which phase is where the chromosomes condense and the nucleus disappears?
Answers
The phase where the chromosomes condense and the nucleus disappears is called prophase. Prophase is the first phase of mitosis.
During this phase, chromosomes begin to condense and become visible. The nuclear envelope dissolves, and the spindle fibers begin to form at opposite poles of the cell. Chromosomes are aligned at the metaphase plate in the next stage, metaphase. Prophase is a crucial stage in the cell cycle since it is when the chromatin fibers in the nucleus condense and become visible as chromosomes.
Chromosomes contain genetic information that is transmitted to the new cells as they divide. Prophase is an essential step in cell division since it prepares the chromosomes for mitosis. The breakdown of the nuclear envelope allows spindle fibers to interact with the chromosomes directly, causing them to line up along the cell's midplane.
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Related Questions
Determine which word matches each definition.
A statement about how something behaves or functions in the natural world:
A possible explanation of or answer to a scientific question that is based on prior knowledge or research and is testable:
A well tested, widely accepted explanation that combines several hypotheses and observations:
Answers
A statement about how something behaves or functions in natural world: Theory; A possible explanation of or answer to scientific question that is based on prior knowledge and is testable: Hypothesis ; well tested, widely accepted explanation that combines several hypotheses and observations: Scientific Law
What is meant by theory and hypothesis?In the context of science, hypothesis is a possible explanation for an observation or phenomenon that can be tested through further investigation. It is a tentative explanation that is based on prior knowledge or research, and it can be supported or refuted by collecting and analyzing data.
On the other hand, theory is a well-established explanation for a phenomenon that is based on large body of evidence from many different sources.
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PLEASE HELP!!!! This is a situation so major! My life depends on it!!!
Answers
Answer:
The lighter moths would be more suitable and the darker moths would eventually die out since they have no camouflage, thus an influx of lighter moths will emerge.
Explanation:
DNA Sequencing The following DNA fragment was sequenced by the Sanger method. The red asterisk indicates a fluorescent label.
(EQUATION CANNOT COPY)
A sample of the DNA was reacted with DNA polymerase and each of the nucleotide mixtures (in an appropriate buffer) listed below. Dideoxynucleotides (ddNTPs) were added in relatively small amounts.
1. dATP, dTTP, dCTP, dGTP, ddTTP
2. dATP, dTTP, dCTP, dGTP, ddGTP
3. dATP, dCTP, dGTP, ddTTP
4. dATP, dTTP, dCTP, dGTP
The resulting DNA was separated by electrophoresis on an agarose gel, and the fluorescent bands on the gel were located. The band pattern resulting from nucleotide mixture 1 is shown below. Assuming that all mixtures were run on the same gel, what did the remaining lanes of the gel look like?
(FIGURE CANNOT COPY)
Answers
In order to determine the remaining lanes of the gel from the Sanger method of DNA sequencing, we need to understand how the method works. The Sanger method uses dideoxynucleotides (ddNTPs) to terminate DNA synthesis at specific nucleotides. The resulting DNA fragments are then separated by electrophoresis, and the fluorescent labels allow us to determine the sequence.
The banding pattern from nucleotide mixture 1 (dATP, dTTP, dCTP, dGTP, ddTTP) will show the positions of all thymine (T) nucleotides in the sequence. To determine the remaining lanes, we will consider the ddNTPs present in each mixture:
2. dATP, dTTP, dCTP, dGTP, ddGTP: This mixture will show the positions of all guanine (G) nucleotides.
3. dATP, dCTP, dGTP, ddTTP: This mixture lacks dTTP and has ddTTP, so it will also show the positions of all thymine (T) nucleotides.
4. dATP, dTTP, dCTP, dGTP: This mixture has no ddNTPs, so it will show the full-length DNA fragments.
To summarize, the remaining lanes of the gel would show:
- Lane 2: Positions of all guanine (G) nucleotides
- Lane 3: Positions of all thymine (T) nucleotides (similar to Lane 1)
- Lane 4: Full-length DNA fragments
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How does cholesterol help stabilize the plasma membrane in hot and cold temperatures.
Answers
Cholesterol is bidirectional regulator of membrane fluidity so at high temperatures it stabilizes the membrane and raises its melting point, in low temperatures it intercalates between the phospholipids and prevents them from clustering together .
Cholesterol has tetracyclic ring structure and also is trans conformation, that renders the molecule with rigid characteristics that increases membrane packing and contributes to the integrity and rigidity of cell membranes.
Hence, at low temperatures, cholesterol increases membrane fluidity by preventing membrane lipids from interacting close together. At high temperatures, cholesterol decreases membrane fluidity.
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Alice was participating in a photosynthesis lab for science class. The lab procedures instructed Alice to prepare a test tube containing water, a sprig of elodea (a common aquarium plant), and 10 g of sodium bicarbonate (NaHCO3). She was then instructed to place the test tube in front of a strong light source for one minute. Alice noticed tiny bubbles forming on the leaves of the elodea. What is the most logical explanation for why Alice saw bubbles forming on the leaves of the elodea?Group of answer choicesThe bubbles formed as a result of the hydrogen from the sodium bicarbonate mixture dissolving the elodea leaves.The bubbles formed from the release of water molecules from the elodea leaves.The bubbles formed as the elodea plant released oxygen from the elodea leaves.The bubbles formed as the elodea plant released carbon dioxide from the elodea leaves.
Answers
Step 1.
Write down the experiment data.
- tube containing water;
- alodea (photosynthetic organism);
- 10 g of sodium bicarbonate;
- light source.
Step 2.
Why bubbles are formed on the leaves of the alodea?
The experiment have all the condictions for photosynthesis, since it provides: water (that is in the tube), CO2 (because of the dissolved sodium bicarbonate), light (because of the string light source). Therefore the most ogical explanation for Alice experiment results is: the bubbles formed as the elodea plant releases oxygen from the elodea leaves, that because with all the elements in the experiment the plant can do a normal photosynthetic process that way realing oxygen in the tube and forming bubbles of "air".
How does the maturing oocyte move within the ovary?.
Answers
The maturing oocyte move within the ovary through the uterine tubes to the uterus
During oogenesis, the ovary houses immature oocytes, which gradually mature. The maturation of the oocyte occurs within a follicle, which is a specialized structure of the ovary. It is not until the maturation process is complete that the mature oocyte is ovulated and moves through the uterine tubes to the uterus. Maturation of the oocyte involves a series of developmental steps, including meiosis and cytoplasmic growth, that prepare it for fertilization by a sperm cell.
As a result of this process, the oocyte increases in size and undergoes a series of structural changes that enable it to be fertilized. Once ovulated, the mature oocyte moves within the uterine tube towards the uterus, this movement is facilitated by the beating cilia within the tube and the contractions of the smooth muscle within the uterine tube. The journey of the mature oocyte from the ovary to the uterus takes several days and requires successful transport through the uterine tube. So therefore the maturing oocyte move within the ovary through the uterine tubes to the uterus.
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According to CDC, between 1998 and 2011, about 79% of the dairy-related illness outbreaks were caused by
cheese or raw milk (unpasteurized) products. 148 outbreaks and 2,384 illnesses were reported during that time.
284 required hospitalizations and 2 deaths were caused by cheese or raw milk products. Although these numbers
seem small, there are risks. At a federal level, although the FDA forbids the sale or distribution of raw
(unpasteurized) milk, 13 states allow the sale of raw milk in their retail stores, and another 17 states allow the
sale of raw milk on the actual farm that the milk was produced.
Explain the thinking that caused the FDA to forbid the sale and distribution of raw milk.
A)
Unpasteurized milk has the shortest shelf-life.
B)
Parasitic organisms that live in cows can be passed on to humans.
Unpasteurized milk has a short shelf-life and costs more money to produce.
D)
Microorganisms found in unpasteurized milk can cause illness and even
death.
Answers
Answer: D
Explanation:
D relates to the answer, it is saying that a lot of bacteria and viruses can be on unpasteurized milk, this can really make the milk bad and you can get seriously ill or even die from this.
Which of the following is not an example for abiotic factor: a)rain b)salinity c)biodiversity d)humidity
Answers
Answer:
C
Explanation:
Biodiversity involves living organisms while the rest of the options do not
you put water in a small bowl and set it outside for your dog, when you return, there is less water in the dish. what happened?
Answers
Answer:
The dog probably drank the water. If you want to get scientific, then the water evaporated over time (if it was a hot day)
Which RNA base bonds with guanine?
Answers
Answer:
Cytosine
Explanation:
DNA:
Adenine - Thymine
Cytosine - Guanine
RNA:
Adenine - Uracil
Cytosine - Guanine
2. How do you think your body uses each of these nutrients? Explain your reasoning.
carbohydrates, proteins, and lipids
Answers
Proteins, carbs, and lipids are all used differently by the body. When all three nutrients are abundant in the diet, carbohydrates and fats are primarily used for energy, while proteins aid in the production of hormones, muscle, and other proteins. Proteins in diet are broken down into amino acid fragments.
How does your body utilise these nutrients?Nutrients perform one or more of three essential activities in the body: they give energy, contribute to bodily structure, and/or control chemical processes. These fundamental functions let us to perceive and respond to our surroundings, move, expel waste, breathe, develop, and reproduce.
Carbohydrates are the primary source of fuel or energy in your body. Protein aids in the formation of tissue and the restoration of your body following injury or stress.
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Answer:
Proteins, carbs, and lipids are all used differently by the body. When all three nutrients are abundant in the diet, carbohydrates, and fats are primarily used for energy, while proteins aid in the production of hormones, muscle, and other proteins. Proteins in diet are broken down into amino acid fragments.
Explanation:
How does your body utilize these nutrients?
Nutrients perform one or more of three essential activities in the body: they give energy, contribute to the bodily structure, and/or control chemical processes. These fundamental functions let us perceive and respond to our surroundings, move, expel waste, breathe, develop, and reproduce.
Carbohydrates are the primary source of fuel or energy in your body. Protein aids in the formation of tissue and the restoration of your body following injury or stress.
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PLEASE HELP!!!!
Photoperiodism is one example of how a plant responds to changing seasonal conditions. Why is it important for plants to be able to respond to seasonal changes?
Answers
Answer:
It is important because plants respond to light depend, logically enough, on the plant's ability to sense light. Phototropism is a directional response that allows plants to grow towards, or in some cases away from, a source of light. Photoperiodism is the regulation of physiology or development in response to day length.
Which item would be most appropriate to measure on the triple beam balance in the Gizmo? Select one: 7 Oa. A car b. A baby C. A 55 inch flat screen TV O d. A pen
Answers
Answer:
The correct answer is - option D. a pen.
Explanation:
A triple beam balance is an instrument which is a type of lever used to measure the mass of an unknown mass object very precisely. This instrument shows a very small error of ±0.05 grams.
It has a measurement tray on one side of the instrument and a fulcrum on the other side. On the measurement tray, an object with an unknown mass is placed and a set of sliding weights on the fulcrum. The sliding weights called riders that slide on beams to balance the object. The maximum weight a triple beam balance can measure is 610 grams ( 10+500+100).
Thus, the correct answer among these options is - option D.a pen.
In which reproductive cycle of the virus does the viral DNA integrates with the host DNA?
Life Cycle
Apoptosis Cycle
Lytic Cycle
Lysogenic cycle
Answers
Answer: Lysogenic cycle
Explanation: just took the quiz
Your explanation must include:
• an explanation of each of the groups that make up the Indian caste system
• an explanation of the ways the groups within the Indian caste system interact or relate to one
another
Reflection:
Identify a school, church, or business in your community and describe the social structure you see within
that organization in at least four sentences.
Answers
The four varnas of the Hindu classification system are Brahmins, Kshatriyas, Vaishyas, and Shudras. According to traditional beliefs, these groups play various functions and hold different social statuses.
What did each of the four caste groups do in prehistoric Indian society?Brahmins (priests), Kshatriyas (warriors), Vaishyas (skilled traders, merchants), and Shudras were the four classes that made up the Vedic society's caste system, or Varna (unskilled workers). past lives; karma.
What is caste in a nutshell?Differences in income, inherited status or privilege, profession, occupation, or race can cause society to be divided. prestige: of the position granted by caste rank.
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_____ and glycogen
are both examples of polysaccharides.
A. Starches
B. Polymers
C. Monosaccharides
Answers
how does the extinction of species affect humans
Answers
Answer:
it decreases water and air quality
Explanation:
According to appearances, which light produces the healthiest plant?
Green
Blue
Yellow
Red
Answers
Answer:
Blue light
Adding 10-20% blue light allowed plants to grow much healthier, with a compact appearance. There is also far-red light which is has wavelengths that are lower than normal red light–similar to near-infrared wavelengths. Far-red light helps the plants produce greater yields.
What is you were an astronaut and interplanetary explorer and you discovered “something” on another planet,like Mars that reproduced by itself, grew in size, took in food, responded to you or other stimuli, but did not seem to be made of cells or possess DNA or RNA. would you consider it to be living or nonliving?
Answers
Answer:
I would consider it to be nonliving
Explanation:
The characteristics of life demarcates a living thing from a nonliving thing. These characteristics include the ability to move, ability to respire, ability to reproduce, ability to undergo nutrition (take in food), ability to respond to external stimuli, ability to grow by increasing in size and more importantly must be made up of at least a single cell. Cell is the fundamental and basic unit of all living things.
This object found in Mars may be able to perform every other characteristics of a living thing e.g reproduction, irritability, growth, nutrition etc but to be considered as a living thing, it must consist of at least one CELL, which in turn must contain either a DNA or RNA molecule that carries information about its genetic content.
Hence, according to the universal CELL THEORY that states that "All living things contains one or more cells", this something found on Mars is not considered living.
Are humans made of prokaryotic or eukaryotic cells?explain.
Answers
Hope this helps (:
humans are still categorically eukaryotic organisms. This means that all human cells—including those found in the brain, the heart, the muscles, and so on—are also eukaryotic.
The __________ system is made up of the nose, pharynx, trachea, lungs, bronchi, and alveoli. (5 points)
a
circulatory
b
endocrine
c
immune
d
respiratory
Answers
Answer:
respiratory system. it is the system that helps you breathe/lets oxygen in body
Answer:
D. RespiratoryExplanation:
Respiratory is a pertaining to respiration; respiratory assistance. The respiratory system is made up of the nose, pharynx, trachea, lungs, bronchi, and alveoli.
Circulatory is relating to circulatory system or to circulation of the blood.
Therefore, the correct answer is d. respiratory.
Which of the following are not marsupials? a. kangaroos. b. koalas. Opossums. d echidnas. Please select the best answer from the choices provided?
Answers
Answer:
echidnas
Explanation:
echidnas is not marsupials because it is a spiny insectivorous egg- laying mammal with a long snout and claws , native to Australia and New Guinea.Comparing the remains of modern species to fossils in search of common ancestry.
Answers
Add the corresponding RNA base pairs to make a mRNA strand given the following DNA segment. (1)
G C T A T C G T C C A T A G C C T A T G A G C
Plsss help
Answers
Which statement accurately describes Gymnosperms select all that apply
Answers
Answer:
Some require heat for seed dispersal.
Fertilized ovules grow into seeds.
Male and female cones may grow on the same plant.
Explanation:
I did this quiz. Have a good day :)
Explain the term"blockage of the respiratory tract is always dangerous ".
Answers
Answer:
The respiratory tract is the subdivision of the respiratory system involved with the process of respiration in mammals. The respiratory tract is lined with respiratory mucosa or respiratory epithelium.
Describe two reasons why
a species might not be able
to expand its range.
Answers
The simulation shows a game of tug-of-war. Place a blue team and a red team with same-sized people on each side of the rope. What can you say about the sizes of the left and right arrows?
Answers
The sizes of the left and right arrows should be the same.
In the game of tug-of-war, the sizes of the left and right arrows represent the relative strengths of the blue team and the red team. If the blue team is stronger and pulling harder, the size of the left arrow would be larger than the size of the right arrow.
Conversely, if the red team is stronger, the size of the right arrow would be larger than the size of the left arrow. The sizes of the arrows indicate the force exerted by each team and provide a visual representation of the balance of power in the game.
In tug-of-war, the objective is for one team to overpower the other and pull the rope towards their side. The larger the arrow representing a team's strength, the greater their force and ability to move the rope in their direction.
The size of the arrows serves as a visual cue for spectators to understand which team has the advantage at any given moment. It helps to create a sense of competition and excitement as the teams struggle to gain control of the rope.
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What is the function of mitochondria in the cell?
Your answer:
O Provide energy for the cell
O Regulate materials coming in out of the cell
O Shape, support, and protect the cell
Clear answer
Answers
The more closely related two organisms are, the longer they will look alike during stages of early development prior to birth. This describes which piece of evidence for evolution?
a)Analogous structures
b)Vestigial structures
c)Embryology
d)Homologous structures
Which concept is a part of Lamarck's Theory of Evolution?
Organisms must struggle for existence
Organisms have more offspring than can survive
Traits can be modified, become stronger, and be passed on, while traits that are not used will disappear
Traits that are best suited to an environment will help organisms survive (survival of the fittest)
While making careful observations at the Galapagos Islands, Darwin noticed that each island had its own species of finch with different beaks. He later concluded that the species evolved by natural selection based on what they eat. What does the selecting of beaks in natural selection?
The individuals
The environment
The reproduction
The variations
Answers
Answer:
C,
Traits that are best suited to an environment will help organisms survive (survival of the fittest),
The variations
Explanation:
Embryology is the branch of biology and medicine concerned with the study of embryos and their development.
He states "Survival of the fittest "many times in his theory of evolution
Beaks are the best adapted (fittest) to the available food have the best chance of surviving (not starving to death) and of having descendants
Therefor having variation!
Hope this helps!
Answer:
Which concept is a part of Lamarck's Theory of Evolution?
IS C.Traits can be modified, become stronger, and be passed on, while traits that are not used will disappear
NOT D.Traits that are best suited to an environment will help organisms survive (survival of the fittest)
While making careful observations at the Galapagos Islands, Darwin noticed that each island had its own species of finch with different beaks. He later concluded that the species evolved by natural selection based on what they eat. What does the selecting of beaks in natural selection?
IS B.The environment NOT D.The variationsExplanation:
