Stem cell research offers great promise for understanding basic mechanisms of human development and differentiation, as well as the hope for new treatments for diseases such as diabetes, spinal cord injury, Parkinson’s disease, and myocardial infarction. However, human stem cell (hSC) research also raises sharp ethical and political controversies. The derivation of pluripotent stem cell lines from oocytes and embryos is fraught with disputes about the onset of human personhood. The reprogramming of somatic cells to produce induced pluripotent stem cells avoids the ethical problems specific to embryonic stem cell research. In any hSC research, however, difficult dilemmas arise regarding sensitive downstream research, consent to donate materials for hSC research, early clinical trials of hSC therapies, and oversight of hSC research. These ethical and policy issues need to be discussed along with scientific challenges to ensure that stem cell research is carried out in an ethically appropriate manner. This article provides a critical analysis of these issues and how they are addressed in current policies.
Justice had a brain tumor removed. now she has no vision in her left eye. her tumor was located in her right _____ lobe.
What is the best description of eukaryotes?
A. cells with membrane organelles
B. cannot make their own food from sun
C. complex composed of many cells
The best description of eukaryotes are cells with membrane organelles. Therefore, option A is correct.
What is eukaryote ?Any cell or creature with a distinct nucleus is said to be a eukaryote. The nucleus of a eukaryotic cell, which houses the well-defined chromosomes (bodies holding the genetic material), is surrounded by a nuclear membrane.
The nucleus is the distinguishing property between bacterial and eukaryotic cells. True nuclei are missing from prokaryotic cells, and only eukaryotic cells have membrane-bound organelles.
The word "eukaryote" is derived from the Greek words "eu," which means "well," and "karyon," which means "nut or kernel" and is a typical scientific word-forming component.
The DNA is found in the nucleus of eukaryotic cells, which are crucial since they are eukaryotes. In addition, they fight for nutrients and space on and within the body, which keeps disease-causing germs at bay.
Thus, option A is correct.
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Eukaryotes are organisms with cells that have a membrane-bound nucleus and other membrane-bound organelles. The correct description of eukaryotes is A.'cells with membrane organelles.'
Eukaryotes are organisms whose cells are organized into complex structures by internal membranes. The hallmark feature of eukaryotic cells is the presence of a membrane-bound nucleus, which contains the cell's DNA.
In addition to the nucleus, eukaryotic cells also contain other membrane-bound organelles, such as mitochondria, endoplasmic reticulum, and Golgi apparatus, each performing specialized functions.
The attribute that best describes eukaryotes among the given choices is A. cells with membrane organelles. This characteristic distinguishes them from prokaryotes, which lack such organized compartments.
Why do changes in temperature affect the microbial growth rate?
What are the five ways to prevent tooth decay and gum disease?
Pregnant client asks if there is any danger to the development of her fetus in the first few weeks of her pregnancy. how should the nurse respond?
The process of ________ refers to the sense organ changing physical energy into electrical signals that become neural impulses.
Which cloud would most likely produce drizzle?
The type of cloud that is most likely to produce drizzle is a stratus cloud, which is in Option A as stratus clouds are low-level clouds that typically form in stable, calm atmospheric conditions.
What are the types of clouds?These are generally uniform and featureless, with a flat base and a relatively low cloud ceiling, and often produce drizzle or light rain as they contain a high concentration of small water droplets that are not heavy enough to fall as larger raindrops. However, cumulus clouds, cumulus congestus clouds, cirrostratus clouds, and cumulonimbus clouds are all less likely to produce drizzle compared to stratus clouds, but cumulus clouds and cumulus congestus clouds are more commonly associated with the development of showers and thunderstorms.
Hence, stratus clouds are the type of cloud that is most likely to produce drizzle and are in Option A.
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The question is incomplete, the complete question is below,
Which cloud would most likely produce drizzle?
a. stratus
b. cumulus
c. cumulus congestus
d. cirrostratus
e. cumulonimbus
What molecular conformation (structure) of homologous chromosomes facilitates crossing over
Crossing over in homologous chromosomes is facilitated by a structure called the synaptonemal complex during prophase I of meiosis. It supports precise alignment of genes on the chromatids allowing exchange of chromosomal segments. This results in recombinant chromosomes with a mix of parental genes.
Explanation:The molecular conformation that facilitates crossing over in homologous chromosomes is known as the synaptonemal complex. This structure forms during early prophase I of meiosis. The homologous chromosomes pair tightly together, a process called synapsis, facilitated by a protein lattice structure - the synaptonemal complex, along with cohesin proteins at the centromere.
This allows precise alignment of the genes on the chromatids of the homologous chromosomes. Consequently, this alignment enables the exchange of chromosomal segments between homologous non-sister chromatids, a process known as crossing over. The point of contact and exchange, visible under a microscope, is termed chiasma.
Thus, crossing over results in recombinant chromosomes that have a mixture of maternal and paternal sequences of genes.
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When you work harder, your muscle cells work harder and increase in size. how might various organelles in a muscle cell increase in size, number, or activity to respond to the challenge of an increased workload?
Answer:
The muscle cells allow the body movement along with the skeletal system.
After physical exercise, the muscle cell adapts either by an increase in cell number, increasing the diameter of the fibre and the increase in the cytosolic organelles which can increase the efficiency of the muscle cells.
The cells grow in number and size by adding the myofibrils to the existing cells and by adding sarcomeres to increase their length.
The physiological response is elevated by increasing the number of energy-producing organelle in the cell called mitochondria which produce ATP in response to the physical exercise.
The part of the endocrine system that regulates the level of sugar in the blood is the _____.
Answer:
hypothalamus
Explanation:
What are the parts of a phospholipid molecule?
A) glycerol + two fatty acids + phosphate group
B) glycerol + three fatty acids
C) adenosine + three phosphate groups
D) ribose + phosphate group + nitrogen base
A glycerol + two fatty acids + phosphate group
What do you do if your results do not match your hypothesis for an experiment?
What is a macromolecule? Name four macromolecules present in all living things and identify what they have in common, in 2-3 sentences
Final answer:
A macromolecule is a large molecule essential for life, made up of smaller organic molecules. The four major types found in all living things are proteins, carbohydrates, lipids, and nucleic acids, each contributing to cell structure and function. They are organic and often contain elements like oxygen and nitrogen.
Explanation:
What is a Macromolecule?
A macromolecule is a very large molecule necessary for life, typically composed of thousands or more atoms, and created by polymerization of smaller subunits (monomers). There are four major classes of biological macromolecules present in all living things: proteins, carbohydrates, lipids, and nucleic acids. Each of these macromolecules plays a crucial role in the structure and function of cells. They are built from smaller organic molecules and perform a wide array of functions within organisms.
Common Characteristics:
All four types of macromolecules are organic, meaning they contain carbon atoms covalently bonded to hydrogen, and often include other elements such as oxygen, nitrogen, and phosphorus. Proteins function as molecular machines and structural components of cells, carbohydrates provide energy and structural support, lipids serve as building blocks of membranes and energy storage molecules, and nucleic acids (DNA and RNA) store and transmit genetic information.
In the context of the endocrine system, the _____ gland regulates all the other glands.
Are ladybugs herbivores carnivores or omnivores
How are the three major types of freshwater wetlands similar? How are they different?
The postictal phase of a tonic-clonic seizure involves the patient transitioning from full loss of consciousness to:
A granola bar wrapper claims that it has protein. You conduct hydrolysis of the granola bar with pepsin enzyme to digest protein and amylase enzyme to digest starch. After hydrolysis, you detect sugars but no amino acids. Did the granola bar contain proteins as claimed?
The presence of sugars and absence of amino acids in the hydrolyzed granola bar indicates that it contains starch but not proteins as claimed on the wrapper.
Explanation:Based on the experimental result from the hydrolysis of the granola bar, it can be concluded that the granola bar does not contain proteins as claimed on the wrapper. In your experiment, you used the pepsin enzyme to hydrolyze any protein that might be present in the granola bar. However, you did not detect any amino acids which are the building blocks of proteins. Instead, you detected sugars which could be the result of the action of amylase enzyme on starch contained in the granola bar. Therefore, the presence of sugars and the absence of amino acids indicates that the granola bar contained starch but no proteins as claimed.
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Which cellular organelle is involved in processing and packaging proteins that will be secreted (released) by the cell?
These are all highly contagious foodborne illnesses that result from biological contaminants, except:
a. salmonella
b. norovirus
c. influenza
d.
e. coli submit answer
In the following choices below, the correct answer of which corresponds to the statement of a highly contagious food borne illness that results from biological contaminants is letter a, salmonella. The salmonella are pathogens that are intracellular. The infection occurs because of the contamination of food with feces.
Answer:
the other dude is on crack and meant to say A samonlella
Explanation:
The stratospheric ozone layer is important to ecosystems because it ________.
The stratospheric ozone layer is essential to ecosystems because it absorbs the Sun's harmful ultraviolet radiation, blocking it from reaching the Earth's surface and causing grave effects on the biosphere. This layer is found in the upper atmosphere and is formed from ozone, a heavier form of oxygen. Over the past decades, human activities have been damaging this vital layer, but international actions have helped in its recovery.
Explanation:The stratospheric ozone layer is crucial to ecosystems as it primarily acts as a protective barrier, absorbing and blocking the Sun’s harmful ultraviolet (UV) radiation.
This layer is found at the top of the stratosphere, and it's composed of ozone (O3), which is a heavier form of oxygen due to its three atoms per molecule, unlike the typical oxygen with two atoms. When the ozone absorbs UV light from the Sun, not only does it prevent this dangerous radiation from reaching the Earth's surface, but the breakup of ozone also adds heat to the stratosphere, counteracting the decreasing temperature trend in the troposphere below.
Since the 1980s, human activities, especially the production of industrial chemicals such as chlorofluorocarbons (CFCs), were found to be damaging this vital ozone layer, leading to an alarming 'ozone hole' over the Antarctic. However, due to international actions to phase out CFCs, the stratospheric ozone layer is gradually recovering.
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Dark matter may explain ____.
Which shotgun choke is best for hunting a large, slow bird, such as a turkey?
The shot gun choke that is best and more suitable for hunting and catching a large and more slow bird such as an example of this is a turkey is a shot gun choke that is full, it is because this type will allow to catch the bird more faster and more easily.
The best shotgun choke for hunting a large, slow bird like a turkey is typically a full or extra-full choke. These chokes have a tight constriction, providing a narrow shot pattern ideal for clean, humane kills at moderate to long distances, especially when aiming for the head and neck area.
For hunting a large, slow bird such as a turkey, the best shotgun choke to use would typically be a full choke or an extra-full choke. These chokes have a tight constriction and produce a narrow, dense shot pattern, which is ideal for targeting the vital areas of larger birds at moderate to long distances.
Using a proper choke ensures that enough pellets hit the target to deliver a clean and humane kill. When hunting turkeys, it is important to aim for the head and neck area to preserve the quality of the meat.
Choosing the right choke also depends on the specific hunting conditions, such as the typical distance at which you expect to shoot and the load of the shotgun shells being used. Some hunters may prefer a slightly less constricted choke like a modified choke if they are taking closer shots, but generally, a full or extra-full choke is the common choice for turkey hunting.
Give an example of how applied science has had a direct effect on your daily life.
Answer: Medical microbiology
Explanation:
Applied science can be defined as engineering which leads to the development of the technology that helps the mankind with certain applications.
The medical microbiology is an example of applied science the microorganism are manipulated in such a way that it can be used in favor of humanities.
Final answer:
Applied science greatly affects daily life, especially evident in the development of vaccines that improve health standards globally and the technologies that enhance lifestyle and energy efficiency.
Explanation:
An example of how applied science has had a direct effect on our daily lives is through the development and use of vaccines. These medical preventatives, targeting diseases such as polio, measles, tetanus, and influenza, have significantly increased global health standards by controlling and eliminating life-threatening illnesses. When looking at personal experiences, one may recall a situation where a vaccine potentially prevented a serious illness, underscoring the importance of scientific research in health and medicine. Furthermore, applied science contributes to technological advancements that enhance everyday life, such as the creation of efficient wind turbines for clean energy derived from basic scientific knowledge about wind patterns and ecosystem dynamics.
In the study of human physiology why is it important to understand osmosis
The nurse is explaining possible side effects of corticosteroids to the caregiver of a child diagnosed with rheumatic fever. the caregiver comments, “i don't understand what hirsutism means.” the nurse would be correct in explaining that hirsutism is:
Name two elements that have properties similar to those of the element calcium
Answer:
Magnesium, strontium, and barium are a few of the elements similar to Calcium.
Explanation:
During an assessment of a patient who has been homeless for several years, the nurse notices that his tongue is magenta in color. this is an indication of:
The magenta color of the patient's tongue likely suggests a nutritional deficiency, specifically a vitamin B deficiency such as riboflavin (B2) and niacin (B3), often associated with the patient's homelessness and related health risks.
A magenta tongue in a patient, particularly one who has experienced homelessness, may suggest a nutritional deficiency, such as a vitamin B deficiency. This condition can be linked to poor diet and could lead to glossitis, which is inflammation of the tongue.
This inflammation, paired with a magenta color, suggests a deficiency of B vitamins like riboflavin (B2) and niacin (B3). The patient's socioeconomic status as indicated by long-term homelessness increases the likelihood of such deficiencies and related health issues.
Additionally, the description of the fingernails and toenails having a rosy tint and being slightly upturned could indicate chronic respiratory or cardiovascular conditions, which may be related to the diagnosis of Diseasitis. This confirms the nurse's observations and supports the need for further assessment and possibly a comprehensive treatment plan, including nutritional support.
Healthcare professionals should always consider the social determinants of health such as housing status when assessing patients; in this case, homelessness has significantly contributed to the patient’s overall health risks and needs to be factored into care planning.
The _______ is the region of your brain stem which controls involuntary muscles and activities like digestion, heart rate, and breathing.
A medical student makes a transverse cut of a cadaver's leg. The two resulting sections could be referred to as the
Answer:
Frontal and sagittal sections
Explanation: