Which of the following structures is not present in some chordates?
A a tail
B a backbone
C a notochord
D a hollow nerve cord
Answers
Related Questions
The vital centers for the control of heart rate, respiration, and blood pressure are located in the a. pons b. medulla c. midbrain d. cerebrum e. none of the these
Answers
Brain stem is the part of the human brain that houses the most primitive functions such as the control of heart rate, respiration, and blood pressure.
What is brain stem?It is a part of the brain that is located between the rest of the brain and the spinal cord.
It is responsible for carrying out the most basic nervous system tasks for our survival, such as the regulation and maintenance of the heart rate and the automatic control of respiration.
Therefore, we can conclude that the brain stem is the part of the human brain that houses the most primitive functions such as the control of heart rate, respiration, and blood pressure.
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What is the name of the structures that
are built to recognize specific invaders
and trigger an immune response?
A. antibodies
B. antigens
C. macrophages
Answers
Answer:
C
Explanation:
Macrophages is a type of white blood cell. This basically finds out if there is an invader, and stimulates an immune response. Note that, this is not the only function of this structure.
The structures that are built to identify and recognize specific foreign agents and activate the immune system are antibodies, Therefore, option A is correct.
What are antibodies?Antibodies, also known as immunoglobulins, are Y-shaped proteins that are produced by B cells in response to the presence of specific antigens in the body, such as viruses, bacteria, or other foreign substances.
Each antibody molecule is composed of four protein chains, two identical heavy chains, and two identical light chains, that are joined by disulfide bonds. Antibodies are a key component of the adaptive immune system, which is responsible for recognizing and eliminating specific invaders.
Antibodies play a critical role in protecting the body against infections, as well as in the development of vaccines and other immunotherapies. Therefore, option A is correct.
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Why was water present as vapour and not liquid?
A: Lower pressure
B: the earth was much hotter than today
C: nobody knows
D: a complex response to the prevailing winds at the time
Answers
Which part of a cell will identify it as prokaryotic or eukaryotic?.
Answers
Comparing prokaryotes and eukaryotes:
The primary distinction between these two types of organisms is that eukaryotic cells have a membrane-bound nucleus and prokaryotic cells do not. which is where the nucleus eukaryotes store their genetic information.
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Which statement is true of meiosis ?
A. Organisms use meiosis to grow
B. Organisms use meiosis to replace blood cells
C. Organisms use meiosis to repair damaged cells
D. Organisms use meiosis to make reproductive cells
Answers
What would occur if the anthers were removed from a flower?.
Answers
Answer:
The flower would not be able to pollinate by itself.
Explanation:
The function of the anther is to produce pollen
conifer trees dominate boreal forests rather than tundra because of
Answers
The science of naming and grouping organisms is called (genealogy / numismatics / systematics / speciation), and the term (families / taxa / kingdoms / species) describes any of the groups of organisms.
Answers
Answer:
The science of naming and grouping organisms is called systematics and the term taxa describes any of the groups of organisms.
Explanation:
Genealogy is the study of families, family history, and the tracing of their lineages. Genealogists use oral interviews, historical records, genetic analysis, and other records to obtain information about a family and to demonstrate kinship and pedigrees of its members.
Numismatics is the study of the physical embodiment of various payment media (i.e. currencies). The study of numismatics as it applies to coins is often in the research of the production and use of the coins to determine their rarity.
Systematics, or Taxonomy, is the study of the kinds of organisms of the past and living today, and of the relationships among these organisms. Systematists collect and study the variety of plants and animals and group them according to patterns of variation.
Speciation is an evolutionary process by which a new species comes into being. A species is a group of organisms that can reproduce with one another to produce fertile offspring and is reproductively isolated from other organisms.
taxon - taxa: a taxonomic group of any rank, such as a species, family, or class.
How long does it take for a plastic fork to decompose.
Answers
Answer:
1,000 years
Explanation:
Single-use utensils can take up at least 1,000 years to decompose.
Answer:
It would take 1000 years
five ways water is important to you in your daily life.
Answers
Answer:
bathing,cooking,washing clothes , cleaning, drinking
Explanation:
ddATP, ddTTP, ddCTP, and ddGTP are labeled with red, green, yellow, and blue fluorescent dyes, respectively. A five-base read from a sequencing reaction produced the following color sequence, read by the computer: red, yellow, yellow, green, green. What is the sequence of the template DNA
Answers
The sequence of the DNA template is ACCTT. This is because a five-base read from a sequencing reaction produced in the color sequence, read by the computer such as red, yellow, yellow, green, and green.
What do you mean by DNA Template?DNA template may be defined as the strand that is utilized during transcription to construct RNA. It is complementary to the target strand of the DNA.
ddNTPs are labeled with the fluorescent dyes specifically like ddATP is labeled with the red fluorescent dye, ddTTP is labeled with the green fluorescent dye, ddCTP with the yellow, and ddGTP with the blue. The sequence that is synthesized during the sequencing reaction possesses colors like red, yellow, yellow, green, and green.
Therefore, the sequence of the DNA template is ACCTT.
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Which movement of particles would be most affected by a disorder that causes damage to carrier proteins?
osmosis
passive transport
active transport
diffusion
Answers
Answer:
osmosis
Explanation:
I'm so sorry if I'm wrong, I'm pretty sure that's it though
The movement of particles that would be most affected by a disorder causing damage to carrier proteins is active transport.
What is active transport?Active transport is a cellular process that requires the use of energy to move particles across a cell membrane against their concentration gradient, from an area of lower concentration to an area of higher concentration. Carrier proteins play a crucial role in active transport by facilitating the movement of specific molecules or ions across the cell membrane. These proteins bind to the particles being transported and undergo conformational changes that allow them to move the particles across the membrane.
If there is damage to the carrier proteins due to a disorder, their ability to bind to and transport particles may be compromised. This impairment can disrupt the active transport process, leading to a decrease or complete loss of the movement of particles against their concentration gradient. Consequently, the normal cellular functions that rely on active transport, such as nutrient uptake, ion regulation, and maintenance of cellular homeostasis, would be significantly affected.
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the circumference of a circle is 14p cm. What is the radius of the circle?
Answers
Answer:
87.9646 cm.
Explanation:
88 cm
Explanation:
Radius = 14 cm
Circumference = 2πr
=> 2 × 22÷7 × 14
=> 2 × 22 × 2
=> 44 × 2
=> 88 cm.
How do plants compete with each other?
Answers
Answer:
Plants compete with eachother for necessary resources. They compete for nutrients, light, water, space, and pollinators.
Explanation:
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What would happen if one or more of either of the spring’s structures was not the right shape? Give an example.
Answers
Answer:
I think it wouldn’t make what it’s needed for work properly, it could cause it to not fit or work at all.
Explanation:
I hope it helps! Have a great day!
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It make what it’s needed for work properly, it could cause it to not fit or work at all.
What is Springs structure?The Spring framework, sometimes known as Spring, has arisen as a response to all of these issues.
This framework eliminates the complexity associated in designing enterprise applications using EJB by leveraging a variety of innovative techniques, including as dependency injection (DI), aspect-oriented programming (AOP), and plain old Java objects (POJO).
Dependable, and scalable enterprise applications can be created by Java EE 7 developers using the open source, lightweight Spring framework. The primary goal of this framework is to offer you a variety of tools for managing your business objects.
Therefore, It make what it’s needed for work properly, it could cause it to not fit or work at all.
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A student set up an experiment to investigate osmosis as shown in Figure 9
The student used visking tubing which is a partially permeable membrane.
The student put 25cm (cubed) of 20% sucrose solution into visking tube 1 and 25cm (cubed) of distilled water into visking tube 2. Both tubes were placed in a 5% sucrose solution and left for 1 hour.
Explain how (will they increase/decrease in size) and why( will water be leaving the potato by
osmosis or moving into the palato by osmosis) tube 1 and tube 2 would look different after one
hour.
Answers
The size of tube 1 will eventually rise due to the entry of water. As a result of this, it will swell due to osmosis. While tube 2 would stay the same as the initial size.
What is Osmosis?Osmosis may be defined as the process through which the movement of solute molecules may take place from a lower concentration of solution to a higher concentration of solution through a semipermeable membrane. It is also called the net movement of water across a semipermeable membrane.
According to the context of this question, the actual reason for this increase in the size of the tube is due to osmosis, water will enter tube 1 in order to dilute the sucrose. Due to this, tube 1 may increase in size. But on contrary, the size of tube 2 remains the same because there is no need for dilution of the solution in which it is placed.
Therefore, the size of tube 1 will eventually rise due to the entry of water. As a result of this, it will swell due to osmosis. While tube 2 would stay the same as the initial size.
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Which prokaryotic group is most closely related to eukaryotes?.
Answers
Which compound is produced when bacteria convert atmospheric nitrogen in the process if nitrogen? fixation?
nitric acid
ammonia
nitrogen gas
phosphorus
Answers
In the process of nitrogen fixation, the compound that is produced by bacteria from atmospheric nitrogen is ammonia.
What is nitrogen fixation?This is a chemical and biological process in which bacteria take atmospheric nitrogen (N2) and convert it into different nitrogen-derived substances.
What is the importance of this process?This process is essential for life as it provides plants with nitrogen rich substances they can use as atmospheric nitrogen cannot be taken by plants.
What is the product of this process?There are three main products:
Ammonia (NH3)Nitrates (N02)Nitrites (NO3)Learn more about nitrogen in: https://brainly.com/question/16711904
Answer:
Ammonia
Explanation:
I took the test! :)
True or False: Trilobites walked among flowering plants
Answers
Explanation:
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False ,
Because Trilobites extincted 250 million years ago but the first flowering plant appeared at Cretaceous period.
What is atmospheric perspective? a. the effect produced by rounding objects to appear three-dimensional. b. the effect produced by techniques that make objects appear to go back into the distance, creating a realistic look. c. the effect produced by diffusion of light in the atmosphere whereby more distant objects have less clarity of outline and are lighter in tone. please select the best answer from the choices provided a b c
Answers
The Atmospheric perspective is the effect produced by diffusion of light in the atmosphere whereby more distant objects have less clarity of outline and are lighter in tone.
What is atmospheric perspective?Atmospheric perspective refers to a form.of illusional effect and atmosphere produce or reflect on an object. It is also the method use to create the illusion of depth in a painting or drawing work by changing the colour so as to simulate changes effected by the atmosphere on the colours of things seen at a distance.
Therefore, The Atmospheric perspective is the effect produced by diffusion of light in the atmosphere whereby more distant objects have less clarity of outline and are lighter in tone.
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Answer:
Its CExplanation:
The statement preganglionic axon terminals release acetylcholine is.
Answers
Answer:
The statement preganglionic axon terminals release acetylcholine is true
Why does it make good metabolic sense for phosphoenolpyruvate carboxykinase, rather than pyruvate carboxylase, to be the primary target for the regulation of gluconeogenesis at the level of control of enzyme synthesis?.
Answers
Because oxaloacetate is required by the body for other metabolic pathways, it is best to regulate gluconeogenesis at the level of synthesis of phosphoenolpyruvate carboxykinase.
What is metabolic regulation?Metabolic regulation refers to the various mechanisms employed by the cells and tissues to regulate metabolic activities in the body.
One form of metabolic regulation is gene expression regulation.
Phosphoenolpyruvate carboxykinase converts oxaloacetate to phosphoenolpyruvate while pyruvate carboxylase converts pyruvate to oxaloacetate.
Since oxaloacetate is required by the body for other metabolic pathways, it makes sense to regulate gluconeogenesis by regulating level of synthesis of phosphoenolpyruvate carboxykinase.
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One of the most remarkable aspects of the cranium named Irhoud 10 is Group of answer choices the face shape is typical of Homo habilis. the face shape is typical of Homo erectus. it dates to 1.5 million years old. it dates to 315,000 years old.
Answers
One of the most remarkable aspects of the cranium named Irhoud 10 is that it dates to 315,000 years old.
What is Irhoud 10?
This is regarded as a fossil which was found in Jebel Irhoud. It is a cranium with a distorted braincase and fragments of the face.
The remarkable aspect is the age of the fossil which dates back to 315,000 years old..
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Disease-causing microorganism, such as a bacterium or virus.
(1 Point)
pathogen
antigen
allergen
prion
Answers
pathogen
Explanation:
pathogen is a bacterium, virus, or other microorganism that can cause disease.
Answer:
pathogon is bacterium,virus and ...
(PLEASE HURRY IM TIMED)The leaf shown has a color pattern of green and white
Which part of the leaf most likely produces the most glucose?
1. the green part, because it contains the chlorophyll
2. the white part, because it contains the chlorophyll
3. the green part, because it contains carbon dioxide
4. the white part, because it contains carbon dioxide
Answers
explaination of osmosis,exosmosis, endosmosis
Answers
Answer:
1. OSMOSIS: The movement of water molecules from a region of higher concentration to a region of lower concentration through a selectively- permeable membrane is called Osmosis.
2. EXOSMOSIS: When water moves out of the cell causing the cell to shrink in a hypertonic solution is called Exosmosis.
3. ENDOSMOSIS: When water moves inside the cell causing the cell to swell in a hypotonic solution is called Endosmosis.
Hope this helps. I have underlined the keywords.
Complete the following food chain.
hawk
⇒
mouse
⇒
grass
Answers
Answer:
Grass => mouse => hawk.
Explanation:
Grass is a Producer of Food chain, followed by next trophic level of our food chainMouse is a Primary Consumer of Food chain,Hawk is a Secondary Consumer of Food chain.Another Example of our food chain on this ecosystem:
Grass => Grasshopper => Frog => Snake => Eagle.Complete the sentence. _____ is relatively lightweight and easy to transport through a series of pipes to refineries that form different fuels. Coal
Steam
Crude oil
Natural gas
Answers
Fuels are the energy-providing substances that drive machines and vehicles. Crudeoil is lightweight and easy to transport fuel. Thus, option C is correct.
What is crude oil?Crude oil also called unrefined petrol that is a thick and viscous liquid but is light in weight and can be easily transported through the pipes in the refineries.
They vary in composition which makes different fossil fuels. Coal are solid material that cannot be transported and similarly, natural gas and steam are gaseous substances.
Therefore, crude oil is the correct blank.
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Do you think human population growth is a concern in the United States? Explain your reasoning.
Answers
Answer:
In my opinion, Yes the human population growth is a concern in the United States because Human population growth impacts the Earth system in a variety of ways, including:
Increasing the extraction of resources from the environment. These resources include fossil fuels (oil, gas, and coal), minerals, trees, water, and wildlife, especially in the oceans. The process of removing resources, in turn, often releases pollutants and waste that reduce air and water quality, and harm the health of humans and other species.Increasing the burning of fossil fuels for energy to generate electricity, and to power transportation (for example, cars and planes) and industrial processes.Increase in freshwater use for drinking, agriculture, recreation, and industrial processes. Freshwater is extracted from lakes, rivers, the ground, and man-made reservoirs.Increasing ecological impacts on environments. Forests and other habitats are disturbed or destroyed to construct urban areas including the construction of homes, businesses, and roads to accommodate growing populations. Additionally, as populations increase, more land is used for agricultural activities to grow crops and support livestock. This, in turn, can decrease species populations, geographic ranges, biodiversity, and alter interactions among organisms.Increasing fishing and hunting, which reduces species populations of the exploited species. Fishing and hunting can also indirectly increase numbers of species that are not fished or hunted if more resources become available for the species that remain in the ecosystem.Answer:
Yes the human population growth is a concern in the United States because Human population growth impacts the Earth system in a variety of ways, including:
Increasing the extraction of resources from the environment. These resources include fossil fuels (oil, gas, and coal), minerals, trees, water, and wildlife, especially in the oceans. The process of removing resources, in turn, often releases pollutants and waste that reduce air and water quality, and harm the health of humans and other species.
Increasing the burning of fossil fuels for energy to generate electricity, and to power transportation (for example, cars and planes) and industrial processes.
Increase in freshwater use for drinking, agriculture, recreation, and industrial processes. Freshwater is extracted from lakes, rivers, the ground, and man-made reservoirs.
Increasing ecological impacts on environments. Forests and other habitats are disturbed or destroyed to construct urban areas including the construction of homes, businesses, and roads to accommodate growing populations. Additionally, as populations increase, more land is used for agricultural activities to grow crops and support livestock. This, in turn, can decrease species populations, geographic ranges, and biodiversity, and alter interactions among organisms.
Increasing fishing and hunting, which reduces species populations of the exploited species. Fishing and hunting can also indirectly increase the number of species that are not fished or hunted if more resources become available for the species that remain in the ecosystem.
Explanation:
Please help me????????!!!!!!!!!!!!!!!!???????!!!!!?????!!!?
Answers
Answer: ur mentally unstable if u dont know
Explanation:
L student