Answer:
10/9x
Explanation:
Start with:
8x/3x+6 // 12x^2/5(x+2)
Factor out 3 then multiply the ricprocal of that fraction:
8x/3(x+2) * 5(x+2)/12x^2
Reduce the expression with x+2, then x,
8x/3 * 5/12x
Reduce numbers w/ GCD 4
2/3 * 5/3x
Lasty, multiply the fractions [multiply numerators&denominators seperatly]
2*5/3*3x
and you get...
10/9x [yayyyy!]
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
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Answer:
True. Homologous structures provide evidence of a common ancestor.
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:
Atoms are made up of
protons
neutrons
compounds
elements
electrons
Answer:
protons, neutrons and electrons
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:
What do conversion factors Always equal?
what do penguins need to survive
Answer:
Penguins need thick skin and a lot of fat.
Explanation:
To keep warm in cold weather. They also huddle together with their friends to keep warm. And they need a colony to help protect each other and the young ones.
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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Imagine standing on a sandy beach on a warm, sunny day facing east. The sand and you are hot. You want to catch a cool breeze on your face.
Which way should you face?
A.
toward the land
B.
toward the north
C.
toward the south
D.
toward the water
E.
toward the sky
You should face towards the water. Therefore, option (D) is correct.
What is sea and land breeze?The cool breeze comes from the direction of the water because of the temperature difference between the land and the water. During the day, the land heats up faster than the water due to its lower heat capacity. As the warm air above the land rises, cool air from the water is drawn in to replace it, resulting in a cool breeze blowing from the water towards the land.
Sea and land breezes are local winds that occur in coastal regions due to differences in temperature and pressure. During the day, the land heats up faster than the sea, causing the air above the land to warm and rise. This creates a low-pressure area over the land. At the same time, the air above the cooler sea remains relatively stable, creating a high-pressure area. The air flows from high pressure to low pressure, so cooler air from the sea moves towards the land, creating a sea breeze.
At night, the opposite occurs. The land cools down faster than the sea, creating a high-pressure area over the land and a low-pressure area over the sea. This causes air to move from the land to the sea, creating a land breeze. Sea and land breezes can affect the weather in coastal regions and can also impact local marine ecosystems.
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Function
Choose a plant organ. Write an explanation of
how that organ's structure relates to its function.
Be specific and detailed.
Answer:
Epidermis, in botany, outermost, protoderm-derived layer of cells covering the stem, root, leaf, flower, fruit, and seed parts of a plant. The epidermis and its waxy cuticle provide a protective barrier against mechanical injury, water loss, and infection.
Answer:
One of the ways that plant systems and tissues work together is in the transport of materials such as water, called transpiration. In transpiration, water is taken into the plant and then evaporates out of the leaves. First, water is taken in through pores in the dermal tissue of the roots and brought to the xylem of the vascular tissue. The vascular tissue then transports it up through the stem and into the leaves. Once in the parenchyma cells of the ground tissue of the leaves, photosynthesis and cellular respiration occur, using that water. The water is then released through guard cells of the dermal tissue into the atmosphere.
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
Which represents polygenic inheritance of traits?
a cow that has red and white dominant coloring
a mix of blue, green, and brown eye colors
a plant that has pink flowers produced from a plant that has red flowers and a plant that has white flowers
a plant that has green seeds produced from a plant that has yellow seeds and a plant that has green seeds
Answer:
a mix of blue, green, and brown eye colors
Explanation:
Answer:
A mix of blue, green, and brown eye colors.
Explanation:
Polygenic inheritance may be defined as the type of inheritance that are controlled by the multiple genes. Different genes are involved for the expression of a particular trait.
Polygenic inhertance is measured in the different population. Different phenotypes are observed in the traits that are controlled by polygenic inheritance. The eye color is controlled by than three different genes and different eyes color (phenotype) like brown, blue and green are observed.
Thus, the correct answer is option (2).
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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Stella thinks that if people are exposed ultraviolet light then they are more likely get skin cancer. Stella designs an experiment wherein sample A consisted of people were exposed to ultraviolet light and sample B was not.
what is the independent variable?
Answer:
The amount of UV light exposure.
Explanation:
The independent variable is the one variable that an individual must change during an experiment in order to investigate or test the dependent variable. Basically their relationship to the experiment or between themselves can be easily remembered through their names: The independent variable is the one that's controlled by the researcher and therefore does not depend on other variables from the experiment (amount of UV light), the dependent variable depends on the independent variable since its often the result from the latter's variations (cases where people developed skin cancer) and finally, the controlled variable is the one that's kept the same throughout the experiment (Time exposed to sunlight within group A or method through which patients were tested for skin cancer).
In which time frames can short-term environmental changes occur? Check all that apply.
in days
in minutes
over hundreds of years
over thousands of years
over billions of years
Answer: in days
in minutes
over hundreds of years
Explanation:
The short term environmental changes are those changes which are caused by the catastrophic events. These changes remain for a short period of duration as they are temporary and the environment attains stability after these changes. These includes drought, flooding, volcanic eruption, pollution, blizzards, impact of asteroid or comet on earth and smog.
The short term environmental changes can be seen in days, in minutes and over hundreds of years but as the environment receiver the effect of these changes also diminishes in the environment.
Answer:
A) IN DAYS
Explanation:
EDG 2020
What are the functions of the promoter sequence and the terminator sequence in DNA?
a, b, c, or d?
Answer:
A
Explanation:
Promoter region on DNA is the point on DNA where polymerase enzyme attaches so it can begin the translation of genes/operon downstream. Terminator region on the DNA is the point that causes the polymerase to terminate transcription. For example, the terminator regions may cause the transcribed nascent mRNA to form a hairpin structure at the terminator sequence hence causing the polymerase enzyme to detaches from the DNA strand.
Promoter sequence initiates transcription, while the terminator sequence ends it in DNA. Correct answer is 1. Promoter sequence begins transcription, while terminator sequence ends it.
Promoter sequence: A DNA sequence where RNA polymerase binds to initiate transcription. It determines when and where transcription starts. Consists of specific nucleotide segments recognized by RNA polymerase or regulatory proteins.
Terminator sequence: A DNA sequence indicating where transcription should end. It helps in the release of RNA polymerase and stops the addition of nucleotides to the RNA strand.
In summary, the promoter sequence begins transcription by providing a binding site for RNA polymerase, while the terminator sequence ends transcription by signalling the enzyme to detach.
complete question:
What are the functions of the promoter sequence and the terminator sequence in DNA?
Promoter sequence begins transcription, while terminator sequence ends it.Promoter sequence begins replication, while terminator sequence ends it.Promoter sequence promotes translation, while terminator sequence begins it.Promoter sequence initiates unwinding DNA, while terminator sequence winds itWhy is clear urging an especially damaging forestry practice for species that rely upon older trees for their survival
Answer:
'Genetics in Swedish forestry practice' -- subject(s): Afforestation, Forests and forestry, Genetics
'Den oligarchs astringency och partaken' -- subject(s): Afforestation, Forests and forestry, Genetics, Trees
Explanation:
12. Which organelles are known as the "power plants"
of the cell because they transfer chemical energy
from food to compounds the cell can use?
a. mitochondria
b. ribosomes
c. lysosomes
d. vacuoles
The organelles known as the 'power plants' of the cell are the mitochondria. They convert the chemical energy from food into compounds the cell can use, through a process called cellular respiration.
Explanation:In biology, the organelles that are referred to as the 'power plants' of the cell are the mitochondria. These organelles are responsible for the critical task of producing energy for the cell. This process works by converting chemical energy found in the food we consume into compounds that the cell can use. This is achieved through a process known as cellular respiration. Other organelles, such as ribosomes, lysosomes, and vacuoles, each serve their unique functions, with ribosomes responsible for protein synthesis, lysosomes for waste disposal, and vacuoles for storage, but it's only the mitochondria that does the work of a cell's energy 'power plant'.
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A kilogram in an SI unit. Which quantity might measure in kilograms
A.temperature
B.mass
C.length
D.electric current
A quantity that might be measured in kilograms is mass. You can tell it is not length, because that is meters, and temperature is Celsius. It is not electrical current because that is measured in watts.
If you need more explanation, comment below and I'll do my best.
Which statement best relates to how the structure of a lipid influences the lipid’s function?
A phospholipid has a charged head and an uncharged tail.
Lipids contain fatty acids and glycerol.
The ends of the lipid are attached to each other.
A lipid is made up of a long chain of phosphorus molecules.
Answer:
The correct answer is B) Lipids contain fatty acids and glycerol.
Explanation:
Lipids are mostly found in the cell membrane, where its function is to make a barrier for protection and control. Therefore, its structure facilitates the formation of a bilayer with two different types of solubility, due to the glycerol heads (hydrophilic) and the tails made of fatty acids (hydrophobic) located in the exterior and interior face of the membrane and on the middle, respectively.
What substances are produced by cellular respiration?
O2 and H20
CO2 and C6H1206
O 02 and C6H1206
CO2 and H20
Answer:
CO2 and H2O is correct and now I just have to fill space sooooo
is this active transport?
Answer:
your not being specific enough
Explanation: what is active transport? be more specific so i can answer this for you.
Some bacteria cause diseases in humans and other organisms, but
O A. we don't know of any archaea that are harmful.
O B. viruses are unable to infect humans.
O C. antibiotics can always be used to treat bacterial infections.
O D. diseases caused by bacteria aren't serious.
Bacteria can cause diseases in humans and other organisms, and not all bacteria are susceptible to antibiotics. The impact of bacterial diseases can be serious.
Explanation:Bacteria are responsible for causing diseases in humans and other organisms. While there are some archaea that can be harmful, the majority of known pathogens are bacteria. Antibiotics can be used to treat bacterial infections, but not all bacteria are susceptible to antibiotics. Additionally, diseases caused by bacteria can be very serious and have a significant impact on human populations.
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The result of cultures assimilation is a. nothing at all. b. that distinct groups blend into a single group with common cultures and identities. c. an increase in segregation. d. ethnic traditions are lost. Please select the best answer from the choices provided A B C D
Explanation:
Assimilation, or cultural assimilation, is the process by which different cultural groups become more and more alike. Assimilation is most often discussed in terms of minority immigrant groups coming to adopt the culture of the majority and thus becoming like them in terms of values, ideology, behavior, and practices.
Answer:
Option B, that distinct groups blend into a single group with common cultures and identities
Explanation:
Assimilation is a process by which different cultures mix with each other, share their customs, practices, traditions, views and beliefs and become a part of each other in a way that it lead to origin of a common culture for all.
The cultural assimilation if beneficial to the small religion sects and group of people (such as immigrants) with in a society to gel up with large social groups and thus lead to a common culture.
Hence, option B is correct
Help me with this please please please
Answer:
1. Anne ate toast, but I ate pizza
2.Rob painted a portrait, and mary chiseled a statue
3. you can imitate another artist, or you can try to be original
4. our parents went out, so we watched television
This is formed as a waste product in photosynthesis and used as a reactant in respiration.
Which of the following is NOT a characteristic of all living things? A. reproduce asexually B. made of cells C. have a metabolism D. respond to a stimulus
Please answer fast!!
Answer:
reproduce asexually
Explanation:
Most living organisms such as animals etc reproduce sexually
Answer:
Asexual reproduction is not a characteristic of all living organisms.
Explanation:
Reproduction is a life process which is essential to sustain a population of an organism. Asexual reproduction is not the only form of reproduction. Organisms reproduce sexually or asexually.
All the other given options are characteristic features of organisms. Every living organism is composed of cells. Depending on the number of cells organisms can be unicellular or multi cellular.
Every organism is able to perform various functions because they have a metabolism. Organisms have different ways of responding to stimuli.
Archimedes' Principle relates primarily to _____. density, mass, boiling and freezing buoyancy.
Answer:
buoyancy
Explanation:
According to Google "Archimedes' principle states that the upward buoyant force that is exerted on a body immersed in a fluid"
I know a lot on this topic but I wanted to be sure my answer was to the point instead of rambling. If you need further help let me know!
Answer:
buoyancy
Explanation:
Neural signals from olfactory cilia are transmitted to the __________ and then transmitted to the __________ and other areas of the brain.
A. thalamus . . . olfactory cortex
B. olfactory bulb . . . olfactory cortex
C. olfactory cortex . . . olfactory bulb
D. olfactory bulb . . . thalamus
The correct answer is B. olfactory bulb ... olfactory cortex.
Neural signals from olfactory cilia are transmitted to the olfactory bulb and and then transmitted to the olfactory cortex and other areas of the brain.
Answer: Option B
Explanation:
All the signals that we receive through are body are sensed through the brain. The olfactory is an important center of the brain that is responsible for this activity.
The olfactory bulb receives the smell from the olfactory cilia, that then takes it to the cortex, then transfers it to the other parts of the brain and make us sense the smell.
Answer:
b. olfactory bulb . . . olfactory cortex
Explanation:
edge
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.
compare protons ,electrons, and neutrons with respect to location within atoms, eletric charge and mass
Answer:
Protons are positively charged, Electrons are negatively charged, and Neutrons are neutrally charged as in no charge positive or negative.
Protons and neutrons are in the middle (nucleus) of the Atom while the electrons are in shells or orbitals that surround the nucleus of an atom.
Protons have +1 mass, electrons have -1 mass, and neutrons have 0 mass.
- Que
Protons (+1 charge, 1 amu) and neutrons (no charge, 1 amu) are located in the nucleus, while electrons (-1 charge, approx. 0 amu) orbit the nucleus. The mass of protons and neutrons is about 1836 times greater than the mass of an electron. These subatomic particles define the properties and chemical behavior of elements.
Protons, neutrons, and electrons are the three main subatomic particles that make up an atom. Protons have a positive charge of +1 and, along with neutrons, are found in the atom's nucleus. Neutrons are electrically neutral and have no charge. Both protons and neutrons have a mass of approximately 1 atomic mass unit (amu). The mass of protons and neutrons is nearly the same, and they constitute the bulk of an atom's mass. Electrons, on the other hand, orbit the nucleus in orbital clouds and have a negative charge of -1. They have a negligible mass, approximately 0 amu, which is about 1/1836 times the mass of a proton.
The differences in their location within the atom, electric charge, and mass define many properties of elements and their chemical behavior. While protons determine the element's identity and its positive charge balances the negative charge of electrons, neutrons provide stability to the nucleus, and electrons are involved in chemical bonding and reactions.