Which cells are most directly associated with the formation of csf?.
Answer:
. Ependymal cell
Explanation:
Most neurons are surrounded by glial, which are the supportive cells of the nervous system and are ten times more numerous than neurons. Overall, the most well known role for neuroglia is to provide structure to the delicate nervous tissue. They fill the space between neurons, serving as mortar and thus help hold nervous tissue together.
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Answer:
C
Explanation:
This answer represents evolution as a whole not the process
Which biomolecule contains both nitrogen and phosphate?.
Answer:
The answer would be nucleic acids
Explanation:
The chemical composition of nucleic acid is:
A sugar molecule is attached to a nitrogen base and phosphate group.
the relationship between the frog and the snake may be described as...
Answer:
Hello there! The relationship between a frog and a snake is a predator and prey. prey being the frog and predator being the snake.
Scientists have found ash in certain layers of sediment in an area in northern China. This is evidence that a volcano erupted in the area in the past. In the same sedimentary layers, fossils of dinosaurs, birds, and early mammals have been found. How can scientists best determine when the volcano erupted?
Scientists can find out when the volcano erupted by determining the age of the fossils in the ashy layers of sediment in area.
What is a Volcano?This is defined as a vent or opening where lava erupts on to the surface of the Earth.
The age of the fossils in the ashy layers of sediment in area will help to determine the time when the volcano erupted.
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identify the process shown in
the diagram to the right
A synapse is the specific location where ____________ is functionally connected to either another neuron or ____________ . There are two types of synapses in the human body: chemical synapses and electrical synapses. Most synapses within the nervous system are ____________ synapses.
Synapse is the connection stablished between neurons or between neurons and effector cells. a) a neuron b) effector organ c) chemical.
What is a synapse?
Neurons transmit nervous impulses.
Every neuron forms connections with other neurons or with effector organs, such as the muscle. These connections are known as synapses.
Synapses can be either chemical or electrical. The most common one is the chemical synapses that involve the release of a substance known as a neurotransmitter.
During chemical synapses, when a presynaptic neuron sends information, it releases neurotransmitters. This event is done through exocytosis.
The neurotransmitter is a molecule that travels through the synaptic space forward to the other neuron or effector cell. Once the chemical reaches the postsynaptic membrane, it binds to its receptors.
This binding neurotransmitter-receptor produces excitatory postsynaptic potential, which is the depolarization of the postsynaptic cell.
Once the action potential is initiated, it spreads to the rest of the membrane, depolarizing it.
A synapse is the specific location where _a neuron_ is functionally connected to either another neuron or _an effector cell (i.e. muscle)_ . There are two types of synapses in the human body: chemical synapses and electrical synapses. Most synapses within the nervous system are __chemical__ synapses.
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The diagram shows some of the energy inputs and outputs for a farm animal. How much of the energy in the cow's food was transferred into food for humans?
All cytoskeletal filaments are held together via weak noncovalent interactions, so that assembly and disassembly can occur rapidly Question 1 options: True False
All cytoskeletal filaments are held together via weak noncovalent interactions, so that assembly and disassembly can occur rapidly is True.
Does the cytoskeleton assemble and disassemble?The actin cytoskeleton is constantly assembling and disassembling. Cells harness the energy of these turnover dynamics to drive cell motility and organize cytoplasm.
Although much is known about how cells control actin polymerization, we do not understand how actin filaments depolymerize inside cells.
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Interferon is a group of proteins produced by cells in response to the presence of Group of answer choices viruses. chemical irritants. bacterial cells. malarial parasites.
Interferon is a group of proteins produced by cells in response to the presence of viruses.
What is an interferon?Interferon is a type of signalling protein that is released by the immune cells of a human body which is as a result of a response to an invading viral pathogen.
These proteins are called interferon because they interfer with the activities of viruses and prevents them from multiplying.
There are two type of interferon which are secreted by different cells they include:
Type I interferon: They are secreted by virus-infected cells.Type II interferon: They are secreted by T cells, natural killer (NK) cells and macrophages.Therefore, Interferon is a group of proteins produced by cells in response to the presence of viruses.
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Cilia are similar in structure to flagella and are commonly found on which microbial cells?.
