A microbe reproduces by binary fission every 20 minutes under favorable conditions. if you started with one cell, how long would 10 generations take and how many bacteria would be present if all the conditions were just right
In 20 minutes, a single bacterial cell divides in to two. If the conditions are optimal, for 10 generations of a bacterial cell, it will require 3 hours and 20 minutes to produce 1,024 copies of a bacterial cell.
Choose all the answers that apply. The mantle _____. is the thinnest layer is the thickest layer is the hottest layer is made of solid rock sometimes breaks through the crust
The Earth comprises of a series of layers, that is, the crust, the mantle, the outer core, and the inner core.
The crust floats on a layer of semi-molten rocks known as the mantle. The mantle is the thickest layer of Earth, that is, of about 3000 kilometers and comprises of semi-molten rocks. In the mantle, the molten rock is known as magma.
Thus, mantle is the thickest layer of the Earth.
1-A species of marine snails have either solid or striped shells. Scientists found that 57 percent of the snail population was striped, and 33 percent was solid. Sea birds are the main predator and when scientists studied their diet, they found that the birds ate more striped snails than solid snails. What could scientists conclude about the snails?
Birds preferred the solid snails. Rates of predation determine shell pattern. The shell pattern is due only to environmental variation. There may be other factors in the ecosystem that favor striped snails. Question 4(Multiple Choice Worth 3 points)
2- In 1989, the Exxon Valdez spilled nearly 42,000,000 liters of oil into Prince William Sound, Alaska. How would this spill be classified? Abiotic environmental Biotic environmental Genetic Pathogenic
Answer:
1. The correct answer would be "There may be other factors in the ecosystem that favor striped snails".
Solid snails are less hunted by sea birds as compared to the stripped snails. Therefore, we can conclude that the solid snail provides some kind of survival advantage to the population.
However, the percentage of solid snails as low as 33 percent. Thus, there must be some other environmental factors which favor the high percentage of striped snails.
2. The correct answer would be abiotic environmental.
In ecology, the abiotic component refers to the non-living component of the environment. For example, air, water, mountains, soil, minerals et cetera.
Similarly, oil being a chemical is a non-living thing.
Thus, it is an abiotic environmental factor.
Final answer:
Scientists might conclude that other factors in the ecosystem favor striped snails beyond merely predatory patterns, such as camouflage adaptation. The Exxon Valdez oil spill is classified as an abiotic environmental disaster.
Explanation:
Given the information that 57 percent of the snail population was striped and 33 percent was solid, and considering that sea birds ate more striped snails than solid, one could conclude there may be other factors in the ecosystem that favor striped snails. Since birds eat more striped snails despite their prevalence, it implies the birds do not prefer one type over the other based on appearance alone. Therefore, the pattern of predation does not seem to be the sole factor determining the shell pattern of these snails. Factors such as camouflage may play a role as indicated by research suggesting that snails with certain colorations may be better adapted to their native regions, possibly to avoid predation effectively.
Regarding the Exxon Valdez oil spill in 1989, since it was an oil spill, it would be classified as an abiotic environmental disaster. This term is used to describe a non-living chemical or physical factor in the environment that has a significant impact on living organisms and the ecosystem.
What types of minerals are among the most widely used in the world?
A. Metals
B. Alloys
C. Gemstones
D. Nonmetals
Final answer:
The most widely used minerals in the world are metals, like iron and aluminum, and nonmetals used in industry. Silicates are the most abundant mineral family, and metamorphic rocks form from sedimentary or igneous rocks. Gemstones and alloys are also valuable, but not as widely used as pure metals. So the correct answer is option A.
Explanation:
Among the most widely used minerals in the world are metals and to a lesser extent, nonmetals. Metals, such as iron, aluminum, and copper, are essential due to their electrical and thermal conductivity, malleability, ductility, and opacity. They are foundational in a vast number of industries, ranging from construction to electronics. Aluminum, for example, is used in various forms, from construction materials to packaging like aluminum foil. Meanwhile, nonmetallic minerals have a crucial industrial role as well, being used for chemicals, building materials, fertilizers, and abrasives.
The most abundant mineral family is the silicates, which form a significant component of the Earth's crust. Metamorphic rocks can form from both igneous and sedimentary rocks, under conditions of high pressure and temperature.
Minerals such as gemstones like diamonds and rubies, while being widely appreciated for their beauty and use in jewelry, are not among the most used materials industrially. Similarly, alloys, which are mixtures containing at least one metal, are very important in manufacturing but are a secondary category compared to pure metals.
How is the small intestine adapted for the absorption of nutrients?
If the light colored moths were better adapted to the light colored trunks of the trees, why were dark colored moths still present in the population of biston betularia prior to 1845?
A child has been diagnosed with hemophilia type a after experiencing excessive bleeding from a minor trauma. the mother shares that she is 4 weeks pregnant and questions as to whether this pregnancy will result in a child with hemophilia. what is the best response by the nurse?
Devise a logical argument for why it is beneficial to use names for hurricanes over latitude longitude identification methods
Cracks in a rock from exposure to pressure are an example of
Resistance exercises stress what aspect of the body?
Match the correct characteristic with each term
algae [i think B]
spore [i think C]
ciliate [i think D)
protozoan [i think A]
a. multicellular and unicellular photosynthetic protists
b. an animal-like protist
c. a reproductive cell that can produce a new organism without fertilization
d. a protozoan that moves by beating hair like parts that cover its cell
i am not a genius, i am a high school idiot please dont judge me if i am wrong. no one is perfect.
A client diagnosed with human immunodeficiency virus (hiv) infection states, "i'm afraid of gaining weight, so i always supplement my diet with vitamins." which response by the nurse is appropriate?
Energy plus matter is sufficient for continued development of order, complexity or growth.
a. True
b. False
SOS:
This answer is FALSE!!!
Hope this helps!!
Dinoflagellates literally means _____.
What is the action of the binding of muscarine to its receptors in the digestive system?
When you swallow food, a flap of tissue called the ________________________ seals off your windpipe?
What are the job prospects for students with either a bachelor’s degree, master’s degree, or a doctoral degree in psychology? (
Psychology graduates can pursue a wide range of careers based on their highest degree attained. Bachelor's graduates often work in human resources or education, master's graduates can become therapists and school psychologists, and doctoral graduates can enter academia, research, and clinical practice.
Explanation:Job Prospects for Psychology Graduates at Different Degree Levels:
The job prospects for students with a degree in psychology vary depending on the level of education attained. Bachelor's degree holders can find careers as case managers, sales representatives, human resource personnel, and high school teachers, contributing to fields such as healthcare where knowledge of psychology is beneficial. With a master's degree, careers expand to include professional counselors, school psychologists, sport psychology consultants, and industrial organizational consultants. Students interested in a career in academia or in becoming practicing clinical psychologists should consider pursuing a doctoral degree, either a PhD for research-focused roles or a PsyD for clinical practice. A PhD opens doors to careers in academia, research, legal consultancy as forensic psychologists, or working in pharmaceutical companies as biopsychologists, among others. Those with a master's qualification can also teach at community colleges, while a doctorate is preferred for tenure-track positions at 4-year institutions.
Postdoctoral training programs are common for recent PhD graduates looking to develop their research skills and prepare for academic or specialized professional careers. Each degree level in psychology also lends itself to different opportunities beyond the traditional paths; for example, psychology undergraduates can leverage their education in becoming psychiatric social workers or nurses.
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What is the main difference in purpose between the mitosis and meiosis
Answer:
Meiosis involves two divisions of the nucleus, while mitosis involves only one. Meiosis produces four sex cells that are haploid, meaning they have half the number of chromosomes. Mitosis, on the other hand, produces two cells that are identical to the original cell. These cells are diploid, meaning they have pairs of chromosomes.
Explanation:
In a plant cell, where are the atp synthase complexes located? select one:
a. thylakoid membrane only
b. thylakoid membrane and plasma membrane
c. inner mitochondrial membrane only
d. thylakoid membrane and inner mitochondrial membrane
ATP synthase complexes are located in both the Thylakoid membrane and Inner mitochondrial membrane of a plant cell, playing pivotal roles in energy generation via photosynthesis and oxidative phosphorylation respectively.
Explanation:In a plant cell, the ATP synthase complexes are located in the Thylakoid membrane and the Inner mitochondrial membrane. These are structures within the cell that are involved in energy production. The Thylakoid membrane is found within the chloroplasts and is involved in the photosynthesis process, specifically in light-dependent reactions where ATP (energy) is produced. On the other hand, the Inner mitochondrial membrane is the site of oxidative phosphorylation in which ATP synthase plays a major role.
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Which immunoglobulin class has a dimeric structure with a secretory component? igm iga ige igg?
What is the rationale for administration of ranitidine to a patient who is experiencing acute adrenal insufficiency?
What are the roles of mucus? Check all that apply.
A)to trap pathogens
B)to start fevers
C)to prevent pathogens from moving into deep tissues
D)to stimulate B-cells to make antibodies
E)to identify antigens
Answer:
A, C
Explanation:
mucus acts as a barrier! all of the other things mentioned (D and E) are caused by white blood cells.
The role of mucus is to trap pathogens and to prevent pathogens from moving into deep tissues. So, the correct options are A and C.
What is Mucus?When we're sick or feel like we have too much mucus, also known as snot, it might be bothersome, but the body needs it to keep healthy. Our lungs, throat, mouth, nose, and sinuses are lined with mucus, which is a sticky, gelatinous substance.
Its primary purpose is to trap germs, viruses, or allergens such dust or pollen in your nose and stop them from spreading throughout your body and making you sick. It is produced via membranes inside the nose and sinuses. The mucus will eventually move to the stomachs and leave the body, along with the chemicals it has caught. The role of mucus is to trap pathogens and to prevent pathogens from moving into deep tissues.
Therefore, the correct options are A and C.
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Which domain of life seems to be absent for deep-subsurface communities?
Answer:
Life consists of three domains bacteria, archaea, and eukaryotes. Bacteria and archaea are the two domains which can be found everywhere on the earth. Organisms from these two domains can be found in extreme conditions where eukaryotes cannot survive. These organisms are called extremophiles.
Deep subsurface has some extreme environment like high temperature and pressure where survival of eukaryotes is not possible but organisms from domain archaea and bacteria can flourish there.
These microorganisms have evolved some mechanism like special enzymes and protecting capsules which protect them in extreme climate of deep subsurface.
Therefore the domain of life seems to be absent for deep-subsurface communities is eukarya.
How could a diuretic reduce water reabsorption in the kidneys?
Inhibit ADH release
Stimulate excessive ADH release (I put)
Stimulate excessive thirst response
Inhibit thirst response
@carsonsi @luckycoins888,
Answer:
The correct answer will be option-Inhibit ADH release.
Explanation:
Diuretics are the substance usually drugs which helps in the diuresis or the production of more urine with a high amount of water and sodium ions. These diuretics are used in the clinical department to treat blood pressure.
The diuretics act by inhibiting the release of the vasopressin or anti-diuretic hormone (ADH) which helps in reabsorption of sodium and water from the urine. Since no ADH is released in the body, more water is released with the urine.
Thus, option-Inhibit ADH release is the correct answer.
Compare and contrast passive transport with active transport
The terminal electron acceptor in aerobic respiration is water, which is broken down to hydrogen and oxygen.
a. True
b. False
Final answer:
The statement is false; oxygen, not water, is the terminal electron acceptor in aerobic respiration, where it combines with protons and electrons to form water.
Explanation:
The statement that the terminal electron acceptor in aerobic respiration is water, which is broken down to hydrogen and oxygen, is false. In aerobic respiration, the final electron acceptor at the end of the electron transport chain is an oxygen molecule, O₂. When oxygen accepts electrons, it also combines with protons (hydrogen ions, H+) from the surrounding medium to form water (H₂O). This step is vital for the production of ATP, the energy currency of the cell. If oxygen is not available, aerobic respiration cannot occur, and cells may switch to anaerobic processes such as fermentation to regenerate NAD+ from NADH.
Name and describe a predator-prey relationship in the Coral Reefs.
Not in a specific Coral Reef it can be any
One prey-predator relationship in the reef is the eel-shrimp relationship. The eel predates on shrimps, crabs and small fishes. The eel hides and awaits its prey in the crevices of the coral reefs. They only emerge from the crevices in the night to hunt shrimps and other prey.
When the oxyhemoglobin curve shifts during exercise what is the result?
What is the limiting factor for the growth of trees in the tundra? question 1 options:
a.permafrost
b.low precipitation
c.insufficient minerals in bedrock
d.ph of soils
e.lack of sunlight?
which emotion has been particularly implicated in coronary heart disease?
a. hostility
b. sadness