Which events happen in meiosis that do not occur in mitosis? Check all that apply.1.The nuclear envelope is not visible in metaphase2. Cross-over occurs3.Spindle fibers form4.Homologous chromosomes line up in pairs at the equatorial plate5. Daughter cells form that are identical to each other and the original cell
Answers
The events that happen in meiosis that do not occur in mitosis are:
2. Cross-over occurs
4. Homologous chromosomes line up in pairs at the equatorial plate
5. Daughter cells form that are different from each other and the original cell, due to crossing over and independent assortment of chromosomes during meiosis I and II.
Meiosis is a type of cell division that occurs in sexually reproducing organisms, while mitosis is a type of cell division that occurs in both sexually and asexually reproducing organisms. There are several events that happen in meiosis that do not occur in mitosis, including:
Synapsis and Crossing Over: In meiosis, homologous chromosomes pair up and undergo a process called synapsis, where they physically align and exchange genetic material through a process called crossing over. This results in the formation of chiasmata, which are points of contact between non-sister chromatids that facilitate the exchange of genetic information. This process does not occur in mitosis, as there are no homologous chromosomes to pair up.
Reduction in Chromosome Number: Meiosis consists of two rounds of cell division, resulting in the production of four daughter cells, each with half the number of chromosomes as the parent cell. This reduction in chromosome number is achieved through two rounds of chromosome segregation, with the separation of homologous chromosomes occurring in the first division and the separation of sister chromatids occurring in the second division. In contrast, mitosis only involves one round of cell division, resulting in the production of two daughter cells, each with the same number of chromosomes as the parent cell.
Independent Assortment: During meiosis, the random alignment of homologous chromosomes at the metaphase plate and their subsequent separation during anaphase I leads to the independent assortment of chromosomes, resulting in the formation of genetically diverse daughter cells. This process does not occur in mitosis, as there are no homologous chromosomes to align and separate.
Overall, the events that occur during meiosis, including synapsis and crossing over, reduction in chromosome number, and independent assortment, lead to the production of genetically diverse daughter cells, which is essential for sexual reproduction and the maintenance of genetic variability within populations. These events do not occur during mitosis, which is important for the production of genetically identical daughter cells for growth, repair, and asexual reproduction.
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Related Questions
The number of protons in carbon (C)
Answers
Answer:
6
Explanation:
A plant that was grown in the dark continuously would: a. not be able to take in CO2 without sunlight b. remain healthy because plants have stored materials in their roots that can provide what the Calvin cycle needs c. continue to photosynthesize because to in carbon dioxide, the only outside input to the Calvin cycle, does not require sunlight d. not be able to produce ATP and NADPH
Answers
A plant that was grown in the dark continuously would: d. not be able to produce ATP and NADPH.
ATP and NADPH are two key molecules required for the Calvin cycle, which is the light-independent reaction of photosynthesis. ATP is generated through the process of photophosphorylation, which occurs during the light-dependent reactions of photosynthesis, and NADPH is produced through the transfer of electrons from photosystem I. Both of these processes rely on the absorption of light energy.
In the absence of light, a plant cannot perform photosynthesis and therefore cannot produce ATP and NADPH. Without ATP and NADPH, the Calvin cycle cannot proceed, as it requires these molecules as energy sources and reducing power, respectively. Therefore, a plant grown in continuous darkness would not be able to produce ATP and NADPH, leading to the inhibition of the Calvin cycle and impaired photosynthetic activity.
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A plant grown in the dark will not be able to photosynthesize effectively due to the lack of light to generate ATP and NADPH. Initially, it may be able to continue the Calvin cycle using stored materials. Once these reserves run dry, the plant stops growing.
Explanation:A plant that was grown in dark continuously would not be able to produce ATP and NADPH. This is because ATP and NADPH are produced during the light-dependent reactions of photosynthesis where sunlight is essential. When a plant is grown in the dark, there isn't enough light to promote photosynthesis. However, the plant may still survive for a while because it can utilize stored material in its roots and perform the Calvin cycle, which is a light-independent reaction of photosynthesis.
In the Calvin cycle, carbon dioxide from the atmosphere is converted into carbohydrates using the energy and reducing power of ATP and NADPH. Thus, though the lack of light may hinder ATP and NADPH formation, the plant may still be able to photosynthesize to a certain extent if it has prior stored ATP and NADPH. Once these reserves are exhausted though, the plant will cease growth as it cannot photosynthesize effectively.
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Identify the tree main parts of the model, and the four spheres that are used to organise concepts in two of these parts?
Answers
Answer:
Lithosphere, hydrosphere, atmosphere
Explanation:
The name of each of these sphere come from the Greek word that describe what they are made of ,Geo, for ground, hydro for water,bio
explain how the invaginations of the inner mitochondrial membrane are related to mitochondrial function.
Answers
The invaginations of the inner mitochondrial membrane, also known as cristae, are related to mitochondrial function in several ways.
Cristae increase the surface area of the inner mitochondrial membrane, allowing for more proteins and enzymes to be embedded and thus increasing the efficiency of oxidative phosphorylation, the process by which ATP is produced in mitochondria. Cristae also contain specialized proteins involved in electron transport, which play a critical role in generating the proton motive force needed to drive ATP synthesis.
Additionally, the unique shape and arrangement of cristae help facilitate the efficient exchange of metabolites between the matrix and intermembrane space, ensuring that the necessary substrates are available for mitochondrial metabolism. Overall, the structure of cristae is essential for mitochondrial function and efficient energy production.
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Where are electrons found in Atoms
Answers
Answer:
Explanation:
The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged). Atoms have different properties based on the arrangement and number of their basic particles.
Explanation:
Issun Shingeki... Messatsu!
In short, electrons are the negative charge in Atoms.
a pressure injury was noted in the mucous membrane outside the urethra from a urinary catheter.
Answers
When a urinary catheter is inserted into the body, it can cause irritation and injury to the surrounding tissue and membranes. In this case, a pressure injury was noted in the mucous membrane outside the urethra from a urinary catheter.
The mucous membrane is a thin layer of tissue that lines various organs and body cavities, including the urethra. When this membrane is damaged or injured, it can cause discomfort and pain for the patient.
A pressure injury occurs when there is prolonged pressure on a particular area of the body. This can happen when a catheter is left in place for an extended period of time, causing pressure on the surrounding tissue. To prevent pressure injuries, it is important to regularly reposition the patient and ensure that the catheter is properly secured and not causing excessive pressure.
If a pressure injury is noted, it is important to take appropriate steps to prevent further damage and promote healing. This may include removing the catheter, providing wound care, and monitoring the patient for signs of infection. With proper care and attention, the injury should heal over time and the patient can recover without any long-term complications.
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What is an organism answer?
Answers
Answer: An organism is basically a living thing that reacts to stimuli, grow, adapt, reproduce, and maintain homeostasis. These include eukaryotes and prokaryotes
Explanation:
3.) What cellular processes are necessary for cells to perform in order to maintain homeostasis?
Vacuole, respiration, chloroplast and photosynthesis
Photosynthesis, respiration, diffusion, osmosis
respiration, osmosis , diffusion
Chloroplast, respiration, osmosis, diffusion
Answers
Answer:
Photosynthesis, respiration, diffusion, osmosis
Explanation:
Homeostasis refers to the ability of an organism to maintain a stable internal state despite changes in external environment. In order to perform this process, some processes are required to be performed by the cell including:
- Photosynthesis, which is the process by which plants synthesize their food, helps the plant supply energy needed by the cell to perform it's function.
- Cellular respiration is the process of synthesizing energy (ATP) by the cell. Energy is needed by the cell for the numerous functions it carries out. Hence, cellular respiration is a homeostatic process.
- Diffusion is the process by which substance move from a region of high conc. to a region of low conc. until there is even distribution. Without diffusion, some materials cannot get into the cell, hence, it is a homeostatic process.
- Osmosis is the movement of water from a region with high water conc. to a region of low water conc. via a permeable membrane. The osmotic process is also a homeostatic one.
(04.02 LC)
What is a genetically modified organism? (2 points)
Answers
Answer:
organism whose genetic material has been altered so do not have pure natural genome.
why do we need to know science or the nature of science?
Answers
Answer:
A fundamental reason for teaching about the nature of science is to help our students to think for themselves and reach their own explanations and conclusions in ways that consider the scientific dimensions of socio scientific issues
What process breaks down food in order to obtain energy from it?.
Answers
Answer:
The process of getting energy from your food is called cellular respiration.
Explanation:
Cellular respiration is a set of metabolic reactions and processes that take place in the cells of organisms to convert chemical energy from oxygen molecules or nutrients into adenosine triphosphate (ATP), and then release waste products.
Answer:
cellular respiration
Explanation:
Which of the following is NOT a function of the muscular
system?
A. Produces red blood cells
B. Pumping blood
C. Produce body heat and regulate body temperature
D. Movement
E. Protecting the body's organs
F. Breathing
Answers
Answer:
a
Explanation:
A plant is provided adequate carbon dioxide and water, but no light. In this plant
a
OOOO
photosynthesis will occur more slowly than in the light.
photosynthesis will not occur.
ATP and NADPH will be stored until sunlight becomes available.
the light independent reactions will continue to produce glucose
Answers
Answer:
B. photosynthesis will not occur
Explanation:
if a plant isn't getting any sunlight, and requires it, then all production stops. You need sunlight to complete the process in photosynthesis.
As a glacier moves across the land, it pushes soil and rocks in front of it and to the sides of it. What are the hills resulting from this soil called?
Answers
Answer: They are called Moraines
Explanation: A glacier is a large body of ice originating from land that constantly moves slowly over land. It occurs in almost all parts of the world and makes up about 3/4 of fresh water all over the world.
Glaciers constantly move on land and they do this under their own weight.
As a glacier moves across land, it pushes soil and rocks in front of it and to the sides of it.
The resulting hill formed as a result of this soil movement is called a Moraine.
A moraine is sometimes referred to as a glacial till. It is an accumulation of materials (usually soil and rock) left behind by a moving glacier.
Abiotic factors of an environment are all the living components.
True or False
Answers
name three parts of a sperm cell that are also found in other animal cells.
Answers
The middle piece
The tail
In humans I’m not having dimples is dominant traits and having dimples is a recessive trait write the genotype that is
Heterozygous hybrid:
Homzygous dominant purebred:
Homzygous recessive purebred:
Answers
Answer:
is the first dominant
Explanation:
Are they genetic traits? For a long time, dimples were considered a 'dominant' genetic
Use the weather map below that shows areas of High and Low Pressure to help you answer the question.
Which location is likely experiencing the most WIND
Answers
Answer:
B because its inside the circles
4. Mutations that occur in gametes:
A. May be passed on to future generations
B. Can be important in the evolution of a species
C. Affect the functioning of the gene in which they occur
D. All of these are correct.
Answers
Answer:
Technically C is not entirely correct. But the answer is probably D
Explanation:
Mutations that occur in gametes:
A. May be passed on to future generations
-Correct mutation in gametes(sex cells) can be passed onto future generation.
B. Can be important in the evolution of a species
-Yes, it can lead to different phenotype that may be important to evolution of a species.
C. Affect the functioning of the gene in which they occur
->it can affect the functioning of the gene, but it can be silent mutation or mutation in intron
D. All of these are correct.
Also known as painful fat syndrome, ____________________ is characterized by the accumulation of fat and fluid in the tissues of the hips and legs.
Answers
Also known as painful fat syndrome, lymphedema is characterized by the accumulation of fat and fluid in the tissues of the hips and legs.
Lymphedema is a condition characterized by the accumulation of fat and fluid in the tissues, specifically in the hips and legs. It occurs due to an impaired lymphatic system, which is responsible for draining excess fluid from the body's tissues. When the lymphatic system is compromised or damaged, fluid can build up, leading to swelling and discomfort.
Lymphedema can be caused by various factors, including genetic abnormalities, surgery, radiation therapy, infection, or trauma. It is often a chronic condition that requires ongoing management and treatment to control symptoms and prevent complications.
Treatment may involve a combination of therapies, such as compression garments, manual lymphatic drainage, exercise, and skincare, to reduce swelling, improve lymphatic flow, and enhance overall quality of life for individuals with lymphedema.
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A sequence of a DNA template strand is shown. 3’ TCC AAT GGC TTA TTT GCA 5’ Which of these is the correct amino acid chain produced from the DNA template strand?
Answers
Answer:
Arginine- Leucine- proline- Asparagine- Lysine- Arginine
Explanation:
The correct amino acid sequence for 3’ TCC AAT GGC TTA TTT GCA 5’ would be - Arginine - Leucine - Proline - Asparagine - Lysine - Arginine
The genetic code is stored in a sequence of three nucleotide bases sequence of DNA called base triplets, which act as a template for which messenger RNA (mRNA) is transcribed.
A sequence of three successive nucleotide bases in the transcript mRNA is called a codon.The template strand is one of the DNA strands whose base sequence helps in building mRNA through complementary base sequencing.Template strand or runs in 3'- 5' direction, opposite to the coding strandEach codon code for the specific amino acid.The coding strand for the given template strand would be: 5' AGG UUA CCG AAU AAA GCA 3'Each amino acid code for Arginine - Leucine - Proline - Asparagine - Lysine - ArginineThus, The correct amino acid sequence for 3’ TCC AAT GGC TTA TTT GCA 5’ would be - Arginine - Leucine - Proline - Asparagine - Lysine - Arginine
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5. In your everyday life, you have probably noticed that certain instruments are ideal for certain situations. For example, you would use a spoon rather than a fork to eat soup because a spoon is shaped for scooping, while soup would slip between the tines of a fork. The use of ideal instruments also applies in science. In what situation(s) would the use of a light microscope be ideal, and why
Answers
Answer:
A light microscope, particularly when the cell has indeed been spattered to disclose information, would've been ideal when examining a small living organism.
Explanation:
A light microscope is a laboratory biology instrument or device that uses transparent sensors to illuminate and exacerbate and enlarge, very small objects. Individuals use lenses to center light on the test sample, thereby amplifying it to produce an image. The experiment is usually located near the respective.
It does this by producing a magnified image using a series of glass lenses, which first focuses a laser light on or through an object, then conveys objective lenses to expand the created image.
Explanation:
A light microscope would be ideal for viewing significantly small living organisms, such as bacteria , viruses, and other single celled organisms. A microscope is device especially made to magnify the size of object or the beings. So, it helps to the study the details of the tiniest of the things.
which of the factors could lead to a prolonged increase in heart rate, even in the absence of an external signal? select all that apply. an inability of cyclic amp to activate protein kinase a an inability to inactivate protein kinase a an inability of a g protein to hydrolyze gtp an inability of g protein coupled receptors to bind adrenaline an inability to convert atp into cyclic amp
Answers
A prolonged increase in heart rate without an external signal could result from a malfunction in the signal transduction pathway involved in regulating heart rate, which could result from a defect in factors such as cyclic AMP, PKA, G proteins, or ATP conversion. Options A and B both are correct.
A prolonged increase in heart rate without an external signal could result from a malfunction in the signal transduction pathway involved in regulating heart rate. The regulation of heart rate is mediated by the sympathetic and parasympathetic nervous systems, which use signaling molecules like adrenaline and acetylcholine to modulate the activity of the heart. These signals bind to specific receptors on the surface of heart cells, which then activate intracellular signaling pathways to modulate heart rate.
Factors that could lead to a prolonged increase in heart rate include the inability of cyclic AMP to activate protein kinase A (PKA) or the inability to inactivate PKA. Cyclic AMP is a second messenger that is involved in the regulation of heart rate by activating PKA, which then modulates the activity of ion channels that control heart rate.
The inability to hydrolyze GTP by a G protein or the inability of G protein-coupled receptors to bind adrenaline could also lead to a prolonged increase in heart rate. G proteins are signaling molecules that are involved in the activation of intracellular signaling pathways in response to external signals, including adrenaline. If these proteins malfunction, it could result in a prolonged increase in heart rate.
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Complete question:
Which of the following factors could lead to a prolonged increase in heart rate, even in the absence of an external signal? Select all that apply.
A. Inability of cyclic AMP to activate protein kinase A
B. Inability to inactivate protein kinase A
C. Inability of a G protein to hydrolyze GTP
D. Inability of G protein-coupled receptors to bind adrenaline
E. Inability to convert ATP into cyclic AMP
a bomb calorimeter can provide a close approximation for the amount of energy that will be produced by the body through the process of metabolism. State True or False your answer:
a. True
b. False
Answers
The quantity of energy that the body will create during the course of metabolism may be roughly estimated using a bomb calorimeter. It is accurate to say this.
Is a fast metabolism healthy?A high metabolism provides advantages since it causes a person to burn calories more quickly than someone with a thyroid imbalance. However, a quick metabolism might make it difficult to put on weight or keep up a balanced diet.
Why does the metabolism move slowly?A slow metabolism is caused by a variety of factors, including decreased activity, muscle loss, and internal organ aging. Fortunately, there are several strategies available to prevent aging from affecting your metabolism.
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when making a circle graph what angle represents 20%
Answers
Answer:
The central angle is 20% of 360°, that is
central angle = \frac{20}{100}
100
20
× 360° = 0.2 × 360° = 72° → C
The word “soma” means body how does this relate to the meanings of autosome and somatic cell
Answers
If soma means body then somatic cells and autosomes are present in the body
What are autosomes?
One of the 22 numbered pairs of chromosomes that the majority of us have in practically all of the body's cells is called an autosome. We r,eally have 46 chromosomes in these cells, divided into 23 pairs but two of these, the X and Y chromosomes, are referred to by letters rather than numbers and are called sex chromosomes rather than autosomes because they play a role in determining our sex or gender. The 22 pairs of autosomes are identified primarily by their numbers, which are inversely related to their sizes. The smallest chromosome, Chromosome 1, is actually the largest chromosome. It contains about 3,000 genes. Finally, we reach the tiniest chromosomes those who have the highest numbers. You might assume Chromosome 22 since there are only roughly 750 genes on each of the 22 chromosomes, but in reality, Chromosome 22 is not the smallest of the autosomes. When it was first described, we believed it to be, which is how it got its name, 22. Chromosome 21 is actually a little bit smaller than Chromosome 22 as it turns out.What are somatic cells?
The body's somatic cells are those that are neither sperm or egg cells (which are called germ cells). Somatic cells in humans are diploid, which means they have two sets of chromosomes, one from each parent. Somatic cell DNA mutations can have an impact on an individual, but they cannot be passed on to the individual's progeny.All living things are composed of somatic cells, which are the basic building blocks of all organisms. Somatic cells in humans are diploid, which means they have two sets of chromosomes, one set from each parent. Somatic mutations can affect the person who has them but cannot be passed on to their offspring and have no impact on them.Therefore autosomes and somatic cells are related to body as they are present in body
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What type of mutation has occurred?
Below are two sequences of a segment of DNA.
Normal sequence TGA CAC TAG
Mutated sequence TGA CCT AG
Deletion mutation
Nonsense mutation
Insertion mutation
Substitution mutation
Answers
Answer:
substitution mutation
Answer:
substitution
Explanation:
FAST IM GETTING TIMED BRAINLIEST
The following is an example of convection, conduction or radiation;The attic is really warm in the summer and the basement is cold
Conduction
Convection
Radiation
Answers
Answer:
The answer is Covection.
Explanation:
Convection current occurs where hot / warm air rises and cold air drops and replace it.
Answer:
I Would say Radiation.
Explanation:
The Attic is reciving radiation from the sun while the basement is not
(it could also be conduction, but im positive on radiation)
Who developed his theory of evolution by natural selection based largely on
observations he made on the Galapagos Islands?
A. Thomas Malthus
B. Gregor Mendel
C. Wilhelm Weinberg
D. Charles Darwin
Answers
D. Charles Darwin
Explanation:The theory of evolution explains the changes that organisms go through in order to survive. This theory was developed by Charles Darwin.
Galapagos Islands
The Galapagos are known for their biodiversity. Additionally, the islands are isolated from each other. This means that the organisms on different islands were able to develop independently from each other.
Two important species on the Galapagos include the Galapagos tortoise and the Finch.
The Galapagos tortoise was studied by Charles Darwin. He noted that despite the fact the tortoises were the same species, the tortoises on different islands had different shell shapes.Darwin also studied Finches across the islands. Similar to the tortoises he saw that the beak sizes of the same species differed depending on the island.Evolution
Based on the differences between the organisms, Darwin concluded that over time the organism must have changed their physical traits to survive better. For example, on islands with a lot of hard seeds, the finches would have stronger beaks so that they could access more food.
Evolution occurs through natural selection. Natural selection is when organisms that have traits better suited to their environment reproduce more. Thus, spreading these traits into the gene pool.
So, the differences in the organisms on different islands show how animals can change their traits to adapt to their environments.
Which organism was used to re-evaluate its position in
the tree of life using the recent technology?
Answers
Answer:
Fungi
Explanation:
Fungi is a eukaryotic organism that is re-evaluating its position in the tree of life.
Fungi are closely related to the animal kingdom in comparison to the plant kingdom. Because of the presence of the chitin in their cell walls, fungi is different from plant, bacteria, and protists. But fungi have cell wall while animal cells do not contain cell wall, so not classified as animals.
So, fungi is re-evaluating its position in the tree of life and in present there is a individual kingdom for fungi.