Answer:
The amount of water in the beakers
Explanation:
The Cell Homeostasis Virtual Lab is an online experiment that illustrates the principles of homeostasis, osmosis and diffusion.The materials consist of beakers, dialysis tubing, sugar and water.The experiment measures the change in the mass of a solution at varying concentrations of sugar.The experiment demonstrates diffusion of sugar molecules through the dialysis tubing into the water-sugar solution.The change in the sugar concentration is the independent variable as it changes and in turn effects the dependent variable.The response or dependent variable, in this experiment, is the mass of the solution.The amount of water in the beakers does not change. Therefore, in this experiment, it is a constant value.The variables that are constant in the cell homeostasis virtual lab will be:
The amount of time the dialysis tubes were soaked.The amount of water in the beakers.The type of solute.Homeostasis simply means the state of steady internal, chemical, and physical conditions that are maintained by living systems.
Homeostasis is the condition of optimal functioning for an organism such as the body temperature and fluid balance.
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How is dna molecule replicated
Answer:
"During DNA replication, the DNA molecule separates into two strands, and then produces two new complementary strands following the rules of base pairing. Each case strand of the double helix of DNA serves as a template, or model, for the new strand."
Explanation:
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Why are estuaries, such as the Pamlico Estuary, so important?
Answer:
An estuary can be described as an area of brackish water where different rivers or streams meet the open sea. Hence, an estuary forms a transition zone between an river environment and a marine environment.
Estuaries hold a lot of importance and are referred to as the nurseries of the sea. The estuary are home to many unique kinds of organisms. Certain kinds of fishes and shellfishes which humans consume cone from this area of the sea. There are high levels of nutrients moving in the estuary zone of the sea. Due to its shallow water, Pamlico estuary provides opportunities for fishing, crabbing and water- sports activities.
Estuaries like the Pamlico Estuary are crucial due to their commercial and biological significance.
Estuaries, such as the Pamlico Estuary, play a significant role both commercially and biologically.
They are home to many of the world's metropolitan areas, serving as ports for industrial activity and supporting large human populations.Biologically, estuaries are incredibly important because they act as nursery grounds for many species of fish, birds, and invertebrates. The mixing of fresh and salt water in estuaries creates a brackish environment that is rich in nutrients, promoting biodiversity and sustaining various life forms.Salinity in estuaries varies with the influx of seawater and outflow of freshwater, which influences the types of organisms and their adaptations. Many species in estuaries have developed specialized adaptations to cope with these varying salinity levels.Furthermore, estuaries contribute to the economy by providing areas for industrial activities and ports. These areas also offer recreational opportunities and help in filtering pollutants from rivers before they reach the ocean, thus maintaining environmental health.Which of the following types of solutions should be used when preparing a wet mount? (Circle one.) a. hypertonic b.hypotonic c.isotonic
The solution of wet mount should be hypertonic solution.
Explanation:Wet mount is a preparation where the specimen is made to place in a glass slide and a drop of solution is put on the slide. The wet mount is primarily used to see vaginal swab, bacterial slides etc.
Here the wet mount uses a hypertonic solution which is primarily 30 to 40% salt solution in distilled water. The function of this solution is to draw water from the cells and to keep them dehydrated.
The dehydration of the cells maintain their shape, and help to keep any stain if provided. So wet mount uses a hypertonic solution.
True or false: even when your research does not support your hypothesis, the hypothesis has value.
Answer:
True
Explanation:
Choose two of the early cell formation hypotheses and discuss their differences:
The two different hypotheses of the origin of early cell structure are the iron-sulfide bubbles hypothesis and the lipid membrane hypothesis
Explanation:
The iron-sulfide bubbles hypothesis by William Martin and Micheal Russel originated from small-sized compartments formed with iron sulfide bubbles which were lying on the ocean floor. These compartments had organic matter trapped inside them and which developed further and started to be bounded by their own cell membrane.
The lipid membrane hypothesis by Harold Morowitz proved that liposomes with the double lipid membrane formed organic material and could be separated from the environment. This theory stated that the cells were formed by the surrounding organic molecules .
The "heterotrophic origin" posits cells relied on external organic molecules, while the "autotrophic origin" suggests cells synthesized their own from inorganic sources.
Two early hypotheses regarding the formation of cells are the "heterotrophic origin" and the "autotrophic origin."
1. **Heterotrophic Origin**: This hypothesis suggests that the first cells were heterotrophic, meaning they relied on pre-existing organic molecules for energy and carbon sources.
According to this theory, these primitive cells may have formed in environments rich in organic compounds, such as primordial soups or deep-sea hydrothermal vents.
The cells absorbed nutrients from their surroundings, gradually evolving mechanisms to harness energy from available organic molecules. The key point here is that these early cells did not produce their own organic molecules but relied on external sources.
2. **Autotrophic Origin**: In contrast, the autotrophic origin hypothesis proposes that the first cells were autotrophic, meaning they could synthesize their own organic molecules from inorganic sources, such as carbon dioxide.
These early cells might have utilized energy from sources like sunlight or chemical reactions to drive the synthesis of complex organic compounds. Unlike heterotrophic cells, autotrophic cells could produce their own energy and carbon-containing molecules independently of external sources.
The main difference between these hypotheses lies in how they suggest early cells obtained organic molecules: heterotrophic cells absorbed them from the environment, while autotrophic cells synthesized them internally.
When astronauts sleep in space, they sleep in small cabins or in sleeping bags that are attached to the wall of the station.
Which condition requires them to attach their sleeping bags to the wall?
Answer:
Low gravity
Explanation: i would assume? :)
Answer:the answer is FREE FALL
Explanation:
Just answered it
What covers the ends of bones in adults?
A blood
B cartilage
C marrow
D ligaments
Answer: cartilage
Explanation: Cartilage is a type of connective tissue, tough and flexible that serves as a protection to the ends of the bones and allows them to move. Cartilage is made up of a dense network of collagen fibres in a gelatinous substances. There are three main types of cartilage: hyaline cartilage, elastic cartilage and fibrocartilage.
How does energy get transferred from the Sun to a cow?
Answer:the sun provides food for he cow because it makes food grow
Explanation:
Active transport requires energy because it usually involves the movement of
A.
substances from an area of low concentration to an area of high concentration.
B.
substances from an area of high concentration to an area of low concentration.
C.
substances in the gas phase, such as oxygen and carbon dioxide.
D.
substances that can easily pass through the cell membrane, such as water.
Active transport requires energy because it usually involves the movement of substances from an area of low concentration to an area of high concentration.
What is active transport?Active transport is the movement of a substance into or out of the cell. The movement is against the concentration gradient, and the movement is from lower concentration to higher concentration.
Example is diffusion.
Thus, the correct option is A.
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What is malaria ?❤️♀️
fever caused by a protozoan parasite that invades the red blood cells.
Answer:
a tropical disease caused by a parasite
Explanation: it it a mosiqto bite from tropical islands
How have modern advancements allowed this modern-day scientist to do research in a way that Darwin couldn't?
Answer: unlike modern-day evolutionary geneticists, Darwin did not have the knowledge of modern-day genetics or the ability to sequence the genome. So, Darwin couldn’t have determined that the trait of flightless wings was likely caused by a genetic mutation.
Explanation:
Answer:
Unlike modern-day evolutionary geneticists, Darwin did not have the knowledge of modern-day genetics or the ability to sequence the genome. So, Darwin couldn’t have determined that the trait of flightless wings was likely caused by a genetic mutation.
Explanation:
Answer from PLATO
The images show two species of tree frogs in a particular region.
The gray tree frogs are adapted to the trees of the woodlands, while the green tree frogs can survive in woodlands or grasslands. The gray frog was abundant in the woodlands. Because of climatic changes, most of the trees in the region died, and the woodlands changed to grasslands. In such a case, the .
The gray tree frog is closely related to the green tree frog genetically, but they have different mating calls. This suggests that specia
Answer:
Is adapting a new climate change
Explanation:
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Answer:
The gray tree frogs are adapted to the trees of the woodlands, while the green tree frogs can survive in woodlands or grasslands. The gray frog was abundant in the woodlands. Because of climatic changes, most of the trees in the region died, and the woodlands changed to grasslands. In such a case, the population of gray tree frogs will likely decrease .The gray tree frog is closely related to the green tree frog genetically, but they have different mating calls. This suggests that speciation occurred because of prezygotic isolation
Explanation:
The terrain is changing to a point in which it would be unsuitable for grey tree frogs and highly suitable for green tree frogs.
Prezygotic isolation prevents the fertilization of eggs. If the two frogs have different mating calls then they won't mate with eachother.
Sierra decides to write down everything she likes to eat. Then, she draws branches under each animal on the list and writes everything they like to eat, and so on until she is down to all plants at the bottom of the page. What did Sierra make a diagram of?
Which equation best represents the process of photosynthesis
Evaluate several popular movies and books involve mutated organisms. Are these transgenic organisms a possibility why or why not?
Movies like GMO OMG, species and X-men usually involves mutated organisms as their main subject. These transgenic organisms can possibly be created but certain of their species is banned considering the controversy that will create.
Explanation:
Mutated organisms are nothing but genetically modified organisms that will be developed by altering or modifying the genome of plants and animals through some breeding techniques that are followed traditionally for many number of years.They involve artificially selecting specific traits which results in the formation of a new organism.This concept is well used and explained in many of the movies, books etc.They are some possible in the modern world and an example for scientifically created mutated organism is the hairless cat.Though they are possible practically,they are not often preferred considering the controversy and risk such as Reducing the metabolism of the actual organism and their growth rate. Thus they are possible but are not preferred.Which of the following Gametes can be formed from the following genotype: TtYy.
A. YY
B. tY
C. ty
D. TY
E. Ty
F. Tt
Gametes can be formed from the following genotype: TtYy are
B. tY
C. ty
D. TY
E. Ty
Explanation:
The gametes are formed by meiosis of the cell.
The cell with genotype TtYy will form four different types of gametes.
The cross is shown in the diagram attached.
The alleles of TtYy separates and form gametes by all possible combinations.
Four types of gametes formed by TtYy are - tY, ty, TY, Ty
How might advancements in genetics and DNA affect an agriscientist’s career?
Final answer:
Advancements in genetics and genomics are revolutionizing agriscientists' work by allowing for the development of crops with enhanced qualities, such as drought tolerance and pest resistance, thereby improving the quality and quantity of crop yields.
Explanation:
Advancements in genetics and DNA technology have a significant impact on the career of an agriscientist. These advancements, particularly in the area of genomics, can considerably reduce the trials and errors in agricultural research. This has implications for improving the quality and quantity of crop yields through the development of genetically modified organisms (GMOs), by linking specific traits to genes or gene signatures. Agriscientists use genomic data to identify desirable traits and then transfer these traits to other organisms to create hybrids with superior qualities. This can lead to the creation of crops with enhanced characteristics such as increased resilience to drought conditions, resistance to pests, or improved nutritional content.
Furthermore, the application of genomics in agriculture allows for more efficient crop breeding, thereby accelerating the development of varieties with the most desirable features. Scientists are discovering new ways genomics can enhance agricultural production, from creating products that can withstand challenging environmental conditions to increasing the nutritional value of the crops. As such, agriscientists who are skilled in genomics and genetic engineering are crucial for driving innovations in crop improvement, ensuring sustainable agricultural practices, and meeting the food demands of a growing global population.
What are the roles of producers consumer, and decomposers in an ecosystem
Answer:
Producers Create Energy for the Consumers
Consumers "Use" or Consume Things of the environment
Decomposes eat or destroy the dead consumers and producers to help the environment grow
Answer:
thank youu!
Explanation:
the following is an example of an indirect observation?
A.
using tools such as a thermometer or rain gauge to take measurements
B.
counting rings on a tree stump to determine its age
C.
counting the number of bald eagles that land near a river
D.
using a live video to observe nesting owls
All of the following statements were part of the original cell theory proposed by Schleiden and Schwann, and many others including Remak and Virchow, with the EXCEPTION of
A) all cells come from other cells.
B) the cell is the most basic unit of life.
C) all living things are composed of one or more cells.
D) viruses are not living since they are smaller than a cell.
Answer:
viruses are not living since they are smaller than a cell.
Explanation:
Have a good day :)
The viruses are not living as they are smaller than a cell. Thus the option D is correct.
What is the cell theory of schledien and Schwann?The botanist and zoologists were studying tissues and proposed a theory that states that living things are made up of one or more cells and they are a basic unit of life. The new cells grow from the existing ones.
They gave the theory in 1838 on the basis of a comparison of plants and animal cells. The virus don't have cells that are larger enough and hence they are not living.
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What was first responsible for changing the formerly poisonous atmosphere to an oxygen-rich atmosphere, as we have today?
Answer:
"Photosynethic bacteria (Cyanobacteria)" was first responsible for changing the formerly poisonous atmosphere to an oxygen-rich atmosphere, as we have today
Explanation:
The cyanobacteria are photosynthetic bacteria that are oxygenic. They extract energy from the sun, take up carbon dioxide and release oxygen. Unlike plants and algae, cyanobacteria comprise chlorophyll, and by carbon fixation transform carbon dioxide into sugar.
Cyanobacteria are prokaryotic species, unlike eukaryotic plants and algae. A phylum composed of free-living bacteria and endosymbiotic plastids (a Gloeomargarita sister group found in certain eukaryotes) is called as Cyanophyta or Cyanobacteria. These also contain multiple yellowish carotenoids, the blue phycobilin pigment and, in certain organisms, the red phycoerythrin pigment.
Which sentence best explains the ideas of the comm with respect to human population growth? A. Each birth adds another person to the population
Complete Question:
Which sentence best explains the idea of the tragedy of the commons with respect to human population growth?
A. Each person overuses air, water, land, and food resources.
B. Each birth adds another person to the population.
C. People have more in common than they realize.
D. People cannot help but be guided by the interests of the group.
Answer:
"Each person overuses air, water, land, and food resources" best explains the ideas of the tragedy of the commons with respect to human population growth.
Explanation:
In short, human rationality and collective rationality are at odds with each other and inconsistent within the tragedy of the commons. In the foreground, Hardin characterizes the population problem as a Commons tragedy since the Earth is finite and therefore can not continue to cater the growing human population.
A service must be scarce, rival in use, and non-exclusive for a Commons catastrophe to occur. Alternatives to commons catastrophe include enforcing individual liberties, controlling policy, or creating a collective action system.
Final answer:
Population growth is affected by births, deaths, and migration, not just new births. Some countries do have negative growth rates, and the current global population is around 7 billion, reached between 2011 and 2012.
Explanation:
No, new births are not solely responsible for the increase in population size. Population growth is influenced by several factors, including fertility, mortality, and migration. Other types of data that would help determine the reasons for this increase in population size include death rates, migration statistics, and age demographics, which provide insight into the mortality and movement patterns that also affect population dynamics. True or False. Some countries have a negative growth rate. This statement is true, as some countries experience population decline due to various factors such as low birth rates and high emigration. The current population of the Earth is around 7 billion. It was between 2011 and 2012 that we reached this milestone, demonstrating an exponential increase from previous billions and the ongoing trend towards higher global population numbers.
What are pharyngeal pouches, and how are
they evidence of evolution?
Answer:
Their similarity
Explanation:
Pharyngeal pouches are structures in vertebrates that develop in different parts of the body mainly in the face or neck. The similarity in their position and structural indicates a similarity . These structures provide evidence of evolution that the organisms evolved from the same ancestry.
A pharyngeal pouch (also known as Zenker's diverticulum) is a tiny bulge or pocket in the pharynx, similar to a hernia.
Pharyngeal pouches are transformed into different organs during evolution. This shows the relationship between different organisms using the pharyngeal pouch for different use.
Pharyngeal pouchIn embryological development, pharyngeal pouches are endodermal out-pockets that arise between the pharyngeal arches.The pouches give rise to tissues that comprise the middle ear cavity and Eustachian tube, as well as the palatine tonsils, thymus, parathyroid glands, and thyroid parafollicular cells.Thus, this is how the pharyngeal pouches are the evidence of evolution.
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6. Adaptations that result from natural selection are expected to increase the fitness of an organism.
In terms of natural selection, which of the following best describes fitness?
a. Being able to escape from predators
b. Being among the strongest organisms in a population
c. Being able to survive, find a mate, and produce offspring
d. Being able to survive long enough to reach the adult stage
Answer:
C: Being able to survive, find a mate, and produce offspring
Explanation:
The population is an important factor to the increased fitness of the organism, being able to reproduce would lead to the population of that organism to be more healthy.
