The diagram represents a food pyramid. The concentration of the pesticide DDT in individual
organisms at level D is higher than the concentration in individuals at level A because DDT is
A. produced by organisms at level C ingested by
those in level D
B. passed through levels A, B, and C to organisms
at level D.
C. excreted by organisms at level A as a toxic
waste.
D. synthesized by organisms at level D.
Answer:
The answer is "Choice b".
Explanation:
In the given question diagram is missing. so first, we define the diagram after that we explain why the above given choice is correct.
In the attached file the food pyramid can be a divide into the level, in which the D pesticides use the "dichloro-diphenyl-trichloroethane ", which concentration is higher than its entities from the level of A because DDT is transferred with species at level D by levels A, B, and C, that's why the choice "b" is correct.
Give four reasons why th toe operating system pivotal in teaching and learning
The correct answer to this open question is the following.
The four reasons why the operating system is pivotal in teaching and learning are the following.
1) Operating systems are the foundation of the computer. Without the operation system in place, you could not run any program.
2) The operating system presents an interface that allows users to perform many tasks at the same time, with all degrees of complexity.
3) The operating system permits the installation of all kinds of software so the user could work on practically anything.
4) Applications for sound, video, graphics, mathematics, and many other activities can be run due to the operating system.
In these times of digital education, the operation system of a computer allows users to do all the needed activities to fulfill the goals of teaching and learning. From video classes, team meetings, corporate dates, continuing training activities, and many more, the capacity of a good operating system is what makes it easy for you to accomplish your goals.
g dGDP is made from ________ by the ribonucleotide reductase. This enzyme is inactive when ______ is bound to its master regulatory pocket.
Answer:
1. GTP dephosphorylation
2. hydrolyzed or removed
Explanation:
GDP, (Guanosine diphosphate) is a biological term, that is made of composition including pyrophosphate group, a pentose sugar ribose, and the nucleobase guanine and it is made from GTP ( Guanosine triphosphate ) dephosphorylation by the ribonucleotide reductase. This enzyme is inactive when hydrolyzed or removed, and then eventually bound to its master regulatory pocket.
assuming hardy weinberg equilibrium what is the probability that sarah who is phenotypically normal with no family history and tom
Answer:
The probability of having a disorder is 50 %.
Explanation:
The offspring has that genetic disorder if the Sarah who is phenotypically normal with no family history and tom has a genetic disorder so there is 50 percent chance that the children of Sarah and tom has that genetic disorder. if the disorder linked with Y chromosome of male so this disorder is present in the sons but if the disorder linked with X chromosome of male so this disorder is present in the daughters.
In most organisms, the end product of glycolysis is pyruvate. Pyruvate still contains a substantial amount of energy, which can be further extracted. Whether the organisms are operating under aerobic or anaerobic conditions determines the metabolic pathway that pyruvate undergoes to produce more ATP. In this tutorial, you will identify the end products of these metabolic pathways.
Answer:
Pyruvate helps in the production of ATP.
Explanation:
The molecule of pyruvate converted into acetyl CoA. Then each molecule which is produced during glycolysis loses electron and carbondioxide releases. After the breakdown of pyruvate, the electrons loses by pyruvate are transferred to NAD+ in order to produce NADH, which will be used by the cell to produce energy molecule such as ATP. So we can say that pyruvate plays a vital role in the formation of ATP molecule.
What percentage of the nation’s demand for electricity could be produced in the future by wind energy?
Answer:
5-10%
hope this is helpful
What are some pros and cons of using a dispersant versus bacteria to deal with a very large spill and how would each one impact the environment
Answer:
it is toxic to the health
Explanation:
Dispersants create a toxic environment for fish by releasing harmful oil break-down products into the water. ... Dispersants and dispersed oil have also been shown to have toxic effects on bird eggs that are similar or worse than from untreated oil.
b) How will you describe any three (3) major components of the environment to a named
class puyil?
Answer:
Hydrosphere, atmosphere and biosphere are the three major components of the environment.
Explanation:
Hydrosphere, atmosphere and biosphere are the three major components of the environment. hydrosphere refers to water bodies such as ocean, sea, ponds and lakes etc that is present in our environment. atmosphere refers to the gaseous layer which is present above the earth surface. in this layer oxygen, nitrogen and carbondioxide etc are present. biosphere refers to all living organisms such as human, animals, plants and microbes etc which are present on earth surface..
Design a controlled experiment to test the effect of water temperature on goldfish. be sure to include your hypothesis, independent variable, dependent variable as well as experimental group and control group.
Answer:
In this experiment, indepedent variable will be temperature and dependent variable will be the respiratory rate of goldfish. Temperature affects the respiratory rate of goldfish, as it's respiratory rate decreases with decrease in temperature of water, the experiment is as follows:
Take two glass containers filled with water A and B and put one goldfish in each container.Measure the temperature of the water using a thermometer.Count mouth movement of both the fishes in certain time.Now put some ice in container B that will decrease the temperature of water and measure the temperature again.Now count the mouth movement of both the fishes for the same time it was counted earlier.The result will be that respiratory rate of goldfish decreases with the decrease in temperature in container B in comparison to container A goldfish.
An experiment meant to determine the cause of an effect, the effect is the independent variable, while the cause is the dependent variable
A controlled experiment to test the effect of water temperature on goldfish is designed as follows:
The experimental group are: The gold fish in a glass Jar X filled with fresh water and with the lid left open (the treatment of temperature reduction is applied to the experimental group)
The control group are: A second gold fish (selected at random) of the same size, in another glass jar Y filled to the same level with fresh water collected from the same source of the first gold fish
Independent variable: The independent variable is the temperature of the water which will be varied by placing ice cube gradually into the glass jar B
Dependent variable: The number times the gold fish gulp air by rising to the surface, and or the number of time goldfish opens its mouth, which indicates that the goldfish is breathing
The hypothesis: The breath rate of goldfish decreases with decrease in temperature because the goldfish metabolic rate decreases and the water holds more dissolved air and therefore oxygen at a reduced temperature
The Experiment Design:
The experiment is conducted by measuring the initial temperature and breathing rate of both fishes
The temperature of the fresh water in jar X is decreased gradually by adding ice cubes and recording the temperature and breathing rate of the goldfish
A similar experiment from an online source (Maryland School improvement website) the following results where obtained
[tex]\begin{array}{|c|cc|} \underline {Breathing \ rate}&&\underline {Water \ Temperature } \\&&\\ (Dependent \ Variable)&&(Independent \ Variable)\ \\&&\\103&&78.8 ^{\circ}F\\78&&68^{\circ}F\\55&&57.2^{\circ}F\\28&&46.4^{\circ}F\\4&&35.6^{\circ}F\end{array}\right][/tex]
From the experiment, it can be seen that the in the experimental group dependent variable, which is the breathing rate of the goldfish reduces as the temperature which is the dependent variable is reduced
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PLEASE ANSWER QUICK!The Greek roots of the word prokaryote mean “before nucleus.” Describe the way that DNA is organized in prokaryotic cells without the help of a nucleus. How does this approach differ from the way that eukaryotic cells organizes their DNA
Answer:
Prokaryotic cells' DNA are located in the cytoplasm of the cell rather than in the nucleus, like in eukaryotic cells. DNA aids in protein synthesis and determines functions of the cell in cells, regardless of being within the membrane of a nucleus or not.
-----
I hope this helps a little.
The word prokaryote in Greek means before kernel (nucleus). Unlike the eukaryotic cells, the nuclear material is located in the cytoplasm of the cell in a nucleoid.
What are the characteristics of prokaryotic cells?The prokaryotic cells are the primitive karyons that are defined by the lack of the true nucleus and organelles. Unlike the eukaryotes, the organelles lack the membrane that covers them but has a tough cell wall.
The prokaryotes include archaