This model of the cell cycle includes two arrows that each represent a process in the cycle. What do the two arrows represent?
A.Arrow 1 represents interphase, and Arrow 2 represents mitosis.
B.Arrow 1 represents meiosis, and Arrow 2 represents prophase.
C.Arrow 1 represents prophase, and Arrow 2 represents interphase.
D.Arrow 1 represents mitosis, and Arrow 2 represents meiosis.
Answers
About the question:
You will find the model of the cell cycle in the attached files
Answer:
A. Arrow 1 represents interphase, and Arrow 2 represents mitosis.
Explanation:
When we talk about the cell cycle, we refer to the interphase and the cell division (mitosis or meiosis).
Interphase: Represented by arrow 1.
The interphase is the previous step before mitosis occurs. The interphase is conformed of the G1, S, and G2 stages.
• During the G1 stage, it occurs a high intense biochemical activity. The cell duplicates its size, and the organelles and other molecules and cytoplasmatic structures also double. Some structures, such as microtubules and actin filaments, are synthesized from zero. The endoplasmic reticulum increases in size and produces a membrane for the Golgi complex and vacuoles, lysosomes, and vesicles. During this stage, the pair of centrioles separate, and each centriole duplicates. Mitochondria and chloroplasts also replicate.
• During the S stage, the DNI replication process occurs. This is the only stage in which the DNI molecule replicates. The synthesis of histones and other associated proteins also occurs.
• G2 stage is the interphase last step. DNI molecule begins to slowly condensate. The centrioles duplication process completes. The spindle fibers get assembled.
Once the whole interphase is completed, mitosis occurs.
Mitosis: Represented in the cycle by arrow 2.
Mitosis is a process by which, from a diploid somatic cell (2n), two daughter diploid cells (2n) are produced. During mitosis, the whole-cell first duplicates and then separates. Mitosis is divided into four phases (these phases are shown in the cycle with different gray color tones). During prophase, chromosomes condensate, and the nuclear membrane breaks. During the metaphase, fibers of the spindle apparatus take chromosomes toward the equatorial cell plane, where they line up. Sister chromatids are holden together until they reach the Anaphase, during which specialized enzymes break the bonds between chromatids and separate them. Each chromatid migrates to one of the poles. In telophase, the new chromosomes are already in the corresponding poles, and the nuclear membrane forms again in each pole. Finally, cytokinesis occurs.
Related Questions
All organisms must regulate by turning genes on and off in different cells at different times.
a. True
b. False
Answers
Answer:
a. True
Explanation:
The genome can be defined as the complete set of genetic information of an organism which is responsible to produce all the biological components required to carry out its metabolic functions (i.e., development, growth, reproduction, etc). These genes are transcriptionally expressed to produce mRNAs which are subsequently used to synthesize specific proteins (i.e., enzymes and structural proteins) by the process of translation. All organisms (i.e., either unicellular or multicellular organisms) exhibit specific gene expression programs by which such genes are regulated over time. Within the cell, gene regulation is essential to carry out biological processes ranging from development and differentiation to cell cycle arrest. These gene expression programs are acutely regulated via genetic (e.g., transcription factor binding) and epigenetic (e.g., DNA methylation) mechanisms, which work together in order to turn on/off genes during development.
what happens to a animal cell placed in a hypotonic solution
Answers
Answer:
If you place an animal or a plant cell in a hypertonic solution, the cell shrinks, because it loses water ( water moves from a higher concentration inside the cell to a lower concentration outside ). ... A single animal cell ( like a red blood cell) placed in a hypotonic solution will fill up with water and then burst.
Explanation:
Hypotonic solution is a solution which, contains lesser solute concentration. If animal and plant cells are kept in a hypotonic solution then endosmosis will occur. Endosmosis is a process in which the water molecules move from outside of the cell of lower solute concentration to the inside of the cell of higher solute concentration through the cell membrane or cell wall. Due to endosmosis, both animal and plant cells will swell.
A random mutation occurs and the GGA codon is changed to CGA, what effect does the substation have on amino acid
Answers
Answer:
The replacement of a base at a codon, as occurs when the GGA codon is changed to CGA, causes a change in the amino acid glycine to arginine.
Explanation:
Nitrogen base changes in a codon usually result from base changes in the DNA before transcription into mRNA,called point gene mutations.
In the case presented, the substitution of the guanine base by cytosine in the GGA codon--resulting in a CGA codon--generates a change in the coding amino acid resulting in arginine instead of glycine.
The change of an amino acid in a peptide or protein can mean an alteration in the structure or function of these molecules.
Because an amino acid can be encoded by several codons, changes of a nitrogen base at a codon sometimes do not involve changes in the amino acid sequence of a protein.
That’s the right question
Answers
Answer:
oh cool
Explanation:
What might happen to the Earth if human increase the amount of greenhouse gasses?
Explain your answer.''
Answers
Answer:
Greenhouse gas refers to any gaseous compound in the atmosphere that can absorb infrared radiation, thereby trapping heat and keeping it in the atmosphere. By increasing the heat in the atmosphere, greenhouse gases are responsible for the greenhouse effect, which ultimately leads to global warming.
Examples why greenhouse gases in the atmosphere:
farming cattle releases methane farming rice in paddy fields releases methane burning fossil fuels in vehicles and power stations releases carbon dioxide deforestation releases carbon dioxide and reduces the absorption of carbon dioxide through photosynthesisExplanation:
the ozone layer will be destroyed and the dangerous sun ray will cause alot of disaster
WILL GIVE BRAINLINESS PLEASE HELP SO I WONT FAIL
Choose one of the following scenarios and answer the questions provided. Support your answers using scientific reasoning and discussing possible impacts to individuals, society, and the environment. Be sure to also discuss any medical or ethical issues that may apply. (10 points)
Scenario 1:
Genetic engineering can be used to create more productive strains of farm animals. By adding genes to an animal's DNA, the animal can be made to produce milk or meat containing vital nutrients that would not be found naturally in those products. This provides a greater amount of nutrients per serving of milk or meat.
Do you think that this type of genetic engineering should be pursued? Explain your answer. (5 points)
What are some possible impacts (positive and negative) of this type of genetic engineering on individuals, society, and the environment? (5 points)
Scenario 2:
In the future, doctors may be able to evaluate your DNA to check for genetic markers related to specific medical conditions or harmful reactions to medications. Your personalized genetic profile could be kept on record and referred to in order to develop personal medical treatment based on your unique DNA sequencing. Scientists have found that just small variations in a specific section of your DNA can help determine how well some medications can work for you or if they would be beneficial at all.
Would you want to have your DNA profile kept in your medical record as a reference for your doctors? Explain your answer. (2 points)
What are potential pros and cons of having such tests done and referring to DNA sequences when determining a patient's medical treatment? (5 points)
Describe how the availability of this technology might affect the frequency of genetic diseases in individuals and populations. (3 points)
Answers
How does a visking tubing differ from a cell membrane?
Answers
Answer:
Visking tubing is very similar to the cell membrane. It is also a selectively permeable membrane. It has tiny holes (pores), which allow small molecules through, but stop molecules that are too large to fit through them.
Explanation:
(hope this helps)
What are the 3 main characteristics of populations?
Answers
Answer:
Population Size and Density: Total size is generally expressed as the number of individuals in a population. ...
Population dispersion or spatial distribution: ...
Age structure: ...
Natality (birth rate): ...
Mortality (death rate):
Explanation:
Answer:
Size, Spatial Distribution and age structure or, birth and death rates.
Explanation:
Demography is the study of a population, the total number of people or organisms in a given area. Understanding how population characteristics such as size, spatial distribution, age structure, or birth rates change over time can help scientists and/or governments.
PSYCH Having a family history involving anxiety disorder, experiencing or witnessing a traumatic event, or having a history of abuse are all __________ of anxiety disorders.
A. common symptoms
B. risk factors
C. causes
D. thinking styles
Answers
The answer is B. RISK FACTORS
Having a family history involving anxiety disorder, experiencing or witnessing a traumatic event, or having a record of abuse are all risk factors of anxiety disorders.
Which type of anxiety disorder could be connected to traumatic past events?Post-traumatic stress disorder is a cognitive health disorder that's begun by a scary event either sharing it or witnessing it.
Signs may include flashbacks, demons and severe anxiety, as well as unruly thoughts about the affair.
Thus, option "B" risk factors is correct.
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The reactions of glycolysis that are shared with those in gluconeogenesis (ie use the same enzymes) are those that: Are substrate level phosphorylations Are irreversible. Are regulated steps. Operate close to equilibrium. g
Answers
Answer:
The reactions of glycolysis that are shared with those in gluconeogenesis (ie use the same enzymes) are those that Are regulated steps.
Explanation:
Glycolisis and gluconeogenesis are two mechanisms related to the carbohydrates metabolism. Sometimes they are considered reverse processes. However, they are different because of the control points they have where reactions are irreversible.
Glycolisis and gluconeogenesis share 7 common reactions, that are reversible. Thses reactions are coordinated and regulated by F-2 and 6-BP as the answer to the hormonal action.
Glycolisis happens in the muscle, while Gluconeogenesis happens in the liver. Together they form the "Cori Cycle".
Farmers need to make many decisions about how they grow their crops. One of these decisions is whether to use synthetic fertilizer or organic fertilizer, such as manure.
An advantage of using synthetic fertilizer instead of organic fertilizer is that
A synthetic fertilizer can provide more targeted macronutrients to the crops
B) synthetic fertilizer remains in the soil longer than organic fertilizer does, reducing the volume needed and, therefore, the cost to the farmer
c) synthetic fertilizer adds to soil texture and increases the soil's water-holding capacity
organic fertilizer runs off more readily into waterways, leading to nutrient overload
Answers
An advantage of using synthetic fertilizer instead of organic fertilizer is that
synthetic fertilizer can provide more targeted macro nutrients to the crops.
Synthetic fertilizers are used by farmers to increase crop yield. The fertilizer
are specially formulated to ensure all the macro-nutrients are present in the
right proportions for optimal yield of the crops.
This is the advantage synthetic fertilizers have as organic fertilizer don't
contain all the targeted macro nutrients in the right amounts.
Read more on https://brainly.com/question/24342278
The exchange of gases and other materials between cells in the body and cells in the blood
occurs in...
A. stomach
B. capillaries
C. arteries
D. veins
Answers
Exchange of Gases, Nutrients, and Waste Between Blood and Tissue Occurs in the Capillaries. Capillaries are tiny vessels that branch out from arterioles to form networks around body cells. In the lungs, capillaries absorb oxygen from inhaled air into the bloodstream and release carbon dioxide for exhalation.
(Don’t know if you wanted all that)
How many objects must be present in a system to demonstrate gravity as a force of attraction?
Answers
Answer:
Explanation:
Knowing the value of G allows us to calculate the force of gravitational attraction between any two objects of known mass and known separation distance. As a first example, consider the following problem.
Which of the following is the reason in how the anterior pituitary differs from the
posterior pituitary?
O A) the hypothalamus controls the release of posterior pituitary hormones but not the anterior
pituitary
B) the anterior pituitary makes its own hormones; the posterior pituitary releases hypothalamic
hormones
C) the posterior pituitary works independently of the hypothalamus
D) the anterior stores hormones produced by the posterior pituitary
Answers
Answer:
B) the anterior pituitary makes its own hormones; the posterior pituitary releases hypothalamic hormones
Explanation:
The pituitary gland is referred to as "master gland" because it coordinates the activities of other endocrine glands. The pituitary gland is composed of two lobes namely: anterior pituitary and posterior pituitary. These two lobes are individually controlled to release several hormones by the HYPOTHALAMUS.
However, one major difference between the anterior and posterior pituitary lobe is that; the posterior pituitary DOES NOT MAKE ITS OWN hormone, hence, releases the hormones (oxytocin and ADH) it stores but produced by the HYPOTHALAMUS. On the other hand, the anterior pituitary PRODUCES ITS OWN hormones but waits for hypothalamic signal to release them.
You are tasked with characterizing responses to Epidermal Growth Factor (EGF) treatment of HeLa Cells. You grow HeLa cells then replace the culture media with media containing EGF at various concentrations, then harvest samples for Western blot analysis using an anti-phospho-MAPK antibody as a readout of receptor tyrosine kinase activity. As expected, your control (EGF treated cells) show a strong phopho-MAPK signal on your Western blot. What do you hypothesize will happen if you pre-treat HeLa cells with siRNAs (RNAi) against Ras prior to adding EGF and performing Western blot analysis with anti-phospho-MAPK
Answers
Answer:
The answer is "The EGF receptor will be activated but the signal will not be appropriate transduced"
Explanation:
It induces the replication of cell types, especially fibroblasts or epithelial cells. It enhances neuron variety's telling the difference, ripening, and survival. The proinflammatory cytokines of the EGF family are described by four disulfide bonds that confer adhesive properties. The EGF sensor is switched on and the signal is not transmitted correctly.
The moon's relative motion causes
A)
ocean tides.
B)
wind currents.
the phases of the Moon.
D)
the rotation of the Moon.
Answers
Answer: the phases of the moon
Explanation: i did it
List the types of vascular tissue you see in this stem cross-section and describe what they do:
Please dont give me a link, they don't work for me
Answers
help I will mark as brainliest
Answers
Answer:
z and y only
hope it helps ☺ ☺
Which of the following metabolic pathways does NOT directly produce lots of ATP (also called anaerobic cycle)?
A. Glycolysis
B. Krebs cycle
C. Citric acid cycle
D. Electron transport chain
Answers
Answer:
A. Glycolysis
Explanation:
Glycolysis is the first stage of cellular respiration, which occurs in the cytoplasm of the cell. Glycolysis does not require oxygen to occur, hence, it is carried out by both prokaryotic and eukaryotic organism.
Glycolysis, among the other stages of cellular respiration, produces the least ATP (2). Hence, Glycolysis is the metabolic pathway that does NOT directly produce lots of ATP.
What are some causes of CO2 levels being higher in some areas than others?
Answers
Answer:
human activities for example the burning of fossil fuels in cars or the clearing of forests for agriculture or development
In some areas, human activity is high for burning fossil fuels so these areas create more carbon dioxide.
What are the causes of CO₂ levels?Growing concentrations as a result of human activities including burning fossil fuels in vehicles and power plants, and industrial operations.
Destroying forests for development or cultivation may increase carbon dioxide levels because plants consume CO₂ in photosynthesis and during respiration CO₂ released into the atmosphere.
Plants absorb more carbon dioxide via photosynthesis than they emit through respiration throughout the day or in the spring and summer, the amount of carbon dioxide in the air decreases.
Therefore human activities produce more CO₂ by burning fossil fuels some area level is high than others.
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The amount of air pressure on your body is equivalent to the weight of:
a.
Your body
c.
4 loaves of bread
b.
Two elephants
d.
17 cats
Please select the best answer from the choices provided
A
B
C
D
Answers
Answer:
Two elephants Is the correct answer!
Hope it helps
what is urbanization
Answers
Explanation:
the process of expanding residential areas or establishing cities or towns by constructing large buildings in search of modern facilities is called urbanization.
hope it helps
What belongs there in the box
Answers
Answer:
Tissu
Explanation:
believe me my friend
Two parents have three kids. Each kid looks very different physically. What is responsible for this outcome?
Answers
Answer: This may mean that the mother has been seeing people and the kids don't have the same dad or They don't really have a lot of their parent's genes.
Explanation:
really the only options I can think of.
1. Does the insect have wings? a. Yes………………………………………………………………………… go to step 2 b. No…………………………………………………………………………. Order Hemiptera 2. Does the insect have parallel wings? (hint: Parallel wings don’t stick out to the side) a. Yes……………………………………………………………………………… go to step 3 b. No………………………………………………………………………………. go to step 4 3. Does the insect have a parallel line down the back that divides the wings? a. Yes…………………………………………………………………………… Order Coleoptera b. No …………………………………………………………………………… Order Orthoptera 4. Does the insect have 4 total wings? a. Yes………………………………………………………………………………… go to step 5 b. No………………………………………………………………………………… Order Diptera 5. Does the insect have long antennae? a. Yes………………………………………………………………………………go to step 6 b. No……………………………………………………………………………… Order Odonata 6. Does the insect have a small body with large fan –shaped wings? a. Yes…………………………………………………………………………… Order Lepidoptera b. No………………………………………………………………………………Order Hymenoptera
Answers
Complete question: You will find the image in the attached files
Based on the dichotomous key below, what order does this insect belong to?
1. Does the insect have wings?
a. Yes………………………………………………………………………… go to step 2
b. No…………………………………………………………………………. Order Hemiptera
2. Does the insect have parallel wings? (hint: Parallel wings don’t stick out to the side)
a. Yes……………………………………………………………………………… go to step 3
b. No………………………………………………………………………………. go to step 4
3. Does the insect have a parallel line down the back that divides the wings?
a. Yes…………………………………………………………………………… Order Coleoptera
b. No …………………………………………………………………………… Order Orthoptera
4. Does the insect have 4 total wings?
a. Yes………………………………………………………………………………… go to step 5
b. No………………………………………………………………………………… Order Diptera
5. Does the insect have long antennae?
a. Yes………………………………………………………………………………go to step 6
b. No……………………………………………………………………………… Order Odonata
6. Does the insect have a small body with large fan –shaped wings?
a. Yes…………………………………………………………………………… Order Lepidoptera
b. No………………………………………………………………………………Order Hymenoptera
Answer:
ORDER ODONATA
Explanation:
It is simple to read a dichotomous key. You only need to understand the technical terminology and to detailed observe your specimen. The key will lead you to the answer.
1. Does the insect have wings?
a. Yes………………………………………………………………………… go to step 2
b. No…………………………………………………………………………. Order Hemiptera
We only need to answer this question by looking at the image. In our example, yes, the insect has wings. So we need to go to question number two. Note: In the hypothetical case that the insect would not have wings, it would belong to the Hemiptera order.
2. Does the insect have parallel wings? (hint: Parallel wings don’t stick out to the side)
a. Yes……………………………………………………………………………… go to step 3
b. No………………………………………………………………………………. go to step 4
Ok, here it tells you that parallel wings do not stick out to the side. But in our example, wings do stick out, so the answer should be NO. This species does not have parallel wings. As it is a NO, we go to question number 4.
Note: In the hypothetical case that the insect would have parallel wings, we should read number 3.
4. Does the insect have 4 total wings?
a. Yes………………………………………………………………………………… go to step 5
b. No………………………………………………………………………………… Order Diptera
This one is easy. How many wings our specimen has? Four. Then it is a YES, and we go to question number 5. Note: In the hypothetical case that the insect would not have 4 wings, it would belong to the Diptera group.
5. Does the insect have long antennae?
a. Yes………………………………………………………………………………go to step 6
b. No……………………………………………………………………………… Order Odonata
Our insect has very short antennae. They are not long at all. So, the answer is NO, the insect does not have long antennae. This answer leads us directly to the order of our individual. ORDER ODONATA. Note: In the hypothetical case that the insect would have long antennae, we should read question number 6. And so on until we would reach the order.
ORDER ODONATA:
Dragonflies belong to this group. These insects characterize as having big eyes, and the separation between them depends on the species. They have an elongated abdomen, sometimes even longer than the wings. Their bodies must be robust to support the massive musculature that propels the wings during flight. The wings are long, big, and wide.
Usually, the males are much more colored than the females are.
CAN SOMEONE PLEASE HELP ME WITH THIS SCIENCE QUESTION I WILL MARK YOU BRAINLIEST THANK YOU !!!
Answers
Answer:
The answer should be can leak or spill during transport.
Explanation:
All other answers would be considered good reasons to use petroleum.
Can you answer what’s on this worksheet?
Answers
Geologists believe that the Earth's layers vary in depth, pressure and temperature. Since pressure and
temperature affect density , each layer has a different density as well. The density of Each layer determines its
position inside Earth.
From the table which layer is the least dense? What is the density of this layer?
Answers
Answer:
The least dense layer of the Earth is the crust. The crust density is 2.5 g/cm3
is the long-term average weather over a large area
Answers
Please match each description to the correct group of microorganisms.
1. Single-celled prokaryotes (Click to select)
2. Single or multi-cellular eukaryotes that photosynthesize to obtain energy (Click to select)
3. Multicellular eukaryotic organisms like parasitic worms (Click to select)
4. Minute acellular particles that parasitize cells (Click to select)
5. Molds and yeasts (Click to select)
6. Unicellular eukaryotes often described as animal-like
Answers
Answer:
BacteriaAlgaeHelminthsVirusFungiProtozoaExplanation:
1) Single-celled prokaryotes are grouped as Bacteria because they do not have the neck ear envelope
2) Single or multi-cellular eukaryotes that photosynthesize to obtain energy are grouped as Algae example : Diatoms and kelps
3) multicellular eukaryotic organisms like parasitic worms are grouped as Helminths because they both infect and depend on their host for food
4) Minute acellular particles that parasitize cells are grouped as Virus and they depend on their host for reproduction
5) Molds and yeasts can be referred to as Fungi . they breakdown organic matters found in dead particles
6) Unicellular eukaryotes often described as animal like are grouped as Protozoa and they connect animals and protists