As a result of the Law of Conservation of Energy, a fish cannot gain more energy than it consumes. Which method, using an isolated system of fish in an aquarium, would best test this hypothesis?
a) Measure the total energy in the fish, the aquarium, and the energy of the food fed to the fish. Then measure the energy in the fish and the aquarium after feeding and determine the difference.
b) Measure the total energy in the fish before feeding and the energy of the food fed to the fish. Then measure the energy in the fish after feeding and determine the difference.
c) Measure the total energy of the aquarium before feeding and the energy of the food fed to the fish. Then measure the energy in the aquarium after feeding and determine the difference.
d) Measure the total energy of the food before feeding and the energy of the fish after feeding. Then measure the energy in the aquarium after feeding and determine the difference.
Correct answer: C) . Measure the total energy of the aquarium before feeding and the energy of the food fed to the fish. Then measure the energy in the aquarium after feeding and determine the difference.
An isolated system is a system in which neither the energy nor the matter can enter or leave the system. As a result of that, the total mass of the system remains unchanged.
There is a change in the species present, But, the total mass present will not change based on the law of conservation of matter and energy.
The equation below represents a summary of a biological process
carbon dioxide+water--->glucose+water+oxygen
This process is completed in
1.) Mitochondria
2.) Ribosomes
3.)Cell Membranes
4.) Chloroplasts
The equation represents photosynthesis, a process in which chloroplasts of plant and algal cells convert carbon dioxide and water into glucose and oxygen using sunlight energy.
The equation, carbon dioxide + water ---> glucose + water + oxygen, represents the process of photosynthesis. This biological process occurs in the chloroplasts of plant and algal cells. During photosynthesis, chloroplasts use the energy from sunlight to convert carbon dioxide and water into glucose and oxygen. Glucose serves as a vital source of energy and a building block for plant biomass, while oxygen is released as a by-product, playing an essential role in maintaining life on Earth by supporting aerobic respiration in animals.
DNA is aspiral ladder shaped structure with the sides of the ladder representing which components
The sides of the DNA ladder are represented by the sugar-phosphate backbone.
The structure of DNA, as discovered by James Watson and Francis Crick, is often described as a double helix, which can be visualized as a twisted ladder or spiral staircase.
The sides of this ladder are composed of alternating sugar and phosphate groups, which form the backbone of the DNA molecule. Each sugar (deoxyribose) is linked to a phosphate group, and these sugar-phosphate chains run in opposite directions on the two strands of the DNA double helix.
The rungs of the ladder are formed by pairs of nitrogenous bases that bridge the two sugar-phosphate backbones.
These bases are adenine (A), thymine (T), cytosine (C), and guanine (G). Adenine always pairs with thymine, and cytosine always pairs with guanine, through hydrogen bonds. These specific base pairs are crucial for the replication and expression of genetic information.
In summary, the sides of the DNA ladder, which give the molecule its structural integrity, are made up of the sugar-phosphate backbone, while the rungs are composed of the nitrogenous base pairs.
Grazing cows disturb the grass and cause insects to fly around the cows as they eat. In turn, birds swoop in and eat the insects. This type of feeding relationship is an example of A) commensalism. B) mutualism. C) parasitism. D) predation.
A) Chromosome B) DNA nucleotide C) Codon D) Gene Place the components in order, from smallest to largest. A) A-B-D-C B) B-C-D-A C) C-D-B-A D) D-C-B-A
Answer: The correct answer is- B) B-C-D-A that is DNA nucleotide- Codon- Gene- Chromosome.
DNA ( deoxyribonucleic acid) is considered as the genetic material of living organisms. It is made up of small units called nucleotide ( which contains deoxyribose sugar, phosphate, and nitrogenous base).
A sequence of three nucleotide is called codon ( which codes for a particular amino acid).
Different codons are present in a gene, which is a segment of DNA coding for a particular protein.
Finally, genes are present on chromosome ( thread like structure composed of DNA).
Thus, option B) correctly depicts the given components in order, from smallest to largest.
Jane waters her plants every morning. Which path does the water take to be a part of photosynthesis?
roots to leaves
leaves to roots
stems to roots
Which statements are true?
Hurricanes can be caused by physical processes in the hydrosphere.
Most of the earth's freshwater can be found in the air and streams.
Most plants and animals need freshwater to survive.
Ocean currents move warm water from the equator toward the poles.
The water cycle is powered by the sun.
Answer:
The correct answer is - 1), 3), 4) and 5) are correct statements.
Explanation:
Hurricanes are the tropical storm caused in tropical or sub tropical water bodies. Hurricanes are tropic cyclone caused where warm air rises from ocean water and replaced by the cooler are and then again with warm air and cooler in rapid manner.
Most plants and animals need fresh water for their survival because body comprises water to perform several reaction and prevent from dehydration.
Ocean currents move warm water to the poles from the equator due to regulation of the global water temperature. Thus is maintained by the m,mechanism of the convection current that carries the warm water from the equator to the poles and at the poles, these warm warm because of the lowering temperature, cools an sinks.
The water cycle is the process in which water circulates within the spheres and begins with evaporation by sun.
Thus, the correct answer is - 1), 3), 4) and 5) are correct statements.
When evaluating the difference between baked potatoes and French fries, the two areas most different are: Calories and cholesterol Calories and sodium Protein and carbohydrates Protein and sodium
All of the following lists include sources of point-source pollution EXCEPT :
A) oil spills , irrigation , fertilizers , pesticides
B) pesticides , oil spills , irrigation , leaky underground storage tanks
C) drainage from industrial plants , oil spills , runoff from street gutters , chemical spills
D) pesticides , herbicides , animal waste , irrigation
Point source pollution defines a source from which pollutant is discharged, hence option d is correct.
What is point-source pollution?Factories, industrial facilities, oil refineries, pulp, and paper mills, chemical manufacturers, automobile manufacturers, and food processors.
Point source pollution is described as any single identified source of pollution from which pollutants are released, shipped, or manufactured chimneys by Sewage Treatment Plants.
Point sources include, among other things, factories and sewage treatment facilities. Pollutants include heavy metals, noxious chemicals, thermal pollution, petroleum, and medicines.
Therefore any single identified source of pollution is a point source except option d.
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The study of biology is important because it focuses on what?
Answer:
Explanation:all livings things
What is the main purpose of the organ system shown above?
A)
receives stimuli, integrates information, and directs the body
B)
transports nutrients, gases, hormones, and wastes through the body
C)
provides support for the body and protects delicate internal organs
D)
provides mobility and controls the movement of materials through some organs
Answer:
The most appropriate answer would be C) provides support for the body and protects delicate internal organs.
The skeletal system consists of bone, ligaments, cartilages and other tissues.
The main functions of a skeletal system in a human being are:
Support: It provides the framework and support to the body which helps in maintaining the shape of the body. For example, lungs would have collapsed in absence of rib cage and associated muscles. Movement: It helps in movement and locomotion of the body. Protection: It protects the internal organs of the body. For example, the skull protects the brain, vertebrate protects the spinal cord et cetera. Blood cell production: Haematopoiesis mainly occurs in the bone marrow. Storage: It can store minerals like iron and calcium. Endocrine regulation: Osteocalcin released from bone cells contributes to the blood sugar (glucose) regulation and fat deposition.Many of the biochemical reactions that occur within your cells are catalyzed by enzymes. Which of the following statements is true about most enzyme-assisted reactions? A) They can take place only within a ribosome. B) They occur more quickly than reactions without enzymes. C) Enzymes are quickly used up during the reactions. D) They can take place at any temperature or pH.
Enzyme-assisted reactions occur more quickly than those without enzymes because they lower the activation energy needed for the reactions, are not consumed in the process, and are reused multiple times. Therefore the correct answer is option b.
Explanation:Many of the biochemical reactions that occur within your cells are catalyzed by enzymes. The true statement about most enzyme-assisted reactions is that B) They occur more quickly than reactions without enzymes. Enzymes function as biological catalysts, significantly lowering the amount of activation energy needed, which in turn speeds up reactions. Contrary to taking place exclusively within ribosomes or being quickly used up during reactions, enzymes are not consumed and can act upon substrates multiple times. However, enzymatic reactions are very sensitive to their environment and do not take place effectively at any temperature or pH, as they have optimal conditions in which they function best.
A student takes notes in class as shown below.
A.
Uses an objective process
Is updated constantly
B.
Is not objective
Does not use a process
Resists new information
Which are the best titles for A and B?
A: “Science”; B: “Pseudoscience”
A: “Pseudoscience”; B: “Science”
A: “Characteristics of Science”; B: “Limitations of Science”
A: “Limitations of Science”; B: “Characteristics of Science”
A: “Science”; B: “Pseudoscience”
Explanation;Science is a body of knowledge and the process of acquiring new knowledge, using scientific processes. Science uses objective processes and is updated constantly, when new ideas or information is discovered. Pseudoscience on the other hand, does not follow scientific processes. It is a practice or a belief that claims to be science, but does not follow specific criteria, that is ,an objective processes.Science is defined by criteria, which include, experimentation, replication of results, and peer review. Therefore, pseudoscience are beliefs and claims that do not meet such criteria.Meiosis is used to make sperm and eggs. Why did the splitting process have to happen twice?
A cell is placed in a solution containing a higher solute concentration than the interior of the cell. What effect would this have on the cell?
a. The cell would divide.
b. The cell would rupture.
c. The cell would shrivel.
d. The cell would swell.
A cell in a hypertonic solution, which has a higher solute concentration outside than inside, will lose water and shrivel as a result of osmosis.
Explanation:When a cell is placed in a solution that has a higher solute concentration than the interior of the cell, it is in a hypertonic solution. In this scenario, the cell will lose water to the surrounding environment because water moves from areas of lower solute concentration to areas of higher solute concentration, a process known as osmosis. Consequently, the cell will shrivel as it loses water.
Thus, the correct answer to what effect a hypertonic solution would have on a cell is:
c. The cell would shrivel.This is because the hypertonic solution has a higher concentration of solutes compared to the cell’s interior, causing water to exit the cell to try to balance the solute concentrations, resulting in the cell shrinking or crenating.
Which scientist conducted the first psychological experiment?
Deer need food and water to survive. What are food and water for the deer population?
A. Carrying capacity
B. Limiting factor
C. Population growth
D. Scarce resources
Answer:
B. Limiting factor
Explanation:
"The diagram shows the inside of a eukaryotic cell.
Which process occurs in the structures that are labeled X?
lactic acid fermentation
alcohol fermentation
glycolysis
Krebs cycle"
The snapping turtle shown above, lives in a small farm pond, where its major prey is largemouth bass. In turn, the bass primarily eat emerald minnows. This snapping turtle weighs 40 pounds. If the pond has 10 mature snapping turtles of this size, how many pounds of minnows are required to support them? [Use the 10% law across each trophic level.]
A) 400
B) 4,000
C) 40,000
D) 400,000
___________ is the attraction of water molecules to one another, while _________ is the attraction of water molecules to other polar substances.a: adhesion; cohesionb: cohesion; adhesionc: crossed outd: surface tension; adhesion
Correct answer: B). Cohesion; adhesion
Cohesion is defined as the force of attraction between the same substances while that of adhesion is defined as the force of attraction between the different type of substances.
Cohesion is the force that is known to hold the hydrogen bond together in order to create surface tension of water molecules. While that of adhesive force is responsible for pulling the water molecules towards the other molecules.
Hence, the correct answer would be ''Cohesion; adhesion''
IN YOUROWN WORDS explain what is hypnosis?
Hypnosis is a trance-like state of heightened suggestibility, deep relaxation, and intense focus, often induced by hypnotic induction. It is used therapeutically to address unconscious desires and change unwanted behaviors.
Hypnosis is a trance-like state of consciousness that is typically induced by a procedure known as hypnotic induction.
It is often used therapeutically to bring unconscious desires and emotions to the conscious mind, making them easier to address. For example, hypnosis is frequently applied to help individuals modify unwanted behaviors, such as reducing smoking, improving eating habits, or managing alcohol abuse. Famous psychologist Sigmund Freud highlighted its use in psychological therapy.Additionally, brain imaging studies have shown that hypnotic states are associated with global changes in brain functioning, underscoring its potential efficacy in therapeutic settings.
The orbital radius of Venus is 0.72 AU what is the distance in kilometers?
The crops grown in a small Midwestern farming community are being destroyed by grasshoppers. The farmers have banded together and have decided to spray pesticides to reduce the grasshopper population. What is likely to happen in the future as a result of this spraying?
Why does hypnosis affect the brain?
Usually, a hypnotized person forgets to blink, giving the impression of being out of breath. However, the subject is in a hyperactive mental state, activating areas of the brain that normally do not show as much activity. One less.
When an individual is hypnotized, there is a region of the brain that has its activity reduced, precisely the one related to the spatial perception and that we have of ourselves, in addition to our episodic memory. This causes the hypnotized person to concentrate intensely on something created by their own imagination - or that has been suggested - but not as part of what is being imagined. Hypnotized people lose the ability to remember what they would normally do in certain situations, while the ability to think about a variety of imaginary options increases.
This explains why people in a hypnotic state end up behaving completely differently from normal, remaining calm in situations in which they would feel terrified, for example.
If purple flower color is dominant and red flower color recessive, how many phenotypes are possible in offspring of homozygous purple crossed with homozygous red?
1 2 3 4 I put 1.
Answer: The correct answer is 1 phenotype.
Dominant trait ( depicted by capital letter) masks the expression of recessive trait ( depicted by small letter).
As per the question, purple flower color is dominant and red flower color is recessive. Let 'P' allele corresponds to purple color and 'p' corresponds to red color.
The possible genotypes for purple flower is 'Pp' and 'pp' whereas for red flower is 'pp'.
Genotypes of parent plants, which are homozygous for purple and homozygous for red are PP and pp respectively.
When these plants are crossed, they result into heterozygous purple (Pp) offspring that is phenotype of all offsprings in first generation is Purple
Refer punnett square.
Which soil is the stickiest?
A.
clay
B.
loam
C.
silt
D.
sand
What connects the axon of one neuron with the dendrite of another neuron to replay messages?
Changes in the trilobite exoskeleton can be attributed to ____.
a.
changing environments
c.
inter-species mating
b.
competition for survival
d.
both a and b
It Would be D. Both a and b
Winds move in a _____ direction in the Northern Hemisphere and in a _____ direction in the Southern Hemisphere because of the Coriolis effect.
counterclockwise, clockwise
clockwise, counterclockwise
polar, equatorial
equatorial, polar
Answer:
The correct option is counterclockwise, clockwise
Explanation:
Hello ! Let's solve this!
The coriolis effect causes that an object that moves in a system that moves, produces an additional acceleration.
The coriolis effect is a force that makes the wind in the northern hemisphere counterclockwise.
In the southern hemisphere, the wind will be hourly.
The correct option is counterclockwise, clockwise
What must happen before a chemical reaction can begin?
Answer:
The correct answer is that the activation energy must be reached.
Explanation:
In order to start a chemical reaction, energy is needed. A certain amount of energy is needed in order to get started. This energy is termed as activation energy. A reaction would not take place unless the molecules or atoms of reactants come together. This takes place only when the particles are in motion, and for motion, energy is required.
The reactants have to overcome forces, which push them away from each other, and the bonds present in the reactants are needed to get dissociated, for both these purpose energy is required. Thus, before the beginning of a chemical reaction, the activation energy must be reached.