Answer:
1. Choroid Plexuses
2. Ventricles
3. third
4. Cerebral Aqueduct
5. Central Canal
6. Subarachnoid space
7. Forth Ventricle
8. Hydrocephalus
Explanation:
Cerebrospinal fluid formed by capillary knots called Choroid Plexuses which is hanged inside ventricles. There are four ventricles in which CFS flows from lateral to third and from cerebral aqueduct to forth ventricle. The meninges covers spinal cord which extends more inferiority to form a sac from which cerebrospinal fluid can be withdrawn without damage to spinal chord.
Prompt
There are multiple lines of evidence that provide support for common ancestry and evolution. Write 3-4 paragraphs
describing at least three of them in detail. Provide at least one example for each line of evidence.
<< Read Less
Answer:
Here's a better answer.There are multiple lines of evidence that provide support for common ancestry and evolution; this would be homologous features of anatomy and embryology and fossil records.
In comparative anatomy, there are many similarities between species because all life is related. Homology is similarities seen because of the ancestry of features or genes in an organism. Similarities can show descent from common ancestors and similarities can be seen in body structures, development, and DNA. Homologous structures are similar traits found in two different species that are the result of having a common ancestor. These structures are similar but may have different functions. An example of this might be the homologous structures in the limbs of humans, cats, whales, and birds. And then there are analogous structures, which similarly is that the structure of different species are similar because the trait is advantageous, not because they are related. An example of this is sharks and dolphins having similar fins. Along with anatomy is Embryology. Different species can have similar embryos because they come from a common ancestor. They may start with the same developmental plan but change drastically as they grow up. An example of this is seen in the early stages of development between fish and chicken embryos.
Next up, the fossil record provides evidence that supports common ancestry and evolution. The fossil record provides us with visual evidence for evolution. The fossil record directly allows us to pinpoint if there are any similar structures amongst organisms and see if there are any vestigial structures from ancestors that remain in organisms that still roam today. The fossil record depicts evolutionary change over the past four billion years, which can be seen through transitional forms, increasing complexity of life, and geographical distribution. Transitional forms are fossils that show intermediate states between an ancestral species and its evolutionary descendants. Increasing complexity is seen as life on earth becomes more complex. That and geographic distribution which has been studied closely and found that the continents have moved over time and that the fossil record reflects this movement. Fossils of different animals can be found on different continents around the world due to continental drift.
Explanation:
The various pieces of evidence that support common ancestry are homologous organs, fossil records and embryological studies.
What is common ancestry?The phrase "common descent" in evolutionary biology refers to a particular group of species' shared ancestry. The creation of new species from an original population is a component of common descent. Two creatures are considered to be closely related if they have a recent common ancestor.
In contrast, molecular genetic techniques can also be used to establish shared ancestry from a single universal ancestor of all living things. Natural selection and other factors, such geographic isolation, are considered to have contributed to many speciation episodes during this development from a universal common ancestor.
According to the common ancestry idea, every living thing descended from a single progenitor. Hence, the Theory of Common Descent contributes to our understanding of why traits in species living in different geographic regions vary, why some traits are highly conserved across broad animal classifications (such as vertebrates or tetrapods), why seemingly unrelated species (such as birds and reptiles) share hereditary physical and genetic traits, and why successfully adapted organisms typically have more offspring.
Therefore, embryological studies, fossil studies and homologous organs can help in the study of common ancestry.
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Some of the typical properties of cancer cells are: (1) Self-sufficient growth and proliferation, (2) Defects in intracellular control mechanisms that normally arrest or permanently stop cell division in response to stress or DNA damage, (3) Ability to escape from home tissues (invasiveness) and to survive and proliferate in foreign sites (metastatic ability), and (4) Instability of the genome. True or False
Answer:
True
Explanation:
Cancer cells are abnormal cells that divide aggressively to form solid tumors, thereby differing from normal cells. Cancer cells do not need any stimulation to multiply them, i.e., they can synthesize their own growth factors that trigger uncontrolled cell proliferation. Mutations in genes associated with the progression through the cell cycle and programmed cell death (i.e., apoptosis) are a well-known hallmark of cancer cells. The mutated genes can be either 1-tumor suppressor genes that slow down cell division and repair DNA mistakes or 2-proto-oncogenes that normally help cells grow, and whose mutations cause normal cells to become cancerous (oncogenes are mutated forms of proto-oncogenes). Cancer cells are characterized by their invasiveness and metastatic potential, i.e., their ability to spread to healthy surrounding tissues through the lymph system and/or bloodstream, where these cells proliferate and produce new tumors. Finally, genomic instability, i.e., the increased susceptibility of cells to acquire and spread mutations at the genome level, is also a hallmark of cancer cells. Genomic instability results from damage to genes that regulate cell division and tumor suppressor genes.
Blood pH is sensed by cells known as chemoreceptors that send information about blood pH to the brain via cranial nerve 9 and 10. In order to correct changes in pH, the ventral respiratory group sends signals to the diaphragm to adjust its rate of contraction. These signals are sent via the phrenic nerve. What serves as the effector in this example
Answer:
The correct answer is - The diaphragm.
Explanation:
If there is a response to stimulation if a bodily tissue or organ becomes active and those of the autonomic system involves two neurons, not single neurons like motor pathways of the somatic nervous system.
In this case, the diaphragm is the organ that gets the signal in order to correct or adjust the rate of contraction in response to changes in pH level, Hence, the diaphragm is the organ that is the effector in this case.
A sample of gold has a mass of 38,6 grams and a volume of 2 cm What is the density of gold?
Many animals have a mutually-beneficial, symbiotic relationship with bacteria that reside in their guts. To study the effects of these relationships in more detail, research organisms such as fish and mice have been raised under germ-free conditions. What important process do you predict is compromised in germ-free mice
Answer:
Explanation:
Quá trình tiêu hoá và hấp thụ chất dinh dưỡng
List any ten environmental issues of Nepal and write short Introduction about them
Answer:
Major issue
Air pollution. The death rate from both indoor and outdoor air pollutants was 133.3 per 100,000 populations(2017) which is the second-highest death rate after due to Cardiovascular diseases in Nepal. ...
Unsafe water. ...
Unsafe hygiene. ...
Water and air pollution. ...
Deforestation. ...
Overpopulation.
Which of the following describe proteins? Check
all that apply.
O a large class of molecules made up of sugars
a type of molecule that can initiate or assist
other processes in the body
O a large class of molecules made up of amino
acids
O a molecule that stores the information for the
creation and functioning of cells
Answer:
a large class of molecules made of amino acids...since amino acids are the smallest particles that make up proteins.
I hope this helps
Answer: For the multiple choice the answers are B and C
Explanation: Just had this question in class
Explain how the structure of a red blood cell is related to its function
Answer:
It doesnot have a nucleus to increase the surface area
Explanation:
Red blood cells carry oxygen from our lungs to the rest of our bodies .Then they make the return trip, taking carbon dioxide back to our lungs to be exhaled.
Answer:
it has no nucleus which creates more room for the transport of oxygen,it also has a biconcave shape..they are flat and also flexible.
I hope this helps
The DNA sequence ATC AGC GCT GGC CCG is part of a gene.
How many proteins are coded for by this message?
15
1
4
5
Answer:
There are 5 proteins coded for by this message.
Explanation:
For every 3 bases, a protein is coded.
How would the absence of gravity affect the formation of planets
Answer:
The rocks and debris would never accrete into a planet.
Explanation:
Gravity is an attraction force and dependents on the mass of the objects but in the absence of the force, the rocks and debris would not come together to form a clump. So, we can say that in the absence of gravity, the rock and debris would never accrete into a planet. So, we can say that in the absence of gravity, the rock and debris would never accrete into a planet.
Answer:
Gravity is an attraction force and dependents on the mass of the objects but in the absence of the force the rocks and debris would not come together to form a clump. So, we can say that in the absence of gravity, the rock and debris would never accrete into a planet.
As an adaptive immune response progresses, the production of variant antibodies that compete more effectively for antigen occurs, and B cells producing these antibodies are preferentially selected on the basis of their improved binding to antigen. This phenomenon is referred to as _______.
Answer:
a
Explanation:
sler Test
Select the correct location on the image.
Identify the position on the graph that gives the carrying capacity of the population.
population
y 1
2,000
1,500
Population Size
1,000
500
0
6
24
12 18
Time (months)
Reset
Next
First, there is a need to understand what the carrying capacity is as it relates to the environment:
Carrying capacity refers to the maximum number of individuals of a particular species that and environment can support based on the resources it has. The population of a species in an environment grows and oscillates around the carrying capacity of the environment.Now let us look at the graph. The population size grew from 0 and then leveled off at 2,000 with time. The leveling-off also happened without any oscillation, meaning that the maximum population size the environment can support is 2,000.
Hence, the portion on the graph that indicates the carrying capacity would be the plot where the population size is 2,000 and the time being between 12 and 18. This has been circled and labeled as 'K' in the attached image.
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Answer:
2,000
Explanation:
Right on Plato ;)
A nonnative species of plant is introduced into a forest. Which of the
following would be most likely to prevent this plant from becoming an
invasive species?
O A. The plant is able to reproduce quickly in this ecosystem.
OB. The forest ecosystem lacks animals that eat the plant.
O C. The forest ecosystem has very low biodiversity.
O D. The plant must compete with tough native species.
Answer:
D- the plant must compete with tough native species
Explanation:
if the plant has to compete with tougher native species ots probably less likely to grow quickly and take over
Which of the following statements about active transport is true?
Molecules move down the concentration gradient.
ATP is not required to move molecules through the membrane.
ATP is formed as molecules pass through protein channels.
It results in a higher concentration of molecules on one side of the membrane.
Answer:
It results in a higher concentration of molecules on one side of the membrane.
Explanation:
Active transport is the transport of molecules up the concentration gradient. This means that molecules are going from low density to high density. This is the opposite of natural diffusion. So, it requires ATP to move the molecules this way. Diffusion normally occurs to maintain homeostasis and an equal amount of concentration on both sides of a membrane. But, with active transport, since molecules are moving up the gradient, the opposite happens and the concentrations are unequal.
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[tex] \hookrightarrow\large\sf \: Pepsin \: is \: an \: example \: of \: \boxed{\underline{\bf \: protease.}}[/tex]
help is needed please!!
Answer:
| and ||
Explanation:
I haven't heard of heavy metal exposure causing nervous system damage, but I have heard that when you inhale during mining, you are inhaling all different particles and dust which causes other respiratory diseases, such as chronic obstructive pulmonary disease. Noise pollution is definitely true as people have lost their hearing from all the noise underground which also caused headaches. This is my opinion, sorry that I'm late!
Which of the following statements is correct with respect to the photosynthetic pathway of grass or a cactus?
Answer:
Where are statement
Explanation:
Please tell
Which actions could be categorized in the “aerobic” section of the Venn diagram?
Check all that apply.
consists of three stages
yields 36 ATP molecules
does not require oxygen
produces lactic acid
starts process with a glucose molecule
Identify the stage of cellular respiration in which each of the following takes place.
Produces 32 ATP molecules
Creates four ATP molecules, but then gains overall only two
Gives off carbon dioxide
Gives off water
Produces two ATP molecules
Answer:
start process with gulcose
Explanation:
simple
A tech is using the H (flagellar) antigen to serotype a suspected Salmonella species. The results of the serotyping are agglutination with one well that indicates a group of possible serotypes, not one particular serotype. Quality control passed. Why did this occur
Some Salmonella H antigens can occur in multiple strains and serotypes
An antigen (Ag) is any molecule/structure such as, for example, a molecule present on the surface of a pathogenic microorganism, that can be bound by a specific antibody and/or B-cell receptor. The Kauffmann–White classification scheme is a system that was adopted for use in 1934 in order to categorize different serotypes of the bacterial genus Salmonella, based on their somatic-surface antigens. The system is a practical (diagnostic) method based on the variation in the somatic (O) and flagellar (H) antigens present in the cell wall of Salmonella species. In this classification system, 'O' antigens are determined based on oligosaccharides which are associated with lipopolysaccharide, while the "H" antigens are distinguished by the protein content of the Salmonella flagella.Learn more about this topic here:
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All of the following statements are true concerning skeletal muscles EXCEPT: A. Skeletal muscles control involuntary body functions. B. Skeletal muscles are controlled by the central nervous system. C. Skeletal muscles are used to move large body parts. D. Skeletal muscles are attached to the bones. Please select the best answer from the choices provided. A B C D
Answer:
A. Skeletal muscles control involuntary body functions.
Explanation:
Skeletal muscle is also known as voluntary muscle and it can be defined as a type of muscle connected with the skeleton by tendons, so as to form a mechanical system that enables the movement of the limbs and other body parts with respect to another.
Generally, skeletal muscles are only found in vertebrates.
Skeletal muscles doesn't control involuntary body functions, instead it controls voluntary body functions such as the movement of body parts.
