The correct answer is B) 1. photosystem II 2. photosystem II 3. photosystem I
1. Light energy excites electrons at photosystem II
2. Water molecules are split at photosystem II.
3. NADPH is formed at photosystem I.
When photosystem II receives light energy, electrons are expelled from its reaction center. The oxidized reaction center of photosystem II split water into protons, electrons and oxygen. The electrons released from water reduces oxidized reaction center of photosystem II. The expelled electrons expelled from photosystem I reduces oxidized NADH+ to NADH at photosystem I.
Identify two ways in which environmental resources are important to human health.
Each primary bronchus enters a lung and branches into smaller ________.
Which of the following describes asexual reproduction?
infertile offspring through genetic exchange
fertile offspring despite geographic isolation
two parent organisms and genetic exchange
one parent organism and no egg or sperm
Answer:
one parent organism and no egg or sperm is the correct answer.
Explanation:
Asexual reproduction in which single-parent give rise to several offsprings, without the fusion of gametes.
One parent organism and no egg or sperm:Asexual reproduction takes place in simple organisms,and these organisms are not able to develop sex cells(egg or sperms)
In asexual reproduction single parent organism divide to produce several offspring and they are genetically identical to their parents as they reproduce without the involvement of another organism.
Which of these is an example of recombination of atoms to form newer molecules?
Molding a wire of gold
Hammering a piece of iron
Tarnishing of a silver coin
Rolling of a sheet of aluminum
Answer: Option (c) is the correct answer.
Explanation:
When there is recombination of atoms to form newer molecules then it is called a chemical change.
For example, [tex]A-B + C-D \rightarrow A-C + B-D[/tex] is a chemical change.
Tarnishing of a silver coin is a chemical change which occurs when silver reacts with moisture in the air as a result silver loses its luster.
Thus, we can conclude that out of the given options tarnishing of a silver coin is an example of recombination of atoms to form newer molecules.
4. Enzymes are (choose one) a. Lipids c. Proteins b. Carbohydrates d. Nucleic acids
1. What is the basic unit of organization of all living things?
2. What is the difference between an organ and an organ system?
3. For your organ system, describe how the system works at the organ level.
4. For your organ system, describe how the system works at the tissue level. 5. Describe what would happen if an organ in your specific organ system stopped working.Level 1: Organ System
Level 2: Organ
Level 3: Tissues of
the __________________ System
The basic unit of all living things is the cell. An organ is a structure made of tissues to perform a specific function, while an organ system is a group of organs performing complex functions. If an organ in a system stops working, the entire system can fail, causing severe consequences. Tissues of the Circulatory System comes under Level 3.
Basic Unit of Organization:
The basic unit of organization of all living things is the cell. Cells are the building blocks of life, capable of performing essential functions needed for the organism's survival.Difference between an Organ and an Organ System:
An organ is a structure composed of different tissues working together to perform a specific function. An organ system is a group of organs that work together to perform complex functions for the organism. An example of an organ is the heart, while the circulatory system is an organ system that includes the heart, blood vessels, and blood.Organ System at the Organ Level:
For the circulatory system: The primary organ, the heart, pumps blood throughout the body. The heart ensures that oxygen-rich blood reaches various organs, and deoxygenated blood is returned to the lungs for oxygenation.Organ System at the Tissue Level:
For the circulatory system: The heart's tissues, like cardiac muscle tissue, comprise cells coordinated to contract rhythmically and propel blood. Endothelial tissues line the blood vessels, facilitating smooth blood flow and protecting the vessel walls.Impact of Organ Failure in Organ System:
If an organ within the circulatory system, such as the heart, stops working, it would result in the cessation of blood circulation. This failure would deprive all other organs and tissues of oxygen and nutrients, ultimately leading to organ failure and organism death.Levels of Organization in Living Things:
From simplest to most complex, the levels of organization in living things are:AtomsMoleculesCellsTissuesOrgansOrgan SystemsOrganismsComplete Question:
1. What is the basic unit of organization of all living things?
2. What is the difference between an organ and an organ system?
3. For your organ system, describe how the system works at the organ level.
4. For your organ system, describe how the system works at the tissue level.
5. Describe what would happen if an organ in your specific organ system stopped working.
Level 1: Organ System
Level 2: Organ
Level 3: Tissues of the __________________ System
Active transport occurs in cells, for example, when the Na-K pump is at work. Any process that involves active transport most often involves the A) movement of molecules without any predictable pattern. B) movement of molecules from a lower concentration to a higher concentration. C) movement of molecules from a higher concentration to a lower concentration. Eliminate D) movement of molecules from a lower to higher concentration and then back to the point of origin.
Essenger rna is usually polycistronic in eukaryotes. messenger rna is usually polycistronic in eukaryotes.
a. True
b. False
Which element you are more likely to find as a free element rather than a compoung -lead or calcium?
Through an increase in the generation of reactive oxygen species, lead has an impact on the endothelium's vasoactive function.
What is the function of lead in biological process?Lead is known to cause serious health problems that may be irreversible once it enters the body. Lead has no recognized biological role in the body.
Nearly all the body's major organ systems, including the hematopoietic, renal, neurological, and cardiovascular systems, are affected.
Red blood cell synthesis is significantly impacted by lead. Seizures, comas, and even death have been linked to extremely high lead levels.
A kid may experience developmental delays, a lower IQ, hyperactivity, learning impairments, behavioral issues, decreased hearing, and stunted growth at lower levels of exposure.
Therefore, Lead (Pb) is a transition metal that is less reactive and extremely stable by itself.
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In the cells of some organisms, mitosis occurs without cytokinesis. this results in ________.
a. cell cycles lacking an s phase
b. cells lacking nuclei
c. cells that are unusually small
d. cells with more than one nucleus
When mitosis occurs without cytokinesis, it leads to cells with more than one nucleus. This results from the genetic material being divided without the subsequent division of the cell's cytoplasm, possibly leading to larger, abnormal cells that can be indicative of cancer.
Explanation:In the cells of some organisms, when mitosis occurs without cytokinesis, the resulting condition is cells with more than one nucleus. This happens because the cell divides its genetic material during mitosis but fails to complete the process by not undergoing cytokinesis, which is the division of cytoplasm to form two separate cells. This cell cycle aberration can lead to larger cells containing multiple nuclei, which is often an unwanted phenomenon that could indicate the presence of cancerous cells.
Cell cycle control is crucial for an organism's health as it ensures that cells divide correctly and maintain proper function. If this control is lost, cells may begin to divide uncontrollably, which is a characteristic of cancer, leading to the formation of tumors.
The cell cycle has two major phases: interphase, where the cell grows and the DNA is replicated, and the mitotic phase, where the cell actually divides. The mitotic phase includes karyokinesis (the division of the cell's nucleus) and usually cytokinesis. However, when cytokinesis does not occur, the result is a multinucleate cell, which has replicated DNA and might be larger in size but hasn't physically separated into two individual daughter cells.
List the 3 basic steps/pathways to all of the sensory systems
To prevent back injury, the nurse should instruct the client to
The central nervous system has three "thermostats," each with its own thermal _______ that relates to its distance from the body core
In _____, an animal bonds with the first object it sees after birth.
Answer: Imprinting
Explanation:
Imprinting is the phenomenon usually seen in animals in which the animals bonds to the first object it sees.
It is mostly seen in the animals like duck, in which the ducklings walk in the same way the big ducks walks.
It is a kind of phase sensitive behavioral learning in which a animal or a person learns from the stimulus of their surrounding.
what Closely stacked, flattened sacs (plants only)
The closely stacked, flattened sacs found in plants are called thylakoids and they are an important component of the chloroplasts. Thylakoids are responsible for housing the chlorophyll molecules.
Explanation:The closely stacked, flattened sacs found in plants are called thylakoids and they are an important component of the chloroplasts. Thylakoids are responsible for housing the chlorophyll molecules, which are essential for photosynthesis, the process by which plants convert sunlight into energy.
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Closely stacked, flattened sacs in plants refer to thylakoids, which are found within chloroplasts – vital for photosynthesis. Stacks of these sacs are called grana, and the fluid surrounding them within the inner membrane of the chloroplast is the stroma.
Explanation:The closely stacked, flattened sacs you're asking about are a component of plant cells known as thylakoids. These are found within chloroplasts that are key to photosynthesis. Notably, chloroplasts, like mitochondria, have outer and inner membranes.
However, within the space enclosed by a chloroplast's inner membrane is a set of interconnected and stacked fluid-filled membrane sacs known as thylakoids. Each stack of thylakoids is referred to as a granum (plural = grana). The fluid enclosed by the inner membrane surrounding the grana is known as the stroma.
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What is the usual mode of stimulus transfer in neuron-to-neuron interactions?
_________ are organic substances essential for normal metabolism, growth and development of the body
The naturally occurring, generally low level sound produced by an environment is called
(01.06 mc) you are a stem cell therapist who is researching a stem cell therapy to help broken bones heal faster. this therapy involves injecting stem cells into broken bones. which type of cells would you likely be injecting? osteoblasts osteoclasts osteocytes osteogenic cells
How can we increase our absorption of dietary magnesium?
We can increase our absorption of dietary magnesium by eating a balanced diet that includes magnesium-rich foods, ensuring we have sufficient Vitamin D levels, reducing our alcohol intake, and keeping a healthy balance of fibrous foods.
Explanation:The question is about how to increase dietary magnesium absorption. This falls under the category of nutritional science, a branch of Health studies. Magnesium is a crucial mineral the body needs for various functions such as muscle and nerve function, blood sugar control, and blood pressure regulation.
You can increase your absorption of dietary magnesium in quite a few ways. One important way is by consuming a balanced diet that includes magnesium-rich foods like green leafy vegetables, legumes, nuts, seeds, and whole grains. Vitamin D also plays a role as it helps the body absorb magnesium, so ensuring suitable vitamin D levels can assist.
Reducing alcohol intake can also help because alcohol can interfere with how your body absorbs magnesium. Moreover, a high intake of fibrous foods might also lessen the amount of magnesium your body can absorb. Hence, while fiber is essential for a healthy diet, balance is the key.
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To increase absorption of dietary magnesium, increase intake of magnesium-rich foods, pair them with foods high in dietary lipids, and avoid excessive consumption of caffeine, alcohol, and high-dose zinc supplements.
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Why is cellular respiration and photosynthesis difficult to understand?
Abuse of _______, a pain-relieving prescription medication, is increasing among adolescents and young adults.
Suppose you could selectively prevent production of a-amylase or oligo-1,6-glucosidase in an organism that normally hydrolyzes starch. which enzyme would the organism miss the most
Answer:
The correct answer would be alpha amylase.
Alpha enzyme is an enzyme that catalyzes the break down of alpha linkage present in polysaccharides such as starch, glycogen et cetera.
The help in breaking down complex polysaccharides into simpler units which can be easily absorbed by the body.
For example, alpha amylase is present in the form of salivary amylase and pancreatic amylase in humans. They breakdown the starch into smaller units such as maltose and dextrin.
In contrast, oligo-1,6-glucosidase is an enzyme that catalyzes the breakdown of alpha 1-6 linkage in some oligsaccharides.
Thus, the organism would miss alpha amylase more as compared to oligo-1,6-glucosidase.
In an ecosystem containing the food web shown, one eventual result of a program by farmers to get rid of field mice might be
A. decreased amount of grasses.
B. decreased number of rabbits.
C. increased number of weasels.
D. no change in the number of rabbits.
In an ecosystem containing the food web shown, one eventual result of a program by farmers to get rid of field mice might be to increase the number of weasels.
How to get rid of pests?In an ecosystem, living organisms feed on one another so as to derive energy needed for metabolic activities.
This means that in a farm ecosystem, a farmer can get rid of herbivores like rats by introducing consumers.
Therefore, in an ecosystem containing the food web shown, one eventual result of a program by farmers to get rid of field mice might be to increase the number of weasels.
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Carbohydrates, lipids, proteins and nucleic acids are considered _____________, which means they are large organic molecules.
A. Macromolecules
B. Micromolecules
C. Nanomites
D. Polar
Carbohydrates, lipids, proteins and nucleic acids are considered Macromolecule which means they are large organic molecules.
Thus, A vast variety of both good and bad foods, including bread, beans, milk, popcorn, potatoes, cookies, spaghetti, soft drinks, corn, and cherry pie, include carbohydrates.
They can take on various shapes as well. Starches, fibres, and sugars are the most prevalent and plentiful types.
Carbohydrate-rich foods are a crucial component of a balanced diet. The body receives glucose from carbohydrates, which is then transformed into energy for maintaining biological processes and engaging in physical activity.
Thus, Carbohydrates, lipids, proteins and nucleic acids are considered Macromolecule which means they are large organic molecules.
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The flow of energy from an ecosystem to an organism and from one organism to another is called ______
Diffusion is the movement of molecules from regions of ____________ concentrations to regions of ____________ concentration until ____________ is reached.
Answer:
The answer is 1)High 2)Low 3)Balanced.
Explanation:
Diffusion is an irreversible physical process, in which material particles are introduced into a medium in which it was initially absent. Diffusion is the process in which atoms or molecules move from a region of high concentration to an area of low concentration. In most cases, diffusion occurs in gases and liquids. During diffusion, the movement of matter continues until there is a balanced distribution.
At which part of its orbit is the planet traveling at the greatest speed?
A
B
C
D
Answer:
d
Explanation:
If an organism expresses a recessive phenotype, can you tell the genotype? Explain your answer by giving an example.
Was 2006 an El Niño year? Why or why not?