C is the correct answer.
the information must always be verifiable, but it can still be secondary data rather than primary.
Answer: C. It must be unbiased and verifiable.
Explanation:
The information which is unbiased and verifiable can be considered as most important when deciding it's use. This is because of the fact that the biased information may be generated by manipulation, can be inaccurate or unreliable. The information should be verifiable which means it can be rectified using several sources and experimental trials.
Pleaseeeeeeee help......
What is a reproductive strategy?
A. The number of alleles an organism passes on
B. The DNA that is passed onto an offspring
C. The adaptations that an offspring passes on
D. The method an organism uses to produce offspring
Answer:
Reproductive strategy is the method an organism uses to produce an offspring.
Explanation:
The mode of reproduction and the number of reproductive phases in an organism’s lifetime all are reproductive strategies. Organisms can reproduce sexually as well as asexually. In some organisms reproduction occurs just once in their lifetime. Reproduction marks the end of their lifetime.
Thus the number of offspring they produce would be also large. Such kind of reproduction is called semelparous reproduction. But in iteroparous reproduction an organism has several reproductive phases in its lifetime .
What is the difference between an aggressive and non-aggressive tumor?
A. Non-aggressive tumors will spread quickly.
B. Aggressive tumors will spread quickly.
C. Aggressive tumors will spread slowly.
D. Non-aggressive tumors will eventually stop replicating.
Answer:
B. Aggressive tumors will spread quickly.
Explanation:
The difference between an aggressive and non-aggressive tumor is aggressive tumors will spread quickly.
Aggressive = Mad or Fast
Non-aggressive = Slower pace or Normal rate
What is one reason the membrane proteins could not go where the Davson-Danielli model thought they should go, sandwiching the lipid membrane on either side?
The reason why proteins aren't sandwiched on either side of the lipid membrane according to the Davson-Danielli model is due to the fluid mosaic model which explains that proteins, and other membrane components, can move and change positions within the membrane.
Explanation:The main reason why membrane proteins could not go where the Davson-Danielli model thought they should go, sandwiching the lipid membrane on either side, is due to the discovery of the fluid mosaic model proposed by S. J. Singer and Garth L. Nicolson in 1972.
This model provided a more accurate representation of the membrane's structure, indicating that the proteins, phospholipids, and other components were not fixed in a 'sandwich' style but instead had the ability to move and change positions within the membrane while still maintaining its basic integrity.
Furthermore, the plasma membrane is not symmetrical. There are considerable differences in the array of phospholipids and proteins between the interior and the exterior of the membrane.
Also, certain proteins serve to anchor the membrane to fibers of the cytoskeleton, some bind elements of the extracellular matrix, while others, especially transmembrane proteins, provide pathways for charged particles to move across the membrane. Membrane fluidity is another factor that inhibits proteins from being statically sandwiched on either side.
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Membrane proteins cannot go where the Davson-Danielli model thought they should go because they need to be able to diffuse laterally in the membrane. The fluid mosaic model explains this by stating that proteins and lipids in the membrane can move with respect to one another.
Explanation:The Davson-Danielli model proposed that membrane proteins are sandwiched between the lipid membrane on either side. However, one reason why membrane proteins cannot go where this model thought they should go is because they need to be able to diffuse laterally in the membrane for proper functioning. The fluid mosaic model, proposed by Singer and Nicolson, explains that proteins and lipids in the membrane are loosely attached and can move somewhat with respect to one another.
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A machine can never be 100% efficient because some work is always lost due to
Answer:
Friction
Explanation:
The efficiency of a machine depends upon the percentage ratio of output work to the input work. More the difference between the input and output work, lesser will be the efficiency of the machine. In real machines, the output is always less than the input because a lot of work is consumed against friction, resulting in reduced output.
The formula for efficiency is:
Efficiency= ( Output work/Input work) x 100%
Since the output will always be lesser than the input, the ratio of output/input will always be lesser than 1 and, therefore, the efficiency will always be lesser than 100%
Answer:
FRICTION
Explanation:
During cellular transport, which of the following forms of passive transport deals with transporting water through a membrane instead of the molecules themselves?
A. active transport
B. aquatic transport
C. hydrolysis
D. osmosis
Answer:
D. osmosis
Explanation:
Osmosis is the process of transporting water through a semipermeable membrane, in order to make the concentrations on either side equal.
Answer:
Osmosis (Ans D)
Explanation:
Passive transport is naturally occurring phenomenon of diffusion (movement) of molecular substances or ions cross the cell membrane without any input of cellular energy, it can easily pass through cell membranes.
Osmosis : In osmosis when a substances (solvent molecules) pass through semipermeable membrane into a solution in order to balance the concentration of another substance.
An extreme disturbance happens in an ecosystem. How does an ecosystem change as succession happens after this disturbance?
When there is an extreme disturbance in the ecosystem, it means a general destruction of it, thus experiencing a mass extinction. Once this happens, there's usually just barren ground left. Since the barren ground doesn't provide suitable living conditions for most of the living organisms, the ones that need the lest resources to survive create the primary succession, usually the mosses and lichens. The organisms of the primary succession provide biomass, so the ground is mixing with it, thus new soil is forming. Once this happens, smaller plants and animals start to settle in, thus the secondary succession occurs. The animals and plants of the secondary succession enrich the soil, and set the basis for more complex ecosystem, so soon after larger plants and animals start to settle in.
Answer:
Biodiversity in the ecosystem increases
What is meant by the following statement?
The cell membrane is said to be fluid.
A. It moves sideways.
B. It fills up with water.
C. It remains very rigid.
D. It looks like a liquid.
Answer:
D
Explanation:
The cell membrane behaves like a liquid even becoming more fluid with an increase in temperatures. This is due to its compostion of a phospholipid bilayer with embedded molecules within it (such as cholesterol and cell membrane proteins). The embedded moleculea are not locked in one position and can move position along the membrane like an particle in water proven by The Frye-Edidin experiment.
Answer: A. It moves sideways.
Explanation:
15. Which of the following statements is best
supported by the information in the graph?
O A. Pebbles are able to be moved at slower
stream velocities than silt particles.
O B. Streams are only able to move particles
less than 1 cm in diameter, and all other particle
sizes can only be moved in rivers.
O C. Particle diameter controls stream velocity
across all scales.
O D. Small increases in stream velocity can lead
to many changes in particle size at slower
velocities, but changes in larger particle sizes
require more significant changes at higher
velocities.
Which of the following statements is considered true of Neanderthals?
A. They had some system of religious beliefs about afterlife.
B. They evolved into homo sapiens.
C. They had smaller brains than homo sapiens (modern humans).
D. They emerged after the ice age.
Answer:
A. They had some system of religious beliefs about afterlife.
Explanation:
Answer:
They emerged after the ice age.
Explanation:
Neanderthals are also known as Homo neanderthalensis. The earliest fossils of neanderthals was found in Europe and dated 450,000 and 430,000 years ago. They were expanded into central Asia and south west.
Scientists believed that neanderthals lived 120,000 in Europe and emerged in the cold ice age. The became extinct as the cold ice age was converted into the warm climate.
Thus, the correct answer is option (D).
The atomic mass of the most common isotope of carbon is _______.
The element with an atomic number of 4 is _______.
_______ exist in orbitals around the nucleus.
Oxygen has _______ protons in the nucleus.
An isotope of an element has the same number of protons but a different number of _______.
Isotopes differ in number of neutrons.
Carbon is an element found in group 14 of the periodic table. It's common atomic number is 12. It also has other isotopes.
The element that has atomic number 4 is Beryllium. The electrons in an atom exist in orbitals around the nucleus.
Oxygen has eight protons in its nucleus. An isotope has a different number of neutrons.
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Answer:
1. 24
2. Beryllium
3. electrons
4. eight
5. neutrons
Explanation:
Which of the following is not a benefit of Photosynthesis? A. Organic molecules for growth are created. B. Energy for cellular processes is generated. C. Carbon dioxide is released. D. Oxygen is released.
Answer:
Energy cellular
Explanation:
energy cellular
Drag each tile to the correct location on the table. Not all tiles will be used.
SAMSUNG
Identify the relative abundance and descriptions of some of the gases in the atmosphere.
trace gas
required for
photosynthesis
second most
abundant gas in
the atmosphere
incorporated as a
major component of
proteins and DNA
does not
react with other
substances
required for aerobic
cellular respiration
most abundant gas
in the atmosphere
Relative
Gas
Description
© 2019 Edmentum. All rights reserved.
A trace gas, carbon dioxide is necessary for photosynthesis. Nitrogen is the most prevalent gas in the atmosphere and is a key component of proteins and DNA.
Why is photosynthesis so important?
It is important because photosynthetic is the process through which plants use sunlight to change oxygen into carbon dioxide. Animals need oxygen to survive, whereas plants clean the air by taking harmful carbon dioxide out of it.
Why does photosynthesis occur?
The Sun Light energy triggers a chemical reaction that disassembles the water and carbon dioxide molecules and reassembles them to form glucose and oxygen gas. After the sugar is created, the mitochondria convert it into energy.
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Look at the ocean system below.
plankton → shrimp → salmon → humans
What will most likely happen if the plankton population decreases in this
ocean system?
Answer:
All the other animals that depend on it will go down
Explanation:
Then all the animals will be fighting over food and then it will become survival of the fittest
Answer:
Shrimp will have more difficulty finding food.
Explanation:
just did it
The expression 40x2 – 65x + 50 represents the sum of the interior angles of a regular pentagon in degrees. If the interior angles of the pentagon are equal, which expression represents the measure of two angles?
2x2(20 – 32x + 25x2)
2(8x2 – 13x +10)
5x2(8x2 – 13x + 10)
5(3x2 – 8x + 5)
Answer:
The answer is: 5x2 (8x2 - 13x + 10).
Explanation:
The expression 40x2 - 65x + 50
The expression that represents the measure of two angles is this:
5x2 (8x2 - 13x + 10);
(5 x 8x2) - (5 x 13x) + (5 x 10);
40x2 - 65x + 50
The answer is: 5x2 (8x2 - 13x + 10).
The measure of two angles in the polygon is 5x^2 (8x^2 - 13x + 10).
What is a polygon?A polygon refers to any n sided figure. The number of sides in a polygon can range from 2 to infinity. We are told in this case that the figure is a pentagon hence it has five sides.
If we designate each side of the polygon as x and all angles are equal. The measure of two angles in the polygon is 5x^2 (8x^2 - 13x + 10).
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which type of seismic waves result from interference between s waves and p waves
Answer:
Rolling waves.
Explanation:
Rolling waves result from interference between s waves and p waves .
Answer: It's Rayleigh Waves
Explanation:
why does fossil formation require a large amount of time? would it have the same results over a shorter period?
ANSWER:
Fossils take a lot of time to form because the decay of organisms takes long time. Organisms decompose quickly when they are exposed to oxygen and so it is not easy to get their fossils.
EXPLANATION:
To get fossils, organisms must be buried deep so that they decay. When an organism gets eaten by microbes or decomposes, it cannot become a fossil. The process of decay is a long one as the hard parts of the body like bone and teeth take a long time to decay. Over a short period of time, we cannot get fossils because in short time period, only soft parts of the body decay which do not offer much explanation about the organism. All of the planets in Earth's solar system must follow the same plane of motion. What's this plane called?
A. Plane of the ecliptic
B. Plane of spherical motion
C. Plane of orbital rotation
D. Plane of triangulation
Answer A. Plane of the ecliptic
Answer:
C. Plane of orbital rotation
Explanation:
The orbital plane of an object orbiting around another is the geometric plane that contains the orbit in question.
By definition, the inclination of a planet in the solar system is the angle between the orbital plane of the solar system and the orbital plane of the Earth.
Answer:
A. Plane of the ecliptic
Explanation:
The plane of ecliptic refers to the plane in which all the planets and the Sun move across in the sky as observed from the Earth. Ecliptic is the path of the Sun's motion in the sky as observed from the Earth throughout the year. The planets must also follow the same plane of motion as they lie in the same plane as that of the Sun.
Which of the following is the best example of a pioneer species?
A. lichens growing on rocks after a volcanic eruption
B. grasses growing after a forest fire
c. oak trees replacing pine trees in a forest
D. small mammals moving into a grassland
All macromolecules are made mostly of the same six elements. What are
those six elements?
Answer:
Carbon, hydrogen, oxygen, nitrogen, phosphorous, and sulfur.
Explanation:
Macromolecules such as carbohydrates or lipids are made of a selection of these six elements. Carbohydrates are made out of carbon, hydrogen, and oxygen--or "CHO" for short. Lipids are made out of carbon, hydrogen, and oxygen as well. Proteins are made out of carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur (CHONs, the s is lowercase because sulfur does not usually appear in proteins). Nucleic acids are made out of carbon, hydrogen, oxygen, nitrogen, and phosphorous (CHONP).
Hope this helps!
Final answer:
Macromolecules, crucial for life, are composed mostly of six elements: carbon (C), hydrogen (H), oxygen (O), nitrogen (N), phosphorus (P), and sulfur (S). Carbon plays a central role as the backbone due to its ability to form four covalent bonds.
Explanation:
All macromolecules, which include proteins, nucleic acids (RNA and DNA), carbohydrates, and lipids, are composed mostly of the same six elements. These elements are carbon (C), hydrogen (H), oxygen (O), nitrogen (N), phosphorus (P), and sulfur (S). The carbon atom is a fundamental component for all macromolecules due to its unique properties, which enable it to form covalent bonds with up to four different atoms. This makes carbon the key structural component, or "backbone," of the macromolecules.
Within these macromolecules, nucleic acids contain C, H, O, N, and P, and are composed of monomers called nucleotides. Proteins are primarily composed of C, H, O, N, and smaller amounts of sulfur. Proteins are built from 20 naturally occurring amino acids, which link together through dehydration synthesis. The other macromolecules, carbohydrates, and lipids also contain these elements in various configurations.
\What is the primary function of Glucose?
A. It is the secondary form in which carbohydrates are transported around the body.
B. It is used in transport, since it is not very soluble.
C. It is the main energy source for cells.
D. As a sugar, its function is as a sweetener.
C. It is the main energy source for cells.
What's Glucose?Glucose is the main form of sugar within the blood and is an important source of energy for the body's cells. Glucose comes from the ingredients we consume or the body could make it from other materials. Glucose is carried to the cells through the bloodstream. Numerous hormones, which include insulin, manage glucose levels in the blood.
A primary function of the glucose molecule is to behave as a supply of power; Fuel. Flowers and animals use glucose as a soluble, easily distributed shape of chemical power which can be 'burnt' in the cytoplasm and mitochondria to release carbon dioxide, water, and strength.
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Why is reducing caloric intake insufficient for a person to loose weight in a healthy way?
Because there are several factors that determine weight loss or gain and reducing calorific intake is just one of them (for reducing weight loss). Other factors that should be considered is exercise. Doing regular exercise ensures that the metabolic rate of the body is increased so much of the calories are burned even after intake. Having a lower metabolic rate can result to increased weight gain even with low calorie intake.
The element is found in smaller quantities in the body but in a wider variety of places including ATP molecules, DNA, bones, and teeth. What is it
Answer:
Phosphate
Explanation:
Phosphorus is the element that makes up less than 1 percent weight of a human's body. However it is present in the ATP, DNA, teeth and bones in excessive quantity. In the DNA molecule, phosphorus is present in the form of units phosphate molecules joined with nitrogenous bases and sugar groups in a successive fashion. Moreover, there is energy currency of a cell called ATP that is important to perform normal day to day activities. it also contains phosphorus in the form of phosphate.Moreover, bones and teeth are made up of Calcium Phosphate molecules. Around 85% of the phosphorus found in phosphate is present in the bones. The remaining amount of it is phosphorus is present in the tissues of all body parts. In the body organs, kidneys help control the amount of phosphate in the blood.Hope it helps!
Answer:
Phosphorus
Explanation:
Phosphorus is the element that is present in smaller quantity in the body, but large quantity of it is present in bones, teeth, DNA and ATP.
In DNA it is present as phosphate backbone, ATP molecules use phosphate group to generate energy, teeth and bones both need phosphorus in addition to calcium and magnesium for strength.
Drag the tiles to the correct boxes to complete the pairs.
Match the genes with their linkage ability.
genes close to each other
genes on different chromosomes
genes apart from each other,
but on the same chromosome
unlinked genes
not so strongly linked genes
strongly linked genes
Reset
Next
Answer:
The genes, which are situated in close proximity on a chromosome exhibits a greater linkage tendency. This signifies that it is very much possible that these genes are going to be transmitted together to the next generation. In contrast, the genes, which are found on different chromosomes exhibit a slight chance to be passed on together. Thus, the unlinked genes are the genes present on different chromosomes, the not so strong linked genes are the genes that are far from each other, but on the similar chromosome, and the strongly linked genes are the genes close to each other.
Answer:
1. Strongly linked
2. Unlinked
3. Linked, but not strongly
Explanation:
The genes closest to each other are strongly linked genes. The genes that are farther away from each other but on the same chromosome are linked, but not strongly. The genes on different chromosomes are unlinked.
lipids are made mainly of
Answer:
Fats, oils, waxes, and sterols.
Explanation:
Lipids are made mainly of fats, oils, waxes, and sterols.
They also have 3 fatty molecules.
The diagram shows a section of DNA. What is the arrow labeled X pointing to? adenine thymine cytosine guanine
Answer:
B
Explanation:
Answer:
The answer is B! Thymine!
On the cumulative exam edge 2023
Explanation:
As molecules are formed from metabolism, entropy __ and the universe becomes less disordered.
A. is decreased
B. is increased
C. moves closer to equilibrium
D. is unchanged
Answer:
B. is increased
Explanation:
As molecules are formed from metabolism, entropy is increased and the universe becomes less disordered.
The entropy or disorder of a system increases as metabolism occurs and molecules are formed in line with the Second Law of Thermodynamics. Therefore the correct answer is option B. Entropy is increased.
Explanation:The correct answer is B. Entropy is increased. Entropy is a measure of irregularity, randomness, or unpredictability in a system and is a key principle in thermodynamics. As metabolism occurs and molecules are formed the entropy or disorder, of the system increase meaning the universe becomes more disordered. This is in accordance with the Second Law of Thermodynamics which contends that in an isolated system entropy never decreases rather it either remains constant or increases.
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3. Describe three different ways to classify planets in our solar system.
Which of the following best explains what would happen if there were no autotrophs in an ecosystem? (1 point) They are the first trophic level in an ecosystem and without them the rest of the organisms in the ecosystem would have no source of energy. They are the top trophic level in an ecosystem and without them the herbivores would have to adapt to consuming other heterotrophs for energy. They are the first trophic level in an ecosystem and without them heterotrophs would overpopulate. They are the top trophic level in an ecosystem and without them the ecosystem would collapse.
Answer:
They are the first trophic level in an ecosystem and without them the rest of the organisms in the ecosystem would have no source of energy
Explanation:
The autotrophs are the producers in the ecosystem. They manage to produce food for themselves, and they represent the first trophic level, thus they are the basis of any ecosystem. These organisms are the once that produce the energy, and the organisms in the trophic levels above them use their energy to survive. If the autotrophs are removed from and ecosystem, the ecosystem will collapse, as there will be no source of energy for the organisms in the trophic levels above, thus all of them will die out quickly.
Answer:
They are the first trophic level in an ecosystem and without them the rest of the organisms in the ecosystem would have no source of energy
Explanation:
RNAi is a technique that silences genes by targeting them and degrading their mRNA. How can this technique be used in scientific laboratories?
A. RNAi has been used in laboratories to make bacteria more susceptible to antibiotics, but has limited application in eukaryotic cells.
B. RNAi is a powerful tool for degrading mRNA, but because it doesn't degrade other types of RNA, its use is limited.
C. RNAi is observed in nature, but it can't be used in laboratories.
D. RNAi allows scientists to turn off one gene specifically to study its effect.
Answer:
(D). RNAi allows scientists to turn off one gene specifically to study its effect.
Explanation:
RNAi (RNA interference) can be defined as a process, which involves inhibition of gene expression by degrading the targeted mRNA molecules. This technique is widely used in laboratories to study the functions of different genes by targeting them.
For this, a dsRNA molecule is formed having a sequence complementary to target gene and introduced into the cell or organism. This RNA is recognized as exogenous RNA and triggers activation of RNAi pathway.
RNAi pathway leads to a significant decrease in expression of a target gene. Hence, physiological role of the targeted gene product can be check by studying the effect of decrease in its expression.
Thus, the correct answer is option (D).
Answer:
The Answer is option D
Explanation: