Answer:
See the answer below
Explanation:
At the G2 checkpoint, the accuracy of chromosome replication is assessed along with the cell size and proteins within the cell. The cell division will only proceed if all the listed conditions appear all right.
At the M checkpoint, the correct attachment of spindles to the kinetochores of the sister chromatids of each chromosome is assessed. This is to ensure that chromosomes are correctly separated to the opposite poles of the cell.
Hey I know it's a lot who ever answer all I'm going to give brainliest answer thxs 1) DNA is a microscopic molecule made up of only _____ chemicals. 2) In the __________ all that was known about life was what could be seen through a _________________________. 3) Chromosomes are made of _______________ and ______________. 4) The ingredients that make DNA are known by the letters _____________________. 5) The first pictures of DNA were taken using _______________ crystallography. 6) To determine the structure of DNA, Watson & Crick chose to build _______________. 7) Watson & Crick announced they had a DNA model on _____________________. 8) After seeing the model, Rosalind Franklin said that it was _____________________. 9) Chargaff’s rule stated that the amount of _____ and the amount of _____ were equal and the amount of _____ and the amount of _____ were equal. 10) The X-pattern of DNA was the result of a shape known as a _________________________. 11) In a molecule of DNA there could be hundreds of millions of _____________________. 12) The letter ____ always combines with ____ and the letter ____ always combines with ____. 13) Watson & Crick produced their final model on _________________________. 14) Rosalind Franklin never received a Nobel prize because she _______________. 15) For DNA to be replicated it must first be _____________________. 16) The single strand of DNA is then ________________ and formed into a ________________.
Answer:
1) nitrogen bases
2) the 1950’s; microscope
3) DNA and protein
4) nucleotides
5) X-ray diffraction
6) ball-and-stick model-building
7) 25 April 1953
8) was critical to Watson and Crick
9) adenine-timine; guanine-citosine
10) double helix
11) base pairs
12) G with C and A with T
13) 1953
14) died
15) unwound
16) synthesized; a new molecule
Explanation:
Nitrogenous bases are used to construct nucleotides. Until the discovery of the helical shape of the DNA molecule, were only possible to identify the genetic material (chromosomes) by the microscope. Chromosomes are composed of DNA and proteins (histones). Nucleotides are the building blocks of the DNA molecule. The X-ray diffraction data obtained by Rosalind Franklin were used to decipher the DNA structure. The ball-and-stick is a molecular model where atoms are represented by spheres and bonds are represented by rods. Chargaff's rules indicate that the content of cytosine is equal to guanine and adenine is equal to thymine. Rosalind Franklin died of ovarian cancer in 1958. The double-stranded DNA molecule must be unwound and then the DNA strands serve as templates to synthesize identical DNA molecules.
Write TRUE or FALSE
(a)
A 'system' is the part of an organism that carries out a certain function.
Answer:
TRUE
Explanation:
A skin cell of a red fox has 34 chromosomes. You look at the cell under a microscope and see that it has 34 chromosomes and one nucleus. Several hours later, you look at the same cell a second time and see that it has double the amount of DNA and one nucleus. A little while later, you see the cell for a third time and notice that it has 68 chromosomes and two nuclei. What stage of the cell cycle was this cell in when you viewed it at each time point
Answer:
See the answer below
Explanation:
At the first look, the cell was in G1 phase of the cell cycle. At the second look, the cell was in the G2 phase of the cell cycle, and at the third look, the cell was in Telophase.
At the G1 phase of the cell cycle, the cell mainly experiences growth and development. Nothing much happens except that the cell increases in volume.
At the G2 phase of the cell cycle, synthesis of DNA has taken place during the S phase and the amount of DNA present in a cell is doubled at this stage.
At the telophase stage of the cell division in the cell cycle, chromosomes have completed their migration to the poles and each pole appears like a nucleus with their individual chromosomes under the microscope. The cytoplasm is yet to divide at this stage, hence, everything still appears as a single cell.
What has a greater influence on protein levels?
Answer:
B : mRNA destroyer concentration has a greater influence because it is destroying mRNA before proteins can even be produced.
Explanation:
The opposable thumb is a trait that connects us to other primates; allowing us to grab and use tools and increasing chances for survival. This means it is a(n) __________.
Answer:
The options to this question are;
A. genotype
B. adaptation
C. selective pressure
D. stabilizing pressure
The answer is B) Adaptation
Explanation:
Adaptation is the process whereby an organism becomes well suited to survive in its natural environment, which is aided by the possession of certain traits called adaptive features. For example, the fins of a fish makes it fit to survive in an aquatic environment, likewise the opposable thumbs of humans make us well suited to survive in our environment.
As stated in the question, the opposable thumb i.e. movement of the thumb independently of the other four fingers, is a characteristics of primates. This unique feature (opposable thumb) allows us to grab things, get a good grasp of tools, use tools effectively, write things, etc. All these ability due to the possession of opposable thumb increases our chances of survival. Hence, the possession of opposable thumb is regarded as an ADAPTATION
why is the linner wall of alimantary canal not digisteg although the digestive enzymes can digest all the materials that make cell?
Answer:
There are no options to this question but it can be answered by giving a general explanation. The answer is:
Because the digestive enzymes are not in direct contact with the cells that make up the walls of the alimentary canal. The walls are protected by mucuous lining.
Explanation:
Digestion of our ingested food is an important process for the effective functioning of our body system. Digestion is the process whereby food, which are usually macromolecules, are broken down into simpler molecules usable by the body. After food is taken in from the mouth (ingestion), it must be broken down by chemical and mechanical means.
The chemicals means is through digestive enzymes, which are proteinous chemical substances. The digestive system consists of the alimentary canal or digestive tract, which is a tube-like organ that forms the path for food passage. Since digestive enzymes secreted during digestion can disintegrate every macro biomolecule e.g protein, carbohydrate etc, it can also break down the molecules that make up the cells of the tract wall.
However, the digestive enzymes does not break down the cells of the canal's wall because the body system secretes mucus, which lubricates the passage of food along the canal. It also prevents the digestive enzymes from coming in contact and acting on the macromolecules that make up the cells of the walls of the alimentary canal.
Your forest has three domains: certguide and its two children domains west.certguide and east.certguide. The west domain runs at domain functional level 2012 R2. The east domain runs at domain functional level 2008. You have been tasked with bringing the entire forest to forest functional level 2016. How would you approach raising the east.certguide domain
Answer: It's worth noting that, the recommended upgrade path is to demote existing servers and promote new servers whenever you can. If that is not possible in your environment, you can run in-place upgrades from Server 2012 R2 to Server 2016.
In glycolysis, pyruvate, ATP, and NADH are produced. The lactic acid fermentation process uses the NADH molecule from glycolysis to convert pyruvate into lactate. During lactic acid fermentation, the NADH molecule transfers electrons to the pyruvate molecule and is converted to NAD+. How do you think this transfer of electrons helps the lactic acid fermentation process repeat itself? will give brainliest
Answer:
Explanation:
Fermentation does not involve an electron transport system, and no ATP is made by the fermentation process directly. Fermenters make very little ATP—only two ATP molecules per glucose molecule during glycolysis. ... During lactic acid fermentation, pyruvate accepts electrons from NADH and is reduced to lactic acid.
The NADH needed to convert pyruvate to lactate is supplied by this reaction of glycolysis, so the transfer of electrons helps to repeat the lactic acid fermentation process as lactate is reduced to pyruvate to regenerate NAD+ which is are reused for uninterrupted operation.
What is Glycolysis?Glycolysis is defined as the metabolic pathway that converts glucose to pyruvate where the free energy released in this process is used to form the high-energy molecule adenosine triphosphate and the lesser nicotinamide adenine dinucleotide. It is a sequence of ten reactions catalyzed by enzymes.
During glycolysis , ATP and NADH are produced where lactic acid fermentation process uses NADH molecule from glycolysis molecule to convert pyruvate to lactate. During lactic acid fermentation, NADH transfers its electron to pyruvate and is oxidized to NAD+ while pyruvate is reduced to lactate.
NAD+ assisted dehydrogenation and phosphorylation of glyceraldehyde-3-phosphate (G3P) to 1,3-biphosphoglycerate (1,3-BPG) is coupled to lactate production where NADH is supplied to convert pyruvate to lactate, hence, the transfer of electrons helps the lactic acid fermentation process to repeat itself as the reduction of pyruvate to lactate regenerates NAD+ which is reused for uninterrupted operation
Thus, the NADH needed to convert pyruvate to lactate is supplied by this reaction of glycolysis, so the transfer of electrons helps to repeat the lactic acid fermentation process as lactate is reduced to pyruvate to regenerate NAD+ which is are reused for uninterrupted operation.
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Which of the following statements is true?
Photosynthesis is a type of homeostasis.
Unicellular organisms have differentiated cells.
Respiration is a type of metabolism.
Multicellular organisms are made of only one cell.
Answer:
Respiration is a type of metabolism.
Answer:
C. Respiration is a type of metabolism
Explanation:
Both B and D are incorrect because:
Multicelluar organisms have more than one cell; while singlecelled organisims only have one cell.
Also, homeostasis is a natural way an organisms body reacts to different situations, like when you sweat, your body is realising a way to lower the heat in your body. Therfore, A. is also incorrect.
Hope this helped!
Which of the following contributes to the movement of tectonic plates?
I. Push of newly formed crust
II. Pull of subducting plate
III. Weathering of continental
crust
A. I only
B. III only
C. I and II
D. II and III
Answer:
option D is correct
Explanation:
Take the subducting plate out, Tectonic plate movement is aided by the weathering of continental crust.
The correct answer is D
Explain what a tectonic plate is.?Tectonic plates are huge pieces of the Earth's crust and upper mantle. Oceanic and continental crust both make up their structure. Earthquakes take place at mid-ocean ridges in addition to the main faults that define the borders of the plates.
Why do tectonic plates form?Convection currents are created by the intense heat and pressure that exists within the earth. The tectonic plates that make it up the earth's crust shift as a result of these currents.
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7. Health Medicine, alcohol, and
many drugs are detoxified in
liver cells. Why do you think
the liver cells of some people
who abuse alcohol and drugs
have an increased amount of
smooth ER?
Which kind of cells do plants and animals have?
Answer:
Animals and plants are made of cells. Tissues are made from cells of a similar type. Organs are made from tissues, and systems are made from several organs working together.
Explanation:
Answer:
Eukaryotic
Explanation:
They have membrane-bound organelles such as the nucleus and mitochondria.
explain the importance of reproduction in organisms
Answer:
Reproduction is an important characteristic feature of living organisms. It is an essential life process which not only helps in survival but also helps in continuity of that race and group immortality, as by reproduction. Reproduction also helps in increasing the population of the species.
Answer:
Explanation
The biological process in which living organism produce their own kind by asexual and sexual method is called reproduction.
Importance of reproduction
Reproduction helps to continue life on earth.Reproduction helps individuals to continue the species and genus.Reproduction is the source of food in an ecosystem.Learn more:
Is reproduction important to the survival of an individual? Why would you say that living things reproduce if some individual living things may not reproduce?
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CAN SOMEONE HELP ME Effects of rays and chemicals on cell
Explanation:
They have very high levels of chemical reactivity, and therefore generate indiscriminate chemical reactions
Radiation and electrons bombarded by radiation move haphazardly inside the cell, resulting in damage to the various molecules forming the cell.
Chromosomal DNA inside the. cell nucleus can also be damaged
hope this helps
Individual "A" produces 10 offspring, 8 of whom survive to adulthood. Individual "B" (a member of the same population) produces 15 offspring, 7 which survive to adulthood. Based on the concept of natural selection, individual "A" has the higher fitness.a) trueb) false
In natural selection when more offspring is survived is a sign of higher fitness of the particular population, hence given statement is true.
What is natural selection?Most qualities are inherited, there are more children generated than can survive, and offspring with more advantageous features will survive and have more offspring than those with less advantageous traits leading to the inevitable process of natural selection.
Since there are only so many resources available, more creatures are born than can live those who are better at obtaining food.
Mating or evading predators will have a higher chance of thriving, procreating, and passing on their DNA.
Therefore an individual in the population has offspring to survive more in number.
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Predict which of the following can impact an ecosystem's available resources?
Answer:Long term drought, change of season from winter to summer, forest fire are unfavorable environmental factors which can deplete the amount of resources already available with the ecosystem. The long term drought will be a condition in which the ecosystem will suffer from non-availability of water.
Explanation:
Why does the DNA that makes up the chromosomes need to replicate before the start of meiosis?
Explanation:
DNA replication needs to occur because existing cells divide to produce new cells. ... So the DNA needs to be copied before cell division so that each new cell receives a full set of instructions!
Plsss helppppp ASAP
Will give extra 20 points
1) 2
2) 3
3) The type of pot or soil does matter
4) Using different types of soils, fertilizers, pots and putting them in different places
5) I'm sorry but I can't draw the graph
Because he was well aware of the effect his theory of evolution would have on the public and on the Church of England, Darwin delayed publishing his work for several decades while he gathered additional evidence. After invoking selective breeding of domesticated species as evidence that groups of organisms are capable of change, he then proposed that natural populations can change as well. On which two lines of evidence did he base this proposal? a) Individuals within a population vary, yet island species around the world all appear to be related to each other.b) Organisms produce more offspring than can be supported by their environment, and adaptations to specific environments increase an organism's ability to survive and reproduce.c) Organisms within a population vary, and all populations produce more offspring than can be supported by the environment, resulting in competition for survival within the population.d) Some individuals leave more descendants than other individuals, but the individuals in a population are essentially identical to each other.e) Some individuals within a population have greater success in survival and reproduction than others, and favorable traits within a population will accumulate over generations.
Answer:
c) Organisms within a population vary, and all populations produce more offspring than can be supported by the environment, resulting in competition for survival within the population.
Explanation:
Darwin's theory was based on the evidence of natural selection and survival of the fittest.
Evidence of Darwin's theory were observed from the variation in the population which is supported by the environmental factor (natural selection) and these population than produce offspring, resulting in competition for survival within the population (survival for fittest).
Hence, the correct option is "c".
Plants are autotrophs because they can prepare their own food. Photosynthesis takes place in leaves. Leaves contain that allow for the exchange of gases during the process, and also help with the process of
Leaves contain stomata that allow for the exchange of gases during the process, and also help with the process of transpiration.
What is photosynthesis?Photosynthesis is the process by which green plants manufacture their own food in the presence of sunlight.
Factors that affects photosynthesis are:
Presence of sunlightStomata, which controls the rate of gas exchange in plantThus, leaves contain stomata that allow for the exchange of gases during the process, and also help with the process of transpiration.
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Answer:
Stomata and Transpiration on edmentum
Explanation:
what part of the universe do we live in??
About thirteen different species of finches inhabit the Galápagos Islands today, all descendants of a common ancestor from the South American mainland that arrived a few million years ago. Genetically, there are four distinct lineages, but the thirteen species are currently classified among three genera. The first lineage to diverge from the ancestral lineage was the warbler finch (genus Certhidea). Next to diverge was the vegetarian finch (genus Camarhynchus), followed by five tree finch species (also in genus Camarhynchus) and six ground finch species (genus Geospiza). If the six ground finch species have evolved most recently, then which of these is the most logical prediction?
Answer: Firstly it should be noted that, the chances of hybridization between two ground finch species should be less than the chances of hybridization between two tree finch species. On this wise, their genomes would be more similar to each other than are the genomes of the five tree finch species. Secondly, they should be limited to the six islands that most recently emerged from the sea.
Thirdly, they should share fewer anatomical homologies with each other than they have shared with the tree finches.
Fourtly, their genomes should be more similar to each other than are the genomes of the five tree finch species.
Choose all the answers that apply.
Groundwater is used for:
irrigation
drinking water
fire hydrants
wells
Answer is: All of the above
Explanation:
Groundwater supplies drinking water for 51% of the total U.S. population and 99% of the rural population. ... 64% of groundwater is used for irrigation to grow crops. Most wells do not get their water from underground rivers. Hydrants are connected to our drinking water.
Answer:
irrigation drinking waterfire hydrantsExplanation:
The water is either stored in aquifers or slowly pulled downhill by gravity, where it will eventually seep into streams, lakes, and oceans. Wells can be drilled into aquifers to pump out water for irrigation, drinking, fire hydrants, and other uses. Many local and state water departments depend on groundwater for public use. In 2000, almost 20 percent of freshwater used in the United States came from groundwater.
Please help me, I don't understand this
Answer:
4, based on the assumption that the R allele is dominant over the r allele, and that the T allele is dominant over the t allele.
Explanation:
Any bush with a dominant petal color allele (R) will have red petals. This includes Rr and RR.
Any bush with a dominant bush size allele (T) will have a tall bush. This includes Tt and TT.
The only way to acquire a short bush or pink petals is to have two recessive alleles together (tt, rr).
RRTT, RrTT, RRTt, and RrTt -> red petals with tall bushes
RRtt, Rrtt -> Red petals with short bushes
rrTt, rrTT -> pink petals and tall bushes
rrtt-> pink petals with short bushes.
These are the four phenotype variations possible in this dihybrid cross.
What is absorbed into the blood stream in small intestine and large intestine ?
Answer:
Digested food molecules
Explanation:
Afferent neurones connect?
A the brain and spinal cord to muscles
B sense organs to muscles.
C one sense organ to another sense organ
D sense organs to brain and spinal cord
Can someone explain to me the answer because I'm confused.
Answer:
These neurons are located in the central nervous system (the brain and spinal cord). Afferent and efferent neurons have to work together in order to sense and respond to stimulus, but they don't directly connect. Association neurons bridge the gap to relay information between sensory and motor neurons.
PLEASE ANSWER ASAP!!!!!!!! ITS DUE IN 5 MINUTES.
1.) How do organisms benefit from Mitosis? Write a paragraph using at least five sentences.
Answer:
Organisms benefit from mitosis because mitosis helps regenerate cells. This helps them recover from injuries and more.
Explanation:
In ______ immunity the individual produces antibodies against particular pathogens while in ______ immunity the individual is given specific antibodies against a pathogen. Group of answer choices
Answer:
The correct answer is - active and passive.
Explanation:
Immunity is the capability of multicellular organism to protect itself from harmful molecules that are foreign to the body such as microorganism and antigens. Immunity can be active immunity or the passive immunity.
Active immunity takes place when one's own body produces antibodies to fight against a particular disease or antigen by immune system where as passive immunity occurs when an individual receives antibodies from outside and produced outside.
Thus, the correct answer is - active and passive.
SOCIEDAD PERUANA DE DERECHO AMBIENTAL (SPDA): ¿Cómo se generaron? ¿Cómo se sostienen? ¿Qué acciones realizan?
Answer:
La sociedad peruana de derecho ambiental fue fundada en 1986. Surgió como una idea para reconocer a comunidades, organizaciones y personas que trabajan en pos del cuidado de la naturaleza para todos. Se sostienen a través de donaciones. La SPDA busca la conservación ambiental a través la promoción de legislación y políticas ambientales, diseñando e implementando instrumentos para el desarrollo sostenible dentro de un marco de equidad, justicia y gobernanza.
Explanation:
La Sociedad Peruana de Derecho Ambiental (SPDA) es una ONG. Sus funciones las realiza dentro de diferentes temáticas: Justicia ambiental, cambio climático, bosques y fauna silvestre, fortalecimiento de la gestión ambiental, pueblos indígenas y territorios, biodiversidad y áreas naturales protegidas, inversiones sostenibles, gobernanza marina e hídrica, ciudadanía ambiental, comunicación ambiental y agrobiodiversidad y conocimientos tradicionales. Llevan más de 250 iniciativas de conservación voluntarias.
The plasma membranes of the __________ bear enzymes referred to as brush border enzymes, which complete the digestion of carbohydrates and proteins in the small intestine."
Answer:
Microvilli
Explanation:
The microvilli are microscopic in nature, they form projections on cell membranes which helps to increase the surface area of the membrane, which further enables diffusion. Microvilli are mostly found in the small intestine and they work together with villi to increase the absorption of nutrients in the small intestine.
In addition, they also involved in the secretion of enzymes called brush border enzymes that aids the easy and complete digestion of carbohydrates and Protein. One of such enzymes are the glycosidases which digest carbohydrates.
