Answer:
stem cells can eventually be used to replenish cells in the human body that have been lost to the disease.
Explanation:
Stem cells are undifferentiated and have the ability to limitlessly renew themselves.
Bacteria communicate and exchange genetic information through extensions of their cell walls called A) cilia. B) desmotids. Eliminate C) flagella. D) pili.
Answer: D - pili
bacteria communicate and exchange genetic information through extensions of their cell walls called 'pili'.
Explanation:
Pili are found in bacteria and archaea surfaces as thin, rigid, hair-like fiber made of protein. They aid attachment of various bacteria cells to surfaces and other cells.
Pili are antigenic. They act as binding site for other cells like viruses and bacteria cells.
When pilus of a bacterium binds another bacterium cell (recipient cell), the single strand DNA is transferred to the recipient cell. Among the types of pili, the conjugative pili are known for communication and exchange of genetic informations between bacteria cells. The conjugative pili are also known as 'sex pili'. Exchange of DNA occurs after attachment of the donor to the recipient. The donors (bacteria cells with conjugative pili) attach to the recipients (bacteria without conjugative pili), connecting cytoplasm of both cells and promoting exchange of genetic materials including transfer of pili to the recipient cell.
What abitotic factor was used to classify regions into plant hardiness zones?
The abiotic factor which was used to classify regions into plant hardiness zones is Temperature.
What are Abiotic factors?These are the non living component of the ecosystem and examples include water, temperature etc.
The average annual minimum winter temperature is what it taken into consideration when the zones are being classified with zone 1 being the coldest and zone 13 as the hottest.
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Final answer:
Temperature is the abiotic factor used to classify regions into plant hardiness zones. It's crucial for determining which plants can survive in those zones, influencing critical processes like seed dormancy and germination.
Explanation:
The abiotic factor used to classify regions into plant hardiness zones is temperature. Plant hardiness zones are defined based on the minimum temperatures that plants can tolerate. The classification helps gardeners and growers determine which plants are most likely to thrive at a location. The role of temperature as an abiotic factor is crucial for plant growth and survival, influencing processes such as seed dormancy and germination.
In studies like the one by Argyris et al. (2008), it was reported that genetic variation for lettuce seed thermoinhibition is associated with temperature-sensitive expression of abscisic acid and other hormones, which can directly affect seed germination rates. Supported by the research, it's suggested that plates with lower levels or absence of abscisic acid likely show the highest rate of germination since it is associated with the inhibition of radicle emergence.
All of the following are examples of limiting factors in an ecosystem except
Population density is not the example of limiting factor.
Limiting factor is the factor which restricts the growth and abundance of population of species. Limiting factors can be space, food, and water any of the factors if not available to an organism the organism may not survive, grow, and reproduce. This can lead to the reduction in the population of species. Limiting factor is independent of the population density of the species for example, earthquake or forest fire can affect the species in an ecosystem irrespective of the size of the population of species.Learn more about limiting factor:
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Which types of birth control prevent sperm from fertilizing an ovum after they have entered the reproductive tract?
Nucleic acids ___
-combine to form carbohydrates?
-store and transmit hereditary information?
- are made up of amino acids ?
- form polysaccharides ?
Nucleic acids store and transmit genetic information that you inherited from your parents.
B. -store and transmit hereditary information?
In the ongoing processes of photosynthesis, respiration, and decomposition in the ocean, all components are recycled except _________.
You can recognize the process of pinocytosis when _____. you can recognize the process of pinocytosis when _____. the cell is engulfing extracellular fluid a receptor protein is involved the cell is engulfing a large partic
Answer is “The cell is engulfing extracellular fluid”
Further explanation
Pinocytosis
Pinocytosis is a cell procedure by which liquids and supplements are ingested by cells. Additionally, it is called cell drinking, pinocytosis is a sort of endocytosis that includes the internal collapsing of the cell layer (plasma film) and the arrangement of layer bound, liquid-filled vesicles. These vesicles transport extracellular liquid and broke up particles (salts, sugars, and so forth.) crosswise over cells or store them in the cytoplasm.
When pinocytosis occurs?
It is started in the presence of wanted molecules in the extracellular liquid close to the cell surface. These particles may incorporate proteins, sugar atoms, and particles. Coming up next is a summed-up portrayal of the arrangement of occasions that happens during pinocytosis.
Step by step process of pinocytosis
The plasma membrane invaginates forming a cavity that loads up with extracellular liquid and disintegrated particles. The plasma membrane again folds on itself until the parts of the collapsed layer meet. This holds the liquid inside the vesicle. In certain cells, long channels likewise structure reaching out from the film profound into the cytoplasm. The fusion of the folded membrane cutoff the vesicle from the membrane, allowing the vesicle to drift towards the center of the cell. This vesicle fuse with lysosomes and discharge chemicals that tear vesicles and empty their substance into the cytoplasm to be used by the cell.Answer details
Subject: Biology
Level: High school
Key words
Pinocytosis When pinocytosis occurs? Step by step process of pinocytosisLearn more to evaluate
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When a tautomeric shift occurs, the resulting nulceotide is a(n) __________ of the nucleotide prior to the shift?
Describe the 5 types of species interactions
What problem does the chromosome number of various organisms present to evolutionists?
The body naturally experiences an increased metabolic rate the body naturally experiences an increased metabolic rate when we adopt a reduced-calorie diet. during pregnancy. as we age. during sleep.
Metabolic rate increases during pregnancy. Some women experience the first signs of pregnancy as early as two weeks after conception, while others begin to experience symptoms closer to four or five weeks later. Some women won't experience any signs of pregnancy until their period is significantly later or even later.
Within the first 15 weeks of pregnancy, metabolic rates significantly rise, peaking in the third trimester during the greatest growth phase. This expanded metabolic rate might put pregnant ladies at a higher gamble of hypoglycemia, or low glucose.
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An individual displaying a larger than normal number of ldl receptors is _____________ likely to develop atherosclerosis.
Having more LDL receptors than normal decreases the likelihood of developing atherosclerosis, as these receptors help clear LDL cholesterol from the bloodstream.
An individual displaying a larger than normal number of LDL receptors is less likely to develop atherosclerosis. LDL receptors on liver cells are crucial for removing low-density lipoprotein (LDL) cholesterol from the bloodstream. In conditions like familial hypercholesterolemia, individuals have mutations leading to fewer or malfunctioning LDL receptors, leading to dangerously high levels of LDL cholesterol and a higher risk for atherosclerosis. Conversely, more functional LDL receptors would enhance the clearance of LDL cholesterol from the blood, reducing the risk for atherosclerosis development.
when hooke first used the term cell did he intend to have it apply to living material
Yes, when Robert Hooke first used the term cell, he intended for it to be applied to living material as he was examining cork because it is derived from living plants.
When were the cells discovered?The advancements in the design of the microscope resulted in the discovery of cells. The scientist Robert Hooke was interested in learning about the microscopic world. This is why, he improved the design of the compound microscope that was already existing, in the year 1665.
His design of the microscope utilized three different kinds of lenses and a stage light which was used to illuminate and enlarge the specimens. All these advancements allowed Hooke to see something so wonderful when he placed a slice of the cork under his advanced microscope.
His observations of this tiny and previously unseen world are recorded in his book named Micrographia. For him, the cork appeared as if it was made of tiny pores, which he called “cells” as these reminded him of the tiny rooms or cells in a monastery.
Therefore, when Robert Hooke first used the term cell, he intended for it to be applied to living material as he was examining cork because it is derived from living plants.
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Name the 4 main atmospheric factors that influence weather?
Sunlight, wind, humidity, and temperature are the four atmospheric factors that can influence weather.
Weather can be defined as the state of the atmosphere in accordance with the heat or coldness, dryness, or cloudiness. The state of weather is influenced by the four atmospheric factors that are sunlight, wind, humidity, and temperature. Sunlight is the key component of the atmosphere which affects the state of the weather. The region which receives low sunlight is colder and the region which receives more sunlight is hotter and can be in the form of desert. The wind takes away the moisture in the air away from a region to another region. Humidity can be defined as the moisture content in the air. It is responsible for bringing rain in the region. Temperature is influenced by the sunlight, higher rate of evaporation of water, and others. The region which receives more sunlight is expected to have higher temperature over the region which receive low sunlight.Hence, sunlight, wind, humidity, and temperature are the four atmospheric factors that can influence weather.
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The third level of cell organization is the _____.
A. tissue level
B. system level
C. organism level
D. organ level
The boundary where fresh water feeds into salt water is called a(n) _____.
Estuary is a partly enclosed coastal body of water by which river water is mixed with seawater. In a broad sense, the estuarine setting is defined by salinity boundaries instead of geographic boundaries. The word estuary is derived from the Latin words aestus (“the tide”) and aestuo (“boil”), signifying the effect produced when tidal flow and river flow meet.
All organisms contain DNA and RNA. What are the subunits of DNA and RNA? A carbohydrates B simple sugars C nucleotides D amino acids
Answer:
The answer is: C nucleotides.
Explanation:
The letters are A, C, G, and T, which symbolize the four nucleotide subunits of a DNA-adenine, cytosine, guanine, thymine band, which are covalently linked bases to phosphoric chains.
The answer is: C nucleotides.
Two natural plant products, vinblastine from the rosy periwinkle and paclitaxel (taxol) from the pacific yew, have been used successfully in the treatment of a wide range of cancers. these chemicals work by interfering with mitosis but by different methods. vinblastine inhibits mitosis by preventing the assembly of the spindle. paclitaxel promotes microtubule synthesis and binds to the microtubules preventing the depolymerization (disassembly) of the spindle during mitosis. based on your knowledge of mitosis, at what phase do you expect cell division to be interrupted by each of these cancer fighting compounds? explain your answer based on the activities occurring at mitotic stages.
The nurse is preparing to administer a trivalent influenza vaccine (tiv) to a 70-year-old patient with chronic obstructive pulmonary disease (copd). while reviewing the patient's immunization record, the nurse notes that the patient received a pneumococcal polysaccharide vaccine (ppv23) 10 years prior. which action does the nurse take?
What hormone causes breast development and production of milk?
In terms of processing in the nervous system, explain why your reaction time was most likely faster for the simple reaction task than for any of the discrimination tasks.
Reaction time is faster for the simple reaction task than for discrimination tasks because simple reactions involve fewer processing steps. Discrimination tasks require additional cognitive effort and involve analyzing multiple stimuli before generating a response.
Explanation:Your reaction time was most likely faster for the simple reaction task than for any of the discrimination tasks because processing in the nervous system for simple reactions involves fewer steps. In a simple reaction task, you only need to respond to a single stimulus with a single response. This means that the sensory information from the stimulus goes directly to the motor system, resulting in a faster reaction time.
On the other hand, discrimination tasks involve additional processing steps. In these tasks, you need to analyze and interpret multiple stimuli before generating a response. This requires more cognitive effort and involves the integration of sensory information, memory, and decision-making processes. As a result, the reaction time for discrimination tasks is typically longer compared to simple reaction tasks.
For example, if you are asked to press a button only when a red stimulus appears, you have to first identify the color of the stimulus, compare it to your selection criteria, and then produce the appropriate response. This additional processing time contributes to the slower reaction time for discrimination tasks.
Prenatally, how many nerve cells were formed in your brain per minute?
in the chain, which data show a possible source of error Tyr-Leu-Pro-Met
The position of Met seems incorrect.
The amino acid sequences of all proteins begin with Met because it is the amino acid that is attached to the anticodon for the AUG start codon.
It looks like the student might have worked in a backward direction for transcription.
To provide oxygen to the cells and remove carbon dioxide is the purpose of what anatomical system?
The exchange of gaseous is done by the respiratory system, it provides oxygen to the cells and removes carbon dioxide.
What is the respiratory system?The respiratory system is an organ system that has two pairs of lungs and is surrounded by intercostal muscles. Both lungs exchange gases from cells.
The air breathes into the lungs by a nasal passage in the nose and also breathes out through it. Inhalation and exhalation are done by creating pressure against atmospheric pressure.
Gases travel through the nasal passage and to the bronchi, which further extended into bronchioles where actual oxygen and carbon dioxide exchange takes place.
Therefore respiratory is an anatomical system for the purpose to provide oxygen to cells and remove carbon dioxide from them.
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CaCO3 is an example of which type of material?
Select one:
a. mixture
b. colloid
c. compound
d. element
Availability of substitutes plays a role in determining the bargaining power of suppliers.
a. True
b. False
When does the movement of materials in and out of the cell not require energy?
sickle cell anemia is a disease that is caused by a change in the gene sequence by what
According to a united nations university report, 62% of all ____ drugs have been derived from the discoveries of medicinal plants.
Explain why we can infer that the universal common ancestor of all life on earth was unicellular heterotrophic
Final answer:
The Last Universal Common Ancestor (LUCA) is believed to be unicellular and heterotrophic because all life shares a universal genetic code and because early life forms, like archaeons, appear to have obtained energy from organic compounds in the environment. Limited molecular synthesis capabilities imply reliance on absorption, consistent with heterotrophic behavior. Despite some debate, the prevalence of heterotrophs over autotrophs in early earth conditions seems evident.
Explanation:
Universal Common Ancestor: Unicellular Heterotrophic Origins
We can infer that the universal common ancestor of all life on Earth, referred to as the Last Universal Common Ancestor or LUCA, was unicellular and heterotrophic based on shared characteristics of all cells. One key aspect that points to a common ancestor is the universal genetic code used by all known forms of life. This genetic code is vital for storing life's information and for retrieving the encoded information. Alongside genetic commonalities, cells, including those of bacteria, archaea, and eukaryotes, share the use of ribosomes for protein synthesis.
Early on, it is believed that primitive organisms, such as archaeons which are considered predecessors of bacteria and eukaryotes, were mostly heterotrophic. These organisms had limited capabilities to synthesize molecules and relied on absorbing substances from their surroundings. Their metabolism derived energy from organic compounds present in the environment rather than producing organic molecules on their own (autotrophs).
Scientific studies, including DNA sequencing, suggest that these early life forms engaged in processes similar to glycolysis, using environmental nutrients for energy, suggesting that the first cells were likely heterotrophs. In addition, the existence of early autotrophic life is a matter of debate, with recent discoveries pointing towards the Earth having a non-reducing atmosphere, which may have favored the appearance of autotrophs at thermal vents. However, many aspects regarding the composition of the prebiotic atmosphere and the conditions for life's origins are still contested.
It is generally agreed that only one ancestral heterotrophic species prevailed, giving rise to all cellular life following the evolutionary roadmap. This conclusion is bolstered by the shared cellular characteristics seen across diverse life forms, suggesting that they all diverged from a common heterotrophic ancestor - the LUCA.