"during which phase of mitosis does the nuclear membrane dissolve completely and the chromatid pairs arrange themselves in a single file?"

Answers

Answer 1

The answer is metaphase. It is marked by the arrangement of chromosomes at the center of the cell, half way between each of the mitoic spindle poles. Movement is intermediated by the kinetochore microtubles, which push and pull on the chromosomes to align them into what is called the metaphase plate. The chromosomes on the metaphase plate are held there firmly by pushing and pulling forces from the microtubules. Cells can stop in metaphase for days until the chromosomes are properly aligned and the cell go in anaphase.

Answer 2
Final answer:

The prophase of mitosis is the phase in which the nuclear membrane dissolves completely and the chromatid pairs arrange themselves in a single line. This prepares them for segregation during metaphase.

Explanation:

The phase of mitosis you're referring to, in which the nuclear membrane dissolves completely and the chromatid pairs arrange themselves in a single file, is the prophase. During prophase, the nuclear membrane breaks apart and the chromatids congregate at the center of the cell. They become organized in a structure known as the mitotic spindle, which will help separate the chromatids in a subsequent phase, metaphase. This is a crucial step in the cell division process which ensures the correct distribution of genetic material to the two daughter cells.

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Related Questions

Whistling is considered bad luck among mariners because it challenges the wind. Where did this idea most likely come from?

Answers

The idea most likely come from superstitious belief. Superstitious belief refers to a widely held but irrational belief in supernatural influences which lead to either good or bad outcome. Some superstitions originated from traditions, stories, folklore, myth, legends, etc. The belief that whistling on board brings bad luck is one of the sailors' superstitions. 

In severe heat, how much water can a person lose each hour

Answers

A person can lose as much as 1 quart per hour when exposed to severe heat. This is an equivalent to about 0.95 liter of water per hour or 0.26 mL of water per second. Humans with average shape and in right conditions can probably live for 3 to 5 days without any water if they're not tiring themselves. 

The neurons of area ______ are important for the analysis of color.

Answers

The neurons of area V4 are important for the analysis of color. The area characterized as the color area is Area v4. This is said to be the where the color is further processed. Because of the strength of the color receptive field in its neurons, this is the reason why v4 is an area of interest.  Initially, Zeki introduced v4 to be solely involved in processing of color but then this was proved to be incorrect. Later, it was found out that v4 is responsible for processing both color and at the same time form associated with color.  In the extended v4 occur in color modules called globs. 

"The neurons of area V4 are important for the analysis of color.

The visual cortex in the human brain is responsible for processing visual information. It is divided into several areas, each with a specific role in vision. Area V4, located in the visual cortex, is known to be involved in the processing of color information. Neurons in this region are particularly sensitive to color and are crucial for color perception and discrimination. These neurons respond selectively to specific colors and are organized in a way that allows for the complex analysis of color in the visual field. Other areas of the visual cortex, such as V1 and V2, also process visual information but are more involved in the initial stages of visual processing, including the detection of edges and orientation of visual stimuli. Area V4 builds upon this information, focusing on the color aspect of the visual input, which is essential for object recognition and the perception of a richly colored world."

The 4-cell stage occurs 2 days after fertilization. how much time passes between the 4-cell stage and implantation?

Answers

The 4-cell stage occurs 2 days after fertilization. how much time passes between the 4-cell stage and implantation?
Answer: 5 days

When doing implantation, the cells will move from fallopian tube to the uterus. The cells also need to keep dividing until it becomes a blastocyst. It will need about 5 days to do that.

Studies show that having an aed (defibrillator) available increases the survival rate of sudden cardiac arrest by a factor of:

Answers

Studies have shown that having a defribrillator available increases the survival rate of sudden cardiac arrest from 6% to 74%. AED is used on heart attack victims to terminate abnormal rhythm in the heart. If a defribrillator is used within three to five minutes of the cardiac arrest, survival rate of the victim increase from 5% to about 74%.

A mule is an example of _________. select one:
a. hybrid inviability
b. hybrid breakdown
c. none of the alternatives provided are correct
d. a postzygotic barrier

Answers

A mule is a hybrid between a horse and a donkey (a male horse and a female donkey). Mules cannot produce offspring so it is under Hybrid Sterility, which falls under Letter D: a postzygotic barrier.
A postzygotic barrier diminishes the ability to reproduce of hybrid offsprings.

The correct answer is D.

Photosynthesis is _____.
1.the process by which certain microorganisms create organic molecules from inorganic nutrients
2.the use of chemical energy to convert water and carbon dioxide into energy-rich glucose molecules
3.the use of light energy to convert water and carbon dioxide into energy-rich glucose molecules

Answers

The answer here would be number 3, photosynthesis can e explained with the equation  carbon dioxide + water —> glucose + oxygen + water, this means that plants use light to convert carbon dioxide into carbohydrates or as you put it enery rich glucose molecules, this is the way plants make there food 

Answer: The correct answer for the blank is-

3) The use of light energy to convert water and carbon dioxide into energy-rich glucose molecules.

Photosynthesis is process of formation of food ( glucose) in green plants and algae using carbon dioxide and water in the presence of sunlight.

In the first phase ( a light dependent phase), a green pigment called chlorophyll ( present in the chloroplast of plants and algae) first absorbs the energy from sunlight and converts it into chemical energy in the form of ATP, and NADPH.

This energy is then utilized in the formation of energy rich glucose molecule in the next phase, which is a light independent phase.

Thus, option 3) is the right answer.

What is the best course of action when a food handler has questions about how to properly wash their hands?

Answers

I would say the best course of action would be to actually show them ie demonstrate good hand washing activity what with soaping up a lather and washing both the inside and outside of the hands for awhile to ensure no bacteria will be introduced to the food and also ensure the food handler uses neoprene disposable gloves when handling food.

The world health organization (who) estimates that about _____ percent of all food is lost to food spoilage.

Answers

The World Health Organization estimates that about 20 percent of all food is lost to food spoilage. Some of the biological, chemical and physical changes that lead to spoilage are preventable by some preservation methods. Spoilage is characterized by a decline in eating quality, resulting in food that is less acceptable to the consumer in appearance, taste, texture or odor. The foods we eat are all derived from living matter making them subject to the natural process of decomposition. Food not only decomposes but it also lost or spoiled by being consumed by creatures other than humans which are rats, mice, flies and microorganisms. 

Ribosomes are stored as part of which of the following?

Golgi bodies

nucleus

endoplasmic reticulum

chromatin

Answers

endoplasmic reticulum 

A mother asks the nurse why her 12-month-old baby gets otitis media more frequently than her 10-year-old son. what should the nurse tell her

Answers

The baby's eustachian tubes are shorter and lie more horizontally.

Final answer:

Young children experience otitis media more frequently due to their shorter eustachian tubes, immature immune systems, and behaviors such as bottle feeding while lying down, which can contribute to infection.

Explanation:

Acute otitis media (AOM) is an infection of the middle ear that is particularly common among young children. The reason your 12-month-old baby may be experiencing AOM more frequently than your 10-year-old son can be explained by several physiological and behavioral factors unique to young children. Firstly, children have eustachian tubes that are shorter and less angled, which can lead to poor drainage and make them more susceptible to infections. Besides, young children have immature immune systems that are still developing, making it harder for them to fight off infections. Furthermore, behavioral factors such as bottle feeding while lying down can create a negative pressure within the eustachian tube, enhancing the risk of fluid and bacteria from the nasopharynx entering the middle ear, leading to infection.

Common causative agents of AOM are bacteria like Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis. These bacteria can form a biofilm, which allows them to persist in the middle ear and resist both the body's defenses and antibiotic treatment. In essence, the anatomical and functional factors in young children, combined with their behaviors, contribute to the higher incidence of otitis media compared to older children and adults.

What are three benefits of social behavior?

Answers

Social behavior refers to the interaction exhibited among two or more organisms of the same specie. Benefits of social behaviour include the following:
1. It offers protection. Many animals live together in groups in order to secure protection for themselves.
2. It heightened the success of obtain food. Previous studies have shown that many animals are successful in searching for food if they search in groups. 
3. Some animals travel in groups in order to make travel easier and also to protect themselves from predators.

Social behavior in humans and many other animals offers numerous benefits that contribute to the overall well-being and survival of individuals and their communities.

Here are three key benefits of social behavior:

1. Cooperation and Mutual Support: Social behavior facilitates cooperation and mutual support among individuals. By working together, members of a social group can achieve common goals that would be challenging or impossible to attain individually. Cooperation can lead to more efficient resource gathering, protection against predators, and improved chances of survival during challenging times. Social bonds also provide emotional support, reducing stress and promoting mental well-being.

2. Enhanced Learning and Knowledge Transfer: Social interactions enable the sharing of knowledge and information among group members. Observational learning and communication within social networks allow individuals to learn from one another's experiences, skills, and expertise. This knowledge transfer accelerates the acquisition of new skills, cultural practices, and adaptive behaviors, leading to the advancement of the entire community.

3. Increased Reproductive Success: Social behavior can positively influence an individual's reproductive success. In many species, social bonds between mating partners promote cooperation in raising offspring, ensuring their survival and increasing their chances of reaching adulthood. Additionally, social hierarchies and group dynamics can influence mating opportunities, leading to higher reproductive success for dominant or socially skilled individuals.

Furthermore, social interactions contribute to mental and emotional well-being, reduce feelings of loneliness and isolation, and provide a sense of belonging and purpose. The benefits of social behavior extend beyond individual organisms to the broader community or species, fostering cohesion and resilience within the group.

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âjess is fast asleep, and her roommate crystal is studying in the next room when their cat knocks a lamp off of the bookshelf. crystal jumps up from her desk, but jess remains asleep. what brain structure is responsible for raising or lowering the thresholds of conscious awareness, such that crystal reacts to the stimulus while jess does not?

Answers

Reticular formation

The ___________ is made up of the maxilla and zygoma, as well as the frontal bone of the cranium

Answers

The answer to this question is the orbit. Orbit is the socket in the skull where the eyes are installed and located. The orbit contains the eyes, muscles, cranial nerves, blood vessels, eyelids, cheek ligaments, and ciliary nerves. The function of the orbit is to protect the eyes and it give the eye a delicate movement. 
Final answer:

The zygomatic arch is made up of the maxilla and zygoma, as well as the frontal bone of the cranium.

Explanation:

The zygomatic arch is made up of the maxilla and zygoma, as well as the frontal bone of the cranium. The maxilla is one of the paired maxillary bones that form the upper jaw and the zygoma, also known as the cheekbone, forms the lateral wall of the skull. These bones join together to form the zygomatic arch, which is a bridge of bone on the side of the skull.

what types of immigrants benefit from the Immigration Act of 1990?

Answers

The immigrants that benefited from the 1990 Immigration Act were people that had to work, produce, and and contribute to the United States. The immigrants had to show they had particular skills needs for certain jobs, had money to contribute to the economy, or a special talent. The Immigration Act was enacted on November 29, 1990.  Visas for immigrants  were classified into 5 categories, EB-1 to EB-5 each with different requirements. 

Is the branch of biology that focuses on classifying organisms based on their evolutionary relationships?

Answers

the answer to this is true 


Which of the following gives the correct order of the biological hierarchy?

kingdom, phylum, class, order, family, genus, species

kingdom, phylum, order, family, class, genus, species

kingdom, class, family, order, phylum, genus, species

kingdom, class, order, phylum, family, genus, species

Answers

Kingdom, class, family, order, phylum, genus, species. Hope this helps!

Answer: it’s the first one kingdom, phylum, class, order, family, genus, Species

Explanation:I know this because I had the same question

What should be done to stay safe during a severe lightning storm when outside?

Answers

Stay in a car because the metal in the car acts as a shield from the lightning that could strike

In fruit flies, the allele for red eyes, R, is dominant. Which genotype represents a white-eyed male fruit fly?

A. XrXr
B. XrY
C. XRY
D. XRXr

Answers

the answer is B. XY is the male chromosome and the white allele ,r, is recessive

Answer:

The correct answer would be B. XrY.

In fruit flies, XY codes for males and XX codes for females.

Gene encoding color of eyes is present in X chromosome only and carrier two alleles R and r.

In females, R is a dominant allele that codes for red eyes in homozygous as well as heterozygous condition whereas r is a recessive allele that codes for white eyes when present in homozygous condition only.

In males, only one X chromosome is present. So, if it carries R allele then the fruit fly would exhibit red eyes whereas if it carries r then the fruit fly would exhibit white eyes.

Only two out of four options are male fruit flies: XrY and XRY.

XrY would exhibit white eyes and XRY would exhibit red eyes.

Hence, we can conclude that XrY would be the white-eyed male fruit fly.

Dr. lanzilotti wants to create a stimulus that will produce an afterimage of a red heart shape against a white background. he should make the heart _____ and the background _____.?

a. ?green; black

b. ?pink; red

c. ?red; green

d. ?blue; white

Answers

A. green ; black

The sensory cells present on our retina that are responsible for our vision are known as rod cells and cone cells. Rod cells do not allow us to see in color, only black and white, and are better in low-light conditions. Cone cells are responsible for our ability to see colors but are bad in low-light conditions. Cone cells are able to sense red, green and blue colors. When one type of the cells will be stimulated, the remaining will show an "afterimage" due to the overstimulation of the complementary cells.

plants need carbon in the form of?
carbon dioxide
fossil fuels
cellular respiration
photosynthesis

Answers

Carbon dioxide is what's plants need
Final answer:

Plants need carbon dioxide for photosynthesis.

Explanation:

Plants need carbon in the form of carbon dioxide for the process of photosynthesis. During photosynthesis, plants use carbon dioxide from the air along with sunlight and water to produce glucose (sugar) and oxygen.

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Which of Mendel's laws can be demonstrated by a dihybrid cross

Answers

The law of independent assortment and segregation can both in fact bedemonstrated by a dihybrid cross but The law of independent assortment is still better seen in a dihybrid cross.

The simplest, yet most effective method of preventing the spread of an infectious disease is to:

Answers

The simplest, yet most effective method of preventing the spread of an infectious disease is to wash your hands in between patient contacts.

Washing hands regularly in the right moment will cause the pathogen harder to spread, thus making it less likely to infect other people.

Which of the following cannot be the result of punctuated equilibrium?

1. extinction and coevolution

2. adaptation and speciation

3. stasis and expansion

Answers

The correct answer is extinction and coevolution, because Punctuated equilibrium is defined as a theory in the evolution of biology. 

Answer:

extinction and coevolution

Explanation:

Blood vessels that absorb strong pressure pulses contain more of this type of tissue.

Answers

Blood vessels that absorb strong pressure pulses contain more of elastic tissues. These tissues are bundles of protein that can be found in extracellular matrix of connective tissue. These are produced by fibroblasts and smooth muscle cells found in arteries.

Arteries closest to the heart are equipped with more elastic connective tissue and elastic fibers to absorb the high pressure of blood flow, ensuring they can maintain pressure and prevent vessel damage.

Blood vessels that absorb strong pressure pulses contain more elastic connective tissue to withstand the high pressure of blood that is pumped directly from the heart. Arteries, especially those closer to the heart known as elastic arteries, have the thickest walls due to a high percentage of elastic fibers and smooth muscle in all three layers, which include the tunica intima, tunica media, and tunica externa. These structures allow arteries to maintain blood pressure and prevent vessel damage due to the pulsatile nature of blood flow.

Do you agree with the statement Bush meat trade threatens Africa wildlife. Support your answer using evidence from research you have conducted

Answers

yes i agree with the statement that Bush meat trade threatens Africa wildlife.
Many animals are poached in Africa for their meat, from rats to monkeys etc.
I am living in Sierra Leone and i know when there is Ebola. There is many other viruses and diseases which were spread by meat of wildlife animals. Bush meat trade is very common in Africa. Bush meat trade threatens Africa wildlife.

Burmese pythons are large snakes that have been introduced into the Florida Everglades ecosystem. Burmese pythons and alligators hunt the same prey. One likely effect of the introduction of the pythons is that

Answers

the population of alligators will decrease because the lack of food
Final answer:

The introduction of Burmese pythons can lead to an increased competition between pythons and alligators, resulting in population decline for the shared prey. This potential disruption in the food chain can further affect the ecosystem negatively, possibly leading to species' extinction. The impacts in Guam and Lake Victoria ecosystems due to the introduction of non-native species show how quickly these changes can alter ecological balance.

Explanation:

The introduction of Burmese pythons into the Florida Everglades ecosystem can cause a significant shift particularly because they and alligators share the same prey. This is a similar example to the introduction of the brown tree snake in Guam which led to numerous extinctions since these non-native species rapidly become top predators in these environments. In both cases, the robust populations of these invasive species, their aggressive hunting behaviors, and the lack of natural predators can lead to a rapid decrease in the population of shared prey, possibly leading towards local extinctions.

Given their size and versatility in hunting, Burmese pythons can compete effectively with alligators for food. This could result in an increase in competition between the two species, potentially leading to a decrease in the alligator population in the long term. Considering the ecological impact of snake species introduction in Guam and Lake Victoria, which resulted in several species' extinction, similar effects might happen in the Everglades with the introduction of Burmese pythons.

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Which of the following areas in the ocean is likely to have the lowest salinity?

Answers

Around the north and South Pole the sea is less salty because of the melting ice caps
A bay at the mouth of a big river

What are the major benefits to replacing fossil fuels with solar panels and wind turbines to meet our energy needs?

We already have an infrastructure set up to utilize cheap fuels such as wind and solar.
We can harness the power of the sun and wind at all times, everywhere on Earth, so they are more reliable.
Wind and solar are currently much cheaper fuel choices than fossil fuels.
Wind and solar power are renewable resources and do not contribute to climate change.

i think it is either b or d

Answers

The major benefits to replacing fossil fuels with solar panels and wind turbines to meet our energy needs would be Wind and solar power are renewable resources and do not contribute to climate change.

Renewable resource is much better for long term result because it wouldn't damage the environment and we can utilize it indefinitely. 

Answer:

The correct answer would be option d.

Resources such as solar energy, wind energy, tidal energy, et cetera are renewable resources. Thus, they are inexhaustible in nature. In addition, they are a clean source of energy, that is, they do not cause pollution or environmental changes.

In contrast, fossil fuels such as petrol, diesel, et cetera are non-renewable resources, that is, they are present in limited amount in nature. They would exhaust in the near future if they are being used on the current pace.

In addition, they also cause pollution and global changes such as global warming, climate changes, et cetera.

Two ways in xylem is modified to carry out its function

Answers

1. The cell wall has lignin (hard substance): to prevent the xylem vessel from collapsing and withstand high pressure.
2. The absence of protoplasm (nucleus + cytoplasm) and cross wall: to allow water to move through the lumen easily.

Hope it helped!
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