - the particular name or explicit designation - recognizes the species inside the family. For instance, present-day people have a place with the variety Homo and inside this family to the species Homo sapiens.

Logical names are made out of two Latin or Greek terms: the first compares to the variety and the subsequent one, to the species having a place with this family.

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as there are fewer number of connections in that organism that was silk that is having the property of flexibility.

define traits ?

Personality traits are the building elements of personality. So, what exactly is a trait? In a nutshell, it's a generally steady style of thinking and behaving that can be used to characterise someone and compare and contrast them with others.

Traits can be expressed in broad words, such as how well inclined a person is toward other people in general, or in more particular terms, such as how much that person trusts other people. These more distinct components of personality are referred to as "facets" at times. Personality qualities are typically thought to be separate from mental talents (including general intelligence), which are evaluated based on how effectively one reacts to situations or queries.

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Answer:

he has low flexibility.

Explanation:

Traits can be expressed in broad words, such as how well inclined a person is toward other people in general, or in more particular terms, such as how much that person trusts other people. These more distinct components of personality are referred to as "facets" at times. Personality qualities are typically thought to be separate from mental talents (including general intelligence), which are evaluated based on how effectively one reacts to situations or queries.

Answer: An enzyme increases the rate of reaction it catalyzes. It does this by combining with the substrate to form a highly reactive enzyme-substrate complex.

Explanation:

Answer: D. Epithelial tissue.

Explanation:

Epithelial tissue is the type of tissue that lines the airways in the lungs, including the bronchi and bronchioles. This tissue acts as a barrier, protecting the lungs from foreign particles and microorganisms, and also helps to move mucus and other substances out of the lungs. In the case of lung cancer, it is common for the cancer to first develop in the epithelial tissue lining the airways.

Answer:

metabolism

Explanation:ong

By supplying working muscles with blood and oxygen, the circulatory system aids the muscular system. Because the circulatory system makes it possible for muscles to acquire the oxygen they require to perform effectively, it also benefits the muscular system.

In order to transfer the blood to all the body's cells, tissues, and organs, the circulatory, respiratory, and muscle systems collaborate to add oxygen to the body's otherwise deoxygenated, impure blood.

Blood is transported from the heart to a lungs via the cardiovascular system in order for the body to receive oxygen. The remainder of the body is subsequently supplied with oxygenated blood by the heart through arteries.

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Option a is Correct. Specific genes can be active or dormant depending on their surroundings.

The same genes are present in both twins, but not in the same amount of copies. This could explain some minor discrepancies between the twins or why one of them is more susceptible to illness. Similar prenatal conditions (placenta) are shared by identical twins as well, though one may get a little bit more sustenance and care.

A gene is expressed if it is active, and it is not expressed if it is inactive. Inactive genes may become active as a result of environmental influences. Each cell's nucleus contains chromosomes, which are structures that resemble threads and contain the DNA molecule. Each chromosome is constructed of DNA that has been tightly wound around proteins several times to support its structure.

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Answer:

Main content

What are energy and work?

Here we learn what work and energy mean in physics and how they are related.

What does energy and work mean?

Energy is a word which tends to be used a lot in everyday life. Though it is often used quite loosely, it does have a very specific physical meaning.

Energy is a measurement of the ability of something to do work. It is not a material substance. Energy can be stored and measured in many forms.

Although we often hear people talking about energy consumption, energy is never really destroyed. It is just transferred from one form to another, doing work in the process. Some forms of energy are less useful to us than others—for example, low level heat energy. It is better to talk about the consumption or extraction of energy resources, for example coal, oil, or wind, than consumption of energy itself.

A speeding bullet has a measurable amount of energy associated with it; this is known as kinetic energy. The bullet gained this energy because work was done on it by a charge of gunpowder which lost some chemical potential energy in the process.

A hot cup of coffee has a measurable amount of thermal energy which it acquired via work done by a microwave oven, which in turn took electrical energy from the electrical grid.

In practice, whenever work is done to move energy from one form to another, there is always some loss to other forms of energy such as heat and sound. For example, a traditional light bulb is only about 3% efficient at converting electrical energy to visible light, while a human being is about 25% efficient at converting chemical energy from food into work.

How do we measure energy and work?

The standard unit used to measure energy and work done in physics is the joule, which has the symbol J. In mechanics, 1 joule is the energy transferred when a force of 1 Newton is applied to an object and moves it through a distance of 1 meter.

Another unit of energy you may have come across is the Calorie. The amount of energy in an item of food is often written in Calories on the back of the packet. A typical 60 gram chocolate bar for example contains about 280 Calories of energy. One Calorie is the amount of energy required to raise 1 kg of water by 1∘∘degrees Celsius.