Adaptation is the process by which a species adapts to its surrounding environment during evolution. Being able to survive, find a mate, and produce offspring, best describe the fitness of the organism.
Natural Selection:
It is the process by which the most appropriate organism survives and increases its population.
In a population, organisms vary in some traits, these traits may increase the chances of survival of individual over others.The variation can also decrease the chances of survival.For example, A red color butterfly is more susceptible to being eaten by predators while for a green color butterfly, there are more chances of survival.Therefore, Being able to survive, find a mate, and produce offspring, best describe the fitness of the organism.
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what type of commensal relationship is orchids growing on branches of trees ?
Which was the original source of atmospheric oxygen? Question 4 options: autotrophs cooling of Earth’s crust formation of the oceans volcanoes
Final answer:
The original source of atmospheric oxygen on Earth was autotrophs, specifically cyanobacteria, which produced oxygen as a by-product of photosynthesis over 2 billion years ago, leading to the development of more complex life forms.
Explanation:
The original source of atmospheric oxygen on Earth was autotrophs. More specifically, it was cyanobacteria -- early phototrophic organisms that evolved the capability for photosynthesis. Photosynthesis uses solar energy to convert carbon dioxide and water into glucose and, importantly, oxygen as a by-product. Cyanobacteria began to significantly contribute to the oxygenation of the atmosphere over 2 billion years ago. This process eventually gave rise to more complex life forms by increasing the oxygen content in the atmosphere and created an ozone layer that protected emerging life from harmful ultraviolet radiation.
While volcanic activity also played a role in shaping the early atmosphere by releasing various gases, it didn't contribute to the oxygenation of the atmosphere until later, when plant life became more widespread, and photosynthetic activity increased oxygen production.
Pollution from a single, identifiable source is called
source pollution.
Pollution from a single, identifiable source is called point source pollution.
Explanation:
The things that we use for the production of anything releases some wastes products that act as a pollutant to the environment. these are classified into two main category such as Point source and non point source pollution. In non point source pollution the cause for the pollution is from many places and it is very tedious to find the source of the pollution.
When a pollution occurs from a single and also an identifiable place or source then it is called as Point source pollution. Some of the examples of point source pollution includes, Factories, power plants, Municipal wastewater treatment plants,etc.
Final answer:
Pollution from a single, identifiable source is referred to as point-source pollution, which is easier to manage than nonpoint-source pollution due to its identifiable nature.
Explanation:
Pollution from a single, identifiable source is called point-source pollution. This type of contamination of the environment occurs when pollutants are released into the environment from a discernible, confined place. Examples of such single-source pollution include discharges from a pipe at a factory, overflows from combined sewer systems, leaks from storage tanks, or chemical spills. Conversely, nonpoint-source pollution is diffuse and originates from multiple, distributed sources.
In comparison, point-source pollution is generally easier to identify, monitor, and regulate, because the source is known. Nonpoint-source pollution, on the other hand, is more challenging to control, as it comes from a multitude of sources, like runoff from urban areas or agricultural fields that carry contaminants into bodies of water. It's important to understand the difference between these two types of pollution to effectively tackle environmental contamination.
economic importance of scorpion
Explanation:
ANTIVENOM PRODUCTION: venomous scorpion species are used to produce antivenom for treating enevenomation, safeguarding human health in regions where these arachnids are a threat. TOURISM: scorpion-centric eco-tourism can stimulate local economies through guided tours and related servicesZooplankton get their energy from
phytoplankton
grasses
photosynthesis
small fish
Answer:
Zooplankton -tiny aquatic habitat organisms- gets their energy from phytoplankton consumption.
Explanation:
Zooplankton, or animal plankton, is characterized by being heterophosphoric organisms, obtaining its energy by consuming organic matter.
The main food source of zooplankton is phytoplankton, although they can also feed on organic waste, from the same zooplankton or even bacteria.
Zooplankton is composed of a very small fauna that includes single-cell organisms -such as protozoa and protists- fingerlings, larval forms of mollusks, crustaceans and aquatic arthropods.
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A pyramid of energy has 100 units of energy available for the first traffic level. How many units would be available for primary consumers? How did you calculate this?