A student carried out an experiment to model the digestion of starch by the enzyme amylase in the small intestine.
Visking tubing is a selectively permeable membrane that has small holes in it to allow small molecules to pass through. At regular intervals, the student tested the liquid inside and outside the Visking tube.
How could the student test for the presence of starch inside the Visking tubing?
Answer:
Put one drop on the dimple tile, and the rest in a test tube. Then put the teat pipette back in the water outside the Visking tubing. Test the drops of liquid in the dimple tile by adding one drop of iodine solution from the dropper bottle. If they turn blue-black, the liquid contains starch.
Explanation: i hope this helped :)
Use the following information to calculate the correct frequencies: In a population of
Pennsylvanians, only 18% of individuals express the recessive trait of Syndactyly or webbed finger
(formulas: p+q=1 and p²+2pq+q2²=1)
a. What percentage of the population are not Webbed?
If we have the recessive genotypic frequency, we can calculate the phenotypic frequencies in a population in Hardy-Weinberg equilibrium. The percentage is 82%.
What si the Hardy-Weinberg equilibrium theory?The Hardy-Weinberg equilibrium theory states that allelic and genotypic frequencies remain the same through generations in a population that is in equilibrium.
The allelic frequencies in a locus are represented as p and q. Assuming a diallelic gene,
Allelic frequencies
The frequency of the dominant allele f(X) is pThe frequency of the recessive allele f(x) is qGenotypic frequencies after one generation are
• p² ⇒ H0m0zyg0us dominant genotypic frequency,
• 2pq ⇒ Heter0zyg0us genotypic frequency,
• q² ⇒ H0m0zyg0us recessive genotypic frequency.
The addition of the allelic frequencies equals 1
p + q = 1.
The sum of genotypic frequencies equals 1
p² + 2pq + q² = 1
Available data:
18% of individuals express the recessive trait of Syndactyly
Let us say that the dominant allele is A and the recessive allele is a.
The dominant allele A codes for normal finger.The recessive allele a codes for webbed finger.Assuming this gene expresses complete dominance,
H0m0zyg0us dominant and heter0zyg0us -AA and Aa- individuals have normal finger.Their frequency in the population is p² + 2pq.
h0m0zyg0us recessive -aa- individuals have webbed finger.Their frequency in the population is q².
Individuals that express Syndactyly have webbed finger and their genotype is h0m0zyg0us recessive, aa. Their frequency in the population is q².
q² = 18% = 0.18
We can get the frequency of individuals with normal fingers by clearing the following equation,
p² + 2pq + q² = 1
p² + 2pq + 0.18 = 1
p² + 2pq = 1 - 0.18
p² + 2pq = 0.82
The frequency of individuals with normal fingers is p² + 2pq = 0.82 = 82%.
The percentage of the population are not Webbed is 82%.
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What is carrying capacity?
The highest number of different species an environment can
support.
The highest organism size an environment can support.
The highest population an environment can support.
The highest growth an environment can support
Answer:
The highest population an environment can support.
Name the cavity between the nose and mouth.
A. pharynx
B. larynx
C. trachea
D. Esophagus
The cavity which separate or in between the nose and the mouth is the nasal cavity.
The nose and the mouth meet at a junction called the pharnx; option A
What is nasal cavity?The nasal cavity refers to a large, air-filled space above and behind the nose in the middle of the face. It is the cavity which divides the nose and mouth.
However, the nasal septum divides the cavity into two cavities .
The larynx is the passageway for air between the pharynx above and the trachea below.The pharynx carries air, food and fluid down from the nose and mouth.So therefore, the cavity which separate or in between the nose and the mouth is the nasal cavity.
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What is spermatogenesis and sporophyte?
Answer:
Explanation:
1. Production of sperm by meiosis
2. diploid generation which alternates with haploid (in plants)
The genetic combination for the trait is the __________ and the physical characteristic that you see is the _________.
Answer:
1. Genotype 2. Phenotype
Explanation:
Hemlock trees support life of other organisms. Climate change has increased the rate of infection of Hemlocks with woolly adelgid. These kill the trees which decrease the habitat of animals and other insects. This is an example of how climate change impacts the
Answer:
Don't know your answer choices, though if one of them is "Community Level" that is the correct one.
Explanation:
Found on other websites, and just completed a quiz with the same answer.
URGENT
State two reasons why some molecules can pass through a certain membrane, but other molecules can not.
Answer:
Molecules with bigger charge or size can not pass through every membrane but other molecules can.
1. bigger size
2. bigger charge
3. electronegativity
Explanation:
Hope this helps you!
how do organs work together to form specific functions
Answer:
Sistemas orgánicos
Explanation:
Aunque cada órgano del cuerpo realiza sus funciones específicas, los órganos también funcionan juntos por grupos, a los que se denomina sistemas orgánicos (ver Principales sistemas orgánicos). Los médicos clasifican las enfermedades y sus propias especialidades médicas de acuerdo a los diferentes sistemas orgánicos.
At which of these locations is a dietician least likely to work?
school
theater
hospital
nursing home
Answer:
B. Theater
Explanation:
Think about it. Would a dietician really work at an amusement park? That sounds ridiculous! If a dietician wouldn’t work at an amusement park, he or she would not work at a theater.
You’re welcome.
some chains of carbon atoms bend when the carbon atoms:
A. form single covalent bonds.
B. form double covalent bonds.
C. form bonds with oxygen atoms.
D. form bonds with hydrogen atoms.
Answer:
Fats with at least one double bond between carbon atoms are unsaturated fats. When some of these bonds are in the cis configuration, the resulting bend in the carbon backbone of the chain means that triglyceride molecules cannot pack tightly, so they remain liquid (oil) at room temperature.
Which led most directly to the decline of the latin language?
oa. the death of joan of arc
ob. fear of witchcraft
oc. the great schism
o d. interest in poetry
The great schism was what led to the decline of the latin language and is denoted as option C.
What is Great schism?This was characterized by Christianity being divided into two divisions, Roman Catholic and Eastern Orthodox.
This led to the latin language being replaced with others such as Greek etc in this scenario.
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ASAP!
Active transport differs from Passive transport in that:
A. Only Active transport uses membrane proteins.
B. Only Passive transport uses membrane proteins.
C. Active transport requires energy.
D. Passive transport requires energy.
Answer:
C
Explanation:
Active transport requires energy, while passive energy does not.
What secretion helps waste to move through the large intestine?
Answer:
I'm almost certain that it's mucus. (been a hot sec since I took a bio or anatomy class)
Explanation:
Here's a quote: "The colon secretes mucus to bind and lubricate the food waste to help it pass through smoothly as it is dehydrated." -the Cleveland Clinic
The Lorax tried talking the Once-ler out of chopping down the Truffula trees, until some event occurred. What happened that convinced the Once-ler he was right
His business failing was the reason why he was convinced that he was right to chop down the tree.
What is Chop?This is defined as the process in which a substance such as a tree is cut down through the use of tools.
Once-ler business failed and he felt chopping down the Truffula trees will result in him having money through the sales of the resources.
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Please help ASAP
Write the characteristics in which porifera differ from the characteristics of animal kingdom?
Answer:
see the file attached!!
In addition to cytoplasm, most human body cells also have.
Answer:
Nucleus
Explanation:
There are many answers but some are :
Nucleus , Cell membrane , mitochondria , ribosomes
Hope this helped and have a good day
All cells contain cytoplasm, which is made up of cytosol, a jelly-like substance. The cytosol holds the internal structures in suspension.
What is the function of cell organelle in different cells?In addition to the nucleus, eukaryotic cells also have other organelles. An organelle is a cytoplasmic structure that serves a specialized purpose for the cell.
For instance, organelles called vacuoles store materials in the cell, whereas organelles called mitochondria supply energy.
The space between the plasma membrane and the nuclear envelope is known as the cytoplasm in eukaryotic cells, which have a nucleus.
The term “cytoplasm” refers to the entire inside the plasma membrane in prokaryotes, which are without a nucleus.
Therefore, Some cells additionally have a nucleus, cell membrane, mitochondria, and ribosomes in addition to their cytoplasm.
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What is the role of gravity in our solar system?
Choose 1 answer:
Earth's gravity causes the sun and the other planets to revolve around it.
The sun's gravity causes Earth and the other planets to revolve around it.
Our solar system's gravity causes other star systems in the galaxy to revolve around it.
In terms of natural selection what is the best description of an organism that is fit
Answer:
The organism is physically stronger than competing organisms.
Explanation:
What is the difference between a food chain and a food web?
A. A food web shows multiple food chains that are interconnected.
B. A food chain shows multiple food webs that are interconnected.
C. A food chain is used when there are no decomposers present, a food web includes them and shows the recycling of nutrients.
D. A food web is only used when organisms that have multiple ways of getting energy are involved, such as Omnivores.
Answer:
A
Explanation:
A food web shows multiple food chains that are interconnected.
Why isa DNA replication regarded as semi conservative?
Answer:
each helix that is created contains one strand from the helix from which it was copied.
Explanation:
Identify the vascular tissues.
a. ___________
b. ___________
Answer:
The right answer to that is
a. phloem
b. xylem
Explanation:
In this vascular tissue, the vascular bundle is a ring, with the larger xylem cells in the center and the smaller phloem cells to the outside.
I had a hard time knowing the answers for this question, but I finally understand.
So, hope you believe, cause I read this in my school books.
Have a good day!!!
The person who answered on top had the write answers, but not on the right letters.
The vascular tissues identify as:
a. phloem
b. xylem
What are Vascular tissues?Vascular tissues in plants are specialised tissues which transport nutrients and water through the plant. They are made up of two distinct kinds of tissues: xylem and phloem.
Xylem is in charge of carrying water and minerals that are dissolved from the plant's roots to its leaves. It is made up of many cell types, such as tracheids, vessel components, and fibres. Tracheids and vessel elements are long, hollow structures that create lengthy tubes when stacked end to end.
Sugars and other organic compounds are transported from the leaves to the remainder of the plant by phloem. There are two sorts of cells in it: sieve tube elements and cell companions. Sieve tube components are long, narrow cells that run end to end.
Therefore, the vascular tissues identify as:
a. phloem
b. xylem
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List all the categories humans belong to starting with life and ending with species name.
List all the categories humans belong to starting with life and ending with species name.
1. life
2. eukarya
3. animalia
4. chordata
5. mammals
6. primates
7. hominid
8. homo
9. sapiens
Just in case anyone needed it!!
The categories can be ordered as life, Eukarya, Animalia, Chordata, Mammalia, Primates, Hominid, Homo, sapiens.
What is classification?Classification is the ordering of organisms based on the similarities in their characteristics.
In case of humans the categories includes:
Kingdom – Animalia.Phylum- Chordata.Class- Mammalia.Order – Primates.Family – Hominidae.Genus – Homo.Species – sapiensThus, this is the categories humans belong to starting with life and ending with species name.
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The human body depends on food to build and maintain.
1. Those who were successful in Round One did not survive equally well when others were
competing for food at the same dish during round two. Which beak was not successful and why?
Large beak will not be successful if the food is small in size because they can't eat that food.
Which beak was not successful and why?
Large beak was not successful if there is small sized food is present on the dish while on the other hand, if the dish has big sized food then the small beak can't survive the second round because they are unable to eat that food.
So we can conclude that big beak will not be successful if the food is small in size because they can't eat that food.
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Drinking alcohol during pregnancy negatively impacts development of the fetus because
Most of the compounds that make up life contain the element:
Answer:
Carbon.
Explanation:
Carbon forms the basis for all life on Earth; indeed, life forms on Earth are referred to as carbon-based life forms, emphasizing the importance of this element for life. Carbon atoms readily bond to other atomic elements, such as oxygen and nitrogen.
The energy required for organisms to respond to the environment comes from:.
The energy required for organisms to respond to the environment comes from the sun.
What is the importance of the Sun in the ecosystem?Light energy, which also comes from the Sun, is essential for photosynthesis, a process in which green vegetables transform carbon dioxide and water into glucose, lipids, proteins, vitamins, nucleic acids, releasing oxygen into the atmosphere.
The sun is the basis of life, because if we analyze the food chain, its base comes from the photosynthetic beings that provide food for this chain to occur.
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What is one reason water can remain in the liquid state on Earth?
A. Earth's atmosphere is deep enough to allow water to cycle through
its solid, gas, and liquid states.
OB. Earth's surface is continually bombarded by comets, which add
liquid water.
OC. Earth's distance from the sun keeps the temperature just right for
liquid water to exist.
OD. Earth's atmosphere is warm enough to prevent water vapor from
condensing.
SUBMIT
Answer:
c
Explanation:
water boils at 100 degrees Celcius and freezes at zero degrees Celcius. if you want to keep water in a liquid phase, the temperature has to be between 0 and 100 therefore earth is the only planet that is able to keep water in a liquid phase as it is not too hot nor too cold
1. Why is Maya Lim excited about classroom bioprinters? 2. What parts of Maya Lim's job as a chemical engineer sound interesting to you?
Classroom bioprinters can be used to print literally any biological object, whereas a chemical engineer is responsible to use chemistry to develop processes and devices.
What is a bioprinter?A bioprinter is a device that combines cells and transcriptional growth factors, in order to generate structures similar to tissues and organs.
Moreover, a chemical engineer is aimed at exploring the chemical properties of matter to develop processes and devices.
In conclusion, classroom bioprinters can be used to print literally any biological object, whereas a chemical engineer is responsible to use chemistry to develop processes and devices.
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