which of the following statements is false? group of answer choices the nuclear envelope dissolves in metaphase and reforms in telophase. in prophase, chromosomes condense into compact structures. the spindle forms and attaches to chromosomes in prometaphase. in anaphase, each sister chromatid moves toward the spindle pole to which it is attached.
Answers
The statement that is false among the following is "the nuclear envelope dissolves in metaphase and reforms in telophase".
Mitosis is the type of cell division in which the cell divides into two identical daughter cells. Mitosis is critical in the development of a multicellular organism, repair of tissue, and cell regeneration. The process of mitosis has four phases: prophase, metaphase, anaphase, and telophase. Each of these phases plays a distinct role in the division of the cell. During this process, the nuclear envelope breaks down in the first phase, and it reforms in the last phase. Hence, the statement "the nuclear envelope dissolves in metaphase and reforms in telophase" is false.
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Related Questions
How are the results and findings of scientific study communicated?
Answers
Answer:
Typically, scientists communicate their work within the scientific community by writing and publishing research articles and presenting posters and oral communication of scientific conferences.
Answer:
Scientists often communicate their research results in three general ways. One is to publish their results in peer-reviewed journals that can be ready by other scientists. Two is to present their results at national and international conferences where other scientists can listen to presentations.
National income is the sum of compensation of employees, rents, interest, proprietors' income, taxes on production and imports, and ______. Multiple choice question.
Answers
National income is the sum of compensation of employees, rents, interest, proprietors' income, taxes on production and imports, and profits.
Profits represent the income earned by business owners or shareholders. It is a component of national income that reflects the return on investment and entrepreneurial activities within an economy.
To calculate national income, we add up the various components mentioned above, including profits, to obtain the total income generated within a country. Profits are derived from the surplus revenue left after deducting all costs and expenses from total revenue.
Including profits in the calculation of national income provides a comprehensive measure of the total income generated by both labor and capital in an economy.
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Define abiotic factor and give four examples.
Answers
Answer:
Explanation:
Abiotic factor affect the living organism vital
Water
Minerals
Light
O2 or CO2
Answer:
Nonliving things in an ecosystem.
Explanation:
TemperaturePrecipitationLandformsNutrient levelsNegative feedback: If blood delivery is low, the heart rate should
A. Increase
B. Decrease
Answers
Answer:
I believe the answer is A. increase
Explanation:
Suppose the brown allele for eye color (B) is completely dominant over the blue
allele for eye color (b). If two brown-eyed parents produce a child that is blue-
eyed, what FRACTION is the probability that the next child will have blue eyes?
Answers
Answer:
50%
Explanation:
its a chance but not likely
because its not dominant
The accidental introduction of invasive species of plants and animals often
causes severe problems in the ecosystem where they are introduced. One such
example is in Texas. The Rasberry crazy ant (Nylanderia pubens) which is thought
to have arrived in 2002 from South America. This ant species is known to attack
livestock, displace existing species, and damage electrical equipment. N pubens
consumes "honeydew," a sugary liquid substance secreted as a waste product by
aphids, which suck the sap out of plants.
Which of the following statements best explains the impact that N. pubens has
on its environment?
Answers
Answer: N. pubens has found a place within the existing food web in its new environment.
Explanation:
The statement that best explains the impact that N. pubens has on its environment is that "N. pubens has found a place within the existing food web in its new environment".
From the information given, it's stated that the Rasberry crazy ant (Nylanderia pubens) was accidentally introduced in Texas and it attacks livestock, displace existing species, and damage electrical equipment.
It's further stated that it consumes "honeydew," a sugary liquid substance secreted as a waste product by aphids, which suck the sap out of plants.
This shows that it has found a place within the existing food web in its new environment.
What is the outlook for the python problem? In other words, is this a problem that can be solved? Explain your answer.
Answers
¿ la masa de un reactivo era diferente a la de otro?
Answers
The formula CaCl, represents the compound
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Answer:
It represents the compound calcium chloride
Explanation:
Pls help me rnnnnnn!!!!!
I kinda answer the blanks that I know
Answers
Answer:
d. centromere
i. mitosis
f. metaphase plate
j. two. NOT SURE about this one
Explanation:
d: sister chromatids joined by a centromere
i: During the mitotic phase, a cell will undergo mitosis to form two new nuclei and then divide to form two new individual cells during cytokinesis.
f. Chromosomes align at the metaphase plate at right angles to the spindle poles. Chromosomes are held at the metaphase plate by the equal forces of the polar fibers pushing on the centromeres of the chromosomes. In anaphase, the paired chromosomes ( sister chromatids) separate and begin moving to opposite ends (poles) of the cell.
The cricoid cartilage A. is easier to see and palpate than the thyroid cartilage. B is the only complete circular cartilage of the trachea C. lies superior to the thyroid cartilage in the neck D. lies superior to the cricothyroid membrane in the neck
Answers
The cricoid cartilage lies superior to the cricothyroid membrane in the neck.
Cricoid cartilage is located inferior to the thyroid cartilage. It has a small, oblong, and thick structure. It is a complete ring of cartilage and is placed between the trachea and the larynx. In humans, it serves as an attachment point for the muscles, ligaments, and membranes that make up the larynx. Additionally, the thyroid gland rests on top of the cricoid cartilage, and together, they provide a protective covering for the larynx.The thyroid cartilage is a large, V-shaped structure located at the anterior midline of the neck.
The cartilage forms the anterior wall of the larynx and serves as the attachment site for several muscles that help control the position of the larynx. Although the thyroid cartilage is larger and more prominent than the cricoid cartilage, it is more difficult to see and palpate. The laryngeal prominence, or "Adam's apple," is a common feature of the thyroid cartilage that is more pronounced in males than in females.
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How can Punnett Squares help us determine genotypic and phenotypic ratios from a genetic cross?
( Please put it in a complete sentence has to be 4-5 sentence.... i will give brainly)
Answers
A Punnett square allows the prediction of the rates of phenotypes in the offspring of a cross from known genotypes.
A Punnett square can be utilized to determine a missing genotype dependent on different genotypes associated with a cross.
Which types of bacteria does the Monera Kingdom consist of ?
Answers
Answer:
Prokaryotic Bacteria
Answer:
Monera is a kingdom in biology that comprises prokaryotes, which are single-celled organism that have no true nucleus.Apr 28, 2017
Explanation:
Kingdom Monera
You have suffered from a lot of diseases that bacteria cause. But, do you think all bacteria are bad? No! The bacteria have a huge kingdom of their own that consists of a number of varieties of them. Each bacteria has a different role to play. They belong to the kingdom Monera. Here, we will know all about the kingdom Monera. We will look at both their characteristics and divisions in greater detail.
Characteristics of Monera
Monera (Monos – single) includes prokaryotes and shows the following characters:
They are typically unicellular organisms (but one group is mycelial). The genetic material in these organisms is the naked circular DNA. A nuclear envelope is absent. Both, ribosomes and simple chromatophores, are the only subcellular organelles in the cytoplasm.
Sap vacuoles do not occur. Instead, gas vacuole may be present.
The predominant mode of nutrition is absorptive but some groups are photosynthetic (holophytic) and chemosynthetic.
The organisms are non-motile or move by the beating of simple flagella or by gliding.
Bacteria Shape
Cocci: They are oval or spherical in shape.
Bacilli: They are rod-shaped. They may or may not have flagella.
Vibrios: These are small and ‘comma or kidney’ like. They have a flagellum at one end and are also motile. Vibrio bacteria has a curve in its cell.
Spirillum: They are spiral or coiled like a corkscrew. The spiral forms are usually rigid and bear two or more flagella at one or both the ends e.g., Spirillum, Spirochaetes etc.
Filament: Just like fungal mycelia, the body of the bacterium is filamentous. The filaments are very minute in size. Examples include Beggiota, Thiothrix etc.
Stalked: The body of bacterium possesses a stalk e.g., Caulobacter.
Budded: The body of the bacterium is swollen at places e.g., Rhodomicrobiu
Structure of Bacteria
Capsule: In a large number of bacteria, a slimy capsule is present outside the cell wall. It is composed of polysaccharides and the nitrogenous substances (amino acids) are also present in addition. This slime layer becomes thick, called, capsule. The bacteria, which form a capsule, are’ called capsulated or virulent bacteria. The capsule ‘is usually found in parasitic forms e.g., Bacillus, anthracite, Diplococcus pneumoniae, Mycobacterium tuberculosis.
Cell wall: All bacterial cells .are covered by a strong, rigid cell wall. Therefore, we classify them under plants. Inner to the capsule, the cell wall is present. It is made up of polysaccharides, proteins and lipids. We also find D-glutamic acid and diaminopimelic acid.
Monera
Plasma membrane: Each bacterial cell has a plasma membrane. It is situated just internal to the cell wall. It is a thin, elastic and also differentially or selectively permeable membrane.
Cytoplasm: The cytoplasm refers to a complex and aqueous fluid or semifluid ground substance (matrix). This material consists of vitamins, salts, enzymes, carbohydrates, soluble proteins, co-enzymes, lipids, mineral and nucleic acids. The organic matter is present in the colloidal state.The cytoplasm is granular due to the presence of a large number of ribosomes.
Nucleoid: It has other common names like genophore, naked nucleus or incipient nucleus. There is nuclear material in these, DNA. It is double helical as well as circular. Some kind of typical protein surrounds it. However, these are not histone proteins.
Plasmids: In addition to the normal DNA chromosomes, many bacteria (e.g., E.coli) have extrachromosomal genetic elements or DNA. These elements are plasmids. They are small circular double-stranded molecules.
Flagella: These are fine, thread-like, protoplasmic appendages. These extend through the cell wall and the slime layer of the flagellated bacterial cells. These help in bacteria to swim about in the liquid medium.
Pili or Fimbriae: Besides flagella, some tiny or small hair-like outgrowths are present on the bacterial cell surface. These are pili. They comprise of pilin protein. They consequently measure about 0.5-2 mm in length and 3-5mm in diameter.
Nutrition in Bacteria
On the basis of mode of nutrition, we can group bacteria into two broad categories. First is autotrophic whereas second is heterotrophic bacteria.
Autotrophic bacteria: These bacteria are able to synthesize their own food from inorganic substances, as green plants do. They derive their carbon from carbon dioxide. The hydrogen needed to reduce carbon to organic form comes from sources such as atmospheric H2, H2S or NH3.
Heterotrophic bacteria: Most of the bacteria cannot synthesize their own organic food. They consequently depend on external organic materials. They require at least one organic compound as a source of carbon for their growth and energy. Such bacteria are heterotrophic bacteria. Heterotrophic bacteria are of three types: Parasites, Saprotrophs and Symbionts.
you have discovered a new microorganism, but you want to know if it is a eukaryote, a bacterium or an archaeon. to investigate this question you prepare a slide with a simple stain and view it with a light microscope with a 40x objective lens and 10x ocular lens. you also prepare a control slide using spectacularis microbius (a unicellular eukaryote). you can see the cells on your control slide, and you can see tiny particles (roughly 1/10 the size of your control cells) on your experimental slide containing your unknown microorganism. what do you hypothesize based on this experiment?
Answers
Based on the experiment, I hypothesize that the unknown microorganism is a bacterium or an archaeon. This is because the tiny particles on the experimental slide are roughly 1/10 the size of the cells on the control slide, which suggests that they are much smaller than eukaryotic cells.
Eukaryotic cells are typically much larger than bacterial or archaeal cells. The average size of a eukaryotic cell is about 10 micrometers (μm), while the average size of a bacterial cell is about 1 μm and the average size of an archaeal cell is about 0.5 μm.
The fact that the tiny particles on the experimental slide are roughly 1/10 the size of the cells on the control slide suggests that they are much smaller than eukaryotic cells. This is consistent with the hypothesis that they are either bacteria or archaea.
It is important to note that this is just a hypothesis. Further experiments would be needed to confirm the identity of the unknown microorganism.
In addition to size, there are other characteristics that can be used to distinguish between eukaryotes, bacteria, and archaea. For example, eukaryotes have a nucleus, while bacteria and archaea do not. Eukaryotes also have membrane-bound organelles, while bacteria and archaea do not.
By conducting additional experiments, such as staining the cells with different dyes or using electron microscopy, it would be possible to confirm the identity of the unknown microorganism and to learn more about its structure and function.
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3. What term describes a plant's response to external stimuli like light, gravity, and touch?
A. auxins
B. tropisms
C. differential growth
D. germination
Answers
Answer:t
Explanation:
Hope this helps :)
20. As a human red blood cell matures, it loses its nucleus. As a result of this loss, a mature red blood cell lacks the ability to
(1) take in material from the blood
(2) release hormones to the blood
(3) pass through artery walls
(4) carry out cell division 20
Answers
1Answer: the answer is 1
Explanation:
When the cell lost its nucleus. The red blood cell lacks the ability to carry out cell division. The correct option is 4.
What are red blood cells?Red blood cells are the cells that are present in the blood, and they are spherical shaped and also called erythrocytes. The main work of these cells is the transfer of oxygen in the body.
The nucleus is the brain of the cell, and it operates all the work of the cell, so if a cell lacks its nucleus, it couldn't do cell division.
Thus, the correct option is (4) to carry out cell division.
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how could the presence or absence of a protein determine a phenotype
Answers
Answer:Proteins Dictate Phenotype
Genotype controls phenotype because genes direct the production of proteins . ... Some proteins serve structural functions (for example, in the maintenance of cell and/or tissue shape and rigidity) while others are involved in the transport of molecules and communication between cells.
Answer:
Each protien is essentially a code for a genotype (what the DNA is "saying"). Different genotypes (or DNA combinations) cause the person, plant, animal, etc. to look different.
Complete the following sentences. Then, place the steps of translation in order based on when they occur. Responses may be used more than once.
rRNA
elongation
amino acids
ribosomal subunits
transcription
start
IRNA
cytoplasm
initiation
synthesized
stop
termination
modified
rough ER
nucleus
Drag the text blocks below into their correct order.
During the process of ___________, polypeptide synthesis takes place.
________carries ________ to mRNA.
Once a ribosome reaches a ________ codon, _______ occurs and the ________ break away from the mRNA.
Some ribosomes attach to the ________ where polypeptides enter to be ________.
During the process of _________, anticodon-codon complementary base pairing begins as the _________ join together at a _______ codon.
In the __________, it becomes associated with ribosomes,
constructed out of __________.
After _______, mRNA leaves the ________ and enters the ________
of the cell.
Answers
During the process of translation, polypeptide synthesis takes place as amino acids are carried to mRNA by tRNA.
What are the steps of translation and their order?Translation is the process by which a polypeptide chain is synthesized from mRNA, guided by the genetic code. The steps of translation occur in a specific order:
Transcription: In the nucleus, DNA is transcribed into mRNA, which carries the genetic information to the cytoplasm.
Ribosomal subunits: Ribosomal subunits are synthesized in the nucleolus and then enter the cytoplasm. They join together at a start codon to initiate translation.
Initiation: The small ribosomal subunit binds to the mRNA, and the start codon is recognized by the anticodon of the initiator tRNA. This marks the beginning of translation.
Elongation: Amino acids are brought to the ribosome by tRNA molecules, which carry specific anticodons that are complementary to the codons on the mRNA. Amino acids are added to the growing polypeptide chain through peptide bond formation.
Termination: Once a ribosome reaches a stop codon on the mRNA, termination occurs. The completed polypeptide chain is released, and the ribosome dissociates from the mRNA.
Modified polypeptide: The polypeptide chain may undergo modifications, such as folding, cleavage, or chemical modifications, to form the functional protein.
Rough ER association: In some cases, the newly synthesized polypeptide chain becomes associated with the rough endoplasmic reticulum (ER), where further processing, folding, and transport may occur.
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Reasons for conducting peer review include all of the following except
A) identifying an illogical conclusion
B) analyzing the experimental design
C) pointing out possible bias
D) changing data to support the hypothesis
Answers
The Reasons for conducting peer review include all of the following exceptD) changing data to support the hypothesis.
What justifies the use of peer review?Peer review is intended to evaluate the reliability, excellence, and frequently the originality of papers before they are published. By eliminating publications that are inaccurate or of low quality, its principal goal is to preserve the integrity of science.
Students can provide constructive criticism and feedback on each other's work through peer evaluation, also known as peer review. It gives students the tools they need to self-evaluate, improve their own work, and develop lifelong abilities in evaluating and giving feedback to others.
Therefore, option D is correct.
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The reason why bonds form between atoms or molecules is to make a more stable become more unstable allowing for things to change.
O True
O False
Answers
During a storm, lightning strikes kill members of a population of insects in trees but not on the ground or in underbrush, changing the gene frequencies. Which of the following statement is most consistent with this change of gene frequencies being attributed to natural selection rather than genetic drift? A. The insects can change color to match the background on which they sit. B. The primary predators on the insects are birds C. The insects mate in trees and underbrush but not on the ground. D. The insects mate on the ground, but not in trees or underbrush E. The tendency to rest in trees, on the ground, or in underbrush is genetically based
Answers
The statement most consistent with the change in gene frequencies being attributed to natural selection rather than genetic drift is the tendency to rest in trees, on the ground, or in underbrush is genetically based. The correct answer is option E.
If the tendency to rest in trees, on the ground, or in underbrush is genetically based, then the insects that have a genetic predisposition to rest on the ground or in underbrush are more likely to survive the lightning strikes and pass on their genes to their offspring. Over time, this can lead to a change in the frequency of the alleles that control this behavior, resulting in a population that is better adapted to living on the ground or underbrush.
This is an example of natural selection, as the selective pressures created by the lightning strikes and the predation by birds are favoring certain traits or behaviors over others. Genetic drift could also be a factor in this scenario, but the fact that the tendency to rest in different locations is genetically based suggests that natural selection is the primary driver of the change in gene frequencies.
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Who is Ross Carr? Who is Ross Carr?
Answers
If the population of rabbits in this ecosystem decreased dramatically because of certain environmental changes, which organisms’ food supply would decrease?
A.
owl and snake
B.
jackal and wildcat
C.
green plant and mouse
D.
goat and wildcat
Answers
Answer:
A. Owl and Snake
Explanation:
A green plant cannot eat a rabbit. Neither can a goat.
B. could be the answer but I believe that A. is the answer because I'm positive that those animals eat rabbits.
Hope this helped :)
Many ancient societies had some form of science. However, modern science originated in an ancient:
.Asian civilization.
.Greek civilization.
.Egyptian civilization.
.American civilization.
HURRY PLZ!!!!!!!!
Answers
Answer:
Modern science originated in the Ancient Greek Civilization
Explanation:
Answer:
daddy
Explanation:
chill
The many volcanoes located along the edge of the Pacific Ocean make up the Ring of Fire. How does subduction play a role in the volcanic activity in the Ring of Fire?
Answers
Answer:
The Ring of Fire contains approximately 850–1,000 volcanoes that have been active during the last 11,700 years (about two-thirds of the world's total). The four largest volcanic eruptions on Earth in the last 11,700 years occurred at volcanoes in the Ring of Fire.
Explanation:
Answer:
It helps move the lava in the volcano beneath the earth's crust
Explanation:the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate
are viruses and bacteria single celled organisms?
Answers
Answer:
Viruses are not cellular organisms they are more like groups of genetic materials and proteins, this is unlike bacteria which are single-celled microbes that do not contain a nucleus.
complete the sentence using the word below
Answers
Answer:
During a process called photosynthesis, plants take in carbon dioxide, sunlight ,and water.
Plants make sugar and give off oxygen as a by-product of this process.
Please mark me brainliest if this answer could help, have a great day.
Glucose and oxygen are the ______ of photosynthesis
Answers
Explanation:
It transforms water into the oxygen and corbon dioxide in glucoseOn which geographical boundary is Sri Lanka located?
Answers
Answer:
Sri Lanka has sea borders with India to the northwest and the Maldives to the southwest. Until 1972, the international community called this country Ceylon (Indonesian: Sailan).
Explanation:
I hope this helps
1) Glven this decision tree, node 2 represents A) the optimal solution. B) a state of nature. C) an alternative. D) a non-optimal solution. 22) Given this decision tree, what can be said about this decision? A) There are three payoffs. B) There are two alternatives and three states of nature. C) There are eight decisions to be made. D) There are three alternatives and two states of nature.\
Answers
Based on the given options, option B seems to be the most plausible answer for the second question, but a definitive answer cannot be provided without more specific information about the decision tree.
Node 2: Without knowing the specific context or content of node 2, it is not possible to determine whether it represents the optimal solution, a state of nature, an alternative, or a non-optimal solution. The interpretation of node 2 depends on the specific decision tree and the labels assigned to its nodes.
Decision Tree: The structure of a decision tree typically consists of nodes representing decisions or alternatives, and nodes representing states of nature or outcomes. Based on the given options, it is likely that the decision tree has three alternatives (noted as "three payoffs" in option A) and two states of nature (noted as "two alternatives and three states of nature" in option B). However, without more specific information about the decision tree, it is impossible to confirm the exact number of alternatives or states of nature, or the total number of decisions.
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