Final answer:
The independent variable in Harrison's experiment is the type of soil, the dependent variables are the height and number of leaves of the roses, and the control is a separate group of roses grown in a standardized soil. The constants include factors like water, sunlight, temperature, and planting conditions.
Explanation:
The independent variable in Harrison's experiment is the type of soil (potting soil, clay, sand, and soil found outside his yard), as this is the factor that is being changed or manipulated. The dependent variables are the height and number of leaves of the roses, as these are the variables that are measured and are expected to be influenced by the type of soil. The control in this experiment would be a separate group of roses that are grown in a standardized soil that is known to be suitable for rose growth.
The constants in Harrison's experiment would be factors that are kept the same across all groups of roses, such as the amount of water, sunlight, temperature, and planting conditions. These constants ensure that any differences observed in the dependent variables can be attributed to the independent variable (type of soil) and not other factors.
Fossils are MOST valuable in helping to determine the _____ age of a rock. A. relative B. absolute C. relative or absolute
Answer:
A. Relative
Explanation:
Fossiles can scienctist a time period but can not give scientist a defenitive date.
Answer:
A. Relative
Explanation:
Which evolutionary mechanism caused the increase in dark-colored Biston betularia moths in England in the 1800s? genetic drift natural selection overproduction gene flow
Answer:
Natural Selection is an evolutionary process that caused the increment of dark-coloured Biston betularia moths in England. It happened due to increase of air pollution in the industries. The bark of the trees became darker because of the deposition of pollutants.
In order to save itself from predators, the species of Biston betularia evolved itself to a dark coloured species so that the predators gets confused between the bark of the tree and the Biston betularia.
Answer:
natural selection
Explanation:
gradpoint
1. Karen wanted to figure out what type of liquid worked best for growing beans. She watered
one with coca-cola, one with lemonade, and one with just water. After one week, she
measured how high they had grown.
a. Independent Variable (IV):
b. Dependent Variable (DV):
c. Constants:
d. Experimental Group:
e. Control Group:
Answer:
IV: liquids
DV: beans
Constants: none (?)
Experimental Group: coca-cola and lemonade watered beans
Control Group: beans with water
Explanation:
i'm almost certain there are no constants in the scenario
The various variables and their examples are :
a) Independent variable : Liquids
b) Dependent Variable : Beans growth
c) Constant : Beans
d) Experimental Group : Beans watered with Coca-Cola and lemonade
e) Control Group : Beans watered with water
An independent variable in an experiment is the variable that has a direct effect on the dependent variables in an experiment, and in this experiment the type of liquid has a direct effect on the dependent variable ( Beans growth ).
The dependent variable in this experiment it is the beans growth because is dependent on the type of liquid used
The amount of beans used in the experiment is constant in this experiment
The control group in an experiment is the group not subjected tot the experimental process but serves as a measuring/reference group in the experiment. ( i.e. beans watered with clean water )
Experimental group : The experimental group is the group exposed to the independent variable ( beans watered with Coca-Cola and Lemonade )
Hence the various variables associated with the experiment are as listed above.
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What is a model?
A.a simplified, constructed version of a complex object or idea
B.an alternative, upgraded version of a complex object or idea
C.a detailed, more accurate version of a simple object or idea
D.a well-researched, identical copy of a complex object or idea
Answer:
C. a detailed, more accurate version of a simple object or idea
Explanation:
A model is a detailed, more accurate version of a simple object or idea.
HELP ME ASAP
Which resources would two different species in the same community
compete with each other for? Select the three correct answers.
A. Mates
B. Food
C. Space
D. Water
Answer:
b c and d
Explanation:
they are from different species therefore would not compete for same mates.
Answer:
food, space, water
What gets rid of cell waste by breaking down larger molecules into smaller ones
Answer:
Lysosomes
Explanation:
is also called as suicidal bag of the cell as it is involved in digestion of worn out or damaged cell or large molecules into smaller one by secreting digestive enzymes. The smaller molecules is excreted out of the cell though cell membrane.
5. The modern model of the atom shows
that electrons are
A. combined with neutrons in the nucleus.
B. located in a solid sphere covering the
nucleus.
C. orbiting the nucleus in fixed paths.
D. found in regions called orbitals.
o nobis
The answer is D. The first two answers would relate to neutrons and protons and the third answer is false due to electrons never found in a fixated path.
Answer:
D. found in regions called orbitals
Explanation:
Orbitals are regions in the electrosphere of the atom where the probability of finding the electron, or the wave function that describes the motion of an electron, is greatest.
According to Pauli's Exclusion Principle, each electron has a maximum of two electrons. For orbitals that do not have both electrons, we say they are incomplete and that they are isolated or unpaired electrons.
In addition, when filling orbitals, ie, doing electronic distribution, this should be done according to the Hund Rule or Maximum Multiplicity Rule, which says that this filling should be done in a way that gets as many as possible. of unpaired orbitals.
Atoms are made up of
protons
neutrons
compounds
elements
electrons
Answer:
protons, neutrons and electrons
Every cell in the body requires oxygen for respiration so that sufficient energy can be produced. Carbon dioxide, a waste product, is also produced and needs tone removed. Therefore, the levels of both gasses must be regulated. How does this explain the changes in your pulse rate?
Please help me google isn’t doing its job and I’m so confused
Answer:
as explained below:
Explanation:
it results as follow:
while you are jogging or doing any physical activity than your body requires alot of energy and produce a lot of carbon dioxide which causes the heart to beat fast as to remove co2 and take o2 from the blood leading to higher rate of pulse.
on the secon hand if you are sedentary , consumption and production of o2 and co2 respectively will decrease leading to the slow beating of heart leading to low pulse
Final answer:
The level of carbon dioxide in the blood is closely monitored to maintain homeostasis. When there is an excess of carbon dioxide, the brain triggers a faster pulse rate to increase breathing and remove the excess carbon dioxide.
Explanation:
The level of carbon dioxide in the blood is closely monitored to maintain blood gas and pH homeostasis. Cells in the brain detect the level of carbon dioxide and adjust the rate of breathing accordingly. When the level of carbon dioxide becomes too high, the brain triggers a faster pulse rate to increase the rate of breathing and remove the excess carbon dioxide. This helps to regulate the levels of both gases in the body.
What was the United States' first response to the terrorist attacks of September 11, 2001?
Answer:
To bring down everyone in the building and get all of the army’s out and the firefighters and police to investigate
Explanation:
Answer:
to invade afghanistan and topple the taliban goverment
Explanation:
Which of the following situations accurately describes a difference between a food chain and a food web?
Explanation:
Food chain is the chain in which the organisms of higher trophic level feeds on its immediate lower trophic level. Plant is the autotroph i.e., it produces its own food and animals and insects of higher trophic level feeds on it.
Ten percent of energy is passed from one trophic level to other trophic level as some portion of the energy is to carry out metabolic activity. Food web is interlinking of numerous food chains.
As population growth and countries continue to develop The demand for large fish has been steadily increasing
Answer:
The population is growing day by day and the food requirement is also increasing in the same rate. The treatment of large fish is also increasing because it is a supplement of protein and food for the humans.
Explanation:
The demand of life is increasing because in every country there are a lot of water bodies which contains fresh water and the land of country is surrounded by oceans or sea is which contains marine life. The people are dependent on plants and animals for the food.
Humans look out for animals as their part of food when plants does not meet all the requirement like minerals proteins etc. Fish is a good source of protein and it is very beneficial for the health of humans. Therefore the demand of large fish is increasing day by day.
A hypothetical organ has the following functional requirements: (1) the ability to resist surface abrasion and mechanical stresses; (2) the ability to contract involuntarily when stimulated by cells of the nervous system; and (3) the ability to resist tension in many different planes of force. The organ needs one tissue to carry out each of these requirements, and it also needs one tissue to "glue" all other tissues together, and one tissue to stimulate the contracting cells. What are the five tissues that will make up this hypothetical organ? Justify your choices.
Answer:
The five tissues needed that could make up this hypothetical organ are stratified squamous epithelial tissue, smooth muscle tissue, dense irregular connective tissue, loose connective tissue, and nervous tissue.
Explanation:
Ability to resist surface abrasion and mechanical stressesStratified squamous epithelial tissue
This consists of scale-like cells stacked together in layers that provide a barrier that is resistant to abrasions and wear-and-tear. This is also the most common type of stratified epithelium in the body. The top layer of this tissue has two types: keratinized, lined with dead cells with keratin, and non-keratinized, also with dead cells but without the keratin. In the human body, the skin is composed of stratified squamous epithelium.
Ability to contract involuntarily when stimulated by cells of the nervous systemSmooth muscle tissue
Smooth muscle, known for its non-striated appearance, is a kind of involuntary muscle cells that are stimulated by neural signals by the autonomic nervous system, hormones, and local factors such as a wall stretch of a certain organ, inflammation of visceral/parietal organs, etc. In the human body, this is mostly found in the walls of blood vessels and organ systems.
Ability to resist tension in many different planes of forceDense irregular connective tissue
This is a kind of connective tissue made up of collagen fibers arranged randomly. This creates greater strength and support in all directions. It can also return to its original shape even after stretching.
One tissue to "glue" all other tissues togetherLoose connective tissue
Also known as areolar tissue, it is loosely made up of collagen, elastin, and reticular fibers, and lots of ground substance. It is arranged in a web-like fashion and serves as the "cement" which fills in spaces between tissues.
One tissue to stimulate the contracting cellsNerve tissue
It is a specialized kind of tissue responsible for communication within the body. It transmits and receives signal impulses throughout the body. The 2 types of nervous tissues are neurons and neuroglia.
The hypothetical organ's structure would include epithelial tissue for abrasion resistance, muscle tissue for involuntary contractions, connective tissue for tension resistance and structural cohesion, and nervous tissue for stimulation of muscle contractions.
The five tissues that would make up this hypothetical organ based on the given functional requirements are:
Epithelial tissue, since it can resist surface abrasion and mechanical stresses, meets the first requirement.Muscle tissue, especially smooth muscle, has contractility and can contract involuntarily when stimulated by the nervous system, fulfilling the second requirement.Connective tissue, because it has toughness and pliability, allows it to resist tension in multiple planes of force, addressing the third requirement.Another role of connective tissue is to 'glue' all other tissues together within an organ, ensuring structural integrity.Nervous tissue would be necessary to coordinate the contractions of the muscular tissue, thus fulfilling the role of stimulating the contracting cells.The arrangement of these tissues is crucial as they form the structural and functional basis of the hypothetical organ, ensuring it performs its specific tasks effectively.
What happens to the total energy as the skater moves down and up the U-shaped ramp?
There is no change will be happen in total energy, when skater moves down and up the U-shaped ramp.
What is energy ?In order to accomplish work and to produce heat as well as light, energy must be delivered to a body or even to a physical system. Energy would be the quantitative attribute that does this.
What is total energy?Total Energy means the sum of all final energy used at a certain branch or variable. Because energy data has been entered directly, total energy can be distinguished from overall energy intensity.
There is no change will be happen in total energy, when skater moves down and up the U-shaped ramp.
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Final answer:
The total energy of a skater moving down and up a U-shaped ramp remains constant, with gravitational potential energy converting to kinetic energy as the skater descends, and kinetic energy converting back to potential energy as the skater ascends.
Explanation:
When a skater moves down and up a U-shaped ramp, the total energy of the system is conserved, assuming there is no friction or air resistance. As the skater descends the ramp, gravitational potential energy is converted into kinetic energy, making the skater speed up. This conversion continues until the skater reaches the lowest point of the ramp. When the skater moves up the other side, kinetic energy is converted back into gravitational potential energy, causing the skater to slow down. The highest point the skater can reach on the opposite side will have the same gravitational potential energy as the initial height if no energy is lost to friction or air resistance.
These energy transformations demonstrate the principle of conservation of mechanical energy, which states that the sum of kinetic energy and potential energy in a closed system remains constant if only conservative forces, like gravity, are at work.
The frequency of a certain trait in a population will increase over many generations if which of the following is
true?
A)The trait is carried by all members of the population, but expressed only in a few.
B) Those organisms with the trait have better reproductive success than those without it.
c) Those organisms without the trait interbreed freely with those that have the trait
D)There is a sudden change to the environment that reduces the population with the trait
Answer:
C
Explanation:
I saw the exact same question on my test and I got it right
The frequency of a certain trait in a population will increase if those organisms without the trait interbreed freely with those that have the trait.
What is the frequency of a population?The frequency of a population is the allele frequency, which is common in a population.
It is determined by the count of times an allele appears in a population.
It is also called relative frequency.
Thus, the correct option is C, Those organisms without the trait interbreed freely with those that have the trait.
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What is the independent variable?
A. The height of the plant
B. The intensity of the light
C. Sunlight
D. The color of the light
Answer:
sunlight
Explanation:
sunlight doesn't depend on any of the other factors
A very acidic pH level is _____, and a very basic pH level is _____. 1;13 13;1
Answer:
A very acidic pH level is 1, and a very basic pH level is 13.
I'm not sure I understand about your ratios, whether they are the choices or just numbers.
Explanation:
On the pH scale, the more you go to the left, the more acidic the solution is. Numbers below 7 are considered acidic, and the lowest number is the most acidic. The more you move to the right, the more basic or alkaline the solution is. Numbers above 7 are considered basic. So the higher the number of that side of the scale, the more basic stuff is. 7 is considered neutral.
Hope this helps you!! Feel free to leave any questions in the comments :)
Answer:
1; 13Explanation:
Homologous and analogous structures are some of the types of evidence that support the theory of evolution
Please select the best answer from the choices provided
OT
OF
Save and Exit
Mark this and return
Next
Next
Submit
Answer:
True. Homologous structures provide evidence of a common ancestor.
Norman thinks that the brain function of students suffers when they receive less sleep. He predicts that students who get less sleep before an exam will receive lower test grades. To investigate his idea, he tests two groups of chemistry students. Group 1 receives four hours of sleep, while Group 2 receives the recommended eight hours of sleep the night before the exam. Both groups consume the same foods before testing and take the same exam in the same room. The room has a constant temperature and level of light for all students. What is the independent variable in Norman's investigation?
The independent variable is the amount of sleep the students get. The independent variable is what you change in an experiment. Since one group received 4 hours of sleep and the other group received 8 hours, that is the independent variable.
The range of grades students receive on their exam will be the independent variable in Norman's investigation.
What is an independent variable?The term "independent variable" means exactly what it seems like. It is a variable that is independent of any other variables you are attempting to measure. For illustration, age could be an independent variable.
A dependent variable is one that keeps changing as a result of the manipulation of the independent variable.
It's the outcome you're after, and it "depends" on your independent variable. Dependent variables are also known as Response variables in statistics.
In Norman's study, the independent variable will be the range of grades students receive on their exams.
Thus, this is the independent variable in the investigation done by Norman.
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Pure water is neutral what is the appropriate justification for this
Answer:
Pure water is neutral in nature and this can be justified via the fact that when water is broken down, it gives equal concentration of acidic (H+) and basic(OH-)
Explanation:
why has australia moved 6ft in the last 20 years?
tectonic plates in the earth's crust has moved almost every piece of land from its original spot. On average, tectonic plates moved land masses about 2.3 CM a year.
Which statement best describes the relationship of photosynthesis and energy?
uno)The process of photosynthesis is energy-storing because the process converts light energy into chemical energy, which is stored in the bonds of glucose.
the number after 1)The process of photosynthesis is energy-releasing because the process converts light energy into free energy that can be used for cell functions.
:3 ) The process of photosynthesis is energy-conserving because no energy is used throughout the process of forming glucose and oxygen molecules.
forrrr)The process of photosynthesis is energy-wasting because photosynthesis is an inefficient process that depletes the cell of energy stored in the bonds of glucose.
Answer:
the number after 1:the process of photosynthesis is energy realising because the process converts light energy into free into free energy that can be used for cell functions
Explanation:
in has some explanations about photosynthesis
First statement best describes the relationship of photosynthesis and energy.
Answer: Option A
Explanation:
All living things need food to survive. The plants prepare their own food through the process of photosynthesis. The process of photosynthesis involves the absorption of light energy derived from the sun and it is converted into chemical energy by the leaves and stored in the form of glucose.
The photosynthesis takes place inside the leaf in the presence of water, carbon dioxide and sunlight. The leaves have tiny cell like structures called the chloroplasts and they have a green pigment called chlorophyll which absorbs the sunlight. It helps to release oxygen into the atmosphere rest are stored as nutrients for the plants growth.
2. Which of the following sequences of organization is likely to
be seen in a multicellular organism, going from smallest to
largest?
a) cell, organ, tissue, organism
b) cell, organ, system, tissue
c) cell, tissue, system, organism
d) organism, system, organ, tissue
The levels of organization in a multicellular organism from a simpler perspective to a more detailed and complex one is cell, tissue, system, organism.
The cell is the minimum unit of life: all living beings are made up of at least one cell (some of only one of them, called unicellular; others of more than one, called multicellular organism).According to their functions and needs, cells are grouped together to fulfill a common function, this grouping of common cells is called tissue.The systems are composed of the different organs and tissues of the body cooperating, helping each other, or working together.The total of the organs, tissues and cells of a living being compose it, and define it as an individual, that is, an organism.Therefore, we can conclude that matter is organized in levels of complexity, these are, from smallest to largest are: cell, tissue, system, organism.
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For each idea listed, select the thinker who is most associated with originating that idea.
developed calculus
was the first to study the heavens through a telescope
developed a model of the universe with the Sun at the center
Developed Calculus -
Gottfried Wilhelm Leibniz
Around the 1670s, two great men — Sir Isaac Newton of England and Gottfried Wilhelm Leibniz of Germany — discovered and developed calculus independently from each other.
Who was the first to study the heavens through a telescope -
Galileo Galilei
Galileo Galilei (1564-1642) was part of a small group of astronomers who turned telescopes towards the heavens.
Who developed a model of the universe with the Sun at the center
Nicolai Copernicus
The Earth-centered Universe of Aristotle and Ptolemy held sway on Western thinking for almost 2000 years. Then, in the 16th century a "new" (but remember Aristarchus) idea was proposed by the Polish astronomer Nicolai Copernicus (1473-1543).
Answer:
newton was the first one who developed calculus.
Explanation:
6. Cell membranes are primarily composed of a double layer of phospholipids. Why are phospholipids particularly
well suited to serving as membranes?
A
They can be used to metabolize starches.
B. They create a selectively permeable membrane.
C.
They can work together to perform chemiosmosis.
D.
They form a membrane that is impermeable to chemicals.
Answer:
B i hope this help
Explanation:
The cell membrane consists primarily of a thin layer of phospholipids which spontaneously arrange so that the hydrophobic "tail" regions are shielded from the surrounding polar fluid, causing the more hydrophilic "head" regions to associate with the cytosolic and extracellular faces of the resulting bilayer. This forms a continuous, spherical lipid bilayer approximately 7 nm thick, barely discernible with a transmission electron microscope.
The arrangement of hydrophilic and hydrophobic heads of the lipid bilayer prevent polar solutes (e.g. amino acids, nucleic acids, carbohydrates, proteins, and ions) from diffusing across the membrane, but generally allows for the passive diffusion of hydrophobic molecules. This affords the cell the ability to control the movement of these substances via transmembrane protein complexes such as pores and gates.
Phospholipids are particularly suited to serving as membranes because they create a selectively impermeable membrane, as option B shows.
Why are phospholipids able to create impermeable membranes?Due to its composition with fatty acids.Because of its hydrophobic tail.Phospholipids are molecules formed by fatty acids and alcohol. Fatty acids form the tail of these molecules and it is a hydrophobic structure that does not allow mixing with aqueous substances.
These tails are able to form a semipermeable structure that is very useful to maintain the selectivity of biological membranes, and controlling the entry and exit of elements.
All this can be seen in option B.
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What traits might be passed to offspring if both parents are California quails?
Answer:
Half of the DNA of one parent and half of the DNA
from the other parent to the offspring.
Example: If one parent was 72% English quail, the offspring would only be half.
what does conptt mean?
Answer:
It means consistency.
Explanation:
The results of observations and/or experiments are reasonably the same when performed and repeated.
It means consistency.
Hope this helps!
Which biome is characterized by a lack of season temperature variation, broad-leaves plants, heavy rainfall, and a close proximity to the equator?
Answer:
Rainforest.
Explanation:
The rainforest biome is located near the equator. The key words in this question are heavy rainfall, as no other biome experiences heavy rainfall.
Select three factors stem scientist study to help predict earthquakes
•magnitude
•p waves
•s waves
•seismic activity
•tsunami waves
•geological faults
Answer: p waves, seismic activity, tsunami waves
Explanation:
Which example involves a cell membrane receiving and sending messages?
O
A. A tube worm retreating from a predator
O
B. A large fish chasing its prey in the sea
O
C. A water molecule moving inside a cell
O
D. A protein forming a channel for an ion
The answers are: A and B
A. A tubeworm retreating from a predator
B. A large fish chasing is a prey in the sea
Further Explanation
The ability of cells to communicate, that is, receiving and sending signals from and to other cells, determines the interaction between unicellular organisms and regulates the function and development of the body of multicellular organisms. For example, bacteria communicate with each other in the quorum sensing process to determine whether they are sufficient before forming biofilms, while cells in animal embryos communicate to coordinate the process of differentiation into various cell types.
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Details
Class: Middle School
Subject: Biology
Keywords: cell communication
Answer:
A. A tube worm retreating from a predator
Explanation:
Cells can receive and send messages as a form of communication for a certain function within an organism to be performed. This function can be related to the regulation of some biochemical process, development of some activity and even when the organism needs to defend itself, escape or adapt quickly to environmental changes.
The ability to send and receive messages is regulated by the cell membrane. An example involves a cell membrane receiving and sending messages occurs in a situation where a tubular worm needs to retreat from a predator. At that moment, the cells communicate to carry out the escape and protection process.