How many rings does chlorophyll a and b have
Answers
Explanation:
Each has one chlorin ring- chlorin is a form of porphyrin.
Chlorophylls are comprised of a ringed molecule, chlorin, a hydrogenated form of porphyrin which contains a magnesium ion at the center, bonded to four atoms of nitrogen. Varying types of Chlorophyll have side chains, which affect the absorption spectrum of the molecule for instance A has a methyl group bonded to the C7 position, while B has an aldehyle (CHO) group at this location.
Embedded within the thykaloid membrane of chloroplasts, chlorophyll a and B mainly absorb orange-red and violet-blue wavelengths and convert light energy into chemical energy for the process of photosynthesis. This occurs in the light-dependent reactions of photosynthesis, within chloroplasts of plants. The range of wavelengths absorbed by a pigment is its absorption spectrum while it reflects those outside of this range. Plants appear green as this region of light is reflected by the pigments.
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Related Questions
The fundamental sedimentairy rock unitcan be normally traced for long distances
Answers
Formation is the fundamental sedimentary rock unit can be normally traced for long distances .
Explanation:
When the energy of the transformation is not enough it is settled and deposites in the particular area for the long time. It can be formed at the earth surface by the accumulation of sediments.
The sedimentary rocks are separated by the break called bedding planes. For the formation of the sedimentary rock the sedimentary bed is the basic unit of the formation.
The sedimentation of rock can be classified as weathering erosion, transportation, deposition, lithification of the sedimentary rock unit.
Describe how humans’ way of life has changed. Begin with hunter-gatherers and end with life after the Industrial Revolution.
Answers
Answer:
Ever since the existence of life of humans on Earth, the humans have been making progress to understand themselves and the mother nature.
In the start, the humans were hunter- gatherers. Hunter- gatherers can be described as humans which use wild life plants and animals for food. The humans used to live in jungles and eat the wild- life plants and animals. They used leaves from the trees to cover their bodies. Heat was produced by rubbing the rocks.
After this time, the humans learned the techniques of cultivating plants for food. They started cultivating crops and depend on them for living. During this time, humans learned the art of farming and agriculture. But they couldn't understand the effects of various pathogens infecting the crops and humans at that time.
After this time, humans learned the art of preserving foods in different forms like pickles etc. They also learned that certain types of plants could be used to treat wounds and other diseases.
With the passage of time, people learned to make and use machinery for making their tasks easier. The usage of machinery progressed rapidly and the industrial revolution began. People became more diverted to this sector rather than farming. They started to move towards the cities to find better jobs in industries.
Life after industrial revolution was much easier as humans had made a lot of equipments which aid them to have a better life style. Science has been developing since that time day by day.
Explanation:
Which of the following elements is a trace element?
Answers
in the diagram the top square and circle represents the generation
Answers
Answer:
D
Explanation:
The top square and circle represent the decreased male and decreased female generation in a given diagram.
What are the causes of decreased men proportion within a generation?A square or rectangle represents a male gender, while a circle represents a female gender. The term decreased indicates a reduction in the population of males and females. In the given, diagram, the top square and circle represents the decreased male and decreased female generation.
Various factors are responsible for decreased male and decreased female generation in a given generation which include changes in birth rates, death rates, and migration patterns can all affect the number and proportion of males and females in a given population.
Exposure to environmental pollutants or toxins also have a negative impact on the reproductive health of both males and females resulting in lower birth rates. Economic factors such as poverty, lack of healthcare, illiteracy are some other factors. Smoking, alcohol consumption, and poor nutrition also effect the fertility and reproduction.
Therefore, the top square and circle represent the decreased male and decreased female generation in a given diagram.
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Which of these describes a method in studying plate movements?
-Observing the absence of magnetic rocks in locations that do not match the poles
-Match relief elements only on the western side of the Atlantic Ocean
-Recording the spread of the seafloor in the mid-Atlantic region
-Correlate the rotation of Earth to plate movement
Answers
Answer:
C: Recording the spread of the seafloor in the mid-Atlantic region .
This describes a method in studying plate movements
Explanation:
Seafloor spreading is the ‘process’ by which oceanic crusts are formed as a result of volcanoes. Then these crusts slowly drift away from the edge/ridge. It usually occurs at mid-ocean edges.
When plates move, they collide. Because of these collisions volcanoes and earthquakes occur. Volcanoes occur when one plate sinks under another plate. This allows the lava to get inside the plates and volcano occurs after the build-up of this magma or lava. Earthquakes are caused when two plates collide and slide with each other. Thus, Option C is the correct answer as plate movements eventually cause se floor spreading.
what happens to pyruvic acid in the krebs cycle
Answers
Answer:
During kerbs cycle pyruvate is converted to Acetyl CoA .The so formed Acetyl CoA then enters the krebs cycle.
Explanation:
Pyruvate is the end product of glycolysis.Pyruvate is converted into Acetyl CoA by the catalytic activity of pyruvate dehydrogenase enzyme which uses NAD+ as a coenzyme.
The formation of pyruvate to Acetyl CoA is termed as oxidative decarboxylation.
In the Krebs cycle, pyruvic acid is converted into acetyl CoA, a two-carbon molecule. This acetyl CoA then undergoes a series of reactions in the cycle, producing high-energy molecules such as NADH, FADH2, and ATP.
Explanation:In the Krebs cycle, pyruvic acid is converted into acetyl CoA, a two-carbon molecule. This acetyl CoA then undergoes a series of reactions in the cycle, producing high-energy molecules such as NADH, FADH2, and ATP.
Acetyl CoA enters the cycle by combining with a four-carbon compound called oxaloacetate, resulting in the formation of a six-carbon compound called citric acid. The carbons from pyruvic acid are gradually released as carbon dioxide during the cycle.
In one turn through the cycle, one molecule of ATP is produced, along with three molecules of NADH and one molecule of FADH2.
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mention the feature of adaptation azadirachta indica
Answers
Answer:
Azadirachta indica is also known as the neem tree. It is mostly present in the Indian subcontinent hugely used for providing shade to people from the Sun.
One of the best adaptation quality of Azadirachta indica is that it is drought resistant. It can grow in any types of soil. However, it grows best in sandy soils and drained soil conditions.It has the ability to survive in very hot conditions and can survive at temperatures as low as 4 degrees Celsius.
What type of inheritance is observed in this pink and yellow flower?
Answers
Answer:
The correct answer is CODOMINANCE.
Explanation:
The transfer of genes from one generation to another is called inheritance.
The image shown above is the perfect example of codominance. when both the parents show equal dominance in the generation is called CODOMINANCE.
In this case, the mother genes (red) and the father gene( white) both show an equal effect on the offspring and both show their effect.
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explain the similarities and differences in the development of european culture and middle eastern culture
Answers
Answer:
There are many similarities and differences between the two cultures.
Explanation:
Similarities are as follows: -
Anti-regime movements in both Eastern Europe and Middle East brought many political and military changes. Regional concentration is good in both type of cultures which is evident even on the map.Differences are as follows: -
Eastern Europe states were not autonomous. There was stability in the region, Middle east has mix culture, on the other hand, with different levels of autonomy. In Eastern Europe, there were many protesters or revolutionists who were though in small number were popular and had great influences over people. But, even large number of opposition leaders in Middle east, they were not that effective.01:50:43
An individual is severely bumed in a fire. Which of these procedures would help doctors make replacement skin tissue for the
patient?
using reproductive cloning to produce a new layer of skin
manipulating adult stem cells to grow new skin tissue
creating skin tissue by combining cells from different cell lines
growing a layer of skin cells on a matrix that provides structure
Mark this and return
Save and Exit
Next
Sebe
Answers
Answer:
C: creating skin tissue by combining cells from different cell lines
Explanation:
I hope this helps! :)
Answer:
The answer is C
Explanation:
Which statement about water is correct? and why?
a) Water molecules are polar, therefore fatty acids do not dissolve.
b) ice has a higher density than liquid water, therefore some organisms can live under the ice.
Answers
Answer:
A
Explanation:
ice's density is lower that water's density
To prevent the pollution of groundwater, waste water collected from landfills should be A. diluted by mixing it with drinking water. B. filtered by soil and plants. C. piped to nearby lakes and streams. D. treated before it is released.
Answers
Answer:
D.
Explanation:
Answer:
D
Explanation:
If a disturbance were to occur in an ecosystem, which of the following ecosystems would be most vulnerable to extinctions? continental ecosystems island ecosystems marine ecosystems tropical ecosystems
Answers
Answer:
The answer is D: tropical ecosystems
Explanation:
Its is tropical ecosystem because they are the most fragile, and intricate systems
Answer:
marine ecosystems and tropical ecosystems
Explanation:
For example, Caribbean coral reefs, whose natural barrier is at serious risk of disappearance, such as tourist exploitation, overfishing, etc. The Aral Sea is another example of a collapsed and unrecoverable sea.
Climate change will affect many species and habitats and will have a consequence on fishing. Displacements of marine species due to warming of the waters can cause invasions high rates of local extinction in the tropics and seas. Molluscs, echinoderms and corals that form reefs, are very sensitive to crustaceans and fish, which can have harmful consequences for fishing.
Nuclear power plants require a lot of water to operate.
Please select the best answer from the choices provided
T
F
Answers
Answer:
True!
Nuclean plants need to be kept at a relatively low temperature, which means that they need a lot of cooling. The most widely used cooling technique is water circulation similar to central heating system and this is why a lot of water is used.
Explanation:
Answer:
TRUE!!!
Explanation:
The Human Genome Project is devoted to mapping the general DNA sequence of our species. This could lead to the development of new medicines, as well as the possibility of using gene therapy to treat certain diseases. However, there are some ethical issues surrounding the mapping of individual genomes. One concern is A) that your genes may change over time, making the project useless. B) that insurance companies could discriminate based on genetic make-up. C) that since this has never been done before, we should probably not do it now. Reactivate D) that sequencing our individual genomes is so expensive, it is a counter-productive strategy.
Answers
Answer:
D) that sequencing our individual genomes is so expensive, it is a counter-productive strategy.
Explanation:
Gene therapy is a technique for correcting defective genes genes by the insertion, alteration or removal of genes within an individual's cells and biological tissues to treat disease.Although gene therapy is considered as a potential method of treating several diseases but till now a little progress has been seen in this field.Several controversial points include, short lived nature of gene therapy, immune response , problems arising due to viral vectors and possible multigene disorder.There arefew ethical considerations that are to be kept in mind while using gene therapy like deciding what is disability and what is disorder, does searching for a cure demean the lives of individual, the preliminary attempts of gene therapy is very costly etc.Answer:
the answer is B
Explanation:
Georgia's overall coastal habitats were rated and the results can be seen in the bar graph. The coastal habitats by in large were rated as "fair". One important indicator in the graph is the chlorophyll a category. Explain how the ratings for chlorophyll a might influence the overall ratings of coastal habitats. A) The algae that contains chlorophyll a can be detrimental to other life forms. As algae increase the total organic carbon increases. B) The more chlorophyll a present, the more algae present. This can be a result of higher nitrogen and phosphorus and may result in lowered dissolved oxygen if algal blooms develop, C) Chlorophyll, a plant pigment, is measured to indicate the amount of algae in the water. The more chlorophyll a present, the more plant growth and the healthier the aquatic environment. D) There is a direct correlation between algae present and benthic organisms. The more algae, the more benthic invertebrates. That means more abundant food for other animals in the coastal habitats.
Answers
Answer:
b
Explanation:
The more chlorophyll a present, the more algae present. This can be a result of higher nitrogen and phosphorus and may result in lowered dissolved oxygen if algal blooms develops. periodt pooh
Answer:
The answer is: B) The more chlorophyll a present, the more algae present. This can be a result of higher nitrogen and phosphorus and may result in lowered dissolved oxygen if algal blooms develop.
Explanation:
"Eutrophication" is the enrichment of surface waters with nutrients for plants, both nitrogen and phosphorus contribute to eutrophication.
A lake with total concentrations of phosphorus and chlorophyll-a of 10 and 2.5 mg / m3 respectively, can be classified into different eutrophication classes.
The symptoms and effects of eutrophication are as follows:
· Increased production and biomass of phytoplankton, associated algae and macrophytes.
· Production of toxins by certain algae.
· Deoxygenation of water, especially at the end of algal growth situations.
The answer is: B) The more chlorophyll a present, the more algae present. This can be a result of higher nitrogen and phosphorus and may result in lowered dissolved oxygen if algal blooms develop.
forces between compounds that hold them in place
Answers
Answer:
intermolecular forces and intramolecular forces
Explanation:
Intermolecular forces can be described as the forces that are present between molecule or compounds.
Intramolecular forces are forces which are present within a compound or molecule.
For example, consider HCl which is made of hydrogen and chlorine atoms. The forces which will be present between the molecules of HCl will be called as intermolecular forces. The forces which will be present between hydrogen and chlorine will be termed as intramolecular forces.
Which type of population growth is shown in this graph?
Population of Bacteria
Population Size
35,000
30,000
25,000
20.000
15.000
10.000
5000
1
2
3
4
5
6
Answers
Answer: the answer would be 5 are there on the top the answer would be 15.000 because they both can go in and into each other if you did multiply 5 times 3 equals 15
Explanation:
The graph shows exponential population growth.
We can tell this because the population size increases rapidly over time, without showing any signs of slowing down or leveling off. This is characteristic of exponential growth, where the population grows at a constant rate.
In contrast to exponential growth, logistic growth shows a period of rapid growth followed by a leveling off as the population approaches its carrying capacity (the maximum population size an environment can support).
Black mice and tan mice are native species that are observed in a particular region. Human habitation in the region caused an invasive mouse species to enter the region. These mice are brown and share the same food requirements as black mice. Tan mice have different food requirements. How will this change affect the web in the region?
Answers
Answer:
Black mice will be at competition
Explanation:
Before the brown mouse came to the area, they black and tan mice did not compete with each other for food. but now the Brown and black mice compete for food the black mouse population will decrease because of this. tan mouse would have smiliar population to before. this would change the food chain because predators would have less food to eat.
Which describes an oxidation reaction that occurs during cellular respiration?
Answers
Answer:
Glucose loses electrons and hydrogen to form carbon dioxide.
Explanation:
During aerobic respiration, oxygen is reduced, donating an electron to hydrogen to form water. The entire process of cellular respiration oxidizes glucose. The oxygen taken in by a cell combines with glucose to produce energy in the form of Adenosine triphosphate (ATP), and the cell releases carbon dioxide and water. This is an oxidation reaction in which glucose is oxidized and oxygen is reduced.
Pure substances are made up of single elements or compounds. (2 points) True False
Answers
Answer:
true
Explanation:
The statement is true as pure substances consist of only one type of matter, which can be an element or a compound. Elements are made of single types of atoms, while compounds are composed of two or more types of atoms chemically bonded together.
Explanation:The statement 'Pure substances are made up of single elements or compounds' is true. A pure substance has a constant composition and properties that are constant throughout the sample. By definition, pure substances can either be elements or compounds. An element is the simplest form of matter composed of only one type of atom and cannot be broken down into any simpler substance through chemical means. For example, aluminum is an element. A compound, on the other hand, consists of two or more types of atoms chemically bonded together, such as water, which is made up of hydrogen and oxygen atoms. Therefore, pure substances maintain a uniform composition and exhibit definite physical and chemical properties.
. A pure substance is a type of matter that has a constant composition and properties that are constant throughout the sample. Elements are the simplest substances made up of only one type of atom, while compounds are substances that are made up of more than one type of atom.
which is the most accurate statement
A. the scientific method and technology development follow different steps.
B. scientists design new tools when engineers are able to create them.
C. engineers create questions, and scientists try to answer them.
D. science and technology rely on and influence each other.
Answers
Answer:
D: science and technology rely on and influence each other. This is the most accurate statement.
Explanation:
Any technology would use science to solve its problems. Science, in turn, uses technology to make new discoveries and prove them. For example: engineer create microscopes, monitors etc and science uses all these tools to do research and perform their scientific methods for new discoveries. When an engineer thinks of designing something new, he understands science, i.e. he would try to understand all the laws scientists have discovered and proved.
This way both science and technology not only rely on each other but also influence each other.
Identifying Forms of Energy
Match each form of energy with its description.
thermal energy
a piece of fruit hanging from a tree
electrical energy
lightning produced during a storm
kinetic energy
OOUUU
radio waves transmitted from a tower
gravitational potential energy
sand on the beach feels warm
to the touch
a box moving along a conveyor belt
radiant energy
Answers
Answer:
gravitational potential energy-a piece of fruit hanging from a tree
radiant energy-radio waves transmitted from a tower
Thermal energy-sand from the beach feels warm to the touch
Kinetic energy-a box moving along at a conveyor belt
electrical energy- lightning produced by a storm
Explanation:
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the answers are provided in the picture below:
100 POINTS TO ANYONE WHO ANSWER THIS
hat is a job of the muscular system?
remove waste
protect the body from germs
deliver nutrients to the body
provide movement
Answers
Answer:
provide movement
Explanation:
1. Elephant seals from Antarctica dive into the ocean more than 1,500 meters deep at a time—nearly a mile. A seal can stay underwater for an hour or longer. To do that, the seal stores oxygen in its blood cells that is slowly released as it dives. The seal does not expend any extra energy releasing the oxygen stored in its blood cells. Do you think passive or active transport is at work in the blood cells of the elephant seal? Explain your answer.
Answers
Explanation:
Passive transport is at work- the release of oxygen is a passive process, not requiring energy.
Active transport is a mediated process that requires an energy input and the use of specialized membrane proteins to move against the concentration gradient. These proteins require energy in the form of adenosine triphosphate or ATP in order to facilitate necessary conformational changes to the large protein molecules to alter the spatial location of the molecule. For instance, with Na+, K+ pumps in cell membranes.
However, via passive transport or diffusion, small molecules can move from regions of high concentration to regions of low concentration until an equilibrium is reached. This occurs along the concentration gradient, and usually involves small non polar molecules in cells such as oxygen and carbon dioxide.
The passive process is more efficient, as ATP production for active transport requires oxygen; the O2 stores in the blood cells would be depleted quickly. This limits the depth at which the seals can dive, due to their need to resurface to replenish O2 stores.
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13. Direct source of energy for cell processes
Answers
Answer:
Adenosine triphosphate.
Explanation:
Adenosine triphosphate (ATP) is the direct source of energy for cell processes. It is produced in the mitochondria from the breakdown of glucose.
Explanation:The direct source of energy for cellular processes is adenosine triphosphate (ATP). ATP is often referred to as the 'energy currency' of cells. It is an organic compound that provides energy to drive many processes in living cells, such as muscle contraction, nerve impulse propagation, and chemical synthesis. ATP is produced from the breakdown of glucose during cellular respiration, a process that occurs in the mitochondria of the cell.
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Define what terms origin, insertion and tendon
Answers
Answer:
Origin: In biology, origin can be described as the location where the muscle joins a stationary bone and as a result, no movement occurs.
Insertion: In anatomy, insertion can be described as the point of attachment which allows movement of a bone to occur. It moves when the muscles contract.
Tendon: In biology, the tendon can be described as a type of connective tissue which attaches a bone to a muscle.
I will mark brainliest
Help ASAP
Answers
Answer A:
The process of photosynthesis is occurring in image A.
Photosynthesis can be described as a process by which plants use light energy and convert water and carbon dioxide into sugar and oxygen. The sugar produced is the food for the plants. This process occurs in the leaves where chloroplasts are present. Chloroplasts trap light energy.
Answer B:
The organelle is mitochondria. The process which occurs in the mitochondria is cellular respiration.
Mitochondria are known as the power house of a cell. The process of cellular respiration occurs in the mitochondria. By this process, glucose and oxygen are converted into carbon dioxide and water. Energy in the form of ATP is released during this process. The energy is used normal cell functions.
A certain stem cell produces only muscle cells. What kind of stem cell is this?
O
O
A. Multipotent
B. Totipotent
C. Unipotent
O
O
D. Pluripotent
Answers
Explanation:
the kind of cell it is is unipotent cell
Answer:
The answer is C.
C. Unipotent
Explanation:
Which of the following is not a carcinogen
Answers
i think i have gotten this one
The correct answer is D. DNA.
DNA is an example of a substance which isn't a carcinogen.
What is a Carcinogen?These are substances which exposes someone to the risk of cancer. When the body is exposed to these compounds, mutations occur such as uncontrolled cell growth.
This forms tumors which are characteristics of cancerous cells. DNA however isn't an example of a carcinogen.
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