Answer:
1. false as a hypothesis is an educated guess so
2. share the experiment please
3.independent
4.A
Which type of primary brain tumor usually arises in the walls of the fourth ventricle in children and in the lateral ventricles in adults
Answer:
Primitive neuroectodermal tumor (PNET)
Explanation:
They usually occur in early childhood but may become symptomatic in adult life. In children, they commonly occur in or near a spinal fluid sac known as the fourth ventricle and are called medulloblastomas.
Give an example of an excretory product and explain why it needs to be removed.
Answer:
example- urine
it is need to get rid out of body because it contains toxic substances like urea which is harmful for human body...
State two arguments people might make for not preserving botana curus.
The two-argument people might make for not preserving botana curus are they take a long time to grow, so it may not be worth the effort; there are organisms that are similar, and it may be expensive.
What is botana curus?Botana curus is a precious plant because it yields Carol, a substance that can be used to treat cancer.
Curol cannot be manufactured in a lab. Botana curus grows slowly and is an endangered species, so its ability to produce large amounts of Curol is limited.
Thus, the two arguments are they take a long time to grow, so it may not be worth the effort and there are organisms that are similar, and it may be expensive.
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What is most likely the reason Earth moves in an orbit around the sun?
Group of answer choices
Because the sun remains in motion with respect to Earth
Because Earth and the sun exert a weak gravitational pull on each other
Because Earth exerts a stronger pull on the sun than the sun exerts on Earth
Because the sun's mass creates a gravitational force that pulls Earth towards it
Answer:
because the suns mass creates a gravitational force that pulls the earth towards it
Drop a paper of piece of thermopol and piece of plastic from a height of 10 to15 feet note the time for each object to hit the ground why does the paper more time than thermopoland how did thermopol more than the plastic piece how did it happen explain
Yes, it is possible because making a paper fold takes far less time than making a thermal or plastic item. The gravitational force is the reason behind this.
What is thermocol?Polystyrene, a complicated substance, is used to make thermocol. When heated to over 100°C, it changes to a liquid condition and then returns to a solid state when cooled.
A gravitational force is defined as which draws particles or bodies together.
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In algae and plants photosynthesis happens in the?
Which dance resulted from the development of a culture technique for muscle cells
Rhythm Salsa resulted from the development of a muscle cell culture technique.
How to do cell culture?To obtain a cell culture, it is necessary to disaggregate the original tissue, which can be by mechanical force or enzymatic process. These cells are grown in an adherent layer in a single layer (monolayer) or in organoid format (3D culture) or in suspension.
With this information we can conclude that rhythm Salsa resulted from the development of a muscle cell culture technique.
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15. Which phase of biotechnology product development often involves testing in live animals?
A. Phase 2 and Phase 3 trials
B. Phase 1 and Phase 2 trials
C. Phase 4 trials
D. Preclinical trials
Preclinical studies involves the testing of live animals. The correct option is D.
What is biotechnology?The use of biology to solve problems and the to create valuable goods is referred to as biotechnology. The most common method is genetic engineering, which allows scientists to manipulate an organism's DNA.
Clinical research, a part of biotechnology includes the following phases:
Preclinical studies.Phase 0.Phase I.Phase II.Phase III.Phase IV.Testing live animals is a part of a preclinical trial that can involve certain vaccination, drug, medication, etc.
Thus, the correct option is D.
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identify a process that could cause a new pesticide resistant gene to appear in a mosquito population (short written response)
The sides of the DNA ladder are made up of a phosphate and:
a sugar called deoxyribose
a plasma called hemoglobin
a chemical called neuclaic acid
an acid called chlorophyll
Answer:
A sugar called deoxyribose.
Explanation:
DNA is made up of molecules called "nucleotides". These are:
A phosphate groupA pentose sugar [deoxyribose]A nitrogen-containing base [adenine, thymine, guanine and cytosine]Thus the first option is the right answer.
Reasons why the other options are wrong:
"A plasma called haemoglobin" is wrong as plasma and haemoglobin are related to the blood.
"A chemical called nucleic acid" is wrong as it is not what DNA's made up of. DNA and RNA are nucleic acids themselves.
"An acid called chlorophyll" is wrong as chlorophyll is related to plants.
The cells that produce testosterone in the testis are called ________.
Answer:
Leydig cells produce testosterone
In an experiment, a scientist decides to study the effect of exercise on cholesterol levels in people. He studies two set of people—those who exercise every day for an hour and those who don’t exercise at all. In this case, the statement that people who exercise for an hour may have lower cholesterol levels is
. To test this statement, the scientist would measure cholesterol levels in exercisers and non-exercisers. The cholesterol levels would be
The exercise reduces the levels of the low-density lipoproteins or the bad cholesterol. It is found that, the people, who exercise daily have a low level of low-density lipoproteins, and an increased level of high-density lipoprotein, which is also known as good cholesterol.
What is Scientific hypotheses?Scientific hypotheses, in general, are the premises within a given theory, which can be validated on the basis of a scientific method, contributing to the formulation of new hypotheses. In this experiment the theory says that cholesterol levels between people who exercise and people who do not exercise is different. Within this theory, the statement says that people who exercise for an hour may have lower cholesterol levels, is a hypothesis that will be confirmed or refuted after the experiment.
The dependent variable is summarized in the phenomena or factors explained or identified, because they are influenced or determined by the independent variable. In this experiment the independent variable is the performance (or not) of exercises. Exercise is what influences or determines cholesterol levels in this study. Thus, cholesterol levels are a dependent variable.
Hence, to check whether a person exercises regularly or not, the scientist can determine the cholesterol level.
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Based on the concept of the global conveyor belt, what happens to ocean water as it moves from Antarctica to the equator?
It transfers thermal energy to deeper layers of the ocean.
It becomes less dense and rises to the surface.
It transfers thermal energy to the area, warming the equatorial waters.
It becomes more dense and sinks to the ocean bottom.
What happens to the ocean water as it moves from Antarctica to the equator is : ( B ) It becomes less dense and rises to the surface.
Concept conveyor beltThe conveyor belt is a system of oceans which transports water and propel deep current of water bodies across the globe based on the differences in water densities.
As the ocean water moves from the Antarctica to the equator the cold ocean water mixes with the warm ocean water at the equator, which makes the water less dense and rises to the surface.
Hence we can conclude that What happens to the ocean water as it moves from Antarctica to the equator is It becomes less dense and rises to the surface.
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the study of the space around
Earth and within the universe,
including meteoroids and
galaxies that are trillions of
miles away
Astronomy is the the study of the space around Earth and within the universe, including meteoroids and galaxies that are trillions of miles away.
What is Astronomy?Astronomy is the study of everything in the universe beyond Earth's atmosphere.
It is the the study of the space around Earth and within the universe, including meteoroids and galaxies that are trillions of miles away.
In summary, it includes objects we can see with eyes, like the Sun , the Moon , the planets, and the stars .
It also includes objects we can only see with telescopes or other instruments, like faraway galaxies and tiny particles.
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The nervous system is responsible for all of the following except which of these?
1.producing red and white blood cells
2. sensing external stimuli
3. connecting sensory and motor neuron signals
4.controlling automatic body processes, such as breathing
Answer:
1.producing red and white blood cells
This is done by bone marrow and other organs.
Answer:
1. Producing red and white blood cells
Explanation:
Blood cells are not part of the nervous system and are not produced by the nervous system.
9) Genetic variation is the source for evolution. Without a variety of phenotypes, there would be no differential survival upon
which natural selection can act. Which of these are sources of the genetic variation within a population? Select ALL that apply.
A) Errors caused by DNA polymerase during replication.
B) The failure of DNA to separate during DNA replication
C) Changes to the ribosomal structure during translation
Eliminate
D) Induced changes to the genome from environmental factors
E) Fertilization of two haploid gametes during sexual reproduction.
The genetic variation occurs due to induced changes to the genome from environmental factors, fertilization of two haploid gametes during gamete fusion. The correct options are D and E.
What is genetic variation?The presence of differences in gene sequences between individual organisms of a species is referred to as genetic variation. It allows for natural selection, which is one of the primary forces driving life's evolution.
The genetic variation occurs due to induced changes to the genome from environmental factors, fertilization of two haploid gametes during gamete fusion.
Thus, the correct options are D and E.
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Answer
a,d, and e
Explanation:
i did it
Viruses do not possess all the characteristics of life. Identify those characteristics that viruses display and those they don’t display.
Viruses are organisms that share traits with both living and non-living organisms. The virus' genetic material is made up of both DNA and RNA.
What are viruses?
A virus is an infectious microorganism made up of a nucleic acid segment (DNA or RNA) encased in a protein coat. A virus cannot multiply on its own; instead, it must infect cells and make copies of itself using the host cell's components. A virus frequently kills the host cell in the process, resulting in harm to the host organism.
Viruses have the following characteristics:
Viruses have an exterior capsule layer and a specified boundary. Only the host cells provide energy to the virus. They thrive and mature, multiplying their numbers solely within the host cells.
Viruses lack the following characteristics:
A virus is a single-celled animal with no more than one cell. In the virus, there is no internal organization. If a virus is present outside of the host environment, it does not grow, develop, or require energy. Viruses do not remove trash.
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Which of the following are Phylogenetic trees also know as ?
A 2000kg vehicle travelling 30m/s takes 10s what force did the vehicle experience
A.-7000 km•m/s2
B.-6000km•m/s2
C. -5000km•m/s2
D.-8000km•m/s2
The average force vehicle experiences is 6000N. The correct option is B.
What is Newton's second law of motion?It states that the force F is directly proportional to the acceleration a of the body and its mass.
F =ma
Given is a 2000kg vehicle travelling 30m/s takes 10s.
It takes t = 10s to come to rest, then the acceleration will be
a = velocity /time
a = 30/(10)
a = 3 m/s²
According to the Newton's second law of motion.
F = 2000 kg x 3 m/s²
F =6000 N
Thus, the average force vehicle experiences is 6000N.
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1. Suppose that a sample of beef broth initially contains
16 bacterial cells. After 4.0 h, there are 1.6 × 106
bacterial cells in the sample. Assuming that the
bacteria reproduce at a constant rate, calculate the
growth rate of the bacterial population for the given
time interval.
From the calculations, the rate of growth of the culture is 2.88.
What is exponential growth problem?We apply the exponential growth problem when there is an exponential increase.
Thus, we have; P =Poe^rt
P = amount at time t
Po = amount originally present
t = time taken
r = rate of growth
1.6 × 10^6 = 16e^4r
1.6 × 10^6/16 = e^4r
1.0 * 10^5 = e^4r
ln 1.0 * 10^5 = ln e^4r
11.5 = 4r
r = 11.5/4
r = 2.88
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genetic drift simulation:
When you look at your chart, what did you notice about the fluctuations? What would you expect to see over time? were you ever close to losing an allele?
Answer:
yes
Explanation:
The consequences of genetic drift are numerous. It leads to random changes in allele frequencies. Drift causes fixation of alleles through the loss of alleles or genotypes. Drift can lead to the fixation or loss of entire genotypes in clonal (asexual) organisms
Human skin color varies widely around the world, and children do not always exhibit the exact same coloring as their parents. Based on this information, what is true about human skin color?
Answer:
Your skin colour is based on millions of years of evolution depending on where your ancestors lived and their living conditions. Skin colour varies on where you live (or came from). Children will have different tones or shades of skin from their parents due to human skin colour having multiple genes. This is an example of polygenic inheritance.
Explanation:
see the picture below to see how different skin colours depend on where they live:
hope this helps:)
Why is less energy needed for reaction to occur when enzyme is present?
Answer:
enzymes don't affect the free energy of the reactants or products
Explanation:
That is, they don't change whether a reaction is energy-releasing or energy-absorbing overall. That's because enzymes don't affect the free energy of the reactants or products. Instead, enzymes lower the energy of the transition state, an unstable state that products must pass through in order to become reactants.
Blisters on the genitals can occur during birth in babies affected by which of the following:
A.) Gonorrhoea
B.) Sypillis
C.) HPV
D.) Herpes
PLEASE CHOOSE THE CORRECT ANSWER. TY
Which is an unseen factor that affects the carrying capacity of the ocean?(1 point)
Sunlight is an unseen factor that affects the carrying capacity of the ocean.
What is Carrying capacity?Carrying capacity may be defined as the maximum number of individuals that can be supported by a habitat.
The other options under this question are water chemistry, water availability, space, and sunlight.
Water availability and space both are unlimited in the ocean habitat, while the water chemistry remains the same throughout the ocean.
Therefore, sunlight is an unseen factor that affects the carrying capacity of the ocean.
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how did life begin?
are we alone in the universe?
Answer:
Read the Quran. it tells you how did it begin
If phosphorous has 5 valence electrons, how many does sulfur have?
_____ productivity = the organic materials that remain after photosynthesis organisms in the ecosystem have used some of these compounds for their cellular energy needs (cellular respiration)
The organic materials that remain after photosynthesis organisms in the ecosystem have used some of these compounds for their cellular energy needs called primary productivity.
What is cellular respiration?
Cellular respiration is defined as the process through which organisms combine oxygen with food molecules, converting the chemical energy in these substances into life-sustaining activities and discarding, as waste products, water and carbon dioxide.
Common examples of primary producers include diatoms, coccolithophores and dinoflagellates.
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Select the correct answer from each drop-down menu.
which domains of sustainability are referenced here?
domain
the
domain incorporates cultural norms that directly impact sustainable development. the
focuses on the protection and preservation of natural and artificial resources.
The domain incorporates cultural norms that directly impact sustainable development. hence, option B is correct.
What do you mean by economic domain?The economic sphere is a social one that includes connected human behaviors and exchanges and does not exist in a vacuum. Individuals, companies, organizations, and governments can all act as economic agents.
Cultural norms are incorporated into the economic sector and have a direct effect on sustainable development. The conservation and preservation of both natural and man-made resources are the major objectives of the environmental domain.
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Women make up 46% of this class qualitative or quantitative?
Answer:
Examples of qualitative characteristics are gender, race, genotype and vital status. Qualitative variables are also called categorical variables. Unfortunately, it gets a little more complicated. You might think of a quantitative variable as one that can only be recorded using a number.