In conclusion, an example of a muscle responsible for controlling involuntary body functions is cardiac muscle.
Answer: the answer is a
Explanation:
The top one is correcto
The meaning of the term ionic bond
Answer:
A type of Chemical Bonding that includes electrostatic attraction between opposite ions.
Explanation:
Ionic bonds are the attraction of two opposite ions.
An ion is an atom that has a net electric charge.
Modern plant-breeding techniques (artificial selection in action) have reduced genetic variability in many of our most commercially valuable plants. To most people, that would generate a shrug. However, a biology student that has studied evolution understands the problem with this. Briefly explain why there is an issue with this.
Answer:
There is an issue with the artificial selection.
Explanation:
There is an issue with this artificial selection because the genetic variability is reduced when we do again and again the artificial selection. In the artificial selection, the selected genes are combined with the one another and does not allow natural fusion or combination of genes that is responsible for the genetic variability in the organisms so that's why we can say that this artificial selection is an issue that reduce genetic variability.
What is the end product of glycolysis ?
Answer:
pyruvate
Explanation:
Explanation:
The final product of glycolysis is pyruvate in aerobic settings and lactate in anaerobic conditions. Pyruvate enters the Krebs cycle for further energy production.
There are a few points in the human genome where each individual differs. What is the name of those points?
Explanation:
Every human genome is different because of mutations—"mistakes" that occur occasionally in a DNA sequence. When a cell divides in two, it makes a copy of its genome, then parcels out one copy to each of the two new cells. ... These genome variations are uniquely yours.The point at which every individual differs is called the DNA which is unique to each individual.
What is DNA?The term DNA has to do with the genetic material that is found in the genes. It is an acronym that means deoxyribonucleic acid. It is peculiar to each individual.
Hence, the point at which every individual differs is called the DNA which is unique to each individual.
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During a stay in the hospital, an accident victim develops symptoms of bacteremia. A blood sample shows the presence of Gram-positive cocci in pairs. Lab tests determine that the bacteria are non-hemolytic and bile salt tolerant. The bacteremia is likely due to
Answer:
Enterococcus.
Explanation:
Enterococcus is reason for nosocomial infection with predilection for older patients with multiple comorbidities. It is usually caused by longer stay in hospital. The infections may include urinary tract infections, wound infection and intra abdomen or pelvic infections.
Experiment 1:
A student tested to see if ultraviolet light made plants grow
more slowly. She followed a logical method and used
control and experimental groups. She repeated her
experiment several times, and each time found that plants
grow slightly slower with ultraviolet light.
Experiment 2:
A student tested to see if a new fertilizer made roses
bloom earlier. She used a logical method and control and
experimental groups. She performed one experiment and
found that the fertilizer had no effect.
Which experiment most likely has greater reliability, and why?
thank
Answer:
Experiment 1
Explanation:
This is because she repeated her experiment several times and not just one time.
How can evidence from an experiment be explained in relationship to the hypothesis?
• as a prediction
• as a question
• as an inference
• as a conclusion
Answer:
As a conclusion
Explanation:
A hypothesis is a tentative statement about the relationship between two or more variables. It is a specific, testable prediction about what you expect to happen in a study. A hypothesis is a prediction based on the theory being tested. The evidence can support the Hypothesis or invalidate the Hypothesis.
Answer:
A conclusion
Explanation:
It sums up everything that you did
Which of the following is a start codon?
A.UAG
B.AUG
C.UAA
D.UGA
Answer:
AUG
Explanation:
you can use a codon chart to help or double check.
B) you can use a software to check
which gases does NOT contribute to greenhouse effect?
Answer:
Carbon monoxide is not a primary greenhouse gas. It contributes in a relatively small way directly to the greenhouse effect.Which of the following statements is TRUE?
A.Introns are the parts of mRNA that are translated into protein.
B.Introns do not have any specific function,
C.Human genes have fewer introns than genes of other organisms.
D.Introns are not excised during post transcriptional modification
Answer:
A. introns are the parts of mRNA that are translated into protein.
Explanation:
i hope it helps you
The DNA stands for deoxyribose nucleic acid, it has all the information required for the proper functioning of the human body.
The correct answer is B
The process of the formation of protein from the mRNA is called translation. it requires:-
RibosometRNAmRNAThe mRNA has the introns and the exons in it. Exons are the coding part of the DNA while the introns are the non-coding part and it does not have any specific functions.
Hence, the correct option is B that is Introns do not have any specific function.
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