How are meiosis and mitosis different?
O A. Mitosis has anaphases I and II, but meiosis has only anaphase I.
O B. Meiosis produces four cells, but mitosis produces two cells.
O C. Chromatids are formed only during the process of meiosis.
O D. Mitosis produces haploid cells and meiosis produces diploid cells.
Answers
Answer:
B
Explanation:
Meiosis and mitosis are different, as meiosis produces four cells, but mitosis produces two cells that are present in Option B, as mitosis produces two genetically identical daughter cells, while meiosis produces four genetically diverse daughter cells.
What are meiosis and mitosis?Mitosis is a process of cell division that occurs in somatic (non-reproductive) cells, where a single cell divides into two identical daughter cells. The purpose of mitosis is for the growth, repair, and replacement of cells in the body, whereas meiosis is a type of cell division that occurs in reproductive cells (germ cells) and is involved in the production of gametes (sperm and egg cells) in animals. Meiosis involves two rounds of cell division, known as meiosis I and meiosis II, and makes the gametes.
Hence, meiosis and mitosis are different, as meiosis produces four cells, but mitosis produces two cells that are present in option B.
Learn more about meiosis and mitosis here.
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Related Questions
what is the purpose of the proper handeling of experimental subjects
Answers
Answer:
so you won't get hurt and you'll be more cautious??
Answer:
to ensure that good and reliable data are collected. The proper handling of the experimental subject is to ensure the hypothesis is shown correct
which band is defined by length of thick filament?
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Answer:
sarcomeres which are made of bipolar from the lab experiment
What is the scientific process?
Answers
Explanation:
The scientific process is supposed to be something like ...
make observationsformulate a theory that explains the observationsuse the theory to formulate experiments and predict expected additional observationsseek to determine if the predictions are correct, especially seeking out data that might show otherwisemodify the theory as needed to explain all observations and dataAt any point, the observations and theories can be published for critique by other observers, experimenters, and scientists.
The theory should be sufficiently defined so that it is possible to differentiate a relevant experiment or observation from one that is irrelevant. Similarly, every effort should be made to separate causality from correlation, and to identify or rule out alternate causes or additional causes from the one(s) theorized. Experiments should be sufficiently well-defined so that they can be reproduced.
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Additional comment
These days, a common error is to ignore or discount observations that don't agree with accepted theory, including observations by "lay persons." Such "scientists" fail to remember that science is only advanced by attempting to explain the unexplained.
Answer:
A formal method used to answer scientific questions
Explanation:
A P E X
Drag the labels onto the diagram to identify the tissues and structures.
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central cand
matrix
Group 2
lacuna
Group 2
Group 2
osteocyte in
lacuna
Group 2
C
chondrocyto
Group 2
bono
(osseous
tissue)
Group 1
Group 1
hyaline
cartilago
Answers
Answer: See image
Explanation:
Cartilage is composed of chondrocytes and chondroblasts, immersed into the extracellular matrix. When the tissue is fixated, lacunae are also visible.
Bone formation involves osteoprogenitor cells, osteoclasts, osteocytes in lacunae, osteoblasts, extracellular matrix, and central ducts.
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Cartilage and bone are two specialized types of connective tissues.
Cartilage cells are
Chondrocytes → placed in small places of extracellular matrix with collagen fibers.Chondroblasts → are in charge of the extracellular matrix formation.When fixating a piece of tissue, the cells shrink by cytoplasm retraction, leaving a space between the cell and the extracellular matrix. This space is known as lacune or condroplast.
Once the chondroblast secreted the extracellular matrix, they turn less active, becoming Chondrocytes. These cells are bigger-sized and ovoid-shaped. Central chondrocytes arrange in small groups.
Cartilage does not have vessels, so cells nourish through nutrients that diffuse through the matrix.
Cartilage extracellular matrix is composed of fibrous proteins that provide stability -Type II collagen- and deformation resistance -GAGs-. This tissue is rigid but provides flexible support to specific regions. It places in areas where there is constant and direct compression. It is also involved in the endochondral ossification process.
Bone tissue differentiates from other tissues because of the mineralized extracellular matrix. This tissue provides support and protection due to the rigidity and hardness of the matrix. The bone cells are:
OsteocytesOsteoprogenitores → in charge of osteoblasts productionOsteoblasts → Synthesize and secrete osteoid matrix that will later calcifyOsteoclasts → Phagocytic cells in charge of osseous resorption and bone modulation.Among the matrix, there are spaces called lacunae. Each lacuna contains an osteocyte.
Osteoprogenitor cells produce osteoblast cells. When the extracellular matrix mineralizes, some of the osteoblasts get trapped in lacunae and turn into osteocytes. Nexus union canaliculus joint trapped osteoblasts and osteocytes.
In compact tissue, the bony matrix is arranged into concentric superposed laminae, with lacunae and osteocytes can be found in between. These laminae are arranged around a central longitudinal canal. The whole unit -matrix, lacunae, and canal- compose the osteone.
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Describe the animals and vegetation that you see in the different climate zones.
Answers
Answer:
Explaining Below V
Explanation:
There are 5 different kinds of climates globally.
Tropical
Dry
Temperate
Continental
Polar
Tropical climates are very hot and humid. There's lots of rain (estimated around 59-60 inches per year). The average temperature tends to be over 60°F or 18°C. Plants you can find are incredibly diverse in both plants and animals. You can find animals such as monkeys, parrots, anacondas, jaguars, tigers, and many more. The tropics have the greatest plant diversity on the planet. The climate generally is centered around the equator.
Dry climates are generally very warm and dry. Humidity is very unlikely as everything is mostly dry heat. There's very little precipitation. Dry climates usually consist of deserts (Fe: Sahara desert). Plants such as cacti, succulents, wildflowers, and small trees, shrubs, and grasses. Animals can vary from things such as tarantulas, rattlesnakes, foxes (only some), camels, and rabbits. Depending on the desert, the heat can shoot up past 100°F while being frigid at night.
Temperate climates are generally warm summers with storms and mild winters. Plants can range from owls, raccoons, sparrows, meadowlarks, deer, and occasionally bears. This climate fluctuates the most in temperature compared to other climates. Plants can range from things like clover plants to a common bean.
Continental climates have mediocre summers with very cold winters. In the winter, snowstorms and strong winds are most likely. Sometimes, the temperature can drop below -22°F. Plants can range from Lavender and fern to Carolina Lupine and Silver maples. Animals can consist of squirrels, chipmunks, prairie dogs, skunks, and raccoons.
Polar climates are frigid. Its cold year round. There's animals such as polar bears, foxes, wolves, and caribou. Plants can vary from Tundra moss to Arctic Willow. Plants are generally smaller and are more like tiny shrubs.
Hope this helps.
Which scientists used the word cell for the structure he observed when he examined a piece of cork under microscope
Answers
Answer:
Rober hook.
Explanation:
The spinal cord is most important for: Group of answer choices Production of routine behaviors, such as walking Voluntary behaviors such as reaching for a pencil Regulatory behaviors, such as maintaining body temperature Receiving sensory information and carrying commands to muscles
Answers
Answer:
Receiving sensory information and carrying commands to the muscles.
Explanation:
The spinal cord serves as the transmission conduit for the passage of action potential as sensory information through the sensory/afferent neurons to the dorsal roots of the spinal cord.The information synapse with the inter neurons,branching off to the brain and emerged as the response through the motor/efferent neurons to the effectors(muscles).
This pathways is called reflex arc. Thus most of the involuntary action of the body is conducted through the spinal cord
Answer:
Explanation:
Spinal cord is made of tissue and it runs from the medulla oblongata in the brain to the vertebral column in the lumbar region.
Functions
Receiving sensory information and carrying commands to muscles
They receive sense of body movement through receptors which then travels along the spinal cord.
They also transmit information through impulses to the brain using the nerves cells this include pain and pressure.
They also control voluntary and involuntary movement such as walking neurons that controls voluntary actions passes through the spinal cord.
Does anybody know this answer
Answers
Answer:
B. 10
Explanation:
300/30=10
Topic: Human Impact on the Environment
Deforestation
Deforestation is viewed as a problem in the
world today. Describe a cause and an effect of
deforestation and a way to lessen this effect.
In your answer, be sure to:
1. State one reason deforestation is occurring.
Add text here!
2. State one environmental problem that results from widespread deforestation.
Add text here!
3. State one way to lessen the effects of deforestation, other than planting trees.
Add text here!
Answers
1) One reason why deforestation is occuring because people need wood from trees to build things, therefore, leading them to cuting countless of trees.
2) One environmental problem that results from widespread deforestation is that the carbon dioxide they would normally use remains in the atmosphere, therefore, promoting erosion.
3) One way to lessen the effects of deforestation is by re-planting the cut-down trees and by cutting down less trees.
Genetic analysis identified a 10 kb segment of human DNA that correlated to a protein-encoded disease phenotype. How would you use at least three methods to identify the 1 nucleotide in this 10 kb that is responsible for the disease phenotype? Note that there are on average ~8 nucleotide polymorphisms in 10 kb. You do have family members, model organisms, and a biochemical assay available to you.
Answers
Explanation:
In the given question, the DNA segment of human can be sequenced or analysed through three processes:
2. DNA sequencing: DNA sequencing is the method by which the sequence of the nucleotides which are adenine, thymine, guanine and cytosine are sequenced in the correct order.
1. DNA probes: probes are synthesised nucleotide sequence which binds to specific sites of DNA. Since these probes are complementary to the specific region therefore the DNA polymorphic sequence can be sequenced.
3. Polymerase chain reaction: PCR is the technique which can amplify or replicate the DNA sequence but this involves the isolation of specific DNA sequence.
someone suggested that everything to be sent to the base on moon must be sterilized so that no bacteria of any kind are present.
Do you thing this is a good idea?
Answers
Answer:
yeah probably
1.Different protists use cilia, _______, or pseudopodia to move.
2.Green algae are closely related to plants, and _______ is what gives them their green color.
3.Protists in the genus plasmodium must live in host cells and harm their host cells, providing an example of a _______ relationship.
4..Why have scientists recently rejected classifying protists in their own kingdom?
5..What are the three main ways that protists can move?
6.The eukaryote that causes red tide is known as what?
7.The organisms that push carbon to the bottom of the ocean are known as what? Why is this important to the ecosystem?
8.How is the endosymbiotic theory used to support the emergence of Eukaryota?
Answers
Answer:
flagella
chlorophyll
parasitic
Scientists have recently rejected "Protista" as a kingdom because as evolutionary and molecular knowledge continues to increase, the relationships among organisms are strengthened that weren't previously considered. It continues to be found that many protists don't share common ancestry with other protists that don't exclude other groups, such as plants, animals, and fungi. Protists had been previously classified through what they are not: plants, fungi, or animals. They share no characteristics that aren't also shared by "nonprotists."
The three main ways protists can move are through cilia, flagella, and pseudopods. All of these structures help protists to move in different ways through their environment.
The eukaryote that causes red tide is known as a dinoflagellate.
The eukaryotes that push carbon to the bottom of the ocean are known as diatoms. This is important to the ecosystem because it lowers the overall carbon dioxide levels in the air and buries the carbon deep in the sea.
The endosymbiotic theory posits that eukaryotes emerged when one or more prokaryotic cells ingested another prokaryotic cell, leading to the eventual eukaryotic cell.
Explanation:
Answer:
1. flagella
2. chlorophyll
3. parasitic
4. Scientists have recently rejected "Protista" as a kingdom because as evolutionary and molecular knowledge continues to increase, the relationships among organisms are strengthened that weren't previously considered. It continues to be found that many protists don't share common ancestry with other protists that don't exclude other groups, such as plants, animals, and fungi. Protists had been previously classified through what they are not: plants, fungi, or animals. They share no characteristics that aren't also shared by "nonprotists."
5. The three main ways protists can move are through cilia, flagella, and pseudopods. All of these structures help protists to move in different ways through their environment.
6. The eukaryote that causes red tide is known as a dinoflagellate.
7.The eukaryotes that push carbon to the bottom of the ocean are known as diatoms. This is important to the ecosystem because it lowers the overall carbon dioxide levels in the air and buries the carbon deep in the sea.
8.The endosymbiotic theory posits that eukaryotes emerged when one or more prokaryotic cells ingested another prokaryotic cell, leading to the eventual eukaryotic cell.
Explanation:
Over abundance of nutrients in the water is most likely to cause harm to which group of organisms?
A. Any organism that uses calcium carbonate to build support or protection.
B. Top tier predators that eat a lot of smaller fish
C. All organisms because it creates giant dead zones where nothing can survive.
D. Human populations through sea level rise
Answers
Answer:
Option-C
Explanation:
The flow of nutrients from the sewage and industries is the cause of the nutrient pollution in water bodies. These chemicals get accumulated in the water bodies affecting the aquatic ecosystem to a very large extent.
The increased level of nitrogen and phosphorus causes eutrophication which is also known as algal-boom. These nutrients cause the massive growth of algae which decreases the oxygen level of the water bodies. This increases BOD level of the water bodies which does not allow the growth of other aquatic species.
As a result of this, the dead zones are created where nothing can survive and therefore is the correct answer.
Thus, Option-C is the correct answer.
Help me with this science problem please!
Answers
Answer i am not sure but pls i need points really fast
Explanation:
Select all that apply.
If you wanted to try and identify or classify archaea or eubacteria, you would _____
Answers
Since the options are not given, the question is incomplete. The complete question is as follows:
Select all that apply.
If you wanted to try and identify or classify archaea or eubacteria, you would _____
study their habitat
study their genetic make-up
study their shape and arrangement
conduct Gram staining
study how they gain energy and nutrients
study how they move
Answer: study their habitat
study their genetic make-up
conduct Gram staining
Explanation:
Study their habitat: The members of domain Archea can be identified easily as these organisms are thermophiles and halophiles which means they can be found in extreme heat and extreme saline conditions. Eubacteria are prokaryotic organisms that can be found everywhere on planet Earth.
Study their genetic make-up: Although the members of domain Archea and domain Eubacteria are prokaryotes but they can be identified as separate organisms through their genetic-make up.
Conduct Gram staining: The cell membranes of the Archea do not possess peptidoglycan thus they take up the gram negative stain. The eubacteria may take up gram positive or gram negative stain.
choose the correct. I will mark you brainliest.
Answers
Answer:
option b i.e. moth oesophagus,stomach,small intestine, large intestine , anus
Explanation:
please follow me.....
The magnetic field lines of a magnet spread out from theand re-enter the magnet at the.
Answers
Answer:
north pole, south pole
Explanation:
Answer:
NORTH SOUTH
Explanation:
The chemical equation below summarizes cellular respiration. 6O2 + C6H12O6 à 6CO2 + 6H2O + energy The energy that is released by cellular respiration is in the form of dark energy. solar energy. nuclear energy. chemical energy.
Answers
Answer:
chemical energy
Explanation:
Which phenomenon does not require the air temperature to be at 0°C? A. ice crystal formation B. hail C. cloud formation D. sleet E. snow
Answers
Answer:
B. hail
Explanation:
Consider a locus with two alleles, A1 and A2. Mutation happens at this locus, but in a way such that A1 mutates to A2 with probability u and A2 mutates to A1 with probability v. If u = v (and neither of them = 0), the equilibrium frequency of the A1 is expected to be [Hint: set u and v to specific numbers that are equal to see what happens]:
Answers
Answer:
The equilibrium frequency of the A1 (p = v/(u+v)) is expected to be equal to the equilibrium frequency of the A2 (q = 1 - p)
Explanation:
Available data:
Locus with two alleles, A1 and A2The probability of A1 mutating to A2 is P(A1->A2)=uThe probability of A2 mutating to A1 is P(A2->A1)=vV=Unor V or U is equal to cerop is the frequency for A1 and q is the frequency of A2.The equilibrium frequency of the A1 is expected to be p = v/(u+v)
The equilibrium frequency of the A2 is expected to be q=1-p=1 - (v/(u+v))
For example, if V = U = 0.005, then
p = 0.005/(0.005+0.005) = 0.005/0.01 = 0.5q = 1-p = 1-0.5 = 0.5The equilibrium frequency of A1 = The equilibrium frequency of A2. The rate of mutation is equal for both alleles.
What is a possible benefit of studying plants in the rainforest? 1) The Plants may hold medicines to treat human diseases - 2) The plants may produce need it carbon dioxide - 3) The plants may be cut down and sold in floral shops - 4) The Plants may make Toxins for human consumption
Answers
Answer: The plants may produce needed carbon dioxide.
Explanation:
This is the only benefit as medicine needs to be found, they won't be cut down, and they do take in toxins but it does not affect the study
Bacteria are known to change the kinds of fatty acids they produce as the temperature of their environment changes. What types of changes in membrane fatty acids would you expect as the temperature drops? Why?
Answers
Answer:
Bacteria has the ability to adapat according to the changes in the temperature. Bacteria has fatty acid cell membrane and can alter its composition to adapt the changes in temperature.
When the temperature drops, changes in the fatty acid membrane of bacteria are as following:
cell membrane become rigid and limit the flow of nutrients or decrease membrane fluidity.High concentrate of unsaturated fatty acids starts producing in order to fulfil the limited acitivity.Optimal temperature is required for the growth of bacteria, that is why bacteria changes cell membrane composition. If the nutrients flow will not be limited then it can affect the internal cells of the bacteria and it will not be able to survive inthe extreme conditions.
Hence, bacteria adapt according to the extreme temperature.
Some animals that try to adapt to climate changes eventually die due to starvation, as climate change alters the
Answers
Answer:many have gone into extinction because of climate change
Explanation:
Answer:
food web
Explanation:
edmentum/plato.
What is the most common reaction to flowers when haveing allergies ?
Answers
Answer:
Sneezing, coughing, dry nose and stuffy nose
Which enzyme help to lose weight ??
Answers
Answer:
Digestive enzymes
Explanation:
Digestive enzymes are substances that helpbreak down macronutrients into smaller compounds to promote their absorption.
Imagine that there is a direct correlation between feeding efficiency and reproduction (the more resources you can gather, the more offspring you can produce), and that feeding apparatus is heritable (that is, it can reliably be passed from parents to offspring). If there were a population that started out with equal proportions of individuals with each of the three feeding types, would the frequency of each type increase, decrease, or stay about the same in the next
Answers
Answer:
bsgshdgehehhfhgxtctfyfbfgjfjbxjf
Explanation:
njdjdjsndjdhdhdj
pls help answer the questions if you do not know all the question answer the ones you know
Answers
Answer:
1. A physical phenomenon produced by the motion of electric charge
3. north and south poles
4.no
5.yes
What is the "sugar code"? the differential expression of lectins across tissues the set of oligosaccharides present on the surface of a cell the genes encoding the pentose phosphate pathway enzymes the distribution of glucose transporters across cell types
Answers
Answer:
The correct answer to the following question will be Option A.
Explanation:
This kind of writing code would have been referred to this as the glycode resp. Code of sugar. This requires a powerful knowledge pool that could be represented by carbohydrate frameworks.Sugar code is found on the surface of the cell membrane throughout the presence or formation of glycoprotein. Glycoproteins provide oligosaccharide covering their substrate or layer or, according to the above, they fulfill their duties.Other given choices are not related to the given scenario. So that option A seems to be the right answer.
Humans have pores in their skin to sweat and cool off the body. Plants have similar structures called _____.
· pores
· tendrils
· stomata
· receptacles
Answers
Answer:
Stomata
Explanation:
Stomata are tiny pores in plant tissue that allow gas exchange, it can be found on the leaves of plants and sometimes the stems, the stomata are surrounded by guard cells which open and close the stomatal pores
In terms of its tissue classification, blood is classified as a ____(1)______tissue because it’s extracellular matrix determines its function. Blood is composed of living blood cells, called formed substances, suspended in a nonliving fluid matrix called ___(2)________. The "fibers" of blood only become visible during ______(3)____________.
Answers
Answer:
1. In terms of its tissue classification, blood is classified as a Connective Tissue because it’s extracellular matrix determines its function.
2. Blood is composed of living blood cells, called formed substances, suspended in a nonliving fluid matrix called Plasma
3. The "fibers" of blood only become visible during blood clotting.
i hope it's right
Explanation:
1. Blood is classified as connective tissue because it has living blood cells
2. Blood is a specialized type of connective tissue in which living blood cells, called the formed elements, are suspended in a nonliving fluid matrix called plasma
3. BLOOD: It is considered a connective tissue, because it consists of blood cells surrounded by a nonliving fluid matrix called blood plasma. It is the most atypical connective tissue: the fibers of blood are soluble protein molecules that become visible during blood clotting
