Diffusion can be described as the movement of molecules from a region of higher concentration to a region of lower concentration.
A model of diffusion could be many students pass from a crowded room into an empty hallway (option D).
A model is used to describe/illustrate a particular event or situation. In this case, the crowded room is the region of higher concentration. And the empty hallway is the region of lower concentration. The molecules refer to the students. And their movement from the crowded room to the empty hallway refers to diffusion.Learn more about diffusion: https://brainly.com/question/2135861
how do water and living things interact?
you are asked to prapare a drink that is a heterogeneous mixture.what would you prapare?
a.instant coffee and hot water
b.warm milk
c.soft drinks
d.orange juice with pulp
help bonus points
real ans plzz
Answer:
B. A Temperature Of 37°
Explanation:
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why can we go for a long time without eating but not breathing
help plz..............
Answer:
Should be 50% tell me if Im right
Mutation is a natural process that changes a DNA sequence. Most DNA changes Faul in a large areas of the genome that sits between genes, and usually they have no effect. When variation occur within jeans, there is more often a consequence, but even then mutations only really cause death or disease. Mutations also generates new variations that can give an individual A survival advantage.
Answer:
The correct answer is -
1) point mutation
2) deletion
3) inversion
4) frameshift mutation.
Explanation:
Point mutation or substitution mutation is a genetic mutation that takes place when there is a change in a single base nucleotide, it can be replaced with other nucleotides from a DNA or RNA sequence of an organism's genome.
Deletion is a genetic mutation that occurs when there is a loss of a segment of a chromosome. If the particular segment is responsible for an important protein or gene the offspring have to be with one copy only therefore, it is considered a bad mutation.
When there is a reversal of the segment of a chromosome occurs a change takes place in genetic material which is known as the inversion type of genetic mutation.
If any of the above mutations take place including deletion, inversion, replacement or insertion in one or more nucleotides to make a change in the amino acid sequence from the site of mutation forward is frameshift mutation.
Why are maritime air masses more often associated with weather disturbances?
associated with unstable air and stronger weather disturbance, there is more moisture in the air of a maritime air mass, increasing the possibility of rain, snow, and storms. forms over Canada, move down from North Pole, bring bitterly cold and dry air to the northern United States during the winter:
What are the Negative impacts of genetically modified crops
answer:
the use of some gm crops can have negative impacts on non-target organisms and on soil and water ecosystems.
explanation:
for example, the expansion of gm herbicide-tolerant corn and soy, which are twinned with herbicides, has destroyed much of the habitat of the monarch butterfly in na.
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Which cellular change in an organism could be inherited by the next generation?
1.
a change in the ribosomes in the pancreas of a squirrel
2.
the deletion of a single DNA base in a sperm cell of a trout
3.
a decrease in the size of a vacuole in a rose leaf cell
4.
the transfer of a piece of a chromosome in the skin cell of a raccoon
Answer:
4.
Explanation:
Chromosomes are passed on to children. Each parent gives 23 chromosomes to create a full set of 46.
As rocks break apart, the overall surface area will
stay the same
increase
decrease
none of the above
the role of enzymes in seed germination
Answer:
yes!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Protozoa are a type of unicellular organisms.
True
False
Answer:
True
Protozoa are eukaryotic unicellular organisms.
It's true lol and why do you take forever to get clothes?
Mercury is often used in thermometers. The mercury sits in a bulb on the bottom of the thermometer and rises up a thin capillary tube as the temperature rises. Suppose a mercury thermometer contains 3.380g of mercury and has a capillary that is 0.200mm in diameter. How far does the mercury rise in the capillary when the temperature changes from 0.0 0C to 25.0 0C
Answer:
3.5 cm
Explanation:
Mass of mercury = 3.380
Diameter = 0.200
At t = 0 and 25 degrees we have 13.596 and 13.543 as density
At 0 degree = v = 3.380/13.596 = 0.2485
At 25 degrees = 3.380/13.534 = 0.2497
We use volume of cylinder to get height
At 0⁰ height = 7.91
At 25⁰ = 7.944
The difference in height = 0.035
Multiply by 100 = 0.35 x100
= 3.5cm
Homogenization of rat liver cells results in the rupture of the cell membranes. Centrifugation of this homogenate compacts some of the homogenate into a pellet in the bottom of the centrifuge tube. Bathing this pellet with a solution containing succinate (a four-carbon organic compound), phosphate ions, oxygen, and ADP yields metabolic activity, including the production of ATP and the uptake of oxygen. This pellet most likely contains
Complete question:
Homogenization of rat liver cells results in the rupture of the cell membranes. Centrifugation of this homogenate compacts some of the homogenates into a pellet at the bottom of the centrifuge tube. Bathing this pellet with a solution containing succinate (a four-carbon organic compound), phosphate ions, oxygen, and ADP yields metabolic activity, including the production of ATP and the uptake of oxygen. This pellet most likely contains
1. peroxisomes
2. mitochondria
3. lysosome
4. Golgi complex
5. endoplasmic reticulum
Answer:
2. Mitochondria
Explanation:
Mitochondria are one of the biggest organelles in the cell. They degrade organic molecules, releasing chemical energy from their bindings through a process that consumes oxygen: cellular respiration.
The released energy is stored as ATP through the cellular respiration process and then is used in other cellular activities.
Mitochondria are more grouped in areas or tissues with higher energetical requirements.
As cellular respiration characterizes by consuming oxygen and producing ATP, we can assume that the pellet mostly contains mitochondria.
By considering the components of the pellet, we can deduce that it most likely contains MITOCHONDRIA.
Cellular respiration is a series of reactions by which aerobic cells consume oxygen and nutrients (e.g. glucose) to produce ATP and carbon dioxide.
Cellular respiration has three sequential steps: glycolysis, the Krebs cycle and oxidative phosphorylation.
Mitochondria are the energy center of the eukaryotic cells. The Krebs cycle and oxidative phosphorylation occur in the mitochondria, while glycolysis occurs in the cytoplasm.
The Krebs cycle produces a four-carbon molecule known as succinate.
Adenosine triphosphate (ATP), the energy coin of the cell, is produced from ADP and phosphate (Pi) in the three stages of cellular respiration.
Finally, oxygen is consumed during oxidative phosphorylation.
In conclusion, by considering the components of the pellet, we can deduce that it most likely contains MITOCHONDRIA.
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!!!!!!WILL MARK BRAINLIEST !!!!
2. Below is an image of 2 imaginary organisms. Organism A lived hundreds of years ago while organism B is
alive today. Explain how organism A evolved into organism B, including what environmental pressure (i.e.
predator, habitat, competition, etc) you believe guidede natural selection process that worked on this
species.
0-Organism
A
Organism-B
Answer: Click or tap here to enter text.
Answer:
The new modification in Organism B is the tail.
Explanation:
This might indicate that the organism has to sprint in order to catch prey or to get away from predators. The organism is most likely not a prey, since it has sharp teeth, making it a carnivore. The tail helps in stabilizing the animal while running. The animal might have new threats that have developed over the years (like humans).
What would happen to the living things in the pond if you increase the concentration of salt?
Answer:
they would perish
Explanation:
3. What is the difference between cotyledons in dicot seeds and the endosperm in monocot seeds?
Explanation:
Monocots contain a single cotyledon in their seed and dicots contain two cotyledons. The nutrients in the endosperm of dicots is absorbed by the two cotyledons. Therefore, a tiny endosperm is found inside the dicot seed. However, the main difference between cotyledon and endosperm is in their function during seedling.
23. What event most likely took place after photosynthetic organisms were introduced on earth? a. The atmosphere content changed from highly oxygenated to CO2 b. Mitochondria began converting glucose into ATP at a higher rate c. Oxygen was introduced into the environment allowing for many other organisms to survive d. The water cycle was thrown off causing super storms
Answer:
C. Oxygen was introduced into the environment allowing for many other organisms to survive
Explanation:
A is not correct because that is the opposite of what photogenic organisms do.
B is not correct because ATP and glucose do not apply.
D is not correct because photosynthesis does not have a direct affect on the water cycle itself.
You have purified the receptor for a hormone by affinity chromatography. During gel filtration chromatography under native conditions the receptor elutes between pyruvate decarboxylase (250 kDa) and glutamine synthetase (620 kDa). During SDS-PAGE, in the absence of reducing agents, the receptor migrates as a single band of approximately 230 kDa. When SDS-PAGE is carried out in the presence of 2-mercaptoethanol the receptor migrates as two bands of approximately 95 and 135 kDa. Explain this result.
Answer:
the hormone receptor is a heterotetramer composed of two subunits with 95 kDa and two subunits with 135 kDa
Explanation:
In this case, the heterotetramer is composed of two heterodimers, each composed of two subunits that held together by disulfide bonds. These heterodimers bind together through hydrophobic interactions in order to form a tetramer. The Sodium Dodecyl Sulfate (SDS) is a denaturing detergent that dissociates both heterodimers by interfering with hydrophobic interactions that hold heterodimers together. It is for that reason that only a single band of 230 kDa is observed (135 kDa + 95 kDa = 230 kDa). Moreover, 2-Mercaptoethanol breaks disulfide bonds, thereby separating the two subunits in the heterodimer. In consequence, after the use of this chemical compound (2-Mercaptoethanol), two different bands with 135 kDa and 95 kDa can be observed.
Why do you think that the shape of the different types of fatty acid molecules affects how easily they solidify?
Answer:
Fats are actually a type of lipid. Lipids are a major class of biochemical compounds that includes oils as well as fats. Organisms use lipids to store energy and for many other uses.
Lipid molecules consist mainly of repeating units called fatty acids. There are two types of fatty acids: saturated fatty acids and unsaturated fatty acids. Both types consist mainly of simple chains of carbon atoms bonded to one another and to hydrogen atoms. The two types of fatty acids differ in how many hydrogen atoms they contain.
Explanation:
Can I plz have brainliest
The shape of the types of fatty acid molecules has an impact on their solidification.
It should be noted that in the unsaturated fatty acid, there is at least a double bond in its string. The carbon atoms that are joined by the bonds lead to the change in their shapes.
While saturated fatty acids have a linear structure, the unsaturated fatty acids kink or bend in order to form double bonds within the chemical foundation.
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How can changes in a food chain be predicted?
Answer:
if an animal go extinct
Explanation:
when animal go extinct cause then the other animal dies that depends on that other animal
Choose one of the bubbles state whether you think we should develop this technology, and explain your reasoning
Answer:
The green buble
Explanation:
Antibiotics are added to the animal feed or drinking water of cattle, hogs, poultry and other food-producing animals to help them gain weight faster or use less food to gain weight.
Because all uses of antimicrobial drugs, animals contribute to the development of antimicrobial resistance, it is important to use these drugs only when medically necessary.
the production (e.g. growth enhancement) purposes as well as for the treatment, control or prevention of animal diseases. Even today, it is not entirely understood how these drugs make animals grow faster. The drugs are primarily added to feed, although they are sometimes added to the animals’ drinking water.
a culture started with 5000 bacteria. after 8 hours, it grew to 6000 bacteria. predict how many bacteria will be present after 10 hours
What is the function of a chromosome
A. To tightly package a single amino acid
B. To tightly package a single protein
C. To tightly package a single molecule of DNA
D. To tightly package a single gene
Answer:
C
Explanation:
A chromosome is a dna strand wrapped around a histone and coiling to give the signature chromosome shape
Answer:
C. To tightly package a single molecule of DNA
Explanation:
How can humans mitigate the effects of human development on biodiversity?
Through proper education, and by demanding that governments make decisions to preserve biodiversity, the human population will be able to sustain life on earth longer.
Helicobacter pylori, the bacterium responsible for gastric ulcers, can survive in the stomach (where the pH is as low as 1.5) in part because it synthesizes large amounts of the enzyme urease. (a) Write the reaction for urea hydrolysis by urease. (b) Explain why this reaction could help establish a more hospitable environment for H. pylori, which tolerates acid but prefers to grow at near-neutral pH.
Answer:
a) (NH₂)₂CO + H₂O ---> CO₂ + 2NH₃
b) The hydrolysis of urea by the urease enzyme generates ammonia which is a weak base. The ammonia thus produced, acts as a base by accepting the hydrogen ions present in the acidic environment of the stomach. This reactions serves to neutralize stomach acid in order to create a suitable pH environment that the bacterium requires to survive and colonize.
Explanation:
a) Urease catalyzes the hydrolysis of urea into carbon dioxide and ammonia. The equation of the reaction is shown below:
(NH₂)₂CO + H₂O ---> CO₂ + 2NH₃
b) The hydrolysis of urea by the urease enzyme generates ammonia which is a weak base. The ammonia thus produced, acts as a base by accepting the hydrogen ions present in the acidic environment of the stomach. This reactions serves to neutralize stomach acid in order to create a suitable pH environment that the bacterium requires to survive and colonize.
The reaction of ammonia with hygrogen ions from HCl is shown below:
NH₃⁺ + H⁺ ----> NH₄⁺
Therefore, the continuous activity of the enzyme urease, helps to establish a more hospitable environment for Helicobacter pylori
Which of the following is an example of a learned behavior? *
crying baby
swimming fish
walking
breathing
Answer:
Walking
Explanation:
how much is 14 pennies?
Answer:
14 cent
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Answer:
14 cents
Explanation:
$0.14
1. Mitosis is a nuclear division that ?
the chromosome number
true or false the typical X shaped chromosomes is the result of DNA replication
Answer:
True
Explanation:
Truly, the typical X shaped chromosomes is the result of DNA replication. When the DNA has replicated, it then condenses and coil into the X-shaped of the chromosome. This then implies that replicated chromosomes take the X-shaped structures seen under a microscope.
When this replication occurs, the chromosome is made of two structures that are identical. They are known as the sister chromatids. These chromatids are actually joined at the centromere.