A independent variable "is the variable in a experiment that you are testing." They're two variables in experiments you will have to watch out for a dependent variable and a independent variable. A dependent variable is a variable in a experiment that you are measuring for example height of a plant and a independent variable is a variable that you are testing in a experiment for example which plant will grow the tallest.
Hope this helps.
- What organisms in the lake require oxygen to survive?
Answer:
All
Explanation:
All organisms require some sort of oxygen to survive. Fish have gills that pull the oxygen from the water.
During which phase of cell cycle do chromatids form
In the S phase (synthesis phase), DNA replication results in the formation of two identical copies of each chromosome sister chromatids that are firmly attached at the centromere region.
During which stage of mitosis do chromatids?Metaphase leads to anaphase, during which each chromosome's sister chromatids separate and move to opposite poles of the cell.
What is the S phase of the cell cycle?
Cell cycle has different stages called G1, S, G2, and M. G1 is the stage where the cell is preparing to divide. To do this, it then moves into the S phase where the cell copies all the DNA.
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Final answer:
Chromatids form during the S phase of the cell cycle, when DNA replication results in two identical sister chromatids joined at the centromere.
Explanation:
Chromatids are formed during the S phase (Synthesis phase) of the cell cycle when DNA replication takes place. In the S phase, each chromosome duplicates and creates two identical DNA molecules known as sister chromatids, which are connected at a central region called the centromere. This prepares the cell for division, whether it be mitosis or meiosis.
Subsequent stages of the cell cycle involve the movement and separation of these chromatids. During prophase and metaphase, the chromosomes condense and align for division. In anaphase, the sister chromatids are pulled apart to opposite poles of the cell, and during telophase, they arrive at opposite ends, followed by the division of the cell into two daughter cells in cytokinesis.
What do we need nitrogen and phosphorus for
Answer:
We need nitrogen and phosphorus for the growing of algae and aquatic plants that help give food and a place for fish and other smaller organisms under water. It helps make an DNA cell membrane, and also helps bone and teeth formation in humans. It also helps the food production this is because it is part of nitrogen potassium and phosphorus. There are used in fertilizer.
Explanation:
Nitrogen and phosphorus are essential for life. Nitrogen is critical for protein synthesis and the construction of nucleic acids, while phosphorus is crucial for the formation of bones, teeth, DNA, RNA, and ATP.
Explanation:Nitrogen and phosphorus are essential elements needed for life. Nitrogen is a key component of amino acids, the building blocks of proteins, as well as nucleic acids like DNA and RNA. Therefore, it is necessary for the growth and repair of all living cells. Phosphorus, on the other hand, is primarily used in the body to form bones and teeth. It is also essential in the synthesis of DNA and RNA and the production of ATP, a molecule that serves as the main energy currency of the cell.
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Carrying the genetic code and determining an organism's structure and function are the functions of
DNA
ORNA
The DNA acts as carrier of genetic information and is also involved determining the structure and function of organism.
Explanation:The fundamental job of DNA is that it acts as carrier of genetic information and is also involved determining the structure and function of organism. It is the major components due to which the cell secrets proteins which are required for all metabolic action of the cell.
The DNA sections that convey hereditary data are called genes; however, other DNA arrangements have auxiliary purposes, or are associated with controlling the statement of hereditary data.
which of these is not a way that carbon cycles through the biosphere A) photosynthesis B) transpiration C) combustion of fossil fuels D) decomposition
Answer:
B
Explanation:
Transpiration is a way that carbon cycles through the biosphere.
Transpiration is a process that involves loss of water through the stomata of plants.It enhances nutrient uptake from soil into plants.What is carbon cycles?The carbon cycle is the process in which carbon atoms continuously travel from the atmosphere to the Earth and then back into the atmosphere.
There are six main processes in the carbon cycle:
Photosynthesis.Respiration.Exchange.Sedimentation.Extraction.Combustion.Hence, B option is correct.
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Complete the following sentence: "When ionic compounds dissociate in water, each ion is surrounded by a sphere of hydration: __________ are surrounded by the partially negative charge of the water molecule's __________; __________ are surrounded by the partially positive charge of the water molecule's __________.
Answer:
Cations, Oxygen, Anions, Hydrogen
Explanation:
Water molecule is polar (meaning it has dipoles). The oxygen having a higher atomic mass attracts most of the electron cloud of the molecule becoming partially negatively charged and leaving the hydrogen end to be partially positive.
An Ionic compound is one between two atoms where one donates its electrons to the other for both to achieve stable configuration. The two atoms, therefore, become charged and are bought together by electrostatic forces.
When an ionic compound is put in water, it dissociates into its ions (anions and cations) They attract and repel with the polar water molecules depending on their charges. The anions (negatively charged ion) are surrounded by water molecules with the hydrogen ends and the cations are surrounded by water molecules with the oxygen ends.
Answer:
Positive sodium ion, oxygen atom, negative chloride ion, hydrogen are the answers
Explanation:
Water can dissolve many solutes. Water molecules are polar; however, it acts differently with charged polar substances. This interaction of water with charged substances forms hydration shell surrounding the solute. So, when the ionic compound NaCl dissociate in water, the hydration shell formation occurs around the ions.
The positively charged Na become surrounded by partially negative charge of the oxygen atom of water molecule and the negatively charged Cl become surrounded by partially positive charge of hydrogen atoms of water.
a gravitational force can be described as?
A. The amount of mass contained in an object
b. The attraction between objects with mass
c. A pull felt by matter that is under high-pressure
D. The push needed to pack matter into a volume
Answer:
the attraction between objects with mass
Explanation:
as between the sun and the earth.
What is the answer ? Is mine right?
Answer:
C. Obtain consistent data
Explanation:
When conducting an investigation, it doesn't matter whether the hypothesis was correct or not since you are trying to find that out. All you are trying to do is get data that may or may not be able to support that hypothesis that you made.
alligators are some of the largest predators found in lakes and swamps in northern florida which of the following helps alligators survive and compete for food in aquatic environments
They can swim with only their eyes and noses showing
they use sunlight to maintain the body temp
they absorb water they need through there skin
they can become herbivores when food is scarce
Answer:
The correct option is A.
Explanation:
Alligators generally feed on variety of foods, such as small amphibians, birds, fish etc. To catch these preys, alligators usually disguise by immersing all their bodies inside water with only their eyes and noses showing. They will stay perfectly still in that position until a prey come along, then they will quickly attack the prey.
Alligators are quick and efficient predators. This technique that the alligators used to catch their preys enhances their survival and competition for food.
In addition, alligators depends on their external environments to regulate their body temperature. They can use sun as well as migration to warmer water to regulate their body temperature.
A scientist measures 1062 mL of a substance with a density of 0.023 g/mL. What is the
mass of the substance?
Answer:
Mass of the substance is 24.426 g.
Explanation:
Given that the density is [tex]0.023g/mL[/tex]
The volume of substance is [tex]1062 mL[/tex].
density of a substance is the mass of the substance per unit volume.
density= [tex]\frac {mass}{volume}[/tex]
In this question the mass of the substance is [tex]0.023g/mL[/tex]
Therefore the mass of the substance in [tex]1062 mL[/tex] of the substance is given by
mass = [tex]volume \times density[/tex]
mass = [tex]1062 \times 0.023=24.426 g[/tex]
Final answer:
Using the formula mass = density × volume, the mass of the substance with a given density of 0.023 g/mL and volume of 1062 mL is calculated to be 24.426 grams.
Explanation:
The student has asked to calculate the mass of a substance given its volume and density. The formula to find mass is mass = density × volume. Given that the density is 0.023 g/mL and the volume is 1062 mL, we can find the mass by multiplying these two values:
Mass = Density × Volume = 0.023 g/mL × 1062 mL = 24.426 g
Therefore, the mass of the substance is 24.426 grams.
what is it called when a scientists personal opinion affects the way experimental results are reported A. bias B. curiousity C. inductive reasoning D. deductive reasoning
Answer:
your answer should be A. bias
The answer is option A "bias." A scientist bias is a opinion on something or someone so in this case a scientist bias on a experiment can effect the experimental results because of what the scientist think is correct so the answer would be option A. It's not option B because curiosity would most likely cause you to test your hypothesis with a experiment. It's not option C because inductive reasoning is supplying evidence for the truth of the conclusion. It's also not option B because deductive reasoning is the opposite of inductive reasoning.
Hope this helps.
Describe two inheritance patterns besides simple dominance
Explanation: All of it is in gamete formation. Meaning, it is going through a gamete formation which also means that pairs of alleles that are for different traits, segregate. They move on independently from one another, never touching.
For your question, It's incomplete dominance which is when cases with one allele isn't complete to be dominant over another allele. It's all got to come together in order for it to become a strong and dominant allele, or else it won't be complete and won't become and do what it has to.
I hope this help you and I hope that I gave you what you wanted/needed for this question.
Final answer:
Two inheritance patterns that differ from simple dominance are incomplete dominance, where neither allele is completely dominant resulting in a blended phenotype, and codominance, where both alleles are fully expressed in the phenotype.
Explanation:
Complex Inheritance Patterns
Not all traits follow the simple dominance inheritance pattern discovered by Mendel. Beyond simple dominance, two other inheritance patterns are incomplete dominance and codominance.
Incomplete Dominance
In incomplete dominance, the phenotype of the heterozygotes is somewhere between the phenotypes of the two homozygous parents. This means that neither allele is fully dominant. A classic example of this is the snapdragon flower, where the cross between a red flower (RR) and a white flower (rr) results in offspring with pink flowers (Rr), a blend of red and white.
Codominance
In codominance, both alleles in the genotype are fully expressed, leading to offspring with a phenotype that is neither dominant nor recessive, but a combination of both. An example of codominance is seen in human blood types, where the A and B alleles are codominant and can result in a blood type of AB.
what do you know about an organisms parents if it is heterozygous for a certain trait ?
a. both parents supplied the same allele
b. the parents had different traits
c. the parents supplied different alleles
d. the parents have the same traits
Answer:
b. they present different traits
Explanation:
they are diffrent because heterozygous isnt allways the same.
Analyze the diagram below. Which of the following is true about the sodium (Na) atom after the electron moves to chlorine?
A It has a negative charge.
B It becomes a positive ion.
C It becomes an isotope.
D It forms a covalent bond.
Answer:
B. It becomes a positive ion.
Explanation:
The number of electrons and protons is eleven in sodium. After sodium (Na) has transferred its electron to the chlorine atom (Cl) it becomes a positively charged ion. This is because as electrons are negatively charged, losing of an electron will increase the number of protons (i.e 11) as compared to the number of electrons (i.e 10) in sodium (Na) atom. Hence, a positive charge will be acquired by the sodium (Na) ions.
Answer:b
Explanation:It becomes a positive ion.
I answered this question and this is what I got.
If a bicyclist travels 30 kilometers in two hours, her average speed is a 15 km/h. b 2 km/h. c 30 km/h. d 60 km/h.
Answer:
15 km/h
Explanation:
The average speed of the bicyclist is calculated by dividing the total distance (30 kilometers) by the time taken (2 hours) which equates to 15 kilometers per hour. Therefore, the correct answer is (a) 15 km/h.
Explanation:The subject of this question is Mathematics. Specifically, it's about speed calculation which is often seen in middle school math and physics curricula. The question is asking for the average speed of a bicyclist who travels 30 kilometers in two hours.
Average speed is calculated by dividing the total distance traveled by the total time it takes. In this case, the total distance is 30 kilometers and the time is 2 hours.
To find the average speed, we use the formula:
Average Speed = Total distance / Total time
Substituting the given values into the formula gives:
Average Speed = 30 km / 2 hours = 15 km/h
So, the correct answer is (a) 15 km/h. This is the average speed of the bicyclist over the two-hour period.
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Which process is part of the carbon cycle?
A. Ammonification
B. Transpiration
C. Photosynthesis
D. Evaporation
Answer:
C. Photosynthesis
Explanation:
which of the following is indicated by the arrow in the image
Organisms and populations compete for abiotic and biotic resources. How does competition affect these resources?
A. Competition can limit or deplete resources
B. Competition can increase biotic resources
C. Competition can provide abiotic resources for other organisms
D. Competition only affects biotic resources
Answer:
A. Competition can limit or deplete resources
Final answer:
Competition for abiotic and biotic resources can limit or deplete these resources, affecting their availability in an ecosystem. This can result in harm to competing organisms, influence community dynamics, and alter species distribution.
Explanation:
When organisms and populations compete for abiotic and biotic resources, the impact can be quite significant. Competition can limit or deplete resources, which affects the availability of these resources to both the competing organisms and others in the ecosystem. For instance, plants competing for sunlight, water, and nutrients can reduce the availability of these resources for other species. This competition can harm one or both of the competing organisms, particularly if they are of the same species (intraspecific competition) or of different species (interspecific competition).
An invasive species like kudzu, by competing for light, can outcompete and thus limit the growth of trees. This is an example of how competition can lead to ecological imbalances. In the broader picture, competition impacts not just the individuals directly involved but can also affect community dynamics and the distribution of various species in a habitat.
Considering the options provided, the correct answer is A. Competition can limit or deplete resources.
40 POINTS PLZ HELP
1. In an ecosystem, there are many interactions among organisms and their ___ environment. (9 letters, 3rd is n)
2. Energy enters the ecosystem as light and exits as ____(4 letters)
3. Plants absorb mineral nutrients ___(4 letters)
4. Decomposers ___ chemical nutrients(7 letters, last is e)
5. Solar energy is converted into chemical energy by ____ organisms(14 letters)
6. ___ are consumers: they eat plants and each other(7 letters)
Answer:
1) nonliving
2) heat
3) ions
4) recycle
5) photosynthesis
6) Animals
In cats having hair dominant (H) over not having hair (h). If a male cat that is hetrozygous for hair is crossed with hairless cat.
What are the parents genotypes?
Answer/Explanation :
A heterozygous cat has a genotype Hh
A hairless cat has a genotype hh
When crossed, the results could be any of the following:
Hh (with hair)
hh (hairless)
There is a 50:50 chance or 1: 1 ratio that the offspring will have hair.
Final answer:
In a genetic cross involving cats where hair is dominant over hairlessness, a heterozygous male cat (Hh) mated with a hairless female cat (hh) results in offspring that are predicted to have a 1:1 ratio of haired (Hh) to hairless (hh) genotypes.
Explanation:
The question regards a genetic cross concerning hairlessness in cats, a trait determined by a single gene with two alleles: hair (H) is dominant over no hair (h). When a heterozygous male cat (Hh) is mated with a hairless (hh) female cat, we are examining a simple Mendelian cross to determine the offspring's potential genotypes.
The parents' genotypes in this scenario are as follows:
Male cat: Heterozygous for hair (Hh).Female cat: Homozygous recessive for no hair (hh).This cross results in a Predicted offspring phenotype ratio of 1:1, where 50% of the offspring are expected to be heterozygous with hair (Hh) and 50% are expected to be hairless (hh).
You can fill a glass of water to just slightly above the rim without it spilling over the
glass. What property of water best explains this phenomenon?
Answer:
Surface tension due to cohesion
Explanation:
Water molecules are polar meaning they have dipoles. The hydrogen end is partially positive while the oxygen end is partially negative. This is because oxygen with high atomic mass attracting most of the molecule's electron cloud to its end.
Due to this phenomenon water molecules act like little magnets that attract each other. The attraction of the molecules forms hydrogen bonds with each other. This is called cohesion (attraction of similar molecules). Due to this, water is able to create a surface tension that acts like a ‘skin’ and can support some weight (including its own weight) without collapsing.
Final answer:
The ability to fill a glass with water slightly above the rim without spilling is explained by water's cohesive property and surface tension, resulting from hydrogen bonding between water molecules.
Explanation:
The property of water that allows you to fill a glass to just slightly above the rim without it spilling over is known as cohesion. Cohesion is the result of water molecules being attracted to each other due to hydrogen bonding, which creates a strong intermolecular force. This attraction keeps the water molecules together at the liquid-gas (water-air) interface, forming a dome-like shape above the glass. This cohesive force gives rise to surface tension, which allows the water to hold together and not spill over immediately even when filled above the glass's rim.
Examples of cohesion and surface tension in action include floating a small scrap of paper or a steel needle on water. These objects can float because the surface tension at the water's surface can support their weight without the water breaking apart. Surface tension is the capacity of a liquid to withstand rupture when placed under tension or stress.
what is happening in the second step of this lock and key model of an enzyme?
Please Help!
Answer:
D
Explanation:
hope this helps
ASAP PLEASE ASAP!! Somebody please help!! You don't have to do all of them but if you can please do!!
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How are each of the properties important to life?
------------------------------------------------------------------------------
-Polarity
-Cohesive behavior
-Adhesion
-High specific heat
-Expansion upon freezing
-Versatility as a solvent
Answer:
Polarity- keeps it kind of cold
Cohesive Behavior- makes us funny
Adhesion- makes things stick
High Specific Heat- keeps it warm
Expansion upon freezing- makes it warm when it is freezing
Versatility as a solvent- makes things dissolve
Which equation describes what happens in photosynthesis?
6CO2 + 6H2O + energy → C6H12O6 + 6O2
C6H12O6 + H20 → CO2 + energy
C6H12O6 + 6O2 → 6CO2 + 6H2O + energy
CO2 + O2 + H20 + energy → CH2O5
Answer:
6CO2 + 6H2O + energy → C6H12O6 + 6O2
6carbon dioxide molecules + 6 water molecules + sunlight (generally) = glucose + 6 oxygen molecules .
