A student examines a thin section of an onion-root tip and records the number of cells that are in each stage of the cell cycle. She observes 93 cells in interphase, 15 cells in prophase, 4 cells in metaphase 6 cells in anaphase and 2 cells in telophase. If the complete cell cycle in an onion-root tip cell requires 24 hours, what is the average duration of each stage in cycle?

Answers

Answer 1

Answer:

given:

Total number of cells in all stages = 93+15+4+6+2 = 120

Total time = 24 hours.

solution:

Percentage of cells in interphase

= 93 * 100 / 120 = 77.5%

 in prophase

=15 * 100 / 120 = 12.5%

 in metaphase

= 4 * 100 / 120 = 3.33%

 in Anaphase

= 6 * 100 / 120 = 5%

 in telophase

= 2 * 100 / 120 = 1.66%

The percentage of cells present in various phases exhibits the time spend by each cell in that phase.

Total minutes

= 24*60 = 1440

Total minutes spent in interphase

= 77.5 * 1440

= 1116 minutes

in prophase =12.5 *1440

=  180 minutes

 in metaphase = 3.33*1440

=  48 minutes

in Anaphase = 5*1440

= 72 minutes

 in telophase = 1.66*1440

=  24 minutes


Related Questions

The bone cell of a goat contains 60 chromosomes.How many chromosomes will be in each daughter cell after mitosis

Answers

Since these are not game țes, the chromosomes will be in the same number:60

The bone cell of a goat contains 60 chromosomes, so there will be 60 chromosomes in each daughter cell after mitosis, as mitosis is the cell division that will produce daughter cells with the same genetic contents.

What exactly is mitotic cell division?

The cell divides during mitosis, and the daughter cells formed have the same genetic content as the parents, here, two daughter cells are formed, with the bone cell having genetic content same as original bone cell. Because the duplicated chromosomes are separated equally by the spindle fibers without crossing over or recombination, 60 chromosomes will form that is the same number of chromosomes after mitosis.

Hence, the bone cell of a goat contains 60 chromosomes, so there will be 60 chromosomes in each daughter cell after mitosis, as mitosis is the cell division that will produce daughter cells with the same genetic contents.

Learn more about mitotic cell division here.

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Write a 200-word report on your research, using proper grammar, correct spelling, and appropriate punctuation. Make sure you include:

A definition of overgrazing
A discussion on the damage overgrazing can cause
The advantages and disadvantages of each type of grazing
A discussion on the type of grazing you select to use, which includes your justification of why you selected the grazing strategy

Answers

Answer:

answer is in explanation before

Explanation:

Overgrazing occurs when plants are exposed to intensive grazing for extended periods of time, or without sufficient recovery periods. It can be caused by either livestock in poorly managed agricultural applications, game reserves, or nature reserves. Overgrazing combined with overstocking has the most damaging outcomes to the world’s natural environment. The scarcity of water resources, water pollution, degeneration of coral reefs, and eutrophication are all connected to overgrazing. The chief polluting elements include farm chemicals and animal wastes.

Types of grazing systems 1. Types of grazing systems Grazing animals (such as cattle, sheep and goats) feed on the leaves and shoots of grass... 2. Zerograzing In this type of grazing system, the animals are not allowed to go out into the pastureto graze.

Overgrazing is defined as the practice of allowing too many livestock to graze on a particular area of land for an extended period. This leads to a decrease in the vegetation cover and the soil's capacity to hold moisture, which results in soil erosion and desertification.

What is overgrazing?

There are three types of grazing systems: continuous grazing, rotational grazing, and intensive grazing. Continuous grazing involves leaving livestock on a particular area of land throughout the year. Rotational grazing involves rotating livestock to different areas of land to prevent overgrazing. Intensive grazing involves keeping livestock in smaller paddocks and rotating them frequently.

Hence, overgrazing is defined as the practice of allowing too many livestock to graze on a particular area of land for an extended period. This leads to a decrease in the vegetation cover and the soil's capacity to hold moisture, which results in soil erosion and desertification.

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WILLL GIVE BRAINLIST!!! Suppose mechanical weathering breaks a rock into pieces. How would this affect the rate at which the rock weathers chemically? How do chemical and physical weathering differ? Explain your answer in at least 3 sentences.

Answers

Answer:

Explanation:

Mechanical weathering increases the rate of chemical weathering.

As rock breaks into smaller pieces, the surface area of the pieces increases. With more surfaces exposed, there are more surfaces on which chemical weathering can occur.

Chemical weathering is different from mechanical weathering(physical weathering )  because the rock changes, not just in size of pieces, but in composition.

That is, one type of mineral changes into a different mineral.

Chemical weathering works through chemical reactions that cause changes in the minerals.

Which material would be used if the main criterion was keeping the cost of materials as low as possible? Which material would be used if the main criterion was getting the best performance from the material

Answers

Answer:

Low cost has low quality whereas high cost has high quality.

Explanation:

If the main criterion was keeping the cost of materials as low as possible so he must used the materials of low quality for their work because the low quality materials are made of cheap material while on the other hand, if the main criterion was getting the best performance from the material so he has to used the materials of high quality. The high quality materials are very expensive but its performance is excellent as compared to cheap materials.

explain why aerobic respiration occurs before lactic acid fermentation in most muscles.

Answers

Answer:

When your muscle cells are performing function at an easy relaxed pace they take in oxygen from the blood and prefers to make energy using "aerobic methods", but in extreme conditions such as strenuous exercise without oxygen, the normal aerobic respiration becomes anaerobic and creates lactic acid in order to cope up with the energy needs.

Aerobic respiration occurs when there is insufficient oxygen is present in respiration. If the body does not respire enough, the cells respire anaerobically. During vigorous exercise, muscle cramp occurs due to the production of lactic acid by anaerobic respiration.

Aerobic respiration:Aerobic respiration occurs in the cell of the body.It is the process of cellular respiration that takes place in the presence of oxygen gas to produce energy from food.Water and carbon dioxide are produced as end products.

Thus, we can conclude that aerobic respiration occurs when there is insufficient oxygen present for respiration. if the body does not respire enough, the cells respire anaerobically. During vigorous exercise, muscle cramp occurs due to the production of lactic acid by anaerobic respiration. The acid wears away muscles and causes cramps.

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What particles can move through the dialysis
tubing, do you think?

Answers

Answer:

Glucose, starch and iodine (potassium iodide) will pass through the membrane of the dialysis tubing.

I will Mark you Brainliest for the quickest and correct answer Please help O really need you help

AND NO LINKS PLEASE Rainforestowl PLEASE I AM TALKING TO YOU

Answers

Answer:

it controls which substances enter and leave the cell

Explanation:

Answer:

may be the strength and stiffness

Which organelle of a cell functions similarly to the envelope of a virus and why?
A
cilia - The envelope is found in a similar location on the organism.
B
flagella - The envelope is responsible for the organism's movement.
С
cytoplasm - The envelope contains enzymes that help the organism metabolize substances.
D
cell membrane - The envelope controls the flow of molecules both into and out of the organism.

Answers

Answer:

The answer is D.Cell membrane

4 In your own words, describe the relationship between
the processes and forces that create the different types of rocks

Answers

Answer:The three main rock types are igneous, metamorphic and sedimentary. The three processes that change one rock to another are crystallization, metamorphism, and erosion and sedimentation.

GVC – Understand how humans depend on and affect natural resources.
Learning Targets:
ESS4.1 – Construct an explanation for how the availability of natural resources, the occurrence of natural hazards, and changes in climate affect human activity.
ESS4.2 – Use computational thinking to explain the relationships between the sustainability of natural resources and biodiversity within a system.
ESS4.3 – Design solutions for developing, managing, and utilizing energy and mineral resources based on cost benefit rations on large and small scale
ESS4.4 – Design solutions for a major global or local environmental problem based on one of Earth’s systems.

Answers

Answer:

Hope It Help

Explanation:

That's all I know

Describe how the picture below represents the function of the immune system

Answers

Answer:

The Human Immune system helps fight bacteria and germs and viruses because without the Immune system we could die it is what protects us from The flu and sometimes cov id with a weak immune system we might no survive.

Explanation:

What are examples of Health Informatics workplaces? Check all that apply.

a home office
a hospital cafeteria
a laboratory in a university
a medical clinic’s front office

Answers

Answer:A home office

A medical clinic’s front office

Explanation:

Answer:

Select them all if its "what seems interesting" and Home office and medical front if its What are examples of Health Informatics workplaces? Check all that apply.

Explanation:

What prevents a lake or ocean from freezing solid?

Answers

Answer:

The surface layer of the water freezes solid creating a barrier that insulates the ice below so that it keeps a steady temperature usually a few degrees above freezing (32 degrees).

Explanation:

write adjective forms of :

1)silence
2) Blessing
3) tenderly
4) money​

Answers

Answer:

Explanation:

silence- speechless

blessing- mystical and great

tenderly- soft

money- grubber

The adjective form of

Slicence is silentBlessing is blessedTenderly is tenderMoney is monetary

Adjective

Adjectives are those words that are used to describe or modify nouns or pronouns.

There are three forms of adjectives.

They are: absolute, comparative, and superlative.

Learn more about adjectives:

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what is chemical weathering? what are some facts? ​

Answers

Answer:

Chemical weathering is the erosion or disintegration of rocks, building materials, etc., caused by chemical reactions (chiefly with water and substances dissolved in it) rather than by mechanical processes.

Explanation:

1. There are four types of chemical weathering: Reaction with water, Reaction with acid, Reaction with oxygen, and Reaction with organisms.

2. Chemical weathering occurs when water dissolves minerals in a rock, producing new compounds. This reaction is called hydrolysis. Hydrolysis occurs, for example, when water comes in contact with granite. Feldspar crystals inside the granite react chemically, forming clay minerals.

I only have 5 minutes!!!!! Help no websites help me ASAP fill in the blank and don’t answer it if you don’t now

Answers

Answer:

i think it's element

Explanation:

Enzymes work fine at any range of temperatures.
A. True

B. False

Answers

The answer is True

Because enzymes can change depending on thee temperature

Answer:

False

Explanation:

Enzymes work best within specific temperature and pH ranges, and sub-optimal conditions can cause an enzyme to lose its ability to bind to a substrate. However, extreme high temperatures can cause an enzyme to lose its shape (denature) and stop working.

Why is the water cycle important for ecosystems?(1 point) The water cycle helps recycle and transport carbon around the planet. The cycle replenishes the carbon supply of ecosystems. The water cycle uses photosynthesis to make clouds. These clouds make surface water that animals drink to survive in their ecosystem. The water cycle permanently removes water from underground and large bodies of water and transports it to terrestrial ecosystems that need water. The water cycle helps recycle and transport water around the planet. The cycle replenishes the water supply of ecosystems

Answers

Answer: The water cycle helps recycle and transport water around the planet. The cycle replenishes the water supply of ecosystems

Explanation:

The water cycle simply refers to how water continuously move within the Earth. It is also called the hydrological circle. Water cycle depicts many processes such as how water evaorates into vapor, how clouds are formed through condensation and then sent back to the Earth as either rain or snow.

Based on the options given, the water cycle helps recycle and transport water around the planet. The cycle replenishes the water supply of ecosystems.

Answer:

The water cycle helps recycle and transport water around the planet. The cycle replenishes the water supply of ecosystems

Explanation:

trust me i did the test

A population of lowers is separated by an eight-lane superhighwax, Pollen is often camed by the
and across the highway and can pollinate the flowers on the other side of the highway Can speciation

occur in this situanon2
No because the populations are not reproductively isolated
Ne because the populanons are not geographically isolated
Ces because the populations are reproductively isolated
Yes because the populations are geographically isolated
DONE
Fr

Answers

Answer:

hi

Explanation:

Answer: A) No, because the populations are not reproductively isolated.

Explanation:   :)

Which diseases would individuals have the greatest difficulty preventing in themselves?

Answers

Answer: Cystic fibrosis-genes

Explanation:

Trust me that’s the answer

Pollen and Ovules are gametes. How many chromosomes would they have compared to the rest of the plant's body cells? What process made them that way?

Answers

Answer:

a. They would have half chromosomes as much as the plants body cells.

b. Meiosis

Explanation:

Gametes are sex cells produced only in sexually reproducing organisms. In plants as stated in this question, male gametes are contained in pollens while female gametes are contained in ovules. The process by which these gametes are made is called MEIOSIS.

Meiosis is a cell division that reduces the chromosomal number of the parent cell by half. This means that each GAMETE will contain half the number of chromosomes as the parent cell. Fir example, if the body cell of a plant contains 30 chromosomes, each gamete formed via Meiosis in that plant will have 15 chromosomes.

In a nutshell, pollen and ovules, which are gametes of plants formed by MEIOSIS would have half chromosomes as much as the plants body cells.

Identify how information for specifying the traits of an organism is carried in the DNA.

Answers

Answer: DNA carries all of the information for your physical characteristics, which are essentially determined by proteins. So, DNA contains the instructions for making a protein. In DNA, each protein is encoded by a gene (a specific sequence of DNA nucleotides that specify how a single protein is to be made).

Explanation:

The traits or characters are present in the DNA in the form of genes. Genes are short stretches of nucleotides present in DNA and represent the encoded message that is present in the individual.

What is a gene?

Genes are present in the DNA. It carries information about the traits that are expressed in an individual. Genes come from parents to offspring, so they are hereditary and pass from one generation to the next. From DNA, mRNA is formed from the gene by the process of transcription.

This mRNA is again converted to proteins or polypeptides by the process of translation. This product is the result of the message that is present in the gene. Example: melanin pigment and skin color variation. As different persons have variations in their genes, the production of this melanin protein synthesis varies, and as a result, skin color among individuals varies.

 

Hence, the information for specifying the traits is carried by genes present in DNA.

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Use the weather map below that shows areas of High and Low Pressure to help you answer the question.



Which location is likely experiencing the most WIND

Answers

Answer:

B because its inside the circles

please help me with all questions and in case you can not see the questions it is

1. Write the complementary DNA for the following sequence:
ATG TGG ATC GTA


2. Write the mRNA for the following DNA sequence:
ATG TCG ATA AAC


3. The mRNA sequence is used to make amino acids, which are the building blocks of proteins. Use the chart below to identify the amino acids made by the following mRNA sequence:
AUG UCG AAG UAC

Answers

1. TAC ACC TAG CAT
2. UAC AGC UAY UUG
3. AUG : STOP UCG: SERine AAG: LYSine UAC: TYRrosine


I also wanted to explain why I only capitalized the first there letter of the amino acids, reason is bc the whole word isn’t required. Some teachers might teach you to only put the first three words. But I put the whole word in case that wasn’t the case. Hope this helps !!

In 1989, a tanker carrying oil struck a reef and spilled 11 million gallons of oil in an
Alaskan bay. The oil not only spilled into the harbor, but also washed up on the
shoreline. The spill killed millions of fish, birds that lived on the shore, sea otters,
porpoises, seal lions and many whales. Every form of life in the area was affected.
Scientists have carefully studied the area and its species since the initial spill to
determine both short-term and long-term effects.
Which of the following was affected the least by this catastrophic event? A: Plants along the shoreline B: Fishermen in the area C: Migratory sea birds D: Crustaceans that lived on the bottom of the bay

Answers

Answer:

The answer is C: Migratory sea birds.

Explanation:

Sea birds that are migrating would not only just fly above the spill and nestle on the trees, but they could eat crabs and other animals that scurry around on the shore as a food source due to the death of their primary source of food, fish.

I need URGENT help with 16 through 18 pls!!!

Answers

Answer:

16. Directional Selection

17. Disruptive Selection

18. Stabilizing Selection

19. Natural Selection

20. Adaptation

Explanation:

In population genetics, directional selection/positive selection is a mode of natural selection in which an extreme phenotype is favored over other phenotypes.

Disruptive Selection would show phenotypes (individuals with groups of traits) of both extremes but have very few individuals in the middle.

Stabilizing Selection. Occurs when individuals at the extremes of the range of characteristic are selected against. This means that the "average" individuals are selected for.

What one is not a problem related to the timber industry?
B
chemicals are dumped in the lakes and rivers
A
destruction of animal habitats
D
Clear cutting
с
reduces water quality and erodes the soil

Answers

Answer:

chemicals are dumped into lakes and rivers

Explanation:

all the other choices are results of cutting down trees

Answer:

A chemicals are dumped in the lake and river

the most significant problems for U.S. national parks.

Answers

In 20 years, many of the country's 411 national parks, monuments and historic sites will suffer damage as sea levels rise, wildfires rage, glaciers melt and iconic wildlife, such as grizzly bears in Wyoming and pikas in Colorado's high-altitude tundra face shrinking habitat and scarce food.


Hope this helps you if I am wrong sorry
Have a great day!

Ms. B has 32 students assigned to her class. Her room only holds 28 students. The other 4 need to go to the officer for a schedule change-

Northern pike (a fish) feed on another fish, the yellow perch. An increase in the yellow perch population causes an increase in the pike population-

The BP oil spill in the Gulf of Mexico has harmed many aquatic organisms that live in the Gulf region-

A new strain of influenza breaks out in New York City-

The population of rabbits and a population of deer are both feeding off the same plants in the same area-

Hurricane Katrina forced thousands of people to leave New Orleans-

65 million years ago, a large asteroid collided with the Earth. As a result, large amounts of ash were ejected into Earth's atmosphere.

Answer choices: Density Dependent
Density Independent

Answers

Answer:

Density Dependent

Explanation:

i think hope it helps

Texto donde se desarrolle la definicion de seleccion natural. Además, empleem los siguientes terminos: Variabilidad, mecanismo selectivo y Darwin.

Answers

Answer:

la selección natural es el mecanismo principal por el cual la evolución ocurre

Explanation:

Charles Darwin fue un naturalista inglés que propuso la teoría de la evolución o 'descendencia con modificación' mediante el mecanismo de selección natural. Acorde a esta teoría, la selección natural se define como el mecanismo selectivo de reproducción diferencial de los individuos mejor adaptados a su ambiente. La variabilidad es el la materia prima sobre la cual la selección natural actúa, seleccionado aquellos individuos que presentan combinaciones fenotípicas y genotípicas más adaptadas para sobrevivir en un ambiente en particular. Los individuos de una población que son 'superiores adaptativamente' poseen más chances de sobrevivir y reproducirse, y por lo tanto tienen también más probabilidades de transmitir sus genes a la siguiente generación.

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