BIOLOGY HIGH SCHOOL

What effect would an increase in temperature have on the rate of osmosis in these cells

Answers

Answer 1
Answer:

An increase in temperature would increase the rate of osmosis in cells. This is because the higher temperature would increase the kinetic energy of the water molecules, making them move faster and more easily across the semi-permeable membrane.

The rate of osmosis is affected by a number of factors, including temperature, concentration gradient, and membrane permeability. The temperature is the most important factor, and a 10°C increase in temperature can typically double the rate of osmosis.

In cells, the water concentration is typically higher outside the cell than inside the cell. This creates a concentration gradient, which drives the movement of water into the cell. The membrane surrounding the cell is semi-permeable, which means that it allows water molecules to pass through but not other molecules, such as solutes.

Therefore, An increase in temperature would increase the rate of osmosis in cells.

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Answer 2
Answer:

Answer:

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Explanation: Factors Affecting the Rate of Osmosis

Temperature - The higher the temperature, the faster the movement of water molecules across the semi permeable membrane.

Osmosis is the passage of water from a low solute concentration area through a semi-permeable membrane to a high solute concentration area to equalize the solute concentrations on both sides. Meaning of the terms: solute, solvent and solution. A solvent is the base substance, where a solute is being dissolved and the result is the solution. Through osmosis, water is provided to the cells of your body; it plays a significant role in the preservation of life. It is this process that helps plants receive water and is even used in kidney dialysis.

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A student encounters a plant bearing small, purple flowers in the wild. The size of the flowers and the purple color are determined by two separate genes. The genes for both small size (S) and purple color (P) are dominant to large size (s) and white color (p), respectively. The student wants to determine the genotype of the newly isolated plant. Crossing to which of these plants would provide the most information in one generation? A. SSPP
B. SsPp
C. sspp
D. SSpp

Answers

Answer:

C. sspp

Explanation:

  • Crossing a plant of an unknown genotype with the one that is homozygous recessive for that gene is useful for revealing the unknown genotype and this is known as a testcross.
  • The result of the test cross can reveal whether the organism's genotype.
  • If the offspring of the cross shows dominant phenotype then the parent must be homozygous dominant and if the offspring shows recessive phenotype then the parent must be heterozygous.

Answer:

The answer is C.

Explanation:

Which brain structure relays information from the eyes to the visual cortex? A) Amygdala B) Medulla C) Hippocampus D) Thalamus

Answers

Answer is D) Thalamus

After cell division each daughter cell hasa.a lower surface area/volume ratio than the parent cell
b.a higher surface area/volume ratio than the parent cell
c. more DNA in its nucleus than the parent cell
d.less DNA in its nucleus than the parent cell

Answers

The surface area to volume ratio will be higher as compared to the parent cell after cell division. Hence, option B is correct.

Further Explanation:

Cellular division is known to be the process through which the parental cell segregates into two or more daughter cells. This process generally occurs as a segment of a larger cell cycle. It comprises of 2 main stages, interphase and M-phase. Interphase is further segregated into:

  1. G1 phase wherein the cell prepares itself for the upcoming events.
  2. S phase is the phase where DNA synthesis occurs
  3. G2 phase is the phase wherein the cell gets ready for the M phase.  

M phase or mitotic phase is the next stage after interphase and is segregated into 4 phases:

  1. Prophase is the first event which occurs and in this the nuclear envelope disappears, mitotic spindle formation starts, and chromosome condensation begins.  
  2. Metaphase is wherein the alignment of chromosome occurs on the equatorial plate.  
  3. Anaphase is the phase wherein the chromosomes segregate towards the opposite ends
  4. Telophase is the final stage and division of the two daughter cells is completed.  

During cellular division, the cell segregates into 2 daughtercells and as the cell becomes larger, the volume elevates rapidly as compared to its surface area. Hence, option B is correct. The reduction in the cell’s ration of the volume to surface area makes it difficult for the cell to transport the required substances in and move out the waste products quickly enough for the cell to survive.

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Answer Details:

Grade: High school

Subject: Biology

Chapter: Cell Division

Keywords:

Cell division, cellular division, interphase, cell cycle, metaphase, M phase, G1 phase, prophase, G2 phase, telophase, S phase, anaphase, surface area, volume, ratio.

Final answer:

OPTION A.

After cell division, each daughter cell has a higher surface area/volume ratio than the parent cell. This is due to the division resulting in two smaller cells with same DNA content. This increased ratio is beneficial for the exchange of material across cell membrane.

Explanation:

After cell division, each daughter cell has a higher surface area/volume ratio than the parent cell. When a cell divides, it splits into two smaller cells, reducing the volume but not reducing the surface area in the same proportion. This results in each daughter cell having a larger surface area relative to its volume. This increased ratio is important because it allows for more efficient exchange of nutrients and waste products across the cell membrane.

The amount of DNA in each daughter cell is the same as in the parent cell because during cell division, the DNA is copied and then distributed evenly between the two resulting cells. Therefore, option c and d are incorrect.

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What’s the definition of polyunsaturated fats

Answers

Answer:

Polyunsaturated fat is a type of dietary fat.It is one of the healthy fats,along with monousaturate fat. Polyunsaturated fat is found in plant and animal foods such as salmon,vegetable oils,and some nuts and seeds
Polyunsaturated fats are a type of healthy fat that includes omega-3 and omega-6 fatty acids, which are essential for brain function. You must obtain them from food, as your body cannot make them.


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A place where living and nonliving things interact, such as forests and deserts is called a(n)ecosystem

population

community

habitat

Answers

Answer: ecosystem

Explanation:

In peas, yellow seed color (Y) is dominant to green seed color (y). A homozygous green pea plant is crossed with a heterozygous yellow pea plant. What is the predicted phenotypic ratio of the offspring

Answers

Answer:

2: 2 or 1:1

Explanation:

It is given that the yellow seed color is dominant over green seed color. The genotype of homozygous green pea plant and heterozygous yellow pea plants are “yy” and “Yy” respectively.  

The following punnet table represents the cross between “yy” and “Yy”

y y

Y Yy Yy

y yy yy

The genotypic ration is 2Yy :2yy

Yy represents heterozygous yellow pea plant

yy represents homozygous green pea plant  

yellow pea plant : green pea plant is equal to 2: 2 or 1:1

Each offspring will receive one allele from each parent, so the cross will be Yy with yy, resulting in four possible offspring: Yy, Yy, yy, and yy. Since Y is dominant to y, there will be two yellow for every four offspring or the ratio of 1/2 (Look up Punnet squares to understand this concept better)
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