Light-absorbing pigments that are not at the reaction center of a photosystem:
a. are all constructed from chlorophyll.
b. are free floating in the stroma.
c. increase the amount of the visible light spectrum that can be harnessed for photosynthesis.
d. enable photosynthesis to occur in the dark for a short period of time.
e. are identical in all plant species.
Light-absorbing pigments that are not at the reaction center of a photosystem are part of the light-harvesting complex and absorb different wavelengths of light, increasing the amount of visible light spectrum that can be harnessed for photosynthesis. They transfer the absorbed energy to the reaction center to start the light-dependent reactions. However, they are not responsible for photosynthesis in the dark.
Explanation:Light-absorbing pigments that are not at the reaction center of a photosystem mainly help increase the amount of visible light spectrum that can be harnessed for photosynthesis. These pigments, which include different types of chlorophylls and carotenoids, are part of the light-harvesting complex - an array of proteins and pigments that absorb light energy and transfer it to the reaction center of a photosystem.
Each photosystem (both PSI and PSII) in photosynthetic organisms is associated with these light-harvesting complexes. The pigments in these complexes absorb different wavelengths of light, thus allowing the plant to utilize a wider section of the light spectrum.
The energy absorbed by these pigments is transferred from one molecule to another until it reaches the reaction center. Here, the energy is used to initiate the light-dependent reactions of photosynthesis. However, light-absorbing pigments do not enable photosynthesis to occur in the dark because sunlight is the initial energy source required for photosynthesis.
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What is the difference in the rate of carbon exchange (in gigatons per year of carbon) between photosynthesis and respiration in the marine environment?
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1). Identify 3 enzymes involved in DNA Replication and what they do.
2). This is not the complete sequence of amino acids for the protein Luciferin; that is over 900 nucleotides long! However, you did sequence the first ten amino acids in the protein. If you had sequenced all 900, what would be a codon that you would expect to see at the end?
3). Chains of amino acids are sometimes called polypeptides. What types of bonds hold the amino acids together?
4). In your own words, describe the flow of information beginning with DNA and all the way into a protein
which of the following contains the greatest number of totipotent stem cells?
A. a blastocyst
B. an adult
C. a 5-week-old embryo
D. a fertilized egg cell
Answer: D. a fertilized egg cell
Totipotent stem cells are cells which are formed when a sperm fertilizes a egg resulting in a zygote. A zygote being a totipotent stem cell divides many times to develop specialized cells in a new human being. Therefore, a fertilized egg cell has greatest number of totipotent stem cells.
Answer:
D a fertilized egg cell
Explanation:
Differential white blood cell count data table answers
A Differential White Blood Cell Count is a medical test that measures the number of different types of white blood cells in a blood sample. These types include neutrophils, lymphocytes, monocytes, eosinophils, and basophils, and their distributions can help indicate different health conditions.
Explanation:A Differential White Blood Cell Count is a medical procedure that differentiates between the types of white blood cells in a patient's blood. The cells differentiated include neutrophils, lymphocytes, monocytes, eosinophils, and basophils. The frequency of these cell types is usually expressed as a percentage of the total white blood cell count. For instance, a normal differential count could present as follows: neutrophils 50%-70%, lymphocytes 20%-40%, monocytes 2%-8%, eosinophils 1%-4%, and basophils 0.5%-1%.
Increased or decreased levels of the different types of white blood cells in a differential count can indicate various health issues. For example, a high neutrophil count could suggest a bacterial infection, while a high lymphocyte count might indicate a viral infection.
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A differential white blood cell count measures the amount and types of leukocytes in the peripheral blood, with different ranges for different species. These cells, comprising granulocytes and agranulocytes, play a central role in the immune system. Fluctuations in their count can offer clues about ongoing infections or medical conditions.
Explanation:The differential white blood cell count is a test that measures the amount of different types of white blood cells, or leukocytes, found in your blood. Leukocytes are the predominant white blood cells in the peripheral blood and their count varies among different species. For instance, primate counts range from 4,800 to 10,800 cells per µl, dogs from 5,600 to 19,200 cells per ul, cats from 8,000 to 25,000 cells per µl, cattle from 4,000 to 12,000 cells per µl, and pigs from 11,000 to 22,000 cells per ul.
Leukocytes are important as they are a crucial part of the immune system. Different types of leukocytes are identified by their appearance after histologic staining. The granulocytes include neutrophils, eosinophils, and basophils, and the agranulocytes include monocytes and lymphocytes.
Changes in the count of these cells can indicate an ongoing infection or a medical condition. For instance, an elevation in white blood cell count, like in Olivia's case, where the count increased to 28.5 K/µL from a normal range of 6.0–17.5 K/µL, indicates a strong immune response to an infection.
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Mr.etterly, age 66, has just been admitted to the nursing unit reporting severe chest pain, a frequent productive cough, and shortness of breath. physical assessment findings include increased ap chest diameter, finger clubbing, anduse of accessory muscles. abg findings include: ph, 7.32; pao2, 68;paco2, 55; and pahco3, 28. what is the priority problem for mr. etterly? what led the nurse to identify this problem?
The priority problem for Mr. Etterly is Acidosis because his blood pH is found to be 7.32 which is significantly lower than that of normal one.
What are the symptoms of acidosis?The symptoms of Acidosis include shallow breathing, increased heart rate, a frequent productive cough, sleepiness, confusion, fatigue, etc.
The nurse identifies this health problem of Mr. Etterly by analyzing the difference in blood pH.
The pH of the blood is very rarely found to be lower than 7.34 which is slightly acidic in nature due to unable to terminate enough carbon dioxide from your body via the process of breathing.
Therefore, it is well described above.
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identify each items as either an element or a compound
carbon C
carbon dioxide CO 2
hydrogen H
sodium chloride
An unknown galaxy has a disk at its center and arms that spiral from its core. Which of the following classifications would best fit this galaxy's description? Irregular Spiral Lens Elliptical
Answer,
Spiral Galaxy
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The classifications that would best fit this galaxy's description is spiral. The correct option is B.
What is spiral galaxy?In a spiral galaxy, the rotating disc is surrounded by spiral 'arms' that extend outward from a compact centre region.
A spiral galaxy is the Milky Way. Galaxies can be divided into four categories: spiral, barred spiral, elliptical, and irregular.
Elliptical galaxies are less dense in gas and dust than other types of galaxies, contain more seasoned stars, and produce fewer brand-new stars.
Giant elliptical galaxies, the biggest and most uncommon of these galaxies, measure roughly 300,000 light-years across.
A spiral arm emanates from the core of an unidentified galaxy, which features a disc at its centre. Spiral would be the categorization that most accurately describes this galaxy.
Thus, the correct option is B.
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From the capillaries of the abdominal organs and hind limbs, blood flows to the _____. from the capillaries of the abdominal organs and hind limbs, blood flows to the _____. right atrium left atrium aorta capillaries of the lungs inferior vena cava
Blood from the capillaries of the abdominal organs and hind limbs flows into the inferior vena cava. From there, the blood flows into the right atrium and then is pumped into the right ventricle, continuing the blood circulation process.
Explanation:The question asks where the blood flows from the capillaries of the abdominal organs and hind limbs. The blood in this case flows to the inferior vena cava.
The capillaries unite to form venules, which merge into ever-larger veins, eventually flowing into the two main systemic veins, the superior vena cava and the inferior vena cava. The inferior vena cava receives blood from veins beneath the diaphragm, including from the abdominal organs and hind limbs.
The blood in the superior and inferior venae cavae flows into the right atrium, where it is pumped to the right ventricle, continuing the process of blood circulation as long as the individual is alive.
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Dutch elm disease, which has killed millions of elm trees, is caused by a type of _____ fungus. club sac zygote-forming chytrid imperfect
Dutch elm disease, which has killed millions of elm trees, is caused by a type of SAC fungus.
Mostly all the fungi belong to the Phylum Ascomycota kingdom. These fungi are characterized by the formation of a sac-like structure that contains haploid ascospores. These fungi are harmful for both agriculture and medicine purposes.
Answer:
Dutch elm disease, which has killed millions of elm trees, is caused by a type of sac fungus.
What type of sex chromosome will be contained by the sex cells of a female giraffe?
X chromosome
Y chromosome
X and Y chromosomes
Egg cells do not contain sex chromosomes.
Of what is this an example? A child with a widow's peak has a mother who is homozygous dominant for a widow's peak and a father who is homozygous dominant for a widow's peak.
homozygous dominant
homozygous recessive
heterozygous
heterozygous recessive
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X chromosome will be contained by the sex cells of a female giraffe and Homozygous dominant for a widow's peak. So, the correct options for 1 and 2 are (A) and (A) respectively.
What is X chromosome?X chromosome is defined as one of the two sex chromosomes in humans while the other chromosome is the Y chromosome. Sex chromosomes make up one of the 23 pairs of human chromosomes in each cell where the X chromosome spans about 155 million DNA building blocks that are base pairs and represents about 5 percent of the total DNA in cells.
A female giraffe, like many mammals, exhibits dimorphism in female chromosomes, meaning females have XX chromosomes while males have XY chromosomes, unlike other organisms such as birds. A sex cell of an organism is also called a gamete, or a cell that is formed through meiosis or reductional division.
Gametes are haploid which only contain one set of chromosomes. Thus, a female giraffe will produce all gametes containing an X chromosome. While the child having widow's peak is homozygous dominant.
Thus, X chromosome will be contained by the sex cells of a female giraffe and Homozygous dominant for a widow's peak. So, the correct options for 1 and 2 are (A) and (A) respectively.
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An igneous rock interacts with the different layers of Earth and is subjected to heat and pressure over a long period of time. However, it does not melt. Which of these is most likely formed as a result of these interactions? lava magma sedimentary rock metamorphic rock
The word metamorphism is taken from the Greek for “change of form”; metamorphic rocks are derived from igneous or sedimentary rocks that have altered their form (recrystallized) as a result of changes in their physical environment.
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Hot, molten rock crystallizes and hardens to form igneous rocks, which are named after the Latin word for fire.
What are Igneous rocks?Depending on where the molten rock hardens, igneous rocks are classified as either intrusive or extrusive.
Intrusive Igneous Rocks: When magma is imprisoned deep inside the Earth, intrusive, or plutonic, igneous rocks are created. Massive globules of molten rock are rising to the surface.
The majority of the magma is held below, where it slowly cools over many thousands or millions of years before it hardens. Some of the magma may fuel volcanoes on the Earth's surface.
Therefore, Hot, molten rock crystallizes and hardens to form igneous rocks, which are named after the Latin word for fire.
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When critiquing a research study study's theoretical framework, the nurse should keep in mind?
When critiquing a research study's theoretical framework, the nurse should consider the interpretive framework, reliability and validity, and the role of historical context.
Explanation:When critiquing a research study's theoretical framework, the nurse should keep in mind several factors. First, the nurse should consider the function and importance of the interpretive framework, which seeks to understand social phenomena from the participants' point of view. Second, the nurse should assess the reliability and validity of the research study, which refers to the accuracy and consistency of the measurement and findings. Finally, the nurse should critically examine the role that historical context plays in the study, as it can shape community-based participatory research.
Mineral identity is diagnosed primarily through the assessment of ______. physical properties both answers are equally useful in mineral diagnoses chemical properties neither answer is useful in mineral diagnoses
As a cell grows, the ________________ decreases and the cell must divide or die.
The Dunkers is a religious group which moved from Germany to Pennsylvania in the 1700's. The Dunkers do not mate outside of their small group, and this has led to a change in the frequency of certain genes. The Pennsylvania Dunkers are now unique for other populations, including their German relatives. Which of these best describes this occurred?
A) gene flow
B) speciation
C) genetic drift
D) natural selection
Answer:
C) genetic drift
Explanation:
What change is likely to occur in a population of beetles that suddenly faces predation from an invasive species of frogs?
A scientist argues that two species of birds are the same species because they have similar body structure, similar DNA, and similar beaks because they eat the same food. The birds do have some variations in color patterns and have a different mating season. Which piece of evidence would go against this argument and suggest that the birds are actually different species?
The birds have similar body structure.
The birds have similar beaks.
The birds have different color variations.
The birds have different mating seasons.
Which would likely live in the Great Salt Lake?
a. thermoacidophile
b. methanogen
c. Eubacteria
d. halophile
Describe some of the ways that scientists are studying plant root behavior. What have they found?
The b vitamin ________ plays a role in breaking down alcohol in the body.
Explain (in your own words) how blood flows through the heart and throughout the body.
Blood comes into the right atrium from the body, moves into the right ventricle, and is pushed into the pulmonary arteries in the lungs. After picking up oxygen, the blood travels back to the heart through the pulmonary veins into the left atrium, to the left ventricle, and out to the body's tissues through the aorta.
What is the correct order of blood flow from the heart to the body?Oxygenated blood flows into the left atrium through the pulmonary veins. The left atrium contracts. Blood flows through the mitral valve into the left ventricle. The left ventricle contracts and blood flows into the body along the aorta.
So, the correct answer is 'Right atrium, right ventricle, left atrium, left ventricle.
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A 41 year-old female has carpal tunnel syndrome in her left hand. the patient underwent release of the carpal ligament with internal neurolysis. an incision was made directly over the carpal ligament through the skin to the carpal ligament. under direct vision the carpal ligament was divided then internal neurolysis of the median nerve was performed using a magnifying loupes. what cpt® code is reported?
Explain why bacteria grew in the crushed vial but not in the vial that was intact
Which part of a plant absorbs most of the water and minerals taken up from the soil? question 8 options:
a.the thick parts of the roots near the base of the stem
b.storage roots
c.root cap
d.sections of the root that have secondary xylem
e.root hairs?
The correct answer is root hairs. Root hairs are extensions of fibrous or tap roots and they are adapted to absorption of water and nutrients from soil. They are long and thin which makes them able to penetrate soil particles so that they can obtain nutrients and moisture. They also have increased surface area which accelerates the absorption process.
Answer:
e. root hairs
Explanation:
The uptake of water and mineral salts in plants occurs mostly at the root epidermis level, especially through root hair. These structures are extensions of epidermal cells that increase the surface area of contact with the ground, and consequently the absorption capacity.
These root hairs are microscopic and are actually extensions of the root epidermis cells. The presence of these hairs makes the root area available for the absorption of these resources to be much larger.
when weather conditions are disrupted by El Nino how does this affect ocean nutrients
Answer:
Oceans upwelling decreases, reducing levels of nutrient-rich water
Explanation:
Typically, trade winds blow from east to west in the Pacific pushing warm surface ocean waters towards Asia. This causes upwelling of cold ocean currents from the depths of the oceans on the west coast of South America bringing up nutrients from the depths.
During Elnino, however, these trade winds weaken, and predominant winds blow eastwards, reducing this upwelling of colder deeper waters.
When weather conditions are disrupted by El Nino then Oceans upwelling decreases and levels of nutrient-rich water is reduced.
Further Explanation:
The Pacific Ocean is the Earth's largest and deepest Oceanic division that stretches from Arctic Ocean towards North to Southern Ocean towards South. It is also bounded Australia and Asia in the Western side and America on the eastern side. It covers consists of the Earth's 46% total surface water. The imaginary line Equator that splits the Earth Into two hemispheres passes through it centrally and divides the Earth into the Southern hemisphere and Northern Hemisphere.
Warm current in the Pacific Ocean is caused due to change in the temperature of the water that is called El Nino. It is related to the belt of warm ocean water developed in the central and eastern-central equatorial Pacific that includes the area of South America's Pacific coast. El Nino is conveyed by western Pacific high air pressure and eastern Pacific low air pressure. The countries that are under the developing stage get most affected by it, particularly those countries that depend on fishing and agriculture.
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Answer Details:
Grade: High School
Subject: Biology
Chapter: Ecology
Keywords:
El Nino, pressure, pacific, air pressure, fishing, agriculture, southern hemisphere, northern hemisphere, split, earth, south, Australia.
Mosses, ferns, and lichens are primitive flowerless plants that usually reproduce by producing _______. A. fruit B. seeds C. spores D. cones
A dog chasing a rabbit needs energy from the food it has eaten. Which process makes the most usable energy for the dog?
A. the citric acid cycle
B. photocynthesis
C. the electron transport chain
D. glycolysis
Electron transport chain
Answer: Option (C) is the correct answer.
Explanation:
When simultaneous reduction and oxidation helps in transfer of electrons from an electron donor to an electron acceptor then it forms an electron transport chain.
There is also transfer of protons along with transfer of electrons. As a result, it helps in the synthesis of adenosine triphosphate (ATP) which helps in storage of energy in the form of highly strained bonds.
Thus, we can conclude that the electron transport chain is the process which makes the most usable energy for the dog.
Monkeys and bats have similar bone structure in their forelimbs. However, monkeys have longer forelimbs to use for climbing and swinging in trees. Bats have shorter forelimbs to use for flight. Which term best describes how monkey and bat forelimbs are related to each other? homologous, embryonic, analogous, or vestigial.
They are homologous because they have similar structure regardless of purpose.
What are Homologous organs?Homologous organs are those that share the same anatomical structure but perform different functions. Here are some examples of homologous organs. Cockroach, bee, and butterfly mouthpieces.
Organs that are structurally identical but have diverse purposes are known as homologous organs.
Divergent evolution gave rise to them. Divergent evolution occurs when organisms with comparable ancestors evolve identical structures that can carry out distinct functions in varied environments.
Therefore, They are homologous because they have similar structure regardless of purpose.
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n the modern classification system birds are in a separate _______ from reptiles, but fossil evidence shows they have ___________.
Answer:
N the modern classification system birds are in a separate group from reptiles, but fossil evidence shows they have the same ancestry.
Explanation:
It is true that birds and reptiles are classified in different groups, since they present different anatomical, structural and biological differences, however these animals have several similarities, since they probably descend from the same ancestor.
It is well accepted in the scientific community that birds emerged from groups of dinosaurs, that is, that birds and reptiles were formed by the same ancestor. For many scholars, for reptiles to become a valid group, birds should be part of that group, but it was decided that mantles would be better in different groups.