1. Define diffusion. 2. A glucose-starch solution was placed in dialysis tubing. Then, the tubing was placed in a cup containing IKI indicator. Did starch stay within the tubing or move out of the tubing? Did IKI indicator stay in the solution in the cup or move into the tubing? Support your answer with the observations. 3. Put the IKI solution in the cup and the contents of the dialysis tubing were tested with the glucose test strips. Did glucose stay within the dialysis tubing or move out of the tubing? Support your answer with the observations. 4. How is a cell membrane similar to the dialysis tubing used?5. Might it be inferred that:_______.
a) starch and glucose molecules are the same size,
b) starch molecules are larger than glucose molecules, or
c) starch molecules are smaller than glucose molecules. Explain your answer. 6. How did hypotheses compare with outcomes?7. What is osmosis,8. Is osmosis a form of active or passive diffusion/transport? Why?9. Why do intravenous (IV) solutions need to have the same tonicity as blood?10. What occurred when blood mixed with solution? Why did this occur?11. Is the movement of substances in this exercise active or passive?
Answers
Once equilibrium is attained, molecules move through the process of diffusion from an area of higher concentration to an area of lower concentration. The cell or any other external source of energy is not needed because it is a passive process.
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration until equilibrium is reached.Starch stayed within the tubing and did not move out, as observed by the lack of blue-black color of the IKI indicator in the tubing. On the other hand, the IKI indicator moved into the tubing, as observed by the blue-black color of the solution inside the tubing.Glucose moved out of the dialysis tubing and into the cup containing the IKI solution, as observed by the glucose test strips turning blue. This indicates that glucose molecules are smaller than the pores of the dialysis tubing, allowing them to diffuse out.A cell membrane is similar to dialysis tubing in that both are selectively permeable membranes that allow certain molecules to pass through while restricting others based on size and charge.The answer is b) starch molecules are larger than glucose molecules. Starch is a polysaccharide consisting of many glucose molecules linked together, and therefore has a larger molecular size than glucose.The hypothesis that starch would stay within the tubing and glucose would move out was supported by the outcomes of the experiment.Osmosis is the diffusion of water molecules through a selectively permeable membrane from an area of high concentration to an area of low concentration.Osmosis is a form of passive transport, as it does not require energy input from the cell to move molecules across the membrane.IV solutions need to have the same tonicity as blood to prevent damage to red blood cells. If the solution is hypertonic, water will move out of the cells causing them to shrink, while if the solution is hypotonic, water will move into the cells causing them to burst.When blood mixes with a solution, water molecules will move across the membrane based on the relative tonicity of the two solutions. If the solution is hypertonic, water will move out of the blood cells causing them to shrink, while if the solution is hypotonic, water will move into the cells causing them to burst.The movement of substances in this exercise is passive diffusion, as it occurs down a concentration gradient without the input of energy.To learn more about diffusion visit;
https://brainly.com/question/20843145
#SPJ4
Related Questions
PLEASE HELP!!
1. What characteristic was noticed in early hominid fossils that set them apart from apes?
Early hominids had larger brains than us.
Early hominids exhibited bipedalism.
Early hominid DNA was identical to ape DNA.
Answers
Answer:
I think its B
Explanation:
Early hominid fossils exhibited bipedalism, which set them apart from apes.
What is Bipedalism?Bipedalism refers to the ability to walk on two legs, which is a distinctive feature of hominids. Unlike apes, which walk on all fours, hominids are adapted to walking on two legs, which allows for more efficient movement and frees up the hands for other tasks.
The evolution of bipedalism is considered a significant development in human evolution, as it led to the development of other unique features such as larger brains and tool use.
While early hominids did have larger brains than their primate ancestors, this did not set them apart from apes, as some modern apes such as chimpanzees also have relatively large brains compared to other animals.
Additionally, early hominid DNA was not identical to ape DNA, although there would have been some genetic similarities due to the shared ancestry of apes and hominids.
Learn more about hominids at:
https://brainly.com/question/10510068
#SPJ2
The pathway in which lipoproteins are transported from the liver to cells is referred to
Group of answer choices
Endogenous pathway
Exogenous pathway
Apolipoprotein pathway
Chylomycorn distribution pathway
Triacylglycerol absorption pathway
Answers
The pathway in which lipoproteins are transported from the liver to cells is referred to as the Endogenous pathway.
The pathway in which lipoproteins are transported from the liver to cells is referred to as the endogenous pathway. This is a long answer because it explains the meaning of the term and provides some context for it. The endogenous pathway involves the production of very low-density lipoproteins (VLDL) in the liver, which are then released into the bloodstream.
These lipoproteins contain a high proportion of triacylglycerols and cholesterol esters, which are important sources of energy for cells throughout the body. As the VLDL particles circulate in the bloodstream, they are metabolized by enzymes and transformed into intermediate-density lipoproteins (IDL) and low-density lipoproteins (LDL). These particles are then taken up by cells throughout the body via receptor-mediated endocytosis.
To know more about cells visit:-
https://brainly.com/question/30046049
#SPJ11
Natural processes such as speciation and gradualism provide the genetic basis for
a. evolution
C. biogenesis
b. spontaneous generation
d. sexual reproduction
Answers
Answer:
A. Evolution
Explanation:
Natural processes like speciation create variation in species, making them have biodiversity and a diverse gene pool.
Gradualism also allows for species to change gradually over time.
Both of these processes allow for evolution to occur, as speciation can create more favorable traits that will be passed down with the process of gradualism.
So, the correct answer is A, evolution.
Natural processes such as speciation and gradualism provide the genetic basis for evolution. Thus, option A is correct.
What is speciation?Natural processes like speciation create variation in species, making them have biodiversity and a diverse gene pool. Gradualism also allows for species to change gradually over time.
Both of these processes allow for evolution to occur, as speciation can create more favorable traits that will be passed down with the process of gradualism.Traits may be defined as the appearance or manifestation of a character. In genetics, traits are also known as Phenotypes.
Natural selection always carries their successful or most favorable traits into the next generation and eliminates the unsuccessful or least favorable traits. Or in other words, natural selection states the occurrence of the most favorable variations.
Therefore, Natural processes such as speciation and gradualism provide the genetic basis for evolution. Thus, option A is correct.
Learn more about evolution on:
https://brainly.com/question/13492988
#SPJ2
The main difference between the brains of humans and animals is that:a. Humans have larger brains.b. Animals have a higher proportion of cortex.c. Humans have proportionately more cortex.d. Humans have proportionately more brainstem.
Answers
Human brains differ significantly from animal brains in that they have proportionately greater cortex.
What is brain?The brain is a sophisticated organ that regulates a variety of bodily activities, including thought, memory, emotion, touch, motor skills, vision, breathing, temperature, and hunger. It is the source of all the characteristics that characterize our humanity and is composed of more than 100 billion nerves that communicate through trillions of connections.
The volume of the neocortex is highly predictable from absolute brain size in a number of species, including anthropoid primates and parrots and songbirds, which have more cortical neurons than similar-sized primates. These species also have more complex brains than other mammals.
To know more about brain, visit:
https://brainly.com/question/11950231
#SPJ1
50 POINTS BRAINLIEST IF CORRECT reported if you are putting a random answer or wrong
Spores from plants grow into _____.
gametophytes
sporophytes
gametes
embryos
Answers
Spores divide through meiosis and the daughter cells are gametophytes that have half the number of chromosomes in somatic cells(they are haploid).
Answer:
The answer is gametophytes
Explanation:
how to get over a girl regecting you?
Answers
Answer:
okay, this is a toughy. so I recommend you take advise not only from people on the internet but people who know you and the exact situation.
Explanation:
it won't let me send all that so I took screenshots and put those on instead. hope that helps
Which of the following is an example of a physical property? a Melting and boiling points b color c Ability to conduct electricity d All of the above
Answers
Answer:
all above.
Explanation:
I had the same question for k12.
If an enzyme is inhibited by a substance that binds away from the active site this substance must be?
Answers
If an enzyme is inhibited by a substance that binds away from the active site this substance must be an allosteric inhibitor.
What is an allosteric inhibitor?An inhibitor is a substance that prevents an enzyme from acting. The inhibitor may or may not bind to the active site of the enzyme. Hence not all the inhibitors binds to the active site.
If an enzyme is inhibited by a substance that binds away from the active site this substance must be an allosteric inhibitor.
Learn more about allosteric inhibitor:https://brainly.com/question/13641467
#SPJ4
Which component is not directly involved in translation?.
Answers
The DNA molecule is not directly involved in the process of translation. Translation is the process of formation of proteins from the mRNA which is transcribed from DNA. Thus, the correct option is C.
What is Translation?Translation is the process of formation of proteins in the ribosomes of Rough Endoplasmic Reticulum through the mRNA (messenger RNA). mRNA is formed by the transcription of DNA in the nucleus of the cell.
The mRNA contains sequence which is complementary to the DNA of the organism, and this mRNA encodes for the amino acids which synthesize the proteins. Thus, the protein synthesis is dependent upon the DNA sequence present in the cell.
Therefore, the correct option is C.
Learn more about Translation here:
https://brainly.com/question/9734835
#SPJ2
Your question is incomplete, most probably the complete question is:
Which component is not directly involved in translation?
a. Ribosomes
b. tRNA
c. DNA
d. mRNA
The new strain of covid is spreading at the rate of 12% a week. Currently, there are 100,000 people infected with the virus. How long will it take before the virus has infected 800,000 people?.
Answers
The time that it would take the disease to spread is exponential function.
What is the infection rate?We know that a disease spreads rapidly and that it is possible to make use of a mathematical model to tell the rate at which the infection would spread across board. We have that;
Number of infected people Po = 100,000
Number of people infected after time t = 800,000
Time taken = t
Infection rate = 12%
We then have that;
P(t) = P(o)e^rt
800,000 = 100,000e^0.12t
800,000/100,000 = e^0.12t
8 = e^0.12t
ln 8 = 0.12t
t = ln 8/0.12
t = 17 days
Learn more about exponential function:https://brainly.com/question/14355665
#SPJ1
URGENT!!
which structures in plants and in humans normally carry amino acids
arteries? phloem? ureters?
Answers
Answer:
In the human arteries
In the plant phloem
Welcome dear
The amino acids are present in both animals and plants, and the plants get them through the phloem and the animals get them through the arteries. Arteries are blood vessels that transport digested foods to cells.
How are the macromolecules used by the cells?Macromolecules such as polysaccharides, starch, proteins, etc. are not directly used by individual cells, but they are broken down and used by both plant and animal cells. The animals eat macromolecules such as starch and protein, and all these are broken down into monomers by the digestive organs such as the stomach and the intestine and later absorbed into the blood vessels and distributed to the body cells. In plants, the amino acids are distributed by the phloem to different parts and later used for different processes.
Hence, the amino acids are present in both animals and plants, and the plants get them through the phloem and the animals get them through the arteries.
Learn more about the macromolecules here.
https://brainly.com/question/6849865
#SPJ2
according to the results of the experiment, dmd myocytes exhibit dysfunction in which part(s) of cellular respiration? i. complex i ii. complex ii iii. the citric acid cycle
Answers
The results of the experiment show that DMD myocytes exhibit dysfunction in complex I and complex II of cellular respiration (Options i and ii).
What is DMD?DMD stands for Duchenne Muscular Dystrophy. It is a genetic condition that results in muscle degeneration and weakness due to a lack of dystrophin, a protein that helps muscles function properly. The loss of this protein causes instability in the membranes of muscle cells, which makes them more susceptible to injury and damage.
DMD myocytes are muscle cells that have been affected by Duchenne muscular dystrophy. They have been found to exhibit dysfunction in complex I and complex II of cellular respiration. Complex I is involved in the oxidation of NADH, while complex II is involved in the oxidation of succinate. This dysfunction can lead to a buildup of reactive oxygen species, which can cause oxidative stress and further damage to muscle cells. The citric acid cycle, also known as the Krebs cycle, is not directly affected by DMD myocytes dysfunction.
Thus, the correct options are i and ii.
Learn more about myocytes: https://brainly.com/question/30629564
#SPJ11
Differentiate between Gene and chromosomes. (any four differences )
plz hurry
who ever will give at least 4 differences would be marked as brainlist.
Answers
2) Gene mutations are small, but chromosome mutations are large.
3) Genes are composed of either DNA or RNA, but chromosomes are composed of DNA, RNA AND Histones.
4) A single gene is a locus on chromosome, but a single chromosome compromises of many genes.
Hope this helped :)
Some members of the Euglenids are photosynthetic, yet they will lose their photosynthetic pigment if left in the dark. True or False: After storing Euglenids in the dark, the loss of the photosynthetic pigment is permanent.
Answers
A) Some members of the Euglenoids lose their photosynthetic pigment when left in Dark : TRUE
B )The loss of photosynthetic pigment in Euglenids stored in the dark is permanent : False
What are EuglenasEuglenas are unicellular organisms belonging to the kingdom Protista, when kept in the dark for too long Euglenoids begin to lose their chlorophyll. As it loses its chlorophyll it becomes unable to produce its own food and starts consuming bacterias within its habitat.
The loss of chlorophyll in Euglenids can be regained after it is been exposed to sunlight and allowed to grow exponentially for several weeks.
Hence we can conclude that Some members of the Euglenoids lose their photosynthetic pigment when left in Dark : TRUE while The loss of photosynthetic pigment in Euglenids stored in the dark is permanent : False
Learn more about Euglenoids : https://brainly.com/question/1278307
Aerobic energy production supports the anaerobic systems by_____ o This is an incorrect statement; aerobic energy production does not support anaerobic energy systems. o metabolizing lactate that has been released by working muscles (in other tissues). o providing energy for the rephosphorylation of creatine to make creatine phosphate (creatine shuttle). o creating more creatine as a byproduct of ATP production in mitochondria. o only oxidizing fatty acids, leaving glucose molecules for anaerobic glycolysis.
Answers
Aerobic energy production does not support anaerobic energy systems.
Aerobic energy production refers to the metabolic process of producing energy that requires oxygen. Aerobic respiration is a metabolic pathway that includes the breakdown of glucose or fat molecules with oxygen to produce energy in the form of ATP. In contrast, anaerobic respiration is the metabolic process that produces energy without using oxygen.Aerobic energy production does not support anaerobic energy systems. Aerobic and anaerobic energy systems are two distinct metabolic pathways, each with its own distinct characteristics.
While aerobic energy production requires oxygen and occurs in the mitochondria, anaerobic energy systems do not require oxygen and occur in the cytoplasm of cells. Furthermore, the two systems differ in the amount of energy they produce and the speed at which they produce it. Anaerobic energy systems produce energy rapidly but only for a short period, while aerobic energy systems produce energy at a slower rate but can maintain it for an extended period. Therefore, it can be concluded that aerobic energy production does not support anaerobic energy systems.
Know more about anaerobic energy, here:
https://brainly.com/question/24203939
#SPJ11
Tundra how move with carbon though atmosphere?
Answers
Answer:
Boreal and northern tundra ecosystems typically obtain carbon (carbon sink) stored in plant biomass and new soil organic matter during the short summer growing season, when photosynthesis and plant growth are greater than normal. normal. carbon respired by plants and soil back into the atmosphere.
Explanation:
what would happen if an electric fish was always negatively charged instead?
Answers
Answer:
Electric eels are part of a group of animals called electric fish.These cells pump positively charged sodium atoms, called ions, from inside themselves to the outside.
Explanation:
Brainliest? plz
Electric fish is a part of the group of animals which are responsible for producing charge. These organisms pump positively charged sodium ions from inside themselves to the outside environment.
What is electric fish?
An electric fish is an fish that can generate electric fields and transfer current through themselves. Most of the electric fishes are electroreceptive, which means that these fishes can sense the electric fields present in the environment. The only exception here is the stargazer family which is not electroreceptive.
The examples of electric fish includes Electric eel, that belongs to the genus Electrophorus, South American knifefishes responsible for the production of powerful electric shocks to stun prey.
If the electric fishes are supplied with the negative charge always then they will pump positive charge to neutralize the effect of that charge.
Learn more about Electric fish here:
https://brainly.com/question/14788080
#SPJ2
Nitrogen bases pair with bases that are...
available
complementary
complementary and identical
identical
Answers
It’s not identical as A-T and C-G is what happens
Nitrogenous bases basically pairs with bases that are complementary. The correct option is B.
What are nitrogenous bases?Nucleobases, also referred to as nitrogenous bases or purely bases, are nitrogen-containing biological molecules that form nucleosides, which are then constituents of nucleotides, all of which are the basic building boxes of nucleic acids.
A set of 5 nitrogenous bases is used to build nucleotides, which then in results nucleic acids such as DNA and RNA.
These bases are critical because their sequencing in DNA and RNA is how information is stored.
A base pair in DNA are complementary to each other. Under normal conditions, the nitrogen-containing bases adenine (A) and thymine (T) pair, whilst also cytosine (C) and guanine (G) pair.
The structure of DNA is formed by the binding of these base pairs.
Thus, the correct option is B.
For more details regarding nitrogenous bases, visit:
https://brainly.com/question/14090794
#SPJ2
what is the function of mid brain
Answers
Answer:
The midbrain functions as a relay system, transmitting information necessary for vision and hearing. It also plays an important role in motor movement, pain, and the sleep/wake cycle. The midbrain, also called the mesencephalon, is a part of the central nervous system.
PLEASE HELP
The definition of a mutation is… (1pt)
a. Any change in an organism.
b. Something extra on an organism’s body.
c. Any change in the genetic makeup of an organism.
d. A genetic change that hurts an organism’s ability to survive.
Answers
Answer:
The answer is C
Explanation:
Just tell me if I am right or wrong, I also have no explanation, my cousin told me. Aha.
Look at the image of the solar system.The solar system shows the planets in their orbits around the Sun in this order: Mercury, Venus, Earth and its Moon, Mars, Asteroid belt, Jupiter, Saturn, Uranus, Neptune.According to Kepler, which planet travels the fastest?
Answers
answer.
earth
explane.
the Earth is always fastest because the is always rolling
Answer:
Mercury
Explanation:
Mercury is the fastest planet, which speeds around the sun at 47.87 km/s. In miles per hour this equates to a whopping 107,082 miles per hour. 2. Venuses the second fastest planet with an orbital speed of 35.02 km/s, or 78,337 miles per hour.
What do you think medical professionals should do to prepare for when antibiotics don’t work any more?
Answers
Answer:
medical professionals should prepare for a backup plan i.e they should Always have other antibiotics in store
1. In 1889, August Weismann, a German biologist, conducted an experiment attempting to produce mice
without tails. He cut the tails off adult mice and then allowed them to mate. All offspring had long tails.
He repeated the experiment many times, always with the same results. This experiment helped to
disprove the concept of
a. Inheritance of acquired traits
b. Survival of the fittest
C. Overproduction in a species
d. Struggle for existence
Answers
Answer: inheritance of acquired traits
Explanation: I took the test and aced it so I hope this helped!!
Among the yup'ik of western alaska seals have souls. these souls are returned to the sea during an annual festival when the ________ of the seal, which contains its soul, is shoved through the hole in the ice.
Answers
Among the yup'ik of western alaska seals have souls. these souls are returned to the sea during an annual festival when the bladder of the seal, which contains its soul, is shoved through the hole in the ice.
The harbour (or harbour) seal (Phoca vitulina), also known as the common seal, is a true seal found along the Northern Hemisphere's temperate and Arctic marine coastlines. They are the most widely distributed pinniped species (walruses, eared seals, and true seals) and can be found in coastal waters of the northern Atlantic, Pacific, Baltic, and North Seas.
Harbor seals have V-shaped nostrils and are brown, silvery white, tan, or grey. Blubber under the seal's skin aids in body temperature regulation. Males outlive females (30–35 years versus 20–25 years). Harbor seals return to familiar resting or haulout sites, which are generally rocky areas (although ice, sand, and mud may also be used) near a foraging area where they are protected from adverse weather conditions and predation.
For such more questions on Alaska seals:
brainly.com/question/20725639
#SPJ4
why do seabirds breed in dense colonies (as large as a million or more birds) on islands, cliffs, or headlands?
Answers
Because they are protected from terrestrial predators by breeding in large colonies on islands, cliffs, or headlands, seabirds.
Seabirds: Endotherms or not?What Characterizes a Seabird? All birds (members of the order Aves) have wings (of varying sizes), beaks, and claws. They are also endothermic (warm blooded). Seabirds are different from other birds in that they spend their entire lives in open water and are not tethered to land except while they are nesting.
Why do seabirds breed together in groups?Additionally, synchronised breeding produces an abundance of offspring that is sufficient to feed predators. When it comes to protection from terrestrial predators, seabird colonies on islands clearly outperform those on the mainland. Other situations can also be found where bird colonies avoid predation.
To know more about seabirds breed visit:-
https://brainly.com/question/10219588
#SPJ4
a client has been experiencing a decrease in serum calcium. after diagnostics, the physician proposes the calcium level fluctuation is due to altered parathyroid function. what is the typical number of parathyroid glands?
Answers
There are typically four parathyroid glands in each person.
The thyroid gland contains four parathyroid glands, which secrete the parathyroid hormone (PTH). Another hormone, calcitonin, is secreted by so-called C cells that are scattered throughout the thyroid gland, parathyroids, and thymus. The preservation of calcium homeostasis is significantly influenced by both hormones.
PTH, a polypeptide secreted in response to hypocalcemia, increases renal calcium reabsorption, mobilizes calcium from bones by stimulating osteoclastic activity, stimulates the absorption of calcium from the small intestine in the presence of sufficient amounts of vitamin D, and lowers plasma inorganic phosphate levels by inhibiting renal phosphate reabsorption.
To learn more about parathyroid glands, refer:-
https://brainly.com/question/14152065
#SPJ4
Why are decomposers classified as heterotrophs?
Answers
Answer:
Becuase they break down and feed on organic molecules (the remains of dead organisms) and release inorganic molecules
Explanation:
A farmer wants to breed a variety of taller corn.
a) How can the farmer use variation in the height of the
current corn plants to produce taller corn plants?
b) Will the farmer’s work be most effective if height in
corn plants is determined by polygenic inheritance,
multiple alleles, or co-dominant alleles? Explain.
c) The farmer fi nds that many of the tallest corn plants
are also very susceptible to a particular disease. How
could the farmer design an experiment to fi nd out
if the genes for height are linked to the genes for
resistance to the disease?
d) If these genes are linked, what steps could the farmer
take to create a breed of corn that is taller and more
disease-resistant than the current corn crop?
Answers
The farmer can use variation in the height of the corn plants to cross them and produce taller corn plants. The farmer's work will be most effective if height is determined by codominance.
CodominanceCodominance refers to the fact that different alleles of a given gene locus can affect a phenotype.
The farmer's work will be most effective if height is determined by codominance because he/she will need to select hybrid plants in a generation to breed them.
The farmer can observe the proportion of taller offspring that are affected by the disease in order to analyze if heigh and disease resistance genes are linked.
If these genes are linked, then it is required to cross plants and then select recombinant offspring with desired features (in this case, taller and disease resistance plants).
Learn more about codominance here:
https://brainly.com/question/14053639
3. Which of the following is an igneous rock?
a. gneiss
b. shale
c. limestone
d. pumice
Answers
Answer:
the answer is d
Explanation:
just use google
Necesito una opinión breve sobre la violencia doméstica. POR FAVOR, la necesito breve.
Answers
Answer:
La violencia doméstica (también conocida como violencia familiar) ocurre cuando alguien usa la violencia o la manipulación para mantener el poder y el control sobre alguien cercano. Puede implicar violencia, intimidación, amenazas, insultos o manipulación psicológica. No es aceptable en ningun lugar del mundo en ninguna circunstancia. La personas que han sufrido Violencia Domestica deben buscar por apoyo cuanto antes.
Explanation: