Which type of primary brain tumor usually arises in the walls of the fourth ventricle in children and in the lateral ventricles in adults

Answers

Answer 1

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.


Related Questions

what is the function of each stage of meiosis?

Answers

Answer:

Before the cell enters meiosis, the chromosomes in a cell are duplicated (during the interphase). In meiosis I, the chromosomes condense along the center of the nucleus and pair with their homologues during crossing over. Next, the pairs of chromosomes separate and move to opposite ends of the cell.

Explanation:

After reading the passage about acupuncture, identify which statement supports the
claim that acupuncture relieves pain.
It is ancient, alternative medicine that has been used for thousands of years.
If you do research, you can find the specific types of pain that acupuncture will effectively relieve.
A New York Times reporter wrote about the effectiveness of this treatment in relieving his surgery pain.
The National Institutes of Health found it effective in reducing pain and other symptoms, but it is not clear how it works.

Answers

Number 4 is the right response. Although the mechanism of action is unclear, the National Institutes of Health found it to be beneficial in lowering pain and other symptoms.

What do you mean by acupuncture?

A professional inserts wired-thin needles into certain locations on the body during acupuncture, an age-old Chinese therapy. The needles numb the discomfort. Some people think the method works, while others claim it just has a placebo effect. The National Institutes of Health discovered that it works well to lessen pain, nausea, and vomiting, although it is still not clear how its works.

The National Institutes of Health found acupuncture to be beneficial in lowering pain and other symptoms, although it is unclear how it works, according to the passage on acupuncture, which supports the claim that acupuncture improves pain.

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I AM SO CONFUSED PLEASE HELP THIS IS ON MY STUDY GUIDE FOR FINALS!!!!

Answers

The first figure makes reference to the energy flow in a ecosystem, whereas the second one refers to the steps of cellular respiration.

What is cellular respiration?

Cellular respiration is a series of cellular reactions aimed at generating energy in the form of ATP.

Cellular respiration has three sequential steps, i.e., glycolysis, the Krebs cycle and oxidative phosphorylation.

In conclusion, the first figure makes reference to the energy flow in a ecosystem, whereas the second one refers to the steps of cellular respiration.

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For this assignment, you will develop a scientific model on a poster that illustrates the role of photosynthesis and cellular respiration in the carbon cycle. Your model should also show how carbon cycles the Earth’s four spheres. Once you have completed your model, you will write a paper with several paragraphs describing the content of your model in more detail. (More than 1 paragraph pls)

Answers

Answer:

I don't speak English, I only translate, I'm sorry, but you like Kunno, I know, hush, I said hush, I don't talk to Kunno fans

How long does it take a lemon tree to produce fruit.

Answers

Answer: When grown outdoors in warm climates, regular lemon trees grow 20 feet tall and take up to six years to bear fruit. 1 For indoor lemons, you need a tree that stays small and delivers lemons sooner.

It can take up to 6 years

Is natural selection changing the traits in a population of fish in Loberg Lake? How?

Answers

The greater the variety of traits that exist in a population, the greater the population's chance of survival. BUT natural selection about adapting to change.

How do plants photosynthesize in winter? When they shed their leaves.​

Answers

[tex]\Huge\green{\tt{✏Answer:}}[/tex]

Most trees do 'slow down' during winter, and deciduous trees that lose their leaves shut down photosynthesis entirely. Trees with needles (evergreen trees) that are retained over winter can actually photosynthesize during the winter.

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Egg of a bird represent an organ​

Answers

It is a false statement that the egg of a bird represent an organ​.

What is an organ?

An organ is composed of many tissues that work together for the same purpose. Tissues in turn are composed of cells.

The egg of a bed is only composed of cells that divide rapidly hence the egg of a bird is not an example of an organ and the statement is false.

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how can a rare trait be dominant

Answers

Answer:Just because a gene is dominant, and it takes just one translated allele for the trait to appear, doesn't necessarily mean that it's a physical trait that you'll see frequently in the population. Some dominant genes are rare, meaning that a small subset of humans have the dominant allele.

Explanation:

Dominant and Recessive Traits in Selected Domestic Animals. From: Genetics of Domestic Animals ... Species, Dominant Trait, Recessive Trait.

what is the relationship between allele frequency's and a gene pool.

Answers

Allele frequency refers to how common an allele is in a population. It is determined by counting how many times the allele appears in the population then dividing by the total number of copies of the gene. The gene pool of a population consists of all the copies of all the genes in that population.

Which of the following best describes why in general there are more hares in the ecosystem than foxes.

In 1945 there was a major event that caused the number of hares to dramatically increase. That is why there continues to be more hares than foxes here.

Hares are a lot smaller than the foxes, so more of them can fit into different niches. They can hide better in all of the bushes and behind rocks.

This is because if only 10% of the energy gets passed on to the next trophic level, then you need to have more lower level animals available to support the animals higher up the food chain. The fox must eat several hares to gain enough energy for growth and development

Answers

Answer:

C

Explanation:

The reason why there are more hares than foxes in the ecosystem is because if only 10% of the energy gets passed on to the next trophic level, then you need to have more lower level animals available to supports the animals higher up the food chain. The fox must eat several hares to gain enough energy for growth and development.

Answer:

C: This is because if only 10% of the energy gets passed on to the next trophic level, then you need to have more lower-level animals available to support the animals higher up the food chain. The fox must eat several hares to gain enough energy for growth and development

Explanation:

A scientist wants to test if soaking berries in hot water will prevent them from getting moldy. What is the independent variable? What is the dependent variable?
WILL GIVE BRAINLIEST

Answers

Hot water is independent variable whereas berries are dependent variable.

What is the independent variable and dependent variable?

The independent variable is hot water whereas the dependent variable is berries because berries shape depends on the hot water but the hot water can't be affected by the berries.

So we can conclude that hot water is independent variable whereas berries are dependent variable.

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Why does young children and elders need more protein

Answers

For muscle and bone strength

Compare between red blood cells and white blood cells
And write both

Answers

Answer:

The main difference between red blood cells and white blood cells is their function; red blood transport oxygen throughout the body while white blood cells are involved in the defense of the animals, destroying pathogens which invade the body cells.

Explanation:

2. List the gametes of a plant of genotype SSYy. need answer fast ​

Answers

Answer:

Ss, Yy, SY and sy

Explanation:

Which of the following structures of a virus is made up of protein?
O Capsid
O Tail
O Sheath
O Plug

Answers

Tail bc it’s the correct one

What are streptococci?
A. cocci that form a line
B. cocci that form clusters
C. cocci that form a ring

Answers

Answer: Streptococci are Gram-positive, nonmotile, nonsporeforming, catalase-negative cocci that occur in pairs or chains. Older cultures may lose their Gram-positive ...

‎Chapter 13streptococcus · ‎General Concepts · ‎Antibiotic Treatment

Explanation:

1. The ribosomes of which of these pairs of organisms would be expected to be most similar?


A.

Libytheinae and Charazinae


B.

Libytheinae and Calinaginae


C.

Satyrinae and Calinaginae


D.

Satyrinae and Charazinae



2.The data presented would best support the theory of evolution if which of the following were also true?


A.

The Nymphalidae are more advanced than other butterflies.


B.

The Nymphalidae have more mutations than other butterflies.


C.

The Nymphalidae share a common ancestor with other butterflies.


D.

The Nymphalidae live in different geographies from other butterflies.

Answers

In this case, the ribosomes organelles of Satyrinae and Charazinae are expected to be most similar.

What is evolution?

Evolution refers to the descendence with modification and therefore differences are lesser in close species.

According to the tree, the statement 'Nymphalidae share a common ancestor with other butterflies' best supports the theory of evolution.

In conclusion, in this case, the ribosomes organelles of Satyrinae and Charazinae are expected to be most similar.

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What is the molecule that DNA
wraps around to become
chromosomes?
A. histones
B. RNA
C. lipid

Answers

The answer choice is (A)
The answer is Histones (a)

Some jet airplanes fly in a layer of the atmosphere
where temperature generally increases with altitude
what is this layer of the atmosphere?

Answers

Answer:

the stratosphere

Explanation:

jet airplanes fly in a layer of the atmosphere close to earth namely  the stratosphere

Which of the following is a correct pair?​

Answers

Answer:

starch: polysaccharide is the answer

Explanation:

mark me a brainliest tysm

The light reactions of photosynthesis occur within the _____ of the chloroplast and the calvin cycle reactions occur within the _____ of the chloroplast.

Answers

The light reactions of photosynthesis occur within the Thylakoid membrane of the chloroplast and the calvin cycle reactions occur within the Stroma of the chloroplast.

What is the meaning of photosynthesis?

Photosynthesis is defined as a process in which solar energy is captured and organic molecules are produced. This process is fundamental to the survival of life on the planet and is the main way in which energy enters the biosphere.

In this case, looking at some parts that occur in the photosynthesis process, we have that the Thylakoid membrane of the chloroplast and the calvin cycle reactions occur within the Stroma of the chloroplast.

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You can separate a mixture of sand and copper(II) sulfate pentahydrate using filtration. What difference in properties enables the separation of the two solids by filtration

Answers

The property difference that enables this separation is: Difference in solubility


Meaning of Solubility

Solubility can be defined as the ability for a substance that is the solute to mix and form new substance with another substance which is the solvent

Solubility differences can be used to separate the two substances that is Sand and copper (II) sulfate. Because one is soluble in water whereas the other is not soluble in water.

In conclusion, The property difference that enables this separation is: Difference in solubility

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what happens when a cold front replaces a warm front

Answers

Answer: It creates what's called an occluded front.

Explanation: When a cold front overtakes a warm front, it creates what's called an occluded front that forces warm air above a frontal boundary of cooler air masses.

How does cpr differ in an unresponsive choking victim?.

Answers

With cpr you are trying to get someone’s heart pumping again, when someone is choking they just have something blocking their airways. So you dislodge the stuck item You would block through their mouth and try to send the air down their airways to block the item down.

For each offspring genotype in the
Punnett square you just completed, determine the phenotype. In other
words, what is the predicted fur color and eye color of the offspring? Using your Punnett square from the
last step, fill in the predicted fraction for each phenotype in the data table below.
Black Fur and Black Fur and White Fur and White Fur and
Black Eyes
Red Eyes
Black Eyes
Red Eyes
Predicted Fraction
V16
/16
V16
/16
RETR Y OS

Answers

The Punnett square is not found here but, according to data, these genetic traits involve the expression of two different genes (proportion 1/16 in double recessive).

What is a Punnett square?

A Punnett square is a diagram used in genetics to calculate the genotypic proportion from a given genetic cross.

Two different genes may generate 16 genetic (allelic) combinations in a Punnett square.

Moreover, fur color and eye color are phenotypic traits that depend on the recessive-dominance allele relationships received in offspring.

In conclusion, the Punnett square is not found here but, according to data, these genetic traits involve the expression of two different genes (proportion 1/16 in double recessive).

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Answer:

For each offspring genotype in the Punnett square you just completed, determine the phenotype. In other words, what is the predicted fur color and eye color of the offspring? Using your Punnett square from the last step, fill in the predicted fraction for each phenotype in the data table below.

Black Fur and Black Eyes Black Fur and Red Eyes White Fur and Black Eyes White Fur and Red Eyes

Predicted Fraction

1

⇒ 16/16

1

⇒ 0/16

1

⇒ 0/16

1

⇒ 0/16

Predicted Percentage

100

%

0

%

0

%

0

%

Finally, convert the predicted fractions into predicted percentages.

Explanation:

Which of the following has had the greatest economic consequences for agriculture in recent years? (4 points)
Irrigating land
Intense storms
Melting ice caps
Overfishing oceans

Answers

One of the greatest economic consequences of agriculture in recent years is overfishing.

Economic consequences of agriculture

Agricultural activities have led to overfishing.

Overfishing leads to a reduction in fish biodiversity and the loss of important species that could serve as food, drugs, or industrial materials for the use of man or his livestock.

Overfishing means that there will not be enough fish for humans in the nearest future. This may result in a malnourished human population.

Overfishing can also cause ecological problems such as disruption to food chains.

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Using the Sanger method for sequencing, ______synthesis stops when ________ is reached. Group of answer choices RNA; a deoxyribose base RNA; any primer that begins with a purine base

Answers

Using the Sanger method for sequencing, DNA stops when a dideoxyribose base is reached.

What is Sanger sequencing?

Sanger sequencing was the first method developed in molecular biology laboratories for nucleotide sequencing.

Thus method (Sanger sequencing) is based on the use of nucleotide analogs that stop addition in the DNA strand.

In conclusion, using the Sanger method for sequencing, DNA stops when a dideoxyribose base is reached.

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Life sciences about gaseous exchange please help.​

Answers

Gaseous exchange is fundamental in aerobic organisms because oxygen is required to carry out cellular respiration.

What is cellular respiration?

Cellular respiration is a series of chemical reactions by which aerobic organisms interchange oxygen and carbon dioxide with their surrounding environment.

During cellular respiration, oxygen is consumed to generate ATP and carbon dioxide is released.

In conclusion, gaseous exchange is fundamental in aerobic organisms because oxygen is required to carry out cellular respiration.

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what is the answer to this question i need help

Answers

Answer:

B. where ribosome assembly begins

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Match the given scenarios to the different phases in business cycle.-Onyx Corp. has decidedto make long terminvestments-The economy of the countryhas recorded its highestemployment rate-Jewel Inc. has decidedto lay off some of itsemployees-Jones family's purchasingpower is higher than ever-Onyx Corp. is hiringworkers for its factory-Jewels Inc.'s saleshave dippedexpansion phase peak phaserecession phase in a particular variety of corn, kernel corn is controlled by a single gene with two alleles. the dominant allele results in purple kernels, and the recessive allele results in yellow kernels. a single corncob may contain hundreds of individual kernels, each of which is the result of a separate fertilization event. what would the frequency of yellow kernels be that result from a cross between two heterozygous plants? 25% 0% 75% 50% PLEASE ILL GIVE 25 POINTS ANS MARK BRAINIEST IF SOMEONE GIVES ME THE RIGHT ANSWER PLEASE PLEASE PLWASE If light with a wavelength of 515 nm is shown on a metal surface, and photoelectrons (electrons ejected from the surface) have a kinetic energy of 86.2 kJ/mol, what is the binding energy of the electrons (also known as the work function of the surface)? Fill in the blank.5 5/2 = __ x 1/6 Please help me solve this composite shape step by step Write an equation that represents the line. The four leaders (octavius, antony, brutus, cassius) meet on the battlefield before the fighting begins. what, do you suppose, is the dramatic purpose of that meeting a6(3+2d) = 54I need that answer Is the sentence below literal or nonliteral?Iva's town in Florida had not received snow in over ten years.literalnonliteral Which material is a part of bedrock? siltplantswoodwater Consider a perfectly competitive market with market supply q^s = - 2 +p and the market demand q^d = 30 - p suppose the government imposes an excise tax of $4 per unit on this market. what are the net benefits from this tax? Please Help I Don't Understand! Find the value of x. Round to the nearest tenth. B 18 19 A 22 C x = [? ] X X Law of Sines: sin A a sin B b = sin C C the diagram shows a right angled triangle . what controls the volumes of water in each cylinder once equilibrium is established? 100 POINTS PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!In The Old Man and the Sea, Santiago is ostracized by people in his village because he hasnt caught a fish in eighty-four days.Which details from the story support this?Select each correct answer."Many fishermen were around the skiff looking at what was lashed beside it and one was in the watermeasuring the skeleton with a length of line.""'I know you did not leave me because you doubted.' 'It was papa made me leave. I am a boy and I must obey him.'""They sat on the Terrace and many of the fishermen made fun of the old man and he was not angry.""He was too simple to wonder when he had attained humility. But he knew he had attained it and he knew it was not disgraceful and it carried no loss of true pride.""But after forty days without a fish the boys parents had told him that the old man was now definitely and finally salao, which is the worst form of unlucky" choose the symbol for the line XY. Please Help! The value of m is: When revising an essay, how can a writer best connect ideas more clearly? by using transitions to create logical relationships among the claim, reasons, and evidenceby removing logical fallacies that may be causing reasons and evidence to be compromisedby summarizing the overall argument in a conclusion that succinctly restates the main points by crafting a call to action that encourages readers to link the ideas in the essay to the real world