Biology High School

what's the difference between a pathogenic virus and a harmless one?

Answers

Answer 1
Answer: Pathogenic viruses end up killing cells; harmless ones don’t.


Yw

Related Questions

how the disease spread by bacteria transmit from one person to another explain. ​

Answers

Explanation:

Germs can spread:

directly from person to person orindirectly from an infected person to the environment (for example toys, door handles, bench tops, bedding and toilets) and then to another person who comes in contact with the contaminated environmental source.

Germs can enter the body through the:

mouthrespiratory tracteyesgenitalsbroken skin.

The third level of cell organization is the ____.

Tissue level
System level
Organism level
Organ level

Answers

Organ .. I believe .. :)
Yes it is the organ :)



What are the states of energy? List the Laws of Thermodynamics.

Answers

Answer:

The laws of thermodynamics define a group of physical quantities, such as temperature, energy, and entropy, that characterize thermodynamic systems in thermodynamic equilibrium.

Explanation:



What are the states of energy? List the Laws of Thermodynamics.
Answer: The first law, also known as Law of Conservation of Energy, states that energy cannot be created or destroyed in an isolated system. The second law of thermodynamics states that the entropy of any isolated system always increases.

Paragraph: Discuss the three laws of thermodynamics.
Key Points

The first law, also known as Law of Conservation of Energy, states that energy cannot be created or destroyed in an isolated system.
The second law of thermodynamics states that the entropy of any isolated system always increases.
The third law of thermodynamics states that the entropy of a system approaches a constant value as the temperature approaches absolute zero.
Terms

absolute zeroThe lowest temperature that is theoretically possible.
entropyA thermodynamic property that is the measure of a system’s thermal energy per unit of temperature that is unavailable for doing useful work.

System or Surroundings

In order to avoid confusion, scientists discuss thermodynamic values in reference to a system and its surroundings. Everything that is not a part of the system constitutes its surroundings. The system and surroundings are separated by a boundary. For example, if the system is one mole of a gas in a container, then the boundary is simply the inner wall of the container itself. Everything outside of the boundary is considered the surroundings, which would include the container itself.

The boundary must be clearly defined, so one can clearly say whether a given part of the world is in the system or in the surroundings. If matter is not able to pass across the boundary, then the system is said to be closed; otherwise, it is open. A closed system may still exchange energy with the surroundings unless the system is an isolated one, in which case neither matter nor energy can pass across the boundary.


A Thermodynamic SystemA diagram of a thermodynamic system
The First Law of Thermodynamics

The first law of thermodynamics, also known as Law of Conservation of Energy, states that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another. For example, turning on a light would seem to produce energy; however, it is electrical energy that is converted.

A way of expressing the first law of thermodynamics is that any change in the internal energy (∆E) of a system is given by the sum of the heat (q) that flows across its boundaries and the work (w) done on the system by the surroundings:

Δ
E
=
q
+
w
Δ
E
=
q
+
w

This law says that there are two kinds of processes, heat and work, that can lead to a change in the internal energy of a system. Since both heat and work can be measured and quantified, this is the same as saying that any change in the energy of a system must result in a corresponding change in the energy of the surroundings outside the system. In other words, energy cannot be created or destroyed. If heat flows into a system or the surroundings do work on it, the internal energy increases and the sign of q and w are positive. Conversely, heat flow out of the system or work done by the system (on the surroundings) will be at the expense of the internal energy, and q and w will therefore be negative.

The Second Law of Thermodynamics

The second law of thermodynamics says that the entropy of any isolated system always increases. Isolated systems spontaneously evolve towards thermal equilibrium—the state of maximum entropy of the system. More simply put: the entropy of the universe (the ultimate isolated system) only increases and never decreases.

A simple way to think of the second law of thermodynamics is that a room, if not cleaned and tidied, will invariably become more messy and disorderly with time – regardless of how careful one is to keep it clean. When the room is cleaned, its entropy decreases, but the effort to clean it has resulted in an increase in entropy outside the room that exceeds the entropy lost.

The Third Law of Thermodynamics

The third law of thermodynamics states that the entropy of a system approaches a constant value as the temperature approaches absolute zero. The entropy of a system at absolute zero is typically zero, and in all cases is determined only by the number of different ground states it has. Specifically, the entropy of a pure crystalline substance (perfect order) at absolute zero temperature is zero. This statement holds true if the perfect crystal has only one state with minimum energy.

Which of the following is not a property of water? ​

Answers

Answer: It becomes more dense when it freezes.

Explanation: water becomes less dense when it freezes because ice has a cage like structure.

recently, state forests and parks like yellowstone national park which contain varieties of flowering trees and shrubs, have started to erect signs that state, take nothing but pictures, leave nothing but footprints. which argument best supports why these signs are being placed in state forests and parks?

Answers

The argument that best supports why the signs are placed in the parks is that humans have the capacity to cause damages to the stability of ecosystems through their actions.

By removing tissues of plants or even entire plants, the stability of the entire park can be disrupted depending on the role such a plant plays in the ecosystem. Some species of organisms in the ecosystem play key roles and their removal or damages may cause significant disruption to the entire ecosystem.

Also, by leaving things that can be harmful to the plant species in parks, immeasurable damages can be done to the entire ecosystem.

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The best argument that supports the signs being placed in state forests and parks is: humans are capable of damaging the stability of the ecosystems by removing trees and shrubs.

Different components in an ecosystem interact with each other to ensure biodiversity is sustained. Some species of an ecosystem play important roles and a disruption or removal of such key species would cause disruption in the ecosystem.

Trees and flowers in this said park play important roles in the ecosystem of the park. If they are damaged or removed from the ecosystem, the biodiversity of the ecosystem will be impacted which will cause instability of the ecosystem.

Therefore, the best argument that supports the signs being placed in state forests and parks is: humans are capable of damaging the stability of the ecosystems by removing trees and shrubs.

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what is it called when they check cells for cancer

Answers

Answer:

screening

Explanation:

explain how redox reactions are involved in energy exchanges

Answers

Answer:

In redox reactions, energy is released when an electron loses potential energy as a result of the transfer. Electrons have more potential energy when they are associated with less electronegative atoms (such as C or H), and less potential energy when they are associated with a more electronegative atom (such as O).

what is the difference in solubility of triglyceride and the products of their hydrolysis​

Answers

Answer: Triacylglycerols are the major constituents of oils and fats of both plant and animal origin.

Explanation:

Hope this helps.

The products of hydrolysis of triglycerides are fatty acids and glycerol. While fatty acids, like triglycerides, are insoluble in water, glycerol is soluble in water.

Why are triglycerides insoluble?

Triglycerides are esters of fatty acids and alcohol, mostly glycerol. The fatty acid chains are inked to the glycerol molecules with the help of covalent bonds.

This means that the triglyceride molecule is uncharged and will therefore remain insoluble in water but soluble in organic solvents.

Also, products of hydrolysis of triglycerides are fatter acids and glycerol. While fatty acids will remain insoluble in water, glycerol is soluble in water.

Glycerol is alcohol with 3 hydroxyl groups, this is why it is also called a polyol. They are able to hydrogen bonds with the nearby water molecules.

Therefore, triglycerides and fatty acids are insoluble and glycerol is soluble in water.

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Cell cycle regulators are:


1. Proteins that control the progression of a cell through the cell cycle

2. Enzymes that remove a phosphate from proteins

3. Genes that code to destroy a cell if it becomes cancerous

4. Chemicals that slow down the growth of cells

Answers

Answer:

If this didn't help then vote me 1 star. Thanks.

Explanation:

Two groups of proteins, called cyclins and cyclin-dependent kinases (Cdks), are responsible for the progress of the cell the. A phosphatase is an enzyme that removes a phosphate group from a protein. Together, these two families of enzymes act to modulate the activities of the proteins in a cell, often in response to external stimuli. Rough the various checkpoints. What genes destroy cancerous cells?  The primary function of the p53 gene is to repair or destroy defective cells, thereby controlling potential cancerous cells. This type of gene is called an anti-oncogene or tumor suppressor gene Cancer growth blockers are also called cancer growth inhibitors. They are a type of targeted cancer drug.  Our body makes chemicals called growth factors that control cell growth. Cancer growth blockers work by blocking the growth factors that trigger cancer cells to divide and grow. There are many types of cancer growth blockers that work in different ways..

Solve for C. F-32/1.8 =
F = 426F

Answers

.

You multiply °C by 1.8 and add 32 = °F. If you don’t have a calculator / smartphone, you double it and subtract 10%.

Ex. (°F to °C):

100°C *1.8 = 180+32 = 212°F = boiling point of water.

100*2–10% +32; 100*2=200–10% (20) =180, +32 = 212°F

°F to °C :

212 - 32 = 180. 180 / 1.8 =

Answer:

C =− 27.7

Explanation:

which neurons receive a signal first? (information about the environment like heat or pain)

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Answer:

Dendrites. The first two neuronal functions, receiving and processing incoming information, generally take place in the dendrites and cell body.

how can carbon dioxide limit the rate of photosynthesis

Answers

Answer:

An increased level of carbon dioxide leads to a higher rate of photosynthesis when compared to the lower carbon dioxide level. This shows that the carbon dioxide level has an effect and is now limiting the rate of photosynthesis.