Answer:
I think the answer will be protozoa. Cilia are similar in structure to flagella and are commonly found on protozoa.
Hope this helps!!
Which relationship represents an example of mutualism?
Answer:
You are correct :)
Explanation:
The first confirmed detections of extrasolar planets occurred in ____________.
Answer:
9 January, 1992
Explanation:
The first confirmed detection of extrasolar planet (or) exoplanet occurred in the year 1992.
which of the following statement is true
a. friction makes an object slides
b. gravity pushes an object upward
c. force is needed to stop object
d. an object in motion will remain in motion.
The correct statement among the given answers is letter d. an object in motion will remain in motion.
WHY?In reality, object that is in motion (like a ball) will remain in motion unless it's stopped by something (a wall or any force).
This is stated in the first law of motion by Sir Isaac Newton -- an object in motion will remain in motion unless an outside force acted upon the object.
The genome of a virus is contained in the virus core which is made up of.
Answer:
genome includes both the genes and the noncoding DNA, as well as mitochondrial DNA and chloroplast DNA.
Explanation:
A genome is all of an organism's genetic information, according to molecular biology and genetics. It is made up of DNA nucleotide sequences. Genes and noncoding DNA, as well as mitochondrial DNA and chloroplast DNA, are all part of the genome. Genomic science is the study of the genome.
What is the US Census Bureau requirement for a place to be classified as urban?
A: no less than 1 million people
B: any population over 100,000 people
C: a population of 10,000 or more
D: at least 1,000 people per square mile
Answer:
at least 1,000 people per square mile
Explanation:
I took the test it was correct. ( i know thats not an explanation im sorry but its correct).
Are whales more closely related to fish or to elephants?
List 3 reasons
Which type of cells are lymphocytes?
(1 Point)
Mast cells
O T-cells and B-cells
O Nerve cells
O Red blood cells
Answer:
Red blood cells
Explanation:
Question 1 of 10
Which of the following is an example of ecological restoration?
A. Protecting a natural area before it becomes degraded by human
activity
O B. Converting a sanitary landfill into a park used for recreational
sports
a
O C. Diverting a river back to its natural course to reestablish a coastal
wetland area
D. Developing an area of land into a botanical garden that protects
rare species
Answer:
C - Diverting a river back to its natural course to reestablish a coastal wetland area.
Explanation:
Just took the quiz.
Variation in offspring is important in maintaining genetic diversity within a population. Which of the answer choices indicates a mechanism of introducing genetic variation in a population? Select all that apply.
A) crossing over during meiosis
B) fertilization of an egg by a sperm
C) independent assortment during meiosis
D) mitosis producing two new daughter cells
E) binary fission resulting in two bacterial daughter cells
Answer:
The answer would be A, B, and C.
Explanation:
Since genes shuffle and assort randomly in meiosis, this is a cellular process that results in greater genetic diversity. Because haploid gametes form a diploid zygote in fertilization, this also increases genetic variation. However, binary fission and mitosis only result in daughter cells that are clones of the parent cell.
Mechanisms that regulate smooth muscle contraction (independently of nerves or hormones) by which organs and tissues alter their own arteriolar resistances and blood flow are referred to as ______.
Mechanisms that regulate smooth muscle contraction (independently of nerves or hormones) by which organs and tissues alter their own arteriolar resistances and blood flow are referred to as : Myosin and actin
Meaning of Myosin and actin
Myosin and actin are proteins that are found in all type of muscle tissue.
Smooth muscles (Heart) do not need nerves but it is an involuntary action, due to the presence of the myosin and actin, it work continuously.
Myosin and Actin are like a sliding filament in the muscle structure of the heart. they cause the heart to work continuously.
in conclusion, the Mechanisms that regulate smooth muscle contraction (independently of nerves or hormones) by which organs and tissues alter their own arteriolar resistances and blood flow are referred to as : Myosin and actin
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The project that sequenced and mapped all of the genes in the human body is known as _____.
Answer:
The answer is Human Genome Project
Explanation:
The project that sequenced and mapped all of the genes in the human body is known as Human Genome Project .
What is the defining criterion for determining a human male?
Select one:
a Y-chromosomes
an X-chromosome
a male reproductive organ
ability to grow a beard
Answer:
A Y-chromosome
Explanation:
Males have one X and one Y chromosome
Earth is not filled to the brim with elephants, or ants, or ferns, or geckos. What prevents a population from growing forever? many different factors limit population growth. Some of these factors are density-dependent, and others are density-independent. Drag a label under each graph to indicate whether it shows density-dependent population regulation or density-independent population regulation. Labels may be used once, more than once, or not at all.
Factors preventing growth include density-dependent birth rate, density-dependent death rate, density-dependent birth rate, and density-independent death rate.
Whare are limiting factors?Limiting factors are different environmental conditions that prevent population growth in the ecosystem.
Density-dependent birth rate factors include ecologic relationships such as competition, predation and diseases.
Density-independent factors include both birth rate and death rate that affect size in a particular population.
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The illustration below shows the wing structure of an insect. Line-drawing of insect wing, showing outline of wing and pattern of veins. The wing is narrow where it attaches to the body, gets wider, then gets narrow again, and has a rounded tip. Which of the following animals will most likely have a wing structure that is very similar to this insect’s wing structure?
A. An animal from the same class
B. An animal from the same genus
C. An animal from the same phylum
D. An animal from the same kingdom
An animal from the same class as the insect will most likely have a wing structure that is very similar to the insect's wing structure. Therefore, the correct statement is option A.
What are insect's wings consisting of?The class here is Insecta, which includes all insects. Insects are a diverse group of organisms having unique features, including wings. Insect wings consists of a thin, membranous layer supported by a network of veins.
The veins provide structure and strength to the wing and is a characteristic of the class Insecta. However, there is a large variation in insect wings, shapes, sizes, and patterns of veins, the basic structure is the same.
Insect wings are narrow where they attach to the body, get wider toward the middle of the wing, and then get narrow again at the tip, often with a rounded or pointed shape. This general shape and vein pattern is common to all insects with wings.
Therefore, the insects, which belong to the same class Insecta, will have similar wing structures to the insect in the illustration.
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Convergent evolution is when a species evolved from a common ancestor.
True
False
Answer:
False
Explanation:
Convergent evolution is when two species with different ancestors evolve to have similar traits to do similar purposes. Ex: the structure of the arm of differnet mamals. They all do the same thing, and the general make up is the same, but mammals are in no way the same species.
Divergent evolution is the type of evolution that comes from species of the same ancestor, but thats when they evolve differently despite having the same ancestor to adapt to their enviroment (ex: bird beaks).
1 question: What means to divide a material into its various parts.?
2 question: The name given to matter that can be touched and manipulated is a what.?
3 question: Matter may exist is many what such a solid, liquid or gas.? help me asap
Answer:
1. analyze, dissect, break down mean to divide a complex whole into its parts or elements.
2. Substance
3. Matter exists in all of these forms (solid, liquid, gas) for example, water exists as ice, liquid water, and gaseous steam.
Explanation:
I hope that this helped!!
I'm sorry if any of it is not what you're looking for.
Dawnin developed four theories of evolution, which of the following is NOT one of his theories?
A. Living organisms evolve over time.
B. Natural Selection is the main cause of evolutionary change.
C. Evolutionary change occurs quickly, and is caused by large mutations.
D. The splitting of lineages into two or more species has occurred.
Dawnin developed four theories of evolution and not one of his theories that evolutionary change occurs rapidly and is caused by large mutations.
What are Charles Darwin's theories?Charles Darwin was a British naturalist who proposed the theory of biological evolution by natural selection. Darwin defined evolution as "descending with modification", the idea that species change over time, give rise to new species and share a common ancestor.
With this information, we can conclude that Dawnin developed four theories of evolution and not one of his theories that evolutionary change occurs rapidly and is caused by large mutations.
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Cortisone and cortisol are types of ________ produced by the middle cortical layer of the adrenal gland.
Answer:
glucocorticoids
Explanation:
If brown bears did not change the composition of their cell membranes during winter months, what would be the effect on the fluidity of their cell membranes
Answer:
I have no idea good point
Explanation: