Answer:
D.
Explanation:
because.
Gametes are produced as a result of meiosis.
What are the different stages of meiosis ?
The meiosis is divided into Meiosis I and Meiosis II, each stage subdivided into sub phases.
In prophase I of Meiosis I, nuclear envelope disintegrates, Chromosomes condensed and Spindle fibres are formed.
In Prometaphase II, Spindle fibres bind to the chromosomes at the centromere.
In Metaphase I, homologous chromosomes align at the equatorial plate.
Anaphase I where chromosomes are move towards the opposite poles.
In Telophase I, Spindle fibres disappear, reformation of Nuclear envelope; In Cytokinesis I, 2 non-identical diploid daughter cells are produced.
In Prophase II of meiosis II same event occur like prophase I.
In Metaphase II chromosomes align along the equatorial plate; In Anaphase II, Sister chromatids move to opposite poles.
Telophase II where Nuclear envelope reappear and the spindle fibres disappear; Cytokinesis II where cell divide into 4 non-identical haploid daughter cells.
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The wells that contain the DNA samples are placed next to the negatively charged electrode in the electrophoresis box (chamber) because _______. Group of answer choices DNA strands have both a positive and a negative charge DNA is negatively charged DNA is positively charged DNA has no electrical charge
Answer:
DNA is negatively charged
Explanation:
Electrophoresis: In biology, the term "electrophoresis" is described as one of the different laboratory technique that is being utilized to separate protein molecules, DNA, and RNA one the basis of their electrical charge and size. Therefore, a specific amount of "electric current" is being used to move different molecules that are required to be separated through a "gel". The given gel contains pores that generally works like a "sieve" and thus allows every small molecule to proceed faster as compared to the larger molecules.
DNA stands for "deoxyribonucleic acid" is determined as a long molecule that ought to contain an individual's unique "genetic code" and generally carried information associated for making proteins in an individual's body.
In the question above, the correct answer is "DNA is negatively charged".
The samples of DNA are placed next to the negatively charged electrode in the electrophoresis as DNA is negatively charged.
What is electrophoresis?It is a laboratory technique, which is used to distinguish RNA, DNA or molecules of protein on the basis of their electrical charge and size. In the process, an electric current is utilized to move molecules to be separated via a gel. The gel comprises pores that functions as a sieve, which permits smaller molecules to move faster in comparison to larger molecules.
DNA is a negatively charged molecule, thus, when it is used in the process of electrophoresis, the migration of DNA will take place towards the positively charged electrode. Through the gel, the DNA with shorter strands will move more briskly in comparison to the longer strands leading to the formation of fragments being aligned in order of size.
Thus, the samples of DNA are placed next to the negatively charged electrode as they are negatively charged.
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URGENTT!
does a fire take food for energy?
does a fire reproduce?
does a fire produce waste?
Answer:
Yes, a fire takes food for energy.
No, a fire doesn't reproduce.
Yes, a fire produces waste.
Explanation:
For fire, the food that it requires is the objects that help in the process of burning. The objects can be wood, paper, coal, fuel, etc. Oxygen is required for the process of burning to take place.
The process of reproduction undergoes in living beings. Fire produces heat and light but this cannot be termed to be a process of reproduction.
Burning produces wastes in the form of ash and burned products. Therefore, it can be said that fire produces wastes.
what is photosynthesis
Answer:
Photosynthesis happens in the leaves of a plant.
This is a chemical reaction, which takes place inside a plant, producing food for the plant to survive. For photosynthesis to take place, carbon dioxide, water and light are needed.
I HOPE THIS HELPED YOU :)
Answer:
Photosynthesis is the process by which plants make their food.
Explanation:
photosynthesis in plants involve the green pigment called chlorophyll and generates oxygen as by-product.
PCR is used to – DNA. It uses – to separate a DNA molecule, and then uses a(n) – to start – at a point selected by scientists. This technique can produce millions of – of a targeted DNA sequence.
Answer:
The correct answer is - amplify, heat, primer, replication and copies.
Explanation:
Polymerase chain reaction is known as PCR. PCR is also known as a method that rapidly produce millions to billions copies of atargeted DNA sequence. It is widely used method for the separation of small DNA and amplify it to large amount to study by scientists.
So, the missing parts of the paragraph would be -
PCR is used to amplify DNA. It uses heat to separate a DNA molecule, and then uses a primer to start replication at a point selected by scientists. This technique can produce millions of copies of a targeted DNA sequence.
Thus, the correct answer would be -amplify, heat, primer, replication and copies.
Evolution is change in a population over time and includes the gene pools of that population. How does biogeographic isolation allow for the change of gene pools over time?
Biogeographic isolation affects the random changes that take place within gene pools.
Biogeographic isolation causes changes in gene pools that result from populations being separated.
Biogeographic isolation determines who will win competition for mates.
Biogeographic isolation determines the time that populations will breed
Answer:
Biogeographic isolation causes changes in gene pools that result from populations being separated.
Explanation:
Biogeographical isolation consists in the separation of a population by a geographical barrier, giving rise to subpopulations.
With isolation, the subpopulations start to suffer different pressures from the environment and consequently the selected genes in one subpopulation will be different from the other subpopulation.
Due to the biogeographic isolation, the two subpopulations will be prevented from crossing and the differences between them will become more and more accentuated, and with that the subspecies appear.
Over time, these subspecies may become so different from each other that reproduction between them becomes impossible.
When this happens, reproductive isolation occurs and, consequently, the emergence of new species. When speciation occurs due to geographic isolation, it is called allopatric speciation.
Answer:
Biographic isolation causes changes in gene pools that result from populations being separated.
Explanation:
I took the test
Phylogeny is the type of classification that names and identifies different organisms primarily by their: A. Physical similarities B. Similarity to humans C. Physical differences D. Evolutionary relationships
Answer:
D. Evolutionary relationships
Explanation:
phylogeny describes the relationships of organisms which evolved on most closely related species
Phylogeny is the type of classification that names and identifies different organisms primarily by their evolutionary relationship. The correct option is D.
What is phylogeny?Phylogenetics is the analysis of the evolutionary history and interactions between or within organism groups in biology.
Phylogenetic inference methods that concentrate on observed heritable traits, including such DNA sequences, protein amino acid sequences, or morphology, are used to determine these relationships.
Thus, the correct option is D.
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Labrador retrievers may have yellow fur, chocolate fur, or black fur. Coat color is determined by two genes. "E" determines dark coat and "e" light coat color. "B" determines whether the dark fur will be black, which is dominant, or brown. If you mate two chocolate labs together, what color offspring can they have
Why is the frequency of natural disasters increasing? Select one: a. There are less natural hazards occurring. b. Human population in areas prone to natural hazards has increased. c. Deaths from natural disasters has decreased in developed countries and increased in developing countries.
Answer:
I hope option c is the correct answer.
Explanation:
As for option 1 its totally in correct. for option 2 human population is not always greater in the disaster places.for option three developed countries are developed with all the determined factors but developing countries dont see all the factors as they destroy nature while making road which causes landslide, which causes death.Hope it helps...
Answer:
Option C
Explanation:
I believe Option C is the correct answer
Identify the various items used for micro farming and list out their nutritional benefits.
Answer:
While their nutrient contents vary slightly, most varieties tend to be rich in potassium, iron, zinc, magnesium and copper (2, 3 ).
Microgreens are also a great source of beneficial plant compounds like antioxidants ( 4 ).
Explanation:
What could happen if the cell cycle for the cells in your pinky finger stopped functioning properly? (Check all that apply.)
Answer:
Hello, you did not enter the answer options, but I can help you by explaining what would happen in this case.
if the cell cycle of the cells in your little finger stops working properly, two things could happen. First, if these cells were unable to start and complete the cell cycle, your finger would be unable to heal cuts and bruises that could happen to it, on the other hand, if these cells were unable to end the cell cycle, your finger would develop cancer .
Explanation:
The cell cycle allows the cells of your circus, in this case, of your little finger, to multiply and create exactly the same cells. This process is very important to not only make your finger grow, but also to be able to heal cuts and bruises, regenerating the tissues and skin of your finger.
Unfortunately, over time, or as a result of some factors, cells may have defects in the cell cycle. In short, if the cells are unable to start and complete the cell cycle, your finger will be unable to create new cells and regenerate tissues and skins if your finger is cut or injured. In addition, the cells may not be able to finish the cell cycle and multiply in an exaggerated and unregulated way, generating a cancer in the finger.
Every animal has a distinct body plan.
Which of these animals has a radially symmetrical
body plan?
Answer:
phyla Ctenophora (comb jellies) and Cnidaria (corals, sea anemones, and other jellies).
Explanation:
Hope it helps.
Answer:
I didn't mean to comment this
Explanation:
"As a healthier alternative to French fries, some fast food outlets offer pre-sliced, bagged apples as a side option. The ingredients list often reads, "Apples and Ascorbic Acid." Ascorbic acid is another name for vitamin C. What role does the ascorbic acid play in the product?"
Answer:
Answer in explanation
Explanation:
Absorbic Acid is used as an antioxidant and it helps the product stay fresh and look good in color. It will also add a citrus flavor and it prevents microbial growth which will not let it spoil easily
The body needs it to aid in wound healing, improve iron absorption from plant-based meals, and boost the immune system. It functions as an antioxidant to shield your cells from free radicals, which may contribute to cancer, heart disease, and other illnesses.
What role does the ascorbic acid play in the product?Fruit development and postharvest storage are significantly regulated by ascorbic acid, which also impacts fruit ripening and stress tolerance. It has been extensively investigated how plants use ascorbic acid in their metabolism.
Some people may experience negative side effects from vitamin C, including headaches, nausea, heartburn, and stomach cramps. With bigger doses comes a greater likelihood of experiencing these adverse effects.
Therefore, utilized as an antioxidant, absorbic acid keeps products fresh and attractively colored. Additionally, it will give it a citrus flavor and stop microbial growth, which will keep it from spoiling quickly.
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From watching his wife struggle to keep track of the family finances, Intuit founder Scott Cook identified the need for easy-to-use financial software that provided a single place for managing bills, bank accounts, and investments. This is an example of which innovator DNA trait
Answer:
It is observing
Explanation:
In observing innovator DNA trait, innovators or observers carefully and consistently search out for any little behavioral details in the activities of customers, suppliers, and other companies so that they will gain insights and knowledge about new ways of doing things.
From watching his wife struggle to keep track of the family finances, Intuit founder Scott Cook identified the need for easy-to-use financial software that provided a single place for managing bills, bank accounts, and investments is observing because he look out carefully for any little behavioral details in on how his wife handle business related financial activities in the home so that he will gain new insights on how to do things in a new way.
When does the separation of sister chromatids occur? A. Meiosis 1 B. Meiosis 2 C. Before Meiosis D. After Meiosis
Answer:
option B is correct that is meiosis 2
Explanation:
the two sister chromatids are separated from each other into two different cells during mitosis or during the second division of meiosis
Warm-Up
Sort these resources into renewable and nonrenewable resources.
0
fossil fuels
Renewable Resources
water
wind
geothermal energy
minerals
solar energy
Answer:
Renewable Resources
water
wind
geothermal energy
solar energy
Nonrenewable resources
minerals
fossil fuels
Hope this helps you
Answer:
Renewable:
Wind
Geothermal energy
Solar energy
Nonrenewable:
Fossil fuels
Minerals
Water
Explanation:
This is correct, I put a picture above to show you all ^^
The Grey Cat.
Each day you take a walk at a different time following the same route. Along your path there is a bus stop with a bench located at the bottom of a hill. Upon this bench sits a grey cat. Each day, as you pass this grey cat, you say “hello cat”. You’ve recognized that each day, as you do this, a bus consistently comes over the hill. The consistency of this events sparks your interest, it seems to go beyond the possibility of coincidence. In order to satiate your curiousity you have decided to design an experiment to investigate the anomoly.
Working with just the information provided, create a GOOD Hypothesis about the above scenario. Generate an experiment to test your hypothesis, and write an experimental design. Your experimental design writeup must clearly define all essential aspects of the experiment.
Note: Avoid suppositions at all cost! Work with only the information provided. This is science.
Hypothesis: There is a synchrony between the time the bus passes over the hill, the time the cat is positioned on the bench and the time I talk to the cat.
An experiment will be established to prove or deny this hypothesis. This experiment will try to answer if there is a synchrony between the bus, the cat and me.
First, I will write down the time I usually leave the house for the bus stop and then I will look for a schedule of the buses in my city, to evaluate the times when each one passes above the hill to which I refer.
It is necessary that I clock the time spent between my home and the bus stop to which I am going, so that I can relate to the bus schedule.
I must also install a camera system at the bus stop to observe the times the cat arrives at that location.
Every day, for a month, I will write down the time I left home, the time I arrived at the bus stop, the time the cat arrived at the bus stop and the time the bus passed. At the end of this period, I will do average calculations to find out how many times our schedules have been synchronized. Through these data I will conclude whether the hypothesis is false or true.
A typical eukaryotic nucleus has to exchange a great deal of protein and nucleic acid material with the surrounding cytosol of the cell. Which choice correctly describes a feature of most nuclei that helps promote this exchange
Answer: A typical Eukaryote has an organized nucleus as well as an organized cell organelles.
The nucleus is enclosed in a nuclear envelope and the whole cell organelles are further enclosed in a plasma membrane (cell membrane).
From the question,the choice that correctly describe the feature of most nuclei that helps to promote the exchange of protein and other nucleic acids between the nucleus and the surrounding environment is the presence of nuclear pores which allows for selective movement of materials/items in and out of the nuclear space in a regulated manner.
somebody plz answer for this question
Answer:
answer d
Explanation:
We use the proportion of individuals with the recessive phenotype to calculate the frequency of the recessive allele (q). Why can't we calculate the frequency of the dominant allele in the same way, that is by using the proportion of the individuals with the dominant phenotype?
Answer and Explanation:
Due to some technical problems, the complete answer and the explanation are attached in the file named H-W
In some ecosystems, mountain lions eat deer, coyotes, and rabbits. Which of the following terms best describes these mountain lions? A. Secondary consumers. B. Producers. C. Primary consumers. D. Decomposers.
they aren't decomposes or producers
obviously we'd know that
so the remaining options are
primary and secondary consumers
these rabbits and deer, coyotes
are the primary consumers
so, this lion is the secondary consumer
which is option A
Being a predator of different carnivores makes the mountain lion a secondary purchaser as opposed to a manufacturer, or a decomposer.
What are secondary purchasers?The organisms that eat the number one customers are meat-eaters (carnivores) and are referred to as secondary consumers. The secondary customers have a tendency to be large and fewer in quantity. This continues on, all the way up to the pinnacle of the food chain.
Which animals are secondary customers?In temperate regions, as an instance, you'll discover secondary clients inclusive of puppies, cats, moles, and birds. different examples encompass foxes, owls, and snakes. Wolves, crows, and hawks are examples of secondary consumers that reap their strength from number one purchasers through scavenging.
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a cell "x" contain a cell wall large central vacuole and a nucleus at the periphery . cell"x"is __________ options 1) plants cell 2) animal cell 3) bacterial cell 4) prokaryotic cell
Answer:
Plant cell
Explanation:
Plant cells are known for having a large vaculoe to carry their water
Animal cells have their nucleus at the center
bacterial cells and prokaryotic don't contain a nucleus
What two characteristics of life are evident in viruses?
Please help me with this question
Answer:
Viruses do, however, show some characteristics of living things. They are made of proteins and glycoproteins like cells are. They contain genetic information needed to produce more viruses in the form of DNA or RNA. They evolve to adapt to their hosts.Living characteristics of viruses include the ability to reproduce – but only in living host cells – and the ability to mutate.
Hey I just got a new orchid what should I name it?
Answer:
Hope
Explanation:
It's a beautiful name
name three factors needed for germination to occur in plants
Answer:
Three factors needed for germination to occur in plants:
1 - water
2 - sunlight
3 - air
Which of the following is not a method of cell signaling?
A. Short range message molecules
B. Direct contact
C. Hormones
D. Enzymes
Answer:
C: Hormones
Explanation:
hormones do not "signal" other cells. I hope this helps :)
The correct answer is option C. Hormones.
What is the simple definition of hormones?Hormones are chemicals that act like messenger substances in the body. After being made in one part of the body, they move to other parts of the body, where they help control how cells and organs work. For example, insulin is a hormone made by the beta cells of the pancreas.
In endocrine signaling, signaling molecules (hormones) are secreted by specialized endocrine cells and transported through the circulatory system to affect target cells in remote parts of the body.
Hormones are so many essential parts of your body's system that they regulate much of what your body does. Hormones regulate growth, libido, sexual development, reproduction, sexual function, metabolism, and thirst, among other things. They simply tell the body what to do to keep it running smoothly.
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You are in your room listening to music and, realize you are thirsty, you can feel that your soda is no longer cold, and you decide to invite a friend over. What parts of the central nervous system would be primarily involved in each of these italicized behaviors
Answer:
Internal region of the brain and the hypothalamus are related to the sensation of thirst.
Thalamus is involved with the perception that the soda is not colder.
Explanation:
The central nervous system is the body system responsible for making your body receive information and respond appropriately, promoting full bodily functioning. It is formed by the brain, spinal cord and the components that form them.
Regarding the activities shown in the question above, we can say that some components of the brain are related. For example: The innermost part of the brain and the hypothalamus are related to feeling thirsty. This is because the inner part of the brain is responsible for making the brain understand how the organism is functioning, if something is missing or if there is any discomfort that needs to be resolved. The hypothalamus, in turn, is responsible for the release of hormones that signal that your body's homeostasis is unbalanced. With the interaction of these two structures you realize that you are thirsty.
In addition, the thalamus is responsible for allowing your body to receive sensory messages. It is this structure that allows you to realize that your soda is not cold when you touch the glass, or take a sip of it.
What impact does altitude have on pressure?
Answer:
As altitude increases, the amount of gas molecules in the air decreases—the air becomes less dense than air nearer to sea level.
Explanation:
Thin air exerts less pressure than air at a lower altitude.
Gastrin, histamine, endorphins, serotonin, cholecystokinin, and somatostatin are hormones or paracrines that are released directly into the lamina propria. Which of the following cell types synthesize and secrete these products?
a) parietal cells
b) enteroendocrine cells
c) mucous neck cells
d) zymogenic cells
Answer:
The correct answer is option b, that is, enteroendocrine cells.
Explanation:
The specialized cells of the pancreas and the gastrointestinal tract exhibiting endocrine function are termed as enteroendocrine cells. These cells generate gastrointestinal peptides or hormones in response to a distinct kind of stimuli and discharge them into the bloodstream for the systemic effect. These are the most varied endocrine cells found within the body.
The intestinal enteroendocrine cells produce somatostatin, cholecystokinin, motilin, enteroglucagon, and neurotensin hormones. The G cells present within the intestine produce gastrin. In the gastric glands, the gastric enteroendocrine cells are present, which produce histamine, and others like cholecystokinin, alpha and gamma-endorphin, somatostatin, and others.
In the islets of Langerhans, the pancreatic enteroendocrine cells are present, which produce hormones like ghrelin, amylin, somatostatin, and pancreatic polypeptide.
Proteins play key roles in olfaction. One kind of protein, called ___________, attaches itself to hydrophobic odorant molecules so that they may dissolve in watery mucous. A second class of proteins, to which odorant molecules become bound and initiate transduction, are coded by the largest family of genes in mammals and are called ___________ . Group of answer choices
Answer:
The correct answer is "Odorant-binding proteins (OBPs); Olfactory receptors (ORs)".
Explanation:
Odorant-binding proteins (OBPs) are low-molecular soluble molecules that are secreted in high amounts in the nasal mucus layer. The precise biological activity of OBPs remains unclear, however, its solubility and ability to attach to hydrophobic odorant molecules suggest that they acts as carriers. A second class of proteins called olfactory receptors (ORs), act at the genetic level by initiating transduction once odorant molecules attach to them. ORs are coded by the largest family of genes, which include more than 100 genes and pseudogenes that represent around 3% of the genome.
Which flowchart correctly lists the structures in order from smallest to largest?
gene Right-arrow DNA Right-arrow chromosome Right-arrow nucleus
gene Right-arrow chromosome Right-arrow DNA Right-arrow nucleus
DNA Right-arrow gene Right-arrow chromosome Right-arrow nucleus
DNA Right-arrow chromosome Right-arrow gene Right-arrow nucleus
Answer:
gene Right-arrow DNA Right-arrow chromosome Right-arrow nucleus
Explanation:
trust me I'm smart
Listing the structures in order from smallest to largest follows this sequence ( A ) ; Gene right arrow DNA right arrow Chromosome right arrow Nucleus
Gene is the basic unit of heredity in animals, they are made up of DNA strands, while chromosomes ( thread like structures ) are positioned inside the Nucleus of ( plant and animal cells ).
Chromosomes are comprised of proteins and single molecule DNA that are passed from parents to its offspring.
Hence we can conclude that the flowchart that lists the structures in order from smallest to largest follows this sequence ( A ) ; Gene right arrow DNA right arrow Chromosome right arrow Nucleus.
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