When a drug is discontinued, what percentage of that drug will remain in the body after three half-lives?
Answer:
About 12.5%
Explanation:
Every half life usually eliminates about half or 50% of drugs that is stored in the body system.
Therefore, after one half life, the percentage of drug stored in the body will be 50%, after two half lives it will be reduced by 50% which is 25%.
After three half lives, the percentage of drug stored in the body will also be eliminated by 50% which will be half of 25% and it will be 12.5%.
Therefore, the answer is 12.5%.
How are fossils found
Answer:
Fossils are found in harsh depth and heights as they had decayed many.centuries ago
Nucleic Acids functions /short answer
Answer:
Nucleic acid is an important class of macromolecules found in all cells and viruses
Explanation:
In a controlled experiment, which group experiences the test?
A. Instruments and equipment
B. Experimental group
C. Control group
D. Measurements and observations
Answer:
c. control group
Explanation:
hope it helps you
All of the following sciences contribute to Environmental Science
except.....
Biology
Chemistry
Engineering
Medicine
Answer:
medicine
Explanation:
medicine relates to the treatment of diseases/aliments of life.. environmental science can involve abiotic factors as well
Positive ion formed when an atom LOSES electrons
Answer:
yes
Explanation:
and vice versa.
protons can never be gained or lost only electrons are mobile
Answer:
yes
Explanation:
it can lose or gain electrons during this event
Which are limiting nutrients for plant growth?
O water and nitrogen
O nitrogen and carbon
O carbon and phosphorus
O phosphorus and nitrogen
Answer:
▪︎Phosphorus and Nitrogen.
Nitrogen and phosphorus are limiting nutrients for plant growth.
They are often present in small quantities locally or are present in a form that cannot be used by the plant.Two elements considered as limiting autotroph growth in most ecosystems.What is an ecosystem?An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life. Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts.- Biotic factors include plants, animals, and other organisms.
- Abiotic factors include rocks, temperature, and humidity.
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Jenny is preparing a presentation about volume for her science class. She writes down the following notes about volume:
–Volume is constant for solids since they have a shape.
–Volume varies for liquids and gases since they do not have a shape.
–Volume may be measured in many ways.
–Common units of volume include cubic centimeters, milliliters, and liters.
When giving her presentation, Jenny notices there is a mistake in her notes. Which is the mistake in her notes?
Solids do not necessarily have a shape.
The volume for liquids is constant.
Volume is always measured using a graduated cylinder.
Common units for volume also include cubic grams.
Answer:
b
Explanation:
What is the life cycle of a kakahi?
The idea that species are defined based on the ability to interbreed with each other and exchange genes is the basis of which species concept?
Answer:
Biological Species concept
Explanation:
Biological Species concept is known as the idea that species are defined based on the ability to interbreed with each other and exchange genes.
This is because interbreeding enables exchange and preservation of the genes which makes a species unique. This is why species often share a very similar characteristics with the parents and other offsprings.
Compare the structure of prokaryotic and eukaryotic organisms.
Answer:
Explanation:
Eukaryotic cells are cells that contains a membrane bound organelles this include the nucleus while prokaryotic cells do not have a membrane bound nucleus.
Eukaryotic cells have more than one One chromosome while prokaryotic cell has one chromosome that is not true chromosome.
Eukaryotic cell have a multicellular cell type while prokaryotic cell have a unicellular except for some cyanobacteria that may be multicellular.
Cell wall is present in eukaryote only in plant cells and fungi and it chemically simpler while prokaryote cell wall is Usually chemically complex
a and b are complementary angles a measure 59 degrees
Answer:
b = 31 degrees
Explanation:
One of the most important bioethical issues facing us today is the issue of ____________ , or a loss thereof.
Answer:
The correct answer is - biodiversity.
Explanation:
Bioethics is a part of ethics that has concerns and problems with the continuous use and development of biological tools and technology which has a negative effect on the environment.
It is the single most important bioethical issue today that effect on the biodiversity that includes different type of lives present on earth in the various number of species.
Thus, the correct answer is - biodiversity.
PLEASE HURRY A student is interested in the behavior of fish. He has 4 identical fish bowls and 20 goldfish. He places 8 fish in one bowl, 6 in the next, 4 in another and 2 in the last. Each bowl is placed in a lighted room with a temperature of 75 degrees Fahrenheit and he observes the behavior of all of the fish. What is the independent variable in this experiment? a The number of fish in each bowl b The type of light c The behavior of the fish in each bowl d The temperature
Answer:
(a) number of fish in each bowl
Explanation:
independent or manipulating variable is what you can control in this situation the student can control how many fish are in each bowl
The image below is a model showing how chromosomes and DNA are structured within a cell.
W
X
Y
Z
Which letter represents a gene?
Answer:
Z is gene.
Explanation:
W is nucleus
X is chromosomes
Y is DNA
3. Scientists must understand that
a. science cannot provide answers to all questions.
b. scientific ideas are fact, and can never be revised.
c. sound scientific ideas are frequently altered.
d. nature is a constantly changing wonder, difficult to understand.
Answer:
A
Explanation:
Scientists must be aware of this that science cannot offer solutions to every issue, hence option A is correct.
What is a scientific hypothesis?A hypothesis is a potential solution to a problem in science, but it isn't just any solution. A hypothesis needs to be rational and supported by scientific information.
Falsifiable claims must be made in science, this implies that they might be tested, and there must be some conceivable observation that may disprove them.
Therefore, a hypothesis or theory seeks to explain or interpret facts, but a scientific fact is, in its most fundamental definition, an objective and verifiable observation, hence option A is correct.
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Identifying Benefits of Social Behavior
What are the benefits of social behavior? Check all that apply.
protection
foraging
competition
reproduction
division of labor
The benefits of social behavior are protection, foraging, reproduction, and division of labor.
What do you mean by Social behavior?Social behavior may be defined as all kinds of interactions between individuals of the same species from cooperation to antagonism.
Social behavior protects the weak or lazy individuals of the species when they are found in groups. It increases the chances of selection for reproduction.
Due to social behavior, it divides the task of labor among the members of the same species. It increases the chances of searching of food but limits the amount of food to eat.
Therefore, the benefits of social behavior are protection, foraging, reproduction, and division of labor.
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Answer: protection, foraging, reproduction, and division of labor
Explanation:
What is the expected result of a nation whose population is outstripping its resources and ability to feed its people, if its people cannot migrate peaceably?
Answer:
a lot of sickness, homelessness and deaths
Explanation:
make up some reasons for those. It's pretty self explanatory.
The expected result of a nation whose population is outstripping its resources and ability to feed its people, if its people cannot migrate peaceably - disease, habitat loss, and fatality.
Result of outstripping resources
If the nation is experiencing outstripping or loss of resources and ability to feed its citizens, and if they are not able to migrate peaceably that will result in diseases or sickness due to hunger, homelessness and illegally moving to different places.
Such a case is seen in Mexico where people move from south America for better livelihood as there is a scarcity of resources. This scarcity of food and resources leads to deprivation of shelter, a hunger that can lead to death as well.
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what specialized cells are contained in the epithelial tissue?
Answer:
Explanation:
Particular structures found in some epithelial cells are an adaptation to ... a form of specialized stratified epithelium in which the shape of the cells can vary.
Branch that deals mostly with things that were never alive.
I think it's called "Inorganic Chemistry". In which it deals with compounds that do not contain carbon, but can sometimes contain hydrogen.
Hope this helps
what happens to molecules as heat gets added
Answer:
the molecules and atoms vibrate faster
Explanation:
Which contributes to a population at zero population growth? A) Deaths outpace births. B) Births outpace deaths. C) Carrying capacity is exceeded. D) Birthrate equals the death rate.
Answer:
D
Explanation:
both are equal to the is zero pop growth
look at the data in the table to the right then answer the question that follows based on the data in the table what conclusion can you draw about the energy needs of different cells
cell type|typical animal cell|skin|muscle|liver|
other side of graph
number of mitochondria|1000, -2000|200|>2000|>2000
Answer:cells that need more energy, like muscle cells, have more mitochondria
Explanation:
Answer:
all cells
Explanation:
The diagram shows a model of an animal cell. Explain how you’d modify the model to show the structures in a plant cell.
Answer:
To show the structures of a plant cell, add a cell wall around the membrane and increase the size of the vacuole inside the cell. Draw green ovals to represent chloroplasts.
Explanation:
answer on edmentum
To modify the model of a given animal cell into a plant cell, it is required to add the cell wall around the cell membrane. It is also mandatory to construct large vacuoles in the cytoplasm with cell organelle chloroplast.
What is a Plant cell?Plant cells may be defined as the type of eukaryotic cell that are the basic unit of life in organisms of the kingdom Plantae such as green plants, photosynthetic algae, etc.
The diagram illustrates the animal cell and asked to modify this into the plant cell. So, there is a requirement to add or edit this cell with plant cell organelles and its characteristics like cell wall, presence of chloroplast, large central vacuoles, etc.
Therefore, it is well described above.
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Describe the importance of chemical elements to living organisms
Answer:
Chemicals make up the bodies of living organisms, all require H20, cells consist of 75% water. Organisms are made of matter (composed of chemical elements). ... An element that is essential for life but required in small amounts.
Explanation:
Chemicals make up the bodies of living organisms, all need [tex]H_2O[/tex], cells that are 75% water. Organisms are made of matter which is made of chemical elements.
What are Chemical Elements?A chemical element is defined as a chemical substance that cannot be broken down into other substances where the fundamental particle of a chemical element is an atom, and chemical elements are distinguished from each other by the number of protons in the nuclei of their atoms. goes.
Carbon, oxygen, hydrogen, gold, silver and iron are examples of chemical elements where each element has only one atomic form. Elements can combine with each other to form a wide variety of more complex substances called compounds where the number of possible compounds is almost infinite where there are probably a million known and more are being discovered every day.
Thus, Chemicals make up the bodies of living organisms, all need [tex]H_2O[/tex], cells that are 75% water. Organisms are made of matter which is made of chemical elements.
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Are all compounds molecules
Answer:
Every combination of atoms is a molecule. A compound is a molecule made of atoms from different elements. All compounds are molecules, but not all molecules are compounds.
define transpiration
Answer:
is the process of water moving through a plant.
Explanation:
Explanation:
Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems, and flowers. Water is necessary for plants but only a small amount of water taken up by the roots is used for growth and metabolism. The remaining 97–99.5% is lost by transpiration and guttation.
which two
reservoirs are part of the
short-term carbon cycle?
When water and mercury are placed in glass tubes, the water in the right tube)
adheres to the sides of the tube. The mercury (in the left tube) forms a rounded
surface at the top of the liquid. Which of these substances has greater cohesion
than adhesion? Explain your answer.
Answer:look at the image and everything’s on there
Explanation:
Mercury has greater cohesion than adhesion.
What is adhesion?The attraction between two distinct phases is known as adhesion. Adhesion cannot be explained by a single theory, however it is frequently split into two categories: mechanical interlocking and physical and chemical bonding. Adhesion often results from a mixture of the several mechanisms described below.
When two dissimilar phases only attach to one another mechanically, mechanical interlocking occurs. Typically, for the other material to penetrate, the surface needs to be a little bit rough. adhesion processes
For instance, a low viscosity glue that easily penetrates surface pores and fissures. After the adhesive has dried, this causes mechanical anchoring between the two components.
Therefore, Mercury has greater cohesion than adhesion.
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A fat contains which molecular components? A fat contains which molecular components? two fatty acids and one glycerol molecule three fatty acids and one steroid1 molecule three fatty acids only three fatty acids and one glycerol molecule
Answer: thee fatty acids and one glycerol molecule
Explanation:
A fat molecule consists of two kinds of parts: a glycerol backbone and three fatty acid tails. Glycerol is a small organic molecule with three hydroxyl (OH) groups, while a fatty acid consists of a long hydrocarbon chain attached to a carboxyl group. A typical fatty acid contains 12–18 carbons, though some may have as few as 4 or as many as 36. - from Khan academy