Explanation:

please help!!
I WILL MARK BRAINLIEST!!!!​

Answers

Answer:

1.A

2.C

3.D

4.C

5.A

Explanation:

1.There are some characteristics that are inherited from your parents, shape of blood cells is one of them. In sexual reproduction, offspring are formed when sperm of male combine with egg of female organism.Therefore, some characteristics comes from male organism and some from female organism. In sexual reproduction, diploid organism is formed because half of genes comes from male and half comes from female.

2.Heredity, also called inheritance or biological inheritance, is the passing on of traits from parents to their offspring; either through asexual reproduction or sexual reproduction, the offspring cells or organisms acquire the genetic information of their parents

3.A monk, Mendel discovered the basic principles of heredity through experiments in his monastery's garden. His experiments showed that the inheritance of certain traits in pea plants follows particular patterns, subsequently becoming the foundation of modern genetics and leading to the study of heredit

4.Mendel made sure to study 30,00 pea plants when he presented his data to the community. Another example is when Mendel painstakingly removed all of the immature anthers from the plant’s flowers before the cross.Mendel used seven pea plant traits in his experiments which include flower color (purple or white), flower position (axil or terminal), stem length (long or short), seed shape (round or wrinkled), seed color (yellow or green), pod shape (inflated or constricted), and pod color (yellow or green).

5.A pea plant could have a copy of the height gene that coded for "tall" and a copy of the same gene that coded for "short." But the tall allele is "dominant," meaning that a tall-short allele combination would result in a tall plant

Use the molecular structures to predict which of the six solutions will test positive for glucose. Write your prediction in the answer space. Provide the reasoning behind your prediction.

Answers

The monosaccharides; glucose, fructose and galactose all test positive to Fehlings solution.

Fehlings solution is used as a test for reducing sugars. All reducing sugars that contain aldehydes or ketones all test positive to the Fehlings solution. A positive test is indicated by the formation of a brick - red precipitate on boiling.

The monosaccharides, glucose, fructose and galactose all test positive to Fehlings solution owing to the presence of the C=O group in each compound.

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Explain the 6 levels of organization.

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Life processes of the human body are maintained at several levels of structural organization. These include the chemical, cellular, tissue, organ, organ system, and the organism level.

How did the bombardment of Earth by solid particles affect its temperature

Answers

Answer:it affected it by being hot

Explanation:

snglekns

The bombardment of the earth by solid particles affects its temperature because the bombardments release heat and make the earth warmer, and due to this, the early earth was hotter.

What is the earth?

The Earth is the planet in the solar system that moves around the sun, and it has living plants and animals along with non-living substances such as soil, air, water, etc. Most of the earth is covered with water and the earth has various populations, biomes, and biodiversities, and all of this biodiversity is due to changes in climate and geography, which result in the presence of various animals.

Hence, the bombardment of the earth by solid particles affects its temperature because the bombardments release heat and make the earth warmer, and due to this, the early earth was hotter.

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Como saber que algo está compuesto por una célula

Answers

Respuesta:

Las células están formadas por un núcleo y un citoplasma, encerradas por una pared delgada llamada membrana, que las separa de su entorno. Las células vegetales también tienen núcleo, citoplasma y membrana celular. La principal diferencia entre una célula vegetal y una animal es que las células vegetales tienen una vacuola, un cloroplasto y una pared celular.

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For english guys, the question and answer is there below in ENGLISH!

Question:

How to know that something is made up of a cell

Answer:

Cells are made up of a nucleus, and a cytoplasm, enclosed by a thin wall called a membrane, which separates it from its surroundings. Plant cells have a nucleus, cytoplasm, and a cell membrane too. The main difference between a plant and an animal cell is that plant cells have a vacuole, chloroplast, and a cell wall.

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What molecules diffuse through the cell membrane without the use of energy and are required as reactants in photosynthesis?

A.glucose and oxygen

B.water and oxygen

C.glucose and carbon dioxide

D.water and carbon dioxide

Answers

Answer:

c

Explanation:

If the substances can move across the cell membrane without the cell expending energy, the movement of molecules is called passive transport. Consider substances that can easily diffuse through the lipid bilayer of the cell membrane, such as the gases oxygen (O 2) and carbon dioxide (CO 2)

PLEASE HELP WILL MAKE MOST BRAINLIEST IF POSSIBLE LOOK AT PICTURE

Answers

Answer:

CFC, water vaper, methane,  carbon dioxide

Explanation:

HELP ME PLEASEEE
1. What percentage of the offspring will be heterozygous?
2. Why does each parent contribute only one allele to the offspring?

Answers

Answer:

1. 50% from the picture as they are Aa which means they are heterozygous and AA mean dominant and aa means ressecive.

2. Because alleles are segregated during meiosis when homologous chromosomes are separated.

Explanation:

Hope this make helps you to understand :)

1. 50%
2. Because alleles are segregated during meiosis when homologous chromosomes are separated.

Biology alleles question

Answers

Answer:

The answer is A. If the answer would've been B, that means the yellow allele would've been dominant over the red allele.

Red skin color: RR, Rr, or rR.

Yellow skin color: rr

which of the following organism does not require sunlight to live

Answers

Answer: Bacteria

Explanation:

Answer:

Bacteria are organism's that don't need any light or oxygen to survive

Explanation:

how does the mitochondria produce energy for the cell worksheet answers

Answers

Answer:

How does the mitochondria produce energy for the cell answers key?

Explanation:

Mitochondria are the powerhouses of the cell because they "burn" or break the chemical bonds of glucose to release energy to do work in a cell

206,745,613,012 + 13,007,989,996

Answers

Answer:

219753603008

Explanation:

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4. The solar wind is a stream of electrically charged particles that extend outward from the

sun's

a corona.

b. chromosphere.

c. photosphere.

d. core.

Answers

Answer is a (corona)

what essential chemicals do the light dependent reactions obtain from the light independent reactions

Answers

Explanation:

Light Reactions: Light-dependent reactions harness energy from the sun to produce chemical bonds, ATP, and NADPH. These energy-carrying molecules are made in the stroma where the Calvin cycle takes place.

The energy storage molecule ATP and the reduced electron carrier NADPH are produced by the light-dependent processes using light energy, which is required for the subsequent stage of photosynthesis.

What are the products of the light-independent reactions check all that apply?

In order to make ATP and NADPH, the light-dependent processes of photosynthesis must first collect energy from the sun.Then, these two molecules that store energy are employed in the light-independent reactions. Two different types of energy-carrier molecules, ATP and NADPH, store the solar energy in the light-dependent reactions.These molecules' stored energy is contained in the bond that binds one atom to the molecule.It is a phosphate atom for ATP and a hydrogen atom for NADPH. The cell has the material it needs to create carbohydrate molecules once the energy from the sun is processed and packed into ATP and NADPH.Carbon atoms will form the backbone of the carbohydrate molecules created. The protein ferredoxin receives electrons from the pigment P700 in its reaction center. Ferredoxin can then donate the electrons to either the electron transport chain to produce more ATP or to the electron carrier NADP+ to make NADPH. The pigment chlorophyll in the thylakoid membranes of the chloroplast is able to absorb solar energy during these reactions.The second stage of photosynthesis uses the molecules ATP and NADPH, which are temporarily transferred the energy to. Chlorophyll absorbs solar energy during the light-dependent reactions and transforms it into chemical energy that is then stored.The chemical energy obtained during the light-dependent reactions powers the construction of sugar molecules from carbon dioxide in the light-independent reactions. Plants require three elements for photosynthesis: carbon dioxide, water, and sunshine. The reactions that depend on light include those that use it to split water, create ATP, and NADPH.The processes that use ATP and NADPH to repair carbon dioxide in order to produce the three-carbon sugar glyceraldehyde 3 phosphate are known as light independent reactions. NADP, ADP, and water molecule reactants are used in the light reaction.After the light processes are finished, the molecules ATP, NADPH, and oxygen are produced, the last of which is already regarded as a byproduct of photosynthesis.

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What are some human activities that change the environment?

Answers

Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water

Other answers:

Overpopulation.

Pollution.

Global Warming.

Climate Change.

Genetic Modification.

Ocean Acidification.

Water Pollution.

Deforestation.

Climate change, and pollution, for example light pollution, noise pollution.

5. What enzyme makes it less likely that DNA will be lost from telomeres during replication?​

Answers

Answer:

Telomearse

Explanation:

question is in picture

Answers

Answer:

it can show a population pyramid  They also show the number of dependents (children and, sometimes, elderly people) and general structure of the population at any given moment. it compares and contrast  the age of th female and male where it typically forms the shape of a pyramid when the population is growing which can give you a  general idea on both genders it can help see who (female or male) are the most type in that area

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The example of the Great Barrier Reef is used to illustrate,
A) the insignificance of coral reefs
B) the lack of diversity in the ecosystem
C) the consequences of increasing acidity
D) the problems that too much algae can create

Answers

The example of the Great Barrier Reef is used to illustrate the consequences of increasing acidity. It is one of the wonders of the natural world.

The Great Barrier Reef represents one of the wonders of the natural world and the largest coral reef system worldwide.

This barrier extends from shallow estuarine regions to the deep marine environment, more than 14 latitude degrees.

Ocean acidification stops the development of the Great Barrier because Reef development is supposed to cease at pH 7.8.

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