2. What is the pH of a very acidic solution?
a:5
b:10
c: 1
d:14
Knowing the half-life of carbon-14 enables scientists to
Plzz help ASAP
Answer:
Calculate the age of an object by finding how much carbon-14 remains in the sample
Which of the following factors decreases blood flow?
Decrease in blood viscosity
Increase in blood pressure
Increase in the resistance of a blood vessel
Increase in overall blood volume
Answer:
increase in the resistance of a blood vessel
Explanation:
if there's more resistance then it's decreasing. like friction
PLS HELP!!!
Cells are capable of reproducing themselves by cell division. For single celled organisms, cell division is essentially reproduction. For multicellular organisms, division is necessary for growth and renewal. Even though cell division is natural and necessary, what happens when the rate of cell division becomes too rapid and out of control? How can we get rid of such rapidly dividing cells in the human body?
Answer:
Here are 5 important things you should know about cancer cells:
1. Everyone has cancer cells in their body. These cells are not detected in routine tests until they have multiplied and grown to billions of cells.
2. Cancer cells are present in the body about 6-10 times in a person's lifetime.
3. When the immune system is healthy, cancer cells will be destroyed, preventing tumor growth and formation.
4. When a person has cancer, it means that he or she may be suffering from severe nutritional deficiencies or due to toxic environmental factors, unhealthy lifestyles and diets.
5. An effective way to fight cancer is to starve cancer cells by not providing them with the food they need to proliferate and grow.
"3 golden rules" help kill cancer cells:
1. Diet to prevent cancer
It can be said with certainty that there is no better way to keep your immune system healthy than with a reasonable and scientific diet. So ask yourself the question "Do you really have a reasonable diet to prevent cancer?". And here are the essential suggestions.
- Increase your diet with fresh vegetables, fruits, whole grains and foods high in fiber.
Eat more antioxidant foods: The fruits below are rich in antioxidants.
In addition, all vegetables and fruits contain a lot of vitamin A (carrot, papaya, tomato, sweet potato, pumpkin), vitamin C (orange, cherry, kiwi, strawberry), vitamin E (avocado, papaya). , cashews, peanuts, sunflower seeds, almonds...) are also foods with strong antioxidant capacity to help prevent cancer.
- Increase vitamin D supplementation.
Vitamin D is a special vitamin that is more important than all other vitamins because of its "universal" effect on the body's immune system. Its biological effects are related to the expression of more than 3000 genes in the body.
In addition to the extremely important role for the musculoskeletal system, the role of vitamin D in the prevention of many cancers and infectious diseases has been scientifically proven.
More than 90% of vitamin D in the body is synthesized in the skin under sunlight. Very little is absorbed from the diet, so the daily diet cannot guarantee the full amount of vitamin D needed by the body.
A recent study by a joint research team between the 108 Central Military Hospital and the University of Tuebingen (Germany) published in the journal BMC Infectious diseases showed that about 90% of healthy people are deficient in this vitamin. plasma vitamin D concentration <30 ng/ml).
Research also shows that there is a strong association between vitamin D deficiency and liver cancer in patients infected with hepatitis B. So the simplest way to ensure that you do not have a deficiency is to take vitamin D supplements. daily dose of 10-20 (µg/day) for all ages.
- Do not eat a lot of sugar and sweets because this is a food source that helps tumor growth. Sugar, not protein, is what tumors need to grow, so people with cancer still need the protein found in meat to boost their health against cancer. However, it should be noted that you should not eat a lot of red meat but should eat chicken and fish instead of beef and pork.
2. Increase physical activity
This is the most important principle of strengthening the immune system that anyone can do. The largest study conducted by the National Cancer Institute (USA) on more than 1.4 million people found that regular physical activity reduces the risk of 13 common types of cancer in humans.
The link between physical activity and reduced risk of many types of cancer can be explained by several key mechanisms:
- Strengthen the immune system, prevent the growth and spread of infectious agents.
- Physical activities help increase metabolism, improve circulation and help transport oxygen to all organs. Cancer cells must not grow in an oxygen-rich environment because oxygen can kill cancer cells.
Lowering levels of hormones such as insulin, estrogen and growth factors are thought to be closely related to cancer formation and development.
- Control weight, prevent obesity: Obesity is a leading risk factor for many types of cancer, metabolic disorders, cardiovascular diseases... It is estimated that more than 500,000 cancers are diagnosed each year. obesity-related diagnoses.
Increased blood flow to organs such as the liver, kidneys and intestines enhances the efficient elimination of waste products and toxins that can be potential causes of cancer from the body.
differentiate between Angiosperms and gymnosperm
Answer:
Angiosperms are vascular plants bearing the seeds in fruits or mature ovaries whilst gymnosperms are other types of the plant which bears the seeds directly on the sporophylls but without any cover.
Explanation:
Examples of gymnosperms include cypress,pine, redwood, spruce and ginkgo.
Examples of angiosperms include apple, banana,peach, cherry and orange.
Also, angiosperms are seeds producing flowering plants whose seeds are enclosed within an ovary.
Gymnosperms are also seeds producing non flowering plants whose seeds are unenclosed.
Hope it helps.
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4. Estimate the size of the outlined (yellow) onion cell under high power (40x). Use the dFOV values calculated from question no. 3. 10 points
The following formula is useful to determine the size of the cell ⇒ Size of the object = FOV / Fit number = dFOV / Fit number. If you have this data, you can estimate the size of the onion cell. According to the values we used, the estimated size of this onion cell is 112 μm.
-----------------------------------------------
Cells are too small to measure their sizes, so to know their actual size, we can make mathematical estimations to know their sizes, or we can use software programs. In this case, we are estimating their size using the following formula,
Size of the object = FOV / Fit number = dFOV / Fit number
Size of the object = size of the cellFOV = eyepiece (mm)/objective magnification Fit number = The number of times the object -cell- fits in the field of viewTo answer this question, we will replace the terms in the given formula.
→ First, we will get the FOV value. From references, we can assume that
under 4X ⇒ FOV = 4.5 mmunder 10X ⇒ FOV = 1.8 mmunder 40X ⇒ FOV = 0.45 mmYou can also calculate the FOV by using a millimeter paper or rule.
Note: We will use these values to replace terms in the formula, but you can use the dFOV value calculated in question no. 3.
→ Second, we will count the number of cells that fit the field. We can see about four cells across the field of view.
→ Finally, we will replace the terms in the formula.
Size of the object = FOV / Fit number
Size of the object = 0.45 mm / 4
Size of the object = 0.112 mm
Since we generally use μm when referring to cell sizes, we need to multiply 0.112 x 1000 to get the size of the cell expressed in μm.
Size of the cell (μm) = 0.112 mm x 1000 = 112 μm
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Alien recipe virtual Arkansas
Answer:51
Explanation:
I will give branliest
5. Read the sentence, find the error and rewrite it.
Trypsin secreted by salivary glands digests the carbohydrates and it is also
called as Salivary amylase
Salivary amylase is a glucose-polymer cleavage enzyme that is produced by the salivary glands.
The cells of a grasshopper contain DNA. The grasshopper could be alive because it displays which sign of life?
A.response to the environment
B.
information system
C.
complex chemical activities
D.
reproduction
Answer:
B.)information system
i hope it's helpful
identify iron by its properties
Iron is a lustrous, ductile, malleable, silver-gray metal (group VIII of the periodic table). It is known to exist in four distinct crystalline forms. Iron rusts in damp air, but not in dry air. It dissolves readily in dilute acids.
Standard potential: - o.44 V (Fe2+/ Fe); 0.77 V ...
Density: 7.8 g.cm-3 at 20°C
Melting point: 1536 °C
Ionic radius: 0.076 nm (+2); 0.064 nm (+3)
HELP PLEASE!!!!!
Compare a virus to a unicellular organism. (1 point)
O Viruses need energy, unicellular organisms do not need energy.
O Unicellular organisms have a cell membrane made from a lipid bilayer, viruses have a protein coat
O Viruses reproduce through asexual reproduction; unicellular organisms need a host cell,
O Neither unicellular organisms nor viruses respond to stimuli.
Answer:
differences : Viruses need energy while unicellular organisms donot need energy
Unicellular organism has cell membrane but virus has protein coat.
Unicellular organisms have a cell membrane that is made from a lipid bilayer whereas viruses have a protein coat which is called capsid. Unicellular organisms reproduce through asexual reproduction whereas virus need a host cell for their survival because virus use the cell engine to extract food for their survival so it is conclude that unicellular organisms have cell membrane but virus has protein coat.
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Cells are made of organelles, specialized structures that each perform specific functions that help the cell maintain homeostasis. This is much like the body systems work together to help the body maintain homeostasis. Consider the function of the nervous system. Which organelle is most similar in function?
Answer:
Organelles serve specific functions to keep a cell alive.
Explanation:
Organelles are specialized structures that perform various jobs inside cells. The term literally means “little organs.” In the same way organs, such as the heart, liver, stomach, and kidneys, serve specific functions to keep an organism alive, organelles serve specific functions to keep a cell alive.
Answer: D i just took the test
Explanation:
Someone plz help me :(
Answer:
c
Explanation:
Which of these correctly demonstrates the biomolecule with its function?
A)
steroids; separate the cytoplasm from the environment
B)
waxes, prevents water loss and repels water
c)
triglycerides; make up sex hormones
D)
phospholipids, store energy
Answer:
B) Waxes, prevents water loss and repels water
Explanation:
Waxes, steroids, phospholipids, and triglycerides are types of lipids. All of them are made of Hydrocarbon chains that are hydrophobic.
Triglycerides (fats) - Storage molecules for the body's energy
Steroids - Sex hormones and cholesterol
Phospholipids - Cell membrane (Separates cytoplasm from the environment)
Therefore, Answer choice B) Waxes, prevents water loss, and repels water, is the only answer that correctly matches with the provided answers.
5. A hungry person had a meal, after which the concentration of glucose and amino acids in the blood were determined. This was measured hourly as the blood passed through the hepatic portal vein and the iliac vein in the leg. The results were as shown in the table below. Time (Hrs) Concentration of contents Hepatic portal vein (Mg/100ml) Glucose Amino acids Glucose 85 1.0 1 85 1.0 85 140 1.0 125 1.5 3 130 1.5 110 3.0 4 110 1.5 90 5 90 3.0 90 6 90 2.0 90 7. 90 1.0 90 in Concentration of contents in the iliac vein of the leg (Mg/100ml) Amino acids 85 1.0 1.0 1.0 ou WNHO 2.0 1.0 1.0 a) Using the same axes draw graphs of concentration of glucose in the hepatic portal vein and the iliac vein in the leg against time (7mks) b) Account for the concentration of glucose in the hepatic portal vein from; i) 0-1 hour (2mks) ii) 1-2 hours (3mks)
Answer:
sorry for doing this but in my opinion doubt nut app is better then this
Answer:
wait im confuse?
Explanation:
what happens if an organelle stops working
if an organelle stops working the cell will no longer be able to excrete proteins or other molecules.
The production of offsrpings is a charatericities of life that enables the continuation of a species.
Answer:
"Reproduction" is a characteristic of life that enables the continuation of a species
Explanation:
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Match each term to its description.
Match
Term
Definition
Conservation
A) The process of wearing down, becoming weaker
Degradation
B) Animals eating vegetation at a rate faster than it can grow back
Exploitation
C) Saving of a resource by managing how it is used
Overgrazing
D) Unfair and unequal treatment of people or use of resources
The process of wearing down a substance leads to degradation, and the process of eating vegetation by the animal at a faster rate is called overgrazing. Thus, the correct options are A. 2, B. 4, C. 1, and D. 3.
What is degradation?Degradation is the process of wearing down the substance by the action of air, water, etc. which leads to erosion and weakening resulting in the formation of smaller particles. Hence, A. 2 is correct.
When the animals eat vegetation at a higher rate than their production causes the loss of food and decreases the carrying capacity in the process called overgrazing. Hence, B. 4 is correct.
Conservation is the process of saving resources by their effective uses, and exploitation is the unequal and unfair treatment and use of the resources and organisms. Hence, C. 1, and D. 3 are correct.
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2
If you are unsure of the accuracy of your data set. What is one way that you can feel more confident?
A Collect more data through further experimentation
B Take data from other experimenters
Extrapolate data based on what you think should happen
Ask a friend to read over it
write 4 over 6 in expanded form
Answer:
4 + 0/ 6 to the 1st power
5. What are two main things that are unique to the Troposphere?
A)people live in this layer and the weather occurs here
B)meteors burn up and it's the coldest layer
C)the International Space Station Orbits in this layer and it has the highest
temperatures
D)none of the above
Answer:
The two main things are:
A) people live in this layer and the weather occurs here
B) meteors burn up and it's the coldest layer
How are biomes related to ecosystems?
Answer:
Biomes are large regions of the world with similar plants, animals, and other living things that are adapted to the climate and other conditions
Answer:
Biomes are large regions of the world with similar plants, animals, and other living things that are adapted to the climate and other conditions. An ecosystem is often much smaller than a biome, although the size varies. Ecosystems are the interactions between the living things and the nonliving things in a place.
Explanation:
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Question 2 (Matching Worth 4 points)
(01.02 LC)
2
Match each term with its description
Match
Term
B
Biosphere
Definition
A) A place in an ecosystem where an organism normally lives
D
Ecosystem
B) Includes all living things and the areas in which they live
С
Biome
C) A large geographical area classified by its climate and the plant
and animal life within it
A
Habitat
D) Includes all living things functioning together with the physical
factors of their environment
s Question
Answer:
b
c
d
a
Explanation:
The matching of each term with respect to its description is as follows:
Biosphere: is a place in an ecosystem where an organism normally lives. Ecosystem: includes all living things functioning together with the physical factors of their environmentBiome: is a large geographical area classified by its climate and the plant and animal life within itHabitat: includes all living things and the areas in which they live. What is an Ecosystem?An ecosystem may be defined as a place or an area where members of different species live together and interact with one another for the purpose of food, shelter, and space.
The Ecosystem comprises all biotic and abiotic factors of any geographical location. The Biosphere only includes the living forms where they efficiently live and play their roles. Habitat is the area where a particular type of organism is best adapted due to natural selection.
Therefore, the matching of each term with respect to its description is appropriately described above.
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What are proteins made of? *
sugars
glycerol and fatty acids
amino acids
nucleotides
Answer: Amino acids
Explanation:
The building blocks of proteins are amino acids. They are small naturally-grown molecules that include an alpha carbon atom connected to an amino group, a carboxyl group, a hydrogen atom, and a variable component.
Side Chain
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Explain the theory of plate tectonics and how they have changed Earth’s surface over time. Include the role of plate tectonics in the creation of landforms. suort awser
Answer:
The movement of these tectonic plates is likely caused by convection currents in the molten rock in Earth's mantle below the earth crust...Explanation:
The movement of these tectonic plates is likely caused by convection currents in the molten rock in Earth's mantle below the crust. Earthquakes and volcanoes are the short-term results of this tectonic movement. The long-term result of plate tectonics is the movement of entire continents over millions of years... please marks me as brainliests for my effort....Explain how observation, interpretation, and explanation are important to the study of science.
Answer:
Observation is essential in science. Scientists use observation to collect and record data, which enables them to construct and then test hypotheses and theories. Scientists observe in many ways – with their own senses or with tools such as microscopes, scanners or transmitters to extend their vision or hearing.
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From memory List the characteristics of life
Answer:
Explanation:
There's a nice mnemonic: mrs gren
movement
reproduction
sensitivity
nutrition
excretion
respiration
growth
Answer:
have cells
use energy
reproduce
respond to the environment
grow and develop
Explanation:
the statment "the worm is 2 centime=eters long" is an?
Answer:
Adjective
Explanation:
The worm is being described to be 2 centimeters long.
In the early 1900s toxic substances such as ammonia (NH3) and sulfur dioxide (SO2) were used in
1
refrigerators as
Answer:
propellants
Explanation:
they were used to make aerosols sprays in aluminum spray cans
Water is considered a polar molecule. What does this mean?
Answer:
It means that there is an uneven distribution of electron density.
Explanation:
