To determine solute concentration inside a living cell, one can use osmolarity, electronic cell counting devices, and cell membrane regulation.
Explanation:To determine the solute concentration inside a living cell, you can use various techniques. One common method is the use of osmolarity, which is the concentration of solute particles in a solution. By comparing the osmolarity of the cell's cytoplasm to that of the surrounding extracellular fluid, you can determine the solute concentration inside the cell.
Another approach is the use of electronic cell counting devices, such as the Coulter counter, which detect changes in electrical resistance caused by the presence of cells in a saline solution.
Additionally, cell membranes have the ability to regulate the concentration of substances inside the cell, including ions, nutrients, and waste products. Through processes such as active transport or diffusion, the cell can maintain the desired solute concentration inside.
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There are no well-documented examples of natural selection operating on natural populations.
a. True
b. False
The correct answer is B. False
Explanation:
Natural selection is one of the main processes that lead to evolution; this involves organisms in a population being more suitable to survive and reproduce due to specific traits, this causes over the time a population evolves as only organisms with certain traits survives while other organisms disappear.
Natural selection was first officially documented by Charles Darwin based on observations he made on Galapagos Islands and Argentina. Besides this, based on Darwin's proposal many scientists and biologists have documented natural selection in both natural and non-natural populations. A famous example of this is peppered moths in England that changed its color to dark due to the Industrial Revolution making trees darker and therefore making dark moths more suitable to survive. Thus, it is false there are no well-documented examples of natural selection on natural populations because over the years this phenomenon has been plenty documented.
What fluid, with a very high osmolarity, was used in part 2 of the paper chromatography experiment? why is this important? why is it essential to keep it cool?
The fluid which has very high osmolarity used in the experiment was Sucrose solution.
This fluid is important because it regulates the natural reaction of the leaves and also prevents interference from outside sources.
It was essential to keep it cool because cold temperature helps inhibit the rate of photosynthesis so it gives protection to degradation of proteins.
What would happen if the cell membrane were not selectively permeable ? Support your response
William wanted to create a report on a geographical location with the greatest species diversity. Which ecosystem can consider for his report?
Answer:
William could creat a report of the Mexican beaches such as Nayarit state.
Explanation:
Nayarit state has a dry forest or dry tropical jungle, the ecosystem that has the most extesive number or species in the world, called as a megadiversity. México is the 3er place in the ranking of biodiversity in the world.
Ome bacteria in the deep oceans use iron as an energy source to make carbohydrates from carbon dioxide. these bacteria would be classified as
When Earth receives energy from the Sun, ____.
a.
some energy is reflected back into space
b.
some is absorbed by the atmosphere
c.
some is absorbed by land and water on Earth's surface
d.
all of the above
The correct answer is d. all of the above.
About 29 % of the solar energy is reflected back to space by clouds, particles in the atmosphere and by snow or sea ice and about 23 % of solar energy is absorbed by dust, water vapor and ozone present in the atmosphere. Only 48 % of solar energy passes through the atmosphere and is absorbed by the surface. Thus, approximately 71 % of the total solar energy is absorbed by the Earth system.
Describe the joints and movements involved in crossing your legs while sitting
________ are the fundamental building blocks of heredity.
In the spring of 2007, the bear population of Aroostook County, Maine increased by 400 bears because they mated and had offspring. This is an example which shows that all living things ____. A. respond to their environment B. have homeostasis C. can reproduce D. have cellular organization
Why is it necessary to equalize water levels in the buret and the leveling funnel?
A maternal effect can cause the offspring phenotype ratio to depart from that of classic mendelian inheritance. in a species of snail, the dominant allele n codes for right-handed shell coiling and recessive allele n codes for left-handed shell coiling. if an nn female with right-handed shell coiling mates with an nn male, what is the shell coiling phenotypic ratio of their offspring?
The large intestine contains a lot of bacteria that are commonly referred to as the gut flora. what function do these bacteria have within the process of digestion and in our body? what can cause an imbalance to these bacteria and what complications could this lead to?
SUBJECT SCIENCE!
An equal-arm balance is used to measure:
A. mass
B. volume
C. density
D. force
For cats, the main determinant of a food's palatability is its protein content. for cats, then, food tastes especially good when it activates _____ receptors in the gustatory system
Final answer:
For cats, the main determinant of a food's palatability is its protein content. for cats, then, food tastes especially good when it activates umami receptors in the gustatory system .
Explanation:
For cats, food tastes especially good when it activates umami receptors in the gustatory system. The taste known as umami is often referred to as the savory taste, and it is based on the activation of G protein-coupled receptors by a specific molecule, which in the case of umami is the amino acid L-glutamate. This is why cats, who require a diet high in protein, find foods with higher protein content more palatable, as proteins are rich in amino acids like L-glutamate that activate these umami receptors.
Can you distinguish among the three processes of genetic transfer in bacteria
The gene responsible for a particular congenital cardiac anomaly is said to have complete penetrance. what are the clinical implications of this fact?
"Using the three points of the cell theory, explain how humans and bacteria are similar."
Answer:
Cell theory was first developed by Scheldien and Schwann. The cell theory was follows by all the living organism except viruses. The cell theory explains that eukaryotes and bacteria are similar.
Both the bacteria and humans are made of more than one cells. Cells acts as the structural and functional unit of the humans and bacteria. All the important functions of the bacteria and humans are done by cells. The living cell of the bacteria and human are arise from the pre existing cell.
A client is being treated for stomach cancer. the client is in considerable and constant pain, and the family is asking why. how does soft tissue cancer cause pain
A hypothesis is unrelated to the theoretical framework.
a. True
b. False
The presence of a zygote having one chromosome with the normal complement of genes and one with a missing gene is characteristic of which genetic disorder
The region of africa in which zebras, elephants, wildebeests, antelope and other large animals live is known as the
What dietary education should the nurse provide to a client diagnosed with a hiatal hernia?
after glycolysis occurs, the products may enter the Krebs cycle. Which major products result from these reactions
Which factors affect the movement of ocean currents?
The movement of ocean currents is influenced by the Earth's rotation, causing the Coriolis effect, and differences in water density due to temperature and salinity. Prevailing winds and the shape of ocean basins also drive surface currents, which help distribute heat globally and impact climate and weather patterns.
The factors affecting the movement of ocean currents include several key dynamics. One important factor is the rotation of the Earth, which results in the Coriolis effect. This effect causes currents in the Northern Hemisphere to veer to the right and those in the Southern Hemisphere to veer to the left. The Earth's rotation influences the path of both winds and surface ocean currents, making it seem like they are bending when in fact, they are moving straight relative to the Earth's surface.
Density differences driven by variations in temperature and salinity are also critical in determining the vertical and horizontal movement of ocean currents. Warmer or less salty water tends to be less dense and rises, while colder or saltier water is denser and sinks. This difference in density leads to thermohaline circulation, which is crucial for deep ocean currents.
Surface ocean currents are largely driven by prevailing winds and are also affected by the Earth's rotation and the shape of the ocean basins. These currents play a vital role in distributing heat across the planet and therefore influencing the global climate. The examples include the Gulf Stream and California Current, which significantly affect local weather and seasonal events.
Brainstorm and create a list of 4 human activities that interfere with ecosystems, food chains and food webs. For each explain how it happens, why we do it, and mention short and long term effects
Answer:
The humans are the dominant consumers. They influence food chains and food web through agriculture, production of energy, habitat destruction, pollution, hunting, and overfishing. This is generally done in order to fulfill the demands for food and shelter along with the growth of population. In long term, it influences aquatic and soil ecosystems.
In case if due to human activities if one community of animals gets extinct then there will be a chain reaction of animals getting extinct. The animals live in harmony to thrive and without which it will proliferate into more extinct animals. Ultimately the majority of the animals will no longer be alive.
"what part of the carbon cycle might transfer carbon into the lithosphere?"
To Be considered considered valid, the results of a scientific experiment must be?
A fracture of a long bones that has a noticeable bend in the shaft isâ called:
The answer is an angulated fracture. This kind of fracture designates an exact type of fracture displacement where the usual axis of the bone has been transformed such that the distal portion of the bone is positioned off in a diverse way. It is best described using words like palmar or dorsal, valgus or varus, and ulnar or radial.
Tightly closed cones in some conifers are adapted to open in response to
Which list ranks the gases in the atmosphere from most to least abundant? A. oxygen, carbon dioxide, nitrogen, argon B. nitrogen, oxygen, argon, carbon dioxide C. nitrogen, carbon dioxide, oxygen, argon D. carbon dioxide, argon, nitrogen, oxygen