Answer:
An investigative question for the observation can be "How to determine whether a substance is ionic or covalent?"
All biological researches are made through the process of scientific method. A scientific method starts with an investigative question based on which a hypothesis is derived. A number of qualitative and quantitative experiments are done to test this hypothesis. Based on the results from the experiments, a hypothesis is declared true or false.
Answer:
Lab Question: Based on a substance's properties, how can you determine whether its bonds are ionic or covalent?
Explanation:
Mention the correct independent variable, the substance’s properties (such as solubility, conductivity, and state of matter).
Mention the correct dependent variable, the type of bond, ionic or covalent.
How does energy travel in an ecosystem? from consumers to producers from producers to consumers from tertiary consumers to primary consumers from secondary consumers to primary consumers
The energy travel in an ecosystem from producers to consumers. The correct option is B.
What is an ecosystem?An ecosystem is a place where all biotic factors and abiotic factors are present with each other, and they all interact with each other and help each other for energy, survival, and food.
Producers are the plants and algae which produce food and energy. They contain most of the energy. All animals depend on plants for their food and energy.
Consumers are of three types, primary, secondary, and tertiary. They consume energy either from plants or primary or secondary consumers. So energy travels from producers to consumers.
Thus, the correct option is B, from producers to consumers.
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explain how most of the electricity produced in the U.S
Answer:
According to the U.S. Energy Information Administration, most of the nation's electricity is generated by coal, natural gas, and nuclear energy. Electricity is also produced from renewable sources such as hydropower, biomass, wind, geothermal, and solar power.
Answer:
water or garbage
Explanation:
I was watching toy story and like the garbage thing they were going into the teddy bear said it made power also I was watching a africa show and they explained how water powered their city sorry if I am wrong.
Which of the following is not associated with invasive species?
A simple organism that has to compete for living space and food would have a greater chance of survival in a stable environment if it reproduced
a.asexually
b.sexually
c.once per year
d.through meiosis
What kind of erosion causes soil and rocks to fall?
A. Wave
B. Wind
C. Chemical
D. Gravity
Answer:
It's probably going to be D. Gravity
Explanation:
Because the question says "fall" it is safe to assume that gravity is the answer.
Gravity erosion is the type of erosion that causes soil and rocks to fall. This can occur through landslides, rockslides, and other slope movements influenced by factors like steepness and soil or rock type.
Explanation:The kind of erosion that causes soil and rocks to fall is D. Gravity. Gravity erosion, also known as mass wasting or slope movement, occurs when the force of gravity is strong enough to make soil, rock or debris on a slope slide down. An example might be a landslide, where soil and rock on a steep mountainside become unstable and tumble downwards, or smaller rockslides along a highway cutting. This type of erosion is interconnected with factors such as slope steepness, type of soil or rock, and the amount of water in the soil, which can add weight and decrease friction.
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If the number of sharks swimming in a coastal region increases, then the number of shark attacks on humans will also increase.
Independent variable: _______
Dependent variable: _______
The independent variable is the number of sharks in a coastal region, and the dependent variable is the number of shark attacks on humans. The inverted pyramid indicates an unusual predation level, and ecological interactions are complex, involving numerous influencing factors. Human population changes will likely impact marine ecosystems and coastal morphology.
When considering the statement "If the number of sharks swimming in a coastal region increases, then the number of shark attacks on humans will also increase," the independent variable is the number of sharks swimming in a coastal region, and the dependent variable is the number of shark attacks on humans.
Biology often involves studying relationships between different factors in an ecosystem. An increase in the number of sharks could be influenced by various factors such as population growth of seals, their primary prey, which is typically represented with years on the x-axis as the independent variable and the number of seals on the y-axis as the dependent variable.
In a study showcasing the relationship between different trophic levels like sharks, their prey, and phytoplankton, an inverted pyramid is used to illustrate a top-heavy biomass distribution where higher trophic levels have larger biomass than the lower levels, which is an unusual situation and could convey to readers that there is an unusually high amount of predation in this region, affecting population dynamics.
Examining ecological interactions between two species, such as predator and prey, highlights the complexity and potential variances in population sizes. For instance, while seal deaths may increase due to predation by sharks, an increase in births could balance the population size. Thus, direct correlations may not always be straightforward, and factors like time of year or external influences can affect the apparent relationships between variables.
how are meiosis and mitosis different
Answer:
Mitosis produces 2 daughter cells which are genetically identical to the parent cell. Each daughter cell is diploid (contains the normal number of chromosomes). This is the result of DNA replication and 1 cell division. ... Meiosis is used to produce gametes (sperm and egg cells), the cells of sexual reproduction.
Explanation:
Answer: Meiosis is used to produce gametes (sperm and egg cells), the cells of sexual reproduction. While Mitosis produces 2 daughter cells which are genetically identical to the parent cell, which is the result of DNA replication and 1 cell division.
Which most likely could cause acceleration? Check all that apply.
A flat road
Wind
Water movement
A hill
A stop light
Explanation:
Acceleration of an object is defined as the rate of change of velocity. The acceleration of an object is a vector quantity. It is caused whenever there is change in speed and the change in direction of motion of an object.
Option (1) : On a flat road, there is no chance for the change in speed or the change in direction of an object until the driver wants. As a result, on a flat road no acceleration is caused.
Option (2) and (3) : In case of Wind and water movement, it can change the speed of an object. As a result, vehicle will accelerate.
Option (4) : As the hill have curved roads, the direction of a vehicle changes. As a result, acceleration is caused.
Option (5) : A stop light, A stop light consists of three lights i.e. red light, green light and yellow light. As a light turns to red, the vehicle will decelerate and as it turns green, the driver will accelerate the vehicle.
Hence, Wind, water movement, a hill and a stop light can cause acceleration.
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A chemical reaction takes place in which erlergy is released. Arrange the reaction's characteristics in order from start to finis
lower energy of reactants
higher energy of products
higher energy of reactants
transition state
SD
lower energy of products
Answer:
lower energy of reactants lower energy of products transition state higher energy of reactants higher energy of productsExplanation:
As you may already know, a chemical reaction refers to the "mixing" of some chemical compounds called reagents, which will have the atoms rearranged among themselves, transforming them into other chemical compounds. This rearrangement of atoms is done with energy expenditure that can be perceived by the reactions that happen with temperature changes, light release, among others.
In summary, a chemical reaction occurs when energy is released, at which time the energy levels between reagents and products follow the following order:
lower energy of reactants lower energy of products transition state higher energy of reactants higher energy of productsIn an exothermic reaction, c) reactants have higher energy at the start. After reaching the transition state by absorbing activation energy, energy is released, and products have lower energy than reactants.
Reactants in an exothermic reaction c) begin higher energy of reactants . Energy is released and products have less energy than reactants after absorbing activation energy to achieve the transition state. In a chemical reaction where energy is released, this is known as an exothermic reaction. Here are the energy characteristics in sequential order:
Higher energy of reactants: Reactants start with a higher energy level.Transition state: The reactants absorb activation energy to reach the transition state or activated complex.Lower energy of products: Energy is released when new bonds form in the products, and the products have lower energy than the reactants.These steps explain the energy changes as bonds are broken and new bonds form, resulting in a net release of energy.
Determine whether each statement below describes traditional or modern classification.
TRADITIONAL OR MODERN CLASSIFICATION
based on similar appearance
based on evolutionary relationships
known as Cladistics
known as Linnaean classification
Answer:
TRADITIONAL CLASSIFICATION: based on similar appearance ; known as Linnaean classification
MODERN CLASSIFICATION: based on evolutionary relationships; known as Cladistics
Explanation:
The older classification systems were based on the morphological similarities between the organisms. One such classification was given by Linnaeus who classified plants based on the morphology of flowers and fruits.
On the other hand, the present day classification system lay more stress on evolutionary relationships of organisms. Cladistics is the system of classification that classifies organisms based on their common ancestry and does not take into consideration of morphological similarities.
one characteristic of living things is their ability to change and adapt over time true or false
Answer:
false
Explanation:
One characteristic of living things is they can't change and adapt over time.
the answer would be false
Which image models the action of the enzyme helicase in the DNA replication process?
The action of the enzyme helicase in the DNA replication process can be best represented by a zipper. Therefore option B is correct.
Helicase is responsible for unwinding the double-stranded DNA helix by breaking the hydrogen bonds between the complementary base pairs.
Like pulling apart the teeth of a zipper, helicase separates the two DNA strands, exposing the template strands for replication.
This unwinding is a crucial step as it allows the DNA replication machinery to access the individual strands and create new complementary strands.
The analogy of a zipper accurately captures the dynamic and sequential nature of helicase's role in DNA replication.
Therefore option B is correct.
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Your question is incomplete, but most probably your full question was,
Which image models the action of the enzyme helicase in the DNA replication process?
A. a sewing machine
B. a zipper
C. a glue stick
D. a copy machine
what must happen before meiosis can begin
Answer:
The correct answer is option C.
Explanation:
Before meiosis, DNA that is stacked into chromosomes must replicate. Before replication, the sex cell has two copies of each chromosome, one from mother, and one from father.
DNA replication takes place in the same manner as it does during mitosis. After the chromosome replication, the homologs are double in number, and each chromosome now has a homologous pair of chromosomes.
Thus, the correct answer is option C.
Before meiosis can begin, chromosomes must replicate.
Before meiosis can take place in a cell, such a cell must go through the interphase stage of the cell cycle.
During the interphase, the cell grows in size and volume (G1 phase) and chromosome replications occur (S phase). Thereafter, the cell synthesizes protein (G2) before being ready to undergo meiotic cell division.
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Hydrocarbon-containing natural resources burned for energy
Answer fossel fuels
Explanation:
Hydrocarbon-containing natural resources burned for energy include fossil fuels such as coal, oil (petroleum), and natural gas.
Fossil fuels are hydrocarbon-containing natural resources that have formed over millions of years from the remains of ancient plants and organisms. They are rich in carbon and hydrogen atoms and are the primary source of energy for electricity generation, transportation, industrial processes, and heating in many parts of the world.
When these fossil fuels are burned, they undergo combustion, combining with oxygen from the air to release energy in the form of heat. This energy is harnessed to produce electricity in power plants or to power engines in vehicles and machinery.
However, the burning of fossil fuels for energy also has significant environmental consequences. The combustion process releases carbon dioxide (CO₂) and other greenhouse gases into the atmosphere, contributing to the greenhouse effect and global warming. These emissions are a major driver of climate change and its associated impacts, such as rising sea levels, extreme weather events, and shifts in ecosystems.
Additionally, the burning of fossil fuels releases other pollutants into the air, including particulate matter, nitrogen oxides (NOx), sulfur dioxide (SO₂), and volatile organic compounds (VOCs). These pollutants can lead to the formation of smog and contribute to air pollution, which can have adverse effects on human health, particularly on respiratory and cardiovascular systems.
Due to the environmental concerns associated with burning fossil fuels, there is an increasing global emphasis on transitioning to renewable and cleaner energy sources, such as solar, wind, hydroelectric, and geothermal power, to reduce greenhouse gas emissions and mitigate the impacts of climate change.
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Please help! No plagiarizing please! 6th grade work! Easy and 100 points!! Compare the parts of a cell and the cell as a whole to another common nonliving system (i.e., a car, a city, etc.).
Describe the parts of a cell and their primary function.
Hello, I did this project in seventh grade, and I still have my notebook from it! Here's the answer I wrote:
A cell is like a restaurant.
The cell membrane controls what goes in and out of the cell. It is like a door because it get things in and out of the cell, much like a door gets people in and out of a restaurant.
The chloroplast makes food for the cell by photosynthesis. It is like the chef because it makes and provides food for the cell, much like a chef makes food for the customers.
The nucleus controls the activities of the cell. It is like the kitchen becuase it holds information in the cell, and the kitchen holds all of the recipes.
The endoplasmic reticulum transports materials around the cell. It is like a waiter because it transports things around the cell, like a waiter transports food around the restaurant.
The mitochondria give the cell energy by breaking down food. It is like a customer becuase it breaks down food and provides energy to the cell, much like how customers eat food that the chef makes and then pay for it, so the business does well.
The cytoplasm holds the organelles and is where chemical reactions take place. It is like the building because it holds all the organelles in the cell, and the building holds all of the restaurant activity.
The vacuole stores food, water, and waste. It is like the refrigerator because both store water and food.
The Golgi bodies pack, fold, and deliver proteins. They are like the take-out boxes in a restaurant because they hold proteins, and take-out boxes pack and hold food.
I really hopes this helps!
Answer:
A Cell Compared to a Car
E.R. = Wires and Pipes
Mitochondria = Engine
The ER is like the wires and pipes in a car because the ER is the highway of the cell, and the wires and pipes let things travel through them.
The mitochondria is like the engine because the mitochondria is the powerhouse of the cell, and the engine is the powerhouse of the car.
Golgi Apparatus = Wheels
The Golgi Apparatus would be the wheels because they both send out commands from the controller.
Cell Wall = Car Frame Membrane = Door
Nucleus
The Cell wall would be the car frame because it protects the car.
The membrane would be the door, because they both lets objects in and out.
The Nucleus would be the driver because the nucleus is the controller of the cell, and the driver controls the car.
Cytoplasm = Air Bags
Lysosomes = Exhaust Pipe
The cytoplasm is like the air bags because they both protect all of the organelles inside the cell/car.
Lysosomes are like the exhaust pipe because they both get rid of excess waste.
Ribosomes = Gasoline
The Ribosomes are like the Gasoline because Ribosomes create proteins to feed the cell, and Gasoline feeds power to the car.
Explanation:
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Which mineral test is shown in the image?
Hardness mineral test is shown in the image. The right answer is c.
The hardness of a mineral is a measure of its resistance to scratching or abrasion. It is one of the fundamental physical properties used to identify and classify minerals. The most commonly used scale for testing mineral hardness is the Mohs Scale of Hardness, which was developed by Friedrich Mohs in 1812.
The scale ranks minerals from 1 (the softest) to 10 (the hardest) based on their ability to scratch each other. Talc, with a hardness of 1, is the softest mineral and can be easily scratched by a fingernail while Diamond, is at the top of the scale with a hardness of 10, is the hardest mineral and can scratch all other minerals.
The correct answer is option c.
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The question seems incomplete. The complete question is:
Which mineral test is shown in the image?
a. Public Domain
b. Specific gravity
c. Hardness
d. Cleavage
Which two characteristics do all animals have?
O They are symmetrical and heterotrophic
O They are heterotrophs and have a backbone.
O Their cells have a nucleus and membrane-bound organelles.
O They have a backbone, and their cells have membrane-bound organelles.
The answer is the third option "Their cells have a nucleus and membrane-bound organelles." All animals have cells and each cell has a nucleus the organelle that controls all of the other organelles, and the cell membrane which protects the cell. Just like how all plant cells have a cell wall to protect the cell.
Hope this helps.
The two characteristics that all animals have in common is : ( C ) Their cells have a nucleus and membrane-bound organelles
Characteristics of animalsEvery animal posses a cell which is made of various organelles such as the nucleus which contains all the vital information such as DNA and a membrane-bound organelle which protects and shapes the cell. therfore the common characteristics of animals re the possession of nucleus and membrane bound organelles.
Hence we can conclude that the two characteristics that all animals have in common is Their cells have a nucleus and membrane-bound organelles.
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plants follow fall what domain
bacteria follow fall what domain
animals and fungi fall under what domain
Answer:
Plants are under the Eukarya,
Bacteria fall under Bacteria,
and Animals/Fungi lie under Eukarya as well
Explanation:
which asteroid is the greatest distance from the sun and why?
Answer:
Asteroid Belt
Explanation:
It is the greatest distance from the Sun because it's between Mars and Jupiter.
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Select the correct graph.
The blue curve on the graph represents the original population of a species of white rabbits. Which graph shows directional selection that occurs in a species?
Answer:
The middle graph
Explanation:
Distribution of traits across a population forms the natural selection. It can be depicted in a graph. There is three types of natural selections. These are directional selection, disruptive selection and stabilizing selection. Among the given graphs, the middle graph shows directional selection because shifting the mean of the population graph. In this type of selection, the selection works against the trait distribution.
The Punnett square above shows a cross between two sweet pea plants in Mendel's greenhouse. Both parents have blue flowers (Bb). Which statement describes the offspring expected from this cross? A) 50% white-flowered and 50% blue-flowered B) 75% white-flowered and 25% blue-flowered C) 75% blue-flowered and 25% white-flowered Eliminate D) 100% blue-flowered and 0% white-flowered
Answer:
C) 75% blue-flowered and 25% white-flowered Eliminate
Explanation:
A square representation of a cross between the gametes of the parent allele for a specific trait is called a Punnett square. A cross between a single trait among the parental generation is called a monohybrid cross.
75% blue-flowered and 25% white-flowered is expected from this cross.
The Punnett cross between the flowers can be explained as:Given,
The allele for the blue parent plant = Bb
See the attached image below for the cross.
Phenotypic ratio = 2:1Genotypic ratio = 1:2:1The physical attribute of flower colour will be seen as 75 % blue coloured and 25% white coloured flower as the cross was between two heterozygous species.
Thus, option C. 75% blue-flowered and 25% white-flowered will be observed.
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1. Explain how an ice cube left out on a counter becomes a small puddle of water.
Final answer:
An ice cube left on a counter melts into water due to heat transfer from the surrounding environment. This causes the water molecules within the ice to gain energy, move faster, break their bonds, and ultimately change from a solid to a liquid state.
Explanation:
When an ice cube is left out on a counter, it turns into a puddle of water through the process of melting. This occurs because heat is transferred from the surrounding environment, such as the warmer air in the room or the heat from the counter, to the ice cube. As the ice absorbs heat, the water molecules gain energy and begin to move faster, breaking the hydrogen bonds holding them together in the solid structure of the ice.
The transfer of heat causes the ice cube (H₂O(s)) to undergo a physical change to become liquid water (H₂O(l)), as represented by the thermochemical equation: heat + H₂O(s) → H₂O(l). The energy transfer increases the entropy of the system, as the water molecules in the liquid state are more disordered than when they were in the solid state.
Even if the room temperature is below the freezing point, an ice cube can still transform into water due to the phenomenon of sublimation, where the solid ice directly converts into water vapor without becoming liquid first. However, this process is very slow and isn't the primary method of transition when an ice cube melts on a counter. Understanding these changes at a molecular level illustrates the fascinating properties of water and its phase transitions.
which of the following phrases can be used to describe the genotype Ee
Answer:
Heterozygous dominant
Explanation:
This means that the genotype has both alleles of the gene hence referred to as heterozygous. The dominant of the two alleles is the one that is expressed in the phenotype of the individual expressing the genotype. The effects of the recessive allele are masked by the dominant allele.
Answer:
The correct answer is option C. heterozygous dominant.
Explanation:
The heterozygous condition takes place when an individual carries two distinct forms or alleles of a gene. Here in question, the genotype given is Ee which exhibits that E and e are two alleles of a gene.
The dominant allele is the form of a gene that masks the other gene if it is in a heterozygous condition. It is symbolized with the capital letter of a particular form. The masked gene is symbolized with a small letter.
The given genotype Ee is heterozygous dominant because it has one dominant allele that will mask the recessive and express itself.
Thus, the correct answer is option C. heterozygous dominant.
Planets take in _ and release oxygen gas
Carbon dioxide (CO₂)
Explanation:Plants use a process called photosynthesis. During this process, they take CO₂ from the air and water from their roots and combine them. Then, using energy from sunlight, they convert these ingredients into carbohydrates and oxygen, and the extra oxygen is released into the atmosphere.
Decide whether each statement describes the life cycle of a low-mass star or a high-mass star.
When a _____-mass star leaves the main sequence, it becomes a red giant before creating a planetary nebula and becoming a white dwarf.
When a _____-mass star leaves the main sequence, it becomes a red supergiant before creating a supernova and becoming either a neutron star or black hole.
Answer:
For the first blank ; low
For the second blank ;high
Explanation:
When a low-mass star leaves the main sequence, it becomes a red giant before creating a planetary nebula and becoming a white dwarf.
When a high-mass star leaves the main sequence, it becomes a red super-giant before creating a supernova and becoming either a neutron star or black hole.
Answer: "Low mass star" and 'High mass star"
Explanation: A low mass star is one whose mass is less than half of the sun's entire mass. Here, the size is very small, temperature is very much cold and exist for a quite long period of time. It eventually dies out becoming a white dwarf, after exiting the main sequence.
A high mass star is the one whose mass is thrice more than the sun's entire mass. Here, the size is very big, temperature is significantly high and exist for a shorter period of time. It subsequently becomes a reddish colored enormous star and dies out forming a black hole or it could form a neutron star, after coming out of the main sequence.
Four locations on Earth receive sunlight at different angles. At which of the following angles will the intensity of sunlight received be the least? 90° 75° 50° 25°
Answer:
25°
Explanation:
The Intensity of sunlight is greatest when the sun is overhead, that is when the sun is directly above, thus the rays strike the surface at right angles. In this way the intensity of sunlight will be concentrated over a smaller region compared to when the rays strike the surface at a much smaller angle like 25 degree.
Answer:
25°
Explanation:
The intensity of solar reaches the earth with greater intensity when the sun is in a position that allows the sun's rays to reach the earth at right angles. This is possible when the sun is well above the earth, at a 90º angle. The farther from this angle, the lower the intensity of the sun's rays on the earth, in that house, when the sun is at 25 ° the intensity of the sunlight received will be less.
The _______ is a process often used by scientists to help them solve problems.
Technology
The scientific method is an empirical method of acquiring knowledge that has ... The process of the scientific method involves making conjectures (hypotheses), deriving predictions ...
Which cell lacks a nucleus
Prokaryotic cells
The genetic material or DNA is loose inside and is made of a single loop.~W
Hello There!
Prokaryotic cells lack a nucleus.
A prokaryotic cell is a cell without a nucleus or a membrane bound nucleus.
TAG CTT GGC AT What kind of mutation is this?
Answer:
Point mutation
Explanation:
This kind of mutation is the change of one nucleotide in a sequence. The mutation causes a change in the translated amino acid at this position. If the change results in a codon that codes for the same amino acid, then there is no effect. However, a different amino acid may change the properties/characteristics of the translated protein causing some effect on the phenotype of the organism bearing the mutation.
if measurements of a gas are 75N 300 kPa and then the gas is measured a hey second time and found to be 50 L, describe what had happen to the pressure include which law supports this observation
Answer:
P₁V₁ = P₂V₂
300*75 = P₂*50
P₂*50= 300*75
P₂ = 300*75/50 = 450
P₂ = 450 kiloPascals.