Answer:
In a population of bacteria, variations exist due to mutation. The bacteria are subjected to antibiotics. Some bacteria die; others survive and reproduce. Eventually, the bacteria a resistant to the antibiotics.
Explanation:
explain the importance of ATP at cellular level
Which of the following terms describes a solution with a higher concentration of dissolved substances relative to another solution?
hypertonic
hypotonic
isotonic
polytonic
I believe it would be Hypotonic because is a solution in which the water concentration is high and the solute is lower than other solutions
Hypotonic is the term describes a solution that has a lower solute concentration and higher water concentration than another solution Hypertonic describes a solution with a higher solute concentration compared with another solution.
How was the grand canyon formed?
Select all of the answers that apply.
Which statements are true regarding the cosmological principle?
The universe looks the same from all directions, but can change and evolve over time.
The universe looks the same from all directions, and hasn't and won't change or evolve over time.
The universe can't be studied scientifically because scientists can't directly test their hypotheses.
Scientists can study the universe because the cosmological principle suggests that any physical laws or processes are the same for the entire universe.
Which description states a characteristic property of the noble gases?
A.
relatively unstable
B.
highly reactive
C.
colorful and shiny
D.
very stable
If Tyler does not eat a diet that includes essential amino acid's hair cells will not be able to build
The compound light microscope is most useful for viewing
detailed structures inside of cells
leaves, stems, and molds
surface details of a specimen
tissue samples and cells
Compound Light Microscope is a type of microscope made up of two lenses to obtain a high resolution of specimens. It has an ocular and objective lens and uses light as the source.
The correct answer is:
Option D. tissue samples and cells
The uses of compound microscopes are:
The microscope is used to visualize the specimen at a high resolution of 400 to 1000 X. It is due to the combined effect of two sets of lenses. The compound microscope is used to visualize the cells, scrapes, different types of cells, and microorganisms. Electron microscopes are used to visualize the detailed structure of the specimen, and also provide 3-D images of surface details of the specimen.
Thus, the correct answer is Option D.
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A compound light microscope is most effective at viewing intricate internal structures of cells and tissue samples. By magnifying the specimen's image, elements such as the cell nucleus, mitochondria, and ribosomes can be seen. It can also be used for histology but is not suitable for larger or surface structures.
Explanation:A compound light microscope is most useful for viewing detailed structures inside cells and tissue samples. It uses a system of lenses to magnify the image of a specimen, enabling us to observe small and intricate internal cellular elements like the nucleus, mitochondria, and ribosomes. However it also has broader applications in histology, the study of tissue structure. Using staining techniques, tissue samples can be thoroughly examined under this type of microscope. It is not as ideal for observing surface structures or larger objects like leaves, stems, and molds as they might be too large to view under this microscope.
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The four fundamental types of organic molecules are proteins, carbohydrates, lipids, and _____________. Question 14 options: phosphates salts nucleic acids sulfates
Answer:Nucleic acid
Explanation:
The four Fundamental types of organic molecules are
proteincarbohydrateslipidsNucleic acidNucleic acids are bio polymers composed of Nucleotide, very complex and large organic molecules.Nucleic acid is divided into four different levels
primarysecondaryTertiaryQuaternaryExamples of Nucleic acids are DNA,RNA.
Where in this area would a lake or marsh most likely form? A. A B. B C. C D. D
Answer:
Option (B)
Explanation:
Lakes and marshes are generally formed in the areas where the elevation is less. They are the region where the water bodies remain stagnant i.e. no flowing of water takes place. These are not a part of the huge oceans and are usually surrounded by land on all the sides. They can be comprised of salt water or fresh water and are comparatively larger than ponds in terms of size.
Thus, the point B is the most favorable location for the formation of lakes and mashes as it is located near the mean sea level.
Hence, the correct answer is option (B).
A bowhunter's quarry is antelope, deer, black bear, or other big game of similar size or smaller. Which shot offers a good chance for a clean kill?
Answer:
quartering-away
Explanation:
Quartering away is a bow shot which is often referred to cleanly kill animals such as the antelope, deer, black bear or other big game animals that have a size similar to or are smaller than the ones mentioned.The quartering away shot is preferred because it provides a clear aiming point for the hunter and thus, the chances of success increases.During this shot, the situation is such that the animals are looking away from the hunter and thus, the animal is said to be quartering away. This kind of shot provides the biggest kill zone and the probability of success becomes high.What is the primary energy system to fuel cycling at 70% of VO2 Max for 15 minuets?
The oxidative energy system is the primary source of ATP for cycling at 70% of VO2 Max for 15 minutes, utilizing carbohydrates and fats due to the aerobic nature and duration of the activity.
The primary energy system to fuel cycling at 70% of VO2 Max for 15 minutes is the oxidative energy system. This system is best suited for activities like cycling that last longer than 2 minutes and up to several hours. Although the immediate energy system can generate ATP quickly for explosive activities lasting about 10-20 seconds, such as sprinting, and the anaerobic system can sustain high-intensity activity for roughly 1.3-1.6 minutes, cycling for 15 minutes at 70% VO2 Max falls well into the time range that depends mainly on the oxidative system. This system utilizes carbohydrates and fats to produce ATP, and it becomes the most efficient source of ATP production as the exercise duration exceeds 2 minutes and as the heart rate and breathing rate increase to supply more oxygen to the muscles.
how are mass and volume alike and what is density?
Of the three states of matter, molecules are moving the fastest and are the farthest apart in a _____.
A.Solid
B.Liquid
C.Gas
Please answer fast!
Gas granules frequently hit with one another and the container's side as they move fast in all directions. As the temperature rises, the particles accumulate kinetic energy and quicken. Thus, option C is correct.
What are the movement of gas molecules?As the temperature rises, the particles accumulate kinetic energy and quicken. Due to their kinetic energy, the molecules of a gas, liquid, or solid are always in motion.
The collision of molecules occurs because they are constantly moving. The molecules travel in erratic paths as a result of these encounters.
The temperature and the particles' mass both have an impact on the actual average speed of the particles; at a given temperature, heavier particles move more slowly than larger ones.
Therefore, Of the three states of matter, molecules are moving the fastest and are the farthest apart in a Gas.
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what is the main component of the cell membrane? a. lipids b. carbohydrates c. cholesterol d. proteins
The main component of the cell membrane is lipids, specifically phospholipids. Hence, option a is correct.
Phospholipids form the core structure of the membrane, creating a bilayer that provides the basic fluid framework. However, it's important to note that other elements such as cholesterol, proteins, and carbohydrates also play crucial roles in the function and structure of the cell membrane. Cholesterol, for example, while also a lipid, helps to modulate the fluidity of the membrane and is found alongside the phospholipids. Proteins account for about 50% of the membrane's composition by mass and are involved in various functions such as transport, signaling, and structural support. Carbohydrates, comprising around 10% by mass, are attached to the exterior surface of lipids and proteins, playing key roles in cell recognition and adhesion as components of glycolipids and glycoproteins.
A platypus has 26 types of chromosomes. How many total chromosomes would be present in an intestinal cell from a platypus?
how have scientists determined the earth's core is composed of iron and nickel?
Final answer:
Earth's core is predominantly iron and nickel, inferred from seismic data, its density compared to the Earth's overall density, and its composition mirroring that of metallic meteorites. The solid inner and molten outer core composition, along with the generation of the Earth's magnetic field, supports a dense, metal-rich core.
Explanation:
Scientists have determined the Earth's core composition through various methods that overlap in the fields of seismology, geochemistry, and astrophysics. Seismic waves, created by earthquakes, have different speeds when they travel through solid and liquid matter, allowing scientists to characterize the inner and outer core. Observations show that the inner core is solid, primarily composed of iron and nickel, while the outer core is liquid, believed to be mostly molten iron potentially mixed with lighter elements such as sulfur and oxygen.
Another critical piece of evidence comes from the overall density of the Earth, as established by its gravitational effects and rotation, which suggests a denser metallic core when compared to the less dense surface layers. Additionally, the similarity in composition to metallic meteorites rich in iron and nickel supports the theory that these heavy elements sank to form the Earth's core during its early formation when the planet was still molten, and density stratification could occur.
Furthermore, the Earth's magnetic field, generated by the motion of electrically conductive material in the outer core, implies the presence of a metallic, iron-rich fluid. Laboratory experiments under conditions replicating the core's environment suggest iron alloys are conductive and match the observed density, thereby confirming a metal-based core and its role in geomagnetic phenomena.
what type of molecules diffuse through the cell membrane without using a channel protein ?
The molecules diffuse through the cell membrane without using a channel protein are as follows:
Gases (such as O₂ and CO₂), hydrophobic molecules (such as benzene), and small polar but uncharged molecules (such as H₂O and ethanol) are able to diffuse across the plasma membrane. Other biological molecules, however, are unable to dissolve in the hydrophobic interior of the phospholipid bilayer.Ions such as [tex]Na^+, K^+, Cl^-[/tex] can't get through due to their charge.Molecules such as glucose, sucrose, proteins, and starch cannot diffuse through cell membrane due to their large size.Learn more:
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Which one of these is not an example of intercellular communication?
A Bacteria share information about nutrients
B Ribosomes make protein
C Endocrine cells send hormones into blood
D Hypothalamus signals pituitary gland
A field geologist collected data for two nuggets of copper and determined their density. Which two pieces of equipment did the geologist most likely use to determine the density of the copper nuggets?
Answer:
The answer is b
Explanation:
which of these elements is essential to making up all organic molecules?
A. hydrogen
B oxygen
c. carbon
d nitrogen
Answer:
carbon
Explanation:
What stage of cellular respiration does not involve any carbon-based compounds as a reactant or product? Electron transport chain Krebs cycle Glycolysis Fermentation
Answer:
Option A , Electron transport chain
Explanation:
In Electron transport chain(ETC), no carbon based reactant or product are involved.
Usually in ETC (taking place in the inner membrane of the mitochondria), NADH and FADH2 releases high-energy electrons. Some energy of these electrons is capture while passing through the chain. This stored energy is then used for pumping hydrogen ions into the intermembrane space from the matrix.
Since in this entire process no carbon element is involved and hence, option A is correct
I NEED HELP W/ THESE QUESTIONS!!!
The subject of this question is biomolecules. In summary, carbohydrates are quick energy sources and are consumed heavily by athletes, proteins are involved in muscle development and the immune system, nucleic acids contain genetic material, and lipids are key for energy storage, insulation, and making up cell membranes.
This is a categorization task about biomolecules. Let's categorize each statement.
1. C: Carbohydrates are useful for a fast source of energy.
2. P: Proteins play a large role in muscle development.
3. N: A mutation in DNA, which is a nucleic acid, would initially start with it.
4. P: Enzymes, which speed up reactions, are proteins.
5. C: Carbohydrates contain elements C, H, and O and can often have a ring-like structure.
6. P: Proteins are involved in the immune system, such as antibodies.
7. N: The category of nucleic acids includes genetic material.
8. L: Lipids are helpful for long term energy storage.
9. C: If athletes 'pasta load,' they are consuming a lot of carbohydrates.
10. L: Lipids make up cell membranes.
11. L: Lipids are important for insulation.
12. L: Lipids contain long fatty acid chains.
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what are the correct labels for this diagram of glucose catabolism
Glucose catabolism entails breakdown of glucose and other simple sugars to release energy initiated in a process called glycolysis. Energy is extracted and stored in the form of ATP and NADH. The diagram representing this process should include glucose, ATP, NAD+, pyruvate and two stages of glycolysis.
Explanation:Glucose catabolism, also known as glycolysis, is represented in a diagram showing the breaking down of glucose (a six-carbon sugar) to extract energy. The labels for this diagram would likely include glucose, ATP, NAD+, ADP, P; because glucose, in combination with ATP, NAD+ and inorganic phosphate, breaks down into pyruvate, introducing ATP and NADH. The output of this process is two pyruvate molecules, two ATP molecules, and two NADH molecules.
Another relevant detail here is the incorporation of the simple sugars including galactose, fructose, glycogen, and pentose which are catabolized during glycolysis. Amino acids connect to this process through pyruvate, acetyl CoA, and components of the citric acid cycle. In aerobic conditions, pyruvate enters the Krebs cycle, leading to the production of high-energy FADH2 and NADH molecules which provide electrons to the oxidative phosphorylation process, generating more ATP molecules.
In your diagram, you should also indicate the two phases of glycolysis. The first part includes trapping of the glucose molecule in the cell and using energy to modify it so that it can be split into two three-carbon molecules. In the second phase, energy is extracted from the molecules and stored in the form of ATP and NADH. All these elements make up an accurate diagram of glucose catabolism.
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Explain the statement “ nutrients do not flow in one direction in the ecosystem, they recycle through the ecosystem “
Nutrients in an ecosystem are constantly recycled and reused through a biogeochemical cycle, involving both living organisms and non-living components.
Explanation:The statement 'nutrients do not flow in one direction in the ecosystem, they recycle through the ecosystem' means that nutrients in an ecosystem are constantly being reused and recycled. They do not flow in a linear direction but instead go through a cycle, being passed from living organisms to non-living matter and back again. This recycling process is known as a biogeochemical cycle, which involves both the living organisms and the non-living components of the ecosystem.
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What would happen to the circulatory system if the muscular system stopped working?
The muscular system aids in your ability to move, speak, and breathe.
What is Circulatory system?You would become entirely paralyzed if your muscular systems stopped working, and you would eventually cease breathing, which would result in no oxygen getting to your brain and decreasing blood pressure, which would finally lead to circulatory system failure and your death.
Since the muscular system regulates breathing and the circulatory system relies on oxygen to support the heart and other critical organs.
Blood arteries in the circulatory system move blood away from and toward the heart. Blood leaves the heart through arteries and returns through veins.
Therefore, The muscular system aids in your ability to move, speak, and breathe.
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How are kelp holdfasts similar to proper root systems?
A. anchor parts to stable positions
B. carry water to the body
C. carry nutrients from the body
D. use photosynthesis
Answer: A
Explanation: Unlike roots, holdfasts do not take in nutrients – they simply anchor the seaweed to a solid structure.
A scientist conducted one trial of an experiment and got unexpected results. How can the scientist increase confidence in the results?
A by repeating the experiment several times
B by changing the experimental procedure
C by asking other scientists what they think about the results
D by modifying the results so they are close to the expected results
Answer:
A by repeating the experiment several times
Explanation:
One of the main characteristics of the scientific research is the ability of running the experiments with the same circumstances and context several times, in order to be able to confirm the results of the research and by doing this if sometime a scientist gets a result too far away from the expected he can run again the experiment to see if the experiment wasn´t compromised.
Grasses → mice → cat → coyote As matter and energy move from grasses to coyotes the amount of available energy
a) Always decreases and population size always increases
b) Always increases and population size always decreases
c) Always decreases but population size may increase or decrease
d) Increases or decreases but population size remains the same
Answer:
The most reasonable answer would be c.
Hope I helped:)
Explanation:
Some plants release toxic chemicals that kill or harm nearby plants. What type of example is this?
A. cooperation
B. mutualism
C. competition
D. parasitism
Answer: C. competition
Explanation:
Competition can be define as the ecological relationship in which one species is more superior over the other in deriving resources. In competition usually one species live and the population of other species may either decrease in abundance, or may extinct.
The release of toxic chemicals by the plants to harm nearby plants is an example of competition. This is because of the fact that the plants may face competition with other plants for resources such as sunlight, water and minerals. Therefore, a physiological response will be generated inside the plants so as to kill the neighboring plants.
two ways water travels from land to enter the ocean
Final answer:
Water enters the ocean from land via runoff and groundwater flow, integral parts of the water cycle.
Explanation:
Two ways water travels from land to enter the ocean as part of the water cycle are through runoff and groundwater flow. Runoff occurs when water from precipitation like rain or melting snow flows over the surface of the land and into rivers, lakes, and eventually reaches the ocean. Groundwater flow refers to water that infiltrates the soil, becoming groundwater, which moves through the ground and discharges into the ocean, completing the cycle.