Answer: 6CO2 + 6H2O + energy → C6H12O6 + 6O2
Explanation: Carbondioxide + water + Light = Glucose + oxygen
If a plant cell completes the cell cycle in 24 hour, how many cells will be produced in a week?
Final answer:
The number of cells produced in a week can be calculated using the formula 2^n, where n is the number of generations. Since a plant cell completes the cell cycle in 24 hours, the number of cells produced in a week would be 128 cells.
Explanation:
The number of cells produced in a week can be calculated using the formula 2^n, where n is the number of generations, and each generation represents a 24-hour cell cycle. Since a plant cell completes the cell cycle in 24 hours, we can assume that each day is equivalent to one generation. Therefore, the number of cells produced in a week would be 2^7, which equals 128 cells.
If a paramecium caudatum swims from a hypotonic to isotonic environment, will it’s contractile vacuole become more active or less? Why?
Answer:
The correct option is less.
Explanation:
outside an organism's body.
A hypotonic environment can be described as an environment in which the amount of solvent is more outside the cell as compared to the inside of the cell. The amount of solutes is more inside the cell. Hence, water tends to move inwards by osmosis in such an environment.
An isotonic environment can be described as an environment where the concentration of solutes and solvents is the same inside and outside of a cell.
When paramecium caudatum would be in a hypotonic environment, its contractile vacuole will be more active to pump the excess water. In an isotonic environment, there will be no or very less water for the paramecium to pump out of the body. Hence, contractile vacuole will be less active.
A Paramecium caudatum's contractile vacuole becomes less active when the organism moves from a hypotonic to an isotonic environment. This is because in an isotonic environment, there is no net movement of water, so the need for the vacuole to pump out excess water is diminished.
Explanation:When a Paramecium caudatum moves from a hypotonic to an isotonic environment, its contractile vacuole would become less active since the water concentration inside and outside the cell will be equal, thus, eliminating the need for the vacuole to remove excess water. In a hypotonic environment, water molecules move into the paramecium due to osmosis, causing the organism to swell. As a response, the paramecium's contractile vacuole pumps out water to prevent the cell from bursting. However, in an isotonic condition, the relative concentrations of solute and solvent are equal on both sides of the membrane, which means that there is no net movement of water. Therefore, the contractile vacuole in the paramecium does not need to be as active in pumping water out of the cell.
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Refer to the cladogram shown above. The numbers 1 through 5 represent species that exist today. What’s the most recent common ancestor of species 1 and 4?
Answer:
Species C is the most common ancestor of species 1 and 4.
Answer:
Species C.
Explanation:
In a cladogram, any two species which originate from the same branch of the tree, share common ancestry. As we can see in the diagram, the species 1 and 4 have a common touch base with the branch of tree arising out of species C, therefore both species 1 and 4 have some characteristics common /similar to that of the species C.
Therefore answer is species C
What is a stage of both technological design and scientific investigation?
conduct an experiment
research related information
design the solution
develop a hypothesis
Answer:
Research related information
Explanation:
Research related information can be the stage. This is because it makes use of technology and scientific investigation..
Sorry if I'm wrong :'(
Which best compares body cells and sex cells?
O Both body cells and sex cells are formed through mitosis.
O Both body cells and sex cells are produced from a diploid cell.
O Both body cells and sex cells involve one cell division of the nucleus.
* Both body cells and sex cells are involved in producing a zygote.
Its B. Both body cells and sex cells are produced from a diploid cell.
Answer:
B
Explanation:
Correct in edge 2020
HURRY !!! Which best describes the structure of the molecules that make up proteins?
O
A. Carbon + hydrogen + oxygen
B. Phosphate + sugar ring + nucleotide base
O
C. Hemoglobin + oxygen + iron
O
D. Carboxyl group + amino group + side chain
The option that best describes the structure of the molecules that make up proteins is D. Carboxyl group + amino group + side chain.
What are proteins made up of ?Proteins are made up of amino acids, which are molecules that contain a carboxyl group (-COOH), an amino group (-NH2), and a side chain (R). The carboxyl group and amino group are the reactive groups of amino acids, and they are responsible for the bonding of amino acids together to form proteins.
The side chain of an amino acid can vary in structure and chemical properties. This variation is what gives proteins their different properties and functions.
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