Answers
Answer:
A. The level of sucrose solution will rise in the glass tube because water molecules will pass through the semipermeable membrane into the tube as water potential is higher outside than inside the tube.
B. The apparatus can be modified to measure the rate of osmosis at different temperatures by doing the following :
1. Using a waterbath in order to heat the water and a thermometer to measure different temperatures.
2. Using a scale such as a ruler attached to the glass tube to measure the increase in height at different temperatures.
3. Using a stopwatch to record time taken for unit increase in the height of waterat different temperatures.
Explanation:
A. Osmosis is the movement of water molecules from a region of low solute concentration or high water potential to a region of high solute concentration or low water potential through a semipermeable membrane until equilibrium concentration is attained.
The movement of water molecules is based on a concentration gradient, from a region where there are more water molecules to a region where there are fewer water molecules.
The sucrose solution has a higher solute concentation but lower water potential due to fewer water molecules compared to water in the beaker, therefore, water molecules will pass through the semipermeable membrane into the glass tube resulting in an increase in the level of sucrose solution in the glass tube.
B. The apparatus can be modified to measure the rate of osmosis at different temperatures by doing the following :
1. Using a waterbath in order to heat the water and a thermometer to measure different temperatures.
2. Using a scale such as a ruler attached to the glass tube to measure the increase in height at different temperatures.
3. Using a stopwatch to record time taken for unit increase in the height of waterat different temperatures.
Related Questions
1. identify the organelle that regulates cell function and contains the dna
A. Nucleus
B. mitochondria
C. golgi apparatus
D. cell membrane
Answers
Answer:
the organelle that regulates cell function and contains the DNA is a nucleus
The lipases catalyze the hydrolysis of fats and other carboxylic acid esters. The lipases illustrate the fact that:
Answers
Answer:
Lipase is an enzyme that helps in the catalysis of the hydrolysis of fats and other carboxylic acid esters. Lipases act/functions according to the substrate molecule constituent and how similar the chemical linkages are.
Lipase action on fats and carboxylic esters which are different molecules but with similar chemical constituents and bonds explains enzyme action only some unique bonds in a compound.
PLEASE HURRY, WILL GIVE BRAINLY TO CORRECT ANSWER!
which of the following makes it difficult to reach and explore the outer planets?
1. the surfaces are too icy and slippery to land on.
2. they contain a lot of helium in their atmospheres.
3. massive storms with fast winds cover the surfaces.
4. none of the above.
5. both 1 and 2
6. both 2 and 3.
Answers
Answer:
6 is the most prefarable
Explanation:
An electric current is generated when a coil of wire passes through a magnetic
field. A device for detecting this current is a
1 generator
2 turbine
3 calorimeter
4 galvanometer
Answers
what is called vulva explain with relevant images please
Answers
Answer:
Explanation:
The external organs of the female reproductive system is called vulva.
Australia and New Zealand have a wide array of plants and animals found nowhere else because those organisms evolved in _____. Question 9 options: in the Southern Hemisphere
Answers
Answer:
These organisms evolved inside these countries.
Explanation:
Organisms evolved inside Australia and New Zealand countries because these two countries are isolated means there is no way for the movement of crops or animals from other regions into these environment. There is a big ocean present between these countries and other countries so the organisms only evolved inside these two countries not from the outside environment.
how does phagocytosis occur in the lungs?
Answers
Answer:
Phagocytic defense in the normal lung is shared principally by two kinds of cells - alveolar macrophages that reside on the air surface and roam the alveoli and PMNs that circulate in the intravascular space or are stored transiently in areas adjacent to the capillary-alveolar interface (marginated in capillaries)
Explanation:
mark brainliest pls
1. Much of the behavior of all primates is learned. Nonetheless, we have suggested many times that primate behavior has been shaped by natural selection. How can natural selection shape behaviors that are learned
Answers
Answer:
Nature selects best suited organisms having behaviours that help in the survival of organisms in that environment.
Explanation:
Natural selection can shaped the behaviors that are learned by the organisms because these behaviours helped organisms in their survival. Those organisms will be selected by the nature which can withstand the changing environmental conditions. Organisms adopt different behaviours in order to survive harsh environmental condition and these behaviour shaped by the natural selection in that organism so that they survive and grow in that environment.
Joe and Sam were adopted as infants into different families. They have just met and noticed how much they look alike. They are also the same age and suspect that they are twins who were separated at birth. They wish to know the truth, so have their DNA analyzed. Study this DNA fingerprint (RFLP method) and write a short essay that answers the following questions:
a. In the last column of the DNA fingerprint, what does "frequency of occurrence" mean?
b. What is the probability that Joe and Sam are not twins (i.e., that the DNA in the fingerprints could have come from unrelated men)?
Answers
Answer:
Explanation:
The missing diagram in the question is attached in the image below.
(A)
From the image below, the frequency of occurrence is shown in the last column.
The frequency of occurrence means the particular band for the entire whole population.
As an example:
1 in 15 frequency of occurrence means; ⇒ One (1) out of every fifteen (15) people has the band.
1 in 450 frequency of occurrence means; ⇒ One (1) out of every 450 people has the band.
(B)
However, Let the probability that Joe and Sam are twins be = A
and the probability that they are not twins be denoted with B;
Then;
P(B) = 1 - P(A)
where;
P(A) = Probability of specific bands appearing on the gel in every one of them
[tex]P(A) =\Big( \dfrac{1}{15}\times \dfrac{1}{15}\Big)\times \Big( \dfrac{1}{450}\times \dfrac{1}{450}\Big)\times \Big( \dfrac{1}{32}\times \dfrac{1}{32}\Big)\times \Big( \dfrac{1}{70}\times \dfrac{1}{70}\Big)[/tex]
[tex]P(A) =\Big( \dfrac{1}{225}\Big)\times \Big( \dfrac{1}{202500}\Big)\times \Big( \dfrac{1}{1024}\Big)\times \Big( \dfrac{1}{4900}\Big)[/tex]
P(A) = 4.37 × 10⁻¹⁵
∴
P(B) = 1 - P(A)
P(B) = 1 - 4.37 × 10⁻¹⁵
P(B) ≅ 1
What are the long cells called Tracheids
Answers
the soil will move farther when you pour water_________
gradually or rapidly
Answers
Answer:
The soil will move farther when you pour water gradually.
ANSWER FOR BRAINLIEST
Look at the image below.
Answers
During frog gastrulation, involution occurs at the Group of answer choices endometrium. blastopore blastocoel. trophoblast. archenteron.
Answers
Answer:
blastopore
Explanation:
Involution is the second stage after invagination during frog gastrulation. Involution occurs at the blastopore when the marginal zone cells get to the tip of the blastopore, make an inward turn and then move along the inner exterior of the outer cells sheets.
This means that the cells found at the lip of the blastopore and always undergoing change and the first of these cells to develop into the dorsal lip are the endodermal cells. Next are the mesoderm cells that form the Notochord.
Match the answer with the statement about promoters and enhancers. Group of answer choices Responsible for regulating translation. [ Choose ] Transcription machinery does not assemble at _______________.
Answers
Answer:
Neither
Chromatin
Explanation:
Both promoters and enhancers are generally regulating transcription. They are not regulating in translation. They are not responsible for regulation in translation.
Transcription machinery assemble at naked eukaryotic DNA. They do not assemble at DNA chromatin.
When compared to eukaryotic cells, prkariotic cells
Answers
Answer:
Explanation:
Eukaryotic cells and prokaryotic cells have massive differences. Eukaryotic cells are more complex, contain true nucleus, and contain membrane bound organelles. Prokaryotic cells lack nucleus and membrane bound organelles, they are also simpler when compared to eukaryotic cells.
Fire and Mello conducted an experiment where they added no gene X RNA (b), anti-sense gene X RNA (c) or double stranded gene X RNA (d) to C. elegans embryos. They then did a hybridization experiment examining gene X mRNA levels in the embryo. Square (a) is a no probe control. How does this act as a control
Answers
Answer:
The correct answer is - It shows that an RNA probe is necessary to get a signal.
Explanation:
A probe is a specific single-stranded sequence of DNA or RNA that recognizes its complementary sequence in a particular sample genome for synthesis. The RNA probe is placed into close contact with the given sample under a specific environment that allows the RNA probe sequence to hybridize with its complementary sequence.
In this case, square a is the condition where no RNA probe is persent whereas all three other conditions have some sort of RNA probe, however, in C there is no Gene X probe but their probe present. To get a signal in hybridization RNA probe is required and that can be used as control as it can be used to compare if a signal is received or not.
NO LINKS OR ELSE YOU'LL BE REPORTED!Only answer if you're very good at science.
Why is a sound wave a mechanical wave?
Answers
Answer:
a sound wave moves through air by displacing air particles in a chain reaction, sound energy is associated with vibrations created by a vibrating source, that requires a medium to travel, which makes sound energy a mechanical wave
Explanation:
hoPE that helped :)
Answer:
Mechanical waves move "things"...they require a medium (whose molecules are the "things") to transmit their energy. Sound uses air molecules most of the time. It can use water molecules as well.
Explanation:
The age of rock as determined by the other rock surrounding it is known as ______________.
A) absolute age
B) carbon dating
C) Law of Superposition
D) relative age
Answers
Answer:
B)CARBON DATING
Explanation:
BEST ANSWER GETS BRAINLIEST!!!!!!!!
Each trait a person has, such as eye or hair color, is ultimately the result of a single allele in DNA.
True
False
Answers
Answer:fałsz
Explanation:
Answer:
False
Explanation:
I just took the test
What happens to animals because of plastic trash in the ocean ?
Answers
Answer:
They suffocate and choke because of the plastic waste, they also feel trapped in there and sometimes smaller animals get stuck in there
Answer:
Fish, seabirds, sea turtles, and marine mammals can become entangled in or ingest plastic debris, causing suffocation, starvation, and drowning. ... Plastic waste kills up to a million seabirds a year. As with sea turtles, when seabirds ingest plastic, it takes up room in their stomachs, sometimes causing starvation.
Explanation:
What adaptations do desert animals have that help them survive the hot dry desert?
Answers
Answer:
animals also have to cope i the desert, using adaptations such as being nocturnal or living under ground to survive. camels often live in deserts that are hot and dry during the day, coping with wind-blown sand and cold at night. slit-like nostrils and two rowa of eyelashes to help keep the sand out of their eyes.
oii-xepq-sxi come on fast...
Answers
Answer:
nnnoooo
Explanation:
Identify the organelle that regulates cell function and contain the DNA?
A. nucleus
B. Mitochondria
C. golgi apparatus
D. cell membrane
Answers
Answer:
A. nucleus
Explanation:
The nucleus is particularly among the eukaryotic organelles because it is the location of the cell DNA two other critical organelles are mithochondrua and chloroplast ,which play important role in energy conversation and are through to their evolutionary origin as simple single called organism
When hydrogen is burned, it reacts with oxygen and produces
O carbon dioxide
O water
O oll
O hellum
Answers
Please explain how shade-adapted plants tend to differ from sun-adapted plants, using the terms: specific leaf area, dark respiration, root mass fraction, leaf lifespan.
Answers
Answer:
Thickness and number of chlorophyll.
Explanation:
Shade-adapted plants differ from sun-adapted plants due to many characteristics such as thickness and number of chlorophyll. Sun leaves are more in thickness than shade leaves because they develop longer palisade cells. Shade leaves generally have more chlorophyll as compared to sun-adapted plants. Specific leaf area and root mass fraction of Shade-adapted plants are higher as compared sun-adapted plants due to large number of chlorophyll to harvest more sunlight for photosynthesis. Dark respiration is higher in sun-adapted plants when there is darkness as compared to shade-adapted plants which produce food in no direct sunlight.
Envy plant yellow seed color is dominant in greeting color is recessive what will the generations look like assume that Mandel's method of Crossing reading parents with opposite traits is followed check all that apply
Answers
Options please! Otherwise how are we supposed to help you, sorry.
List three different types of posttranslational modifications that may happen to a protein and the significance of each in the context of protein function.
Answers
Explanation:
These modifications include phosphorylation, glycosylation, ubiquitination, nitrosylation, methylation, acetylation, lipidation and proteolysis and influence almost all aspects of normal cell biology and pathogenesis.
wood burning
cooking an egg
making Kool Aid
water boiling
copper plating a nail
melting sand to make glass
are these chemical or physical changes
Answers
These are physical change examples
Which statement is true of human cultures? O A. All human societies share the same cultural traits and practices. O B. Every human has a unique set of cultural traits and practices. O C. Culture includes a society's knowledge, customs, and achievements. O D. Cultures are groups of people united by blood relationships. SUBMIT
Answers
Answer:
B. Every human has a unique set of cultural traits and practices.
Explanation:
Culture can be defined as the general way of life of a group of people living together in a particular location or society.
Basically, culture comprises of beliefs, values, behaviors, language, dressing, cuisine, music, symbols, arts, social habits, knowledge, customs, laws pertaining to a particular group of people living together in a society.
This ultimately implies that, culture are acquired and passed from one generation to another.
A cultural trait can be defined as the smallest characteristics of human activity (actions) that is mainly acquired socially and transmitted from one generation to another through various modes of communication.
This ultimately implies that, these unique behavioral informations or characteristics and beliefs acquired by people socially are transmitted from one individual or group of people to another.
Hence, the statement which is true of human cultures is that every human (race) has a unique set of cultural traits and practices that were acquired from the environment and society.
what is shown on the y-axis in this figure variation within treatment
Answers
Explanation:
Temperature is shown on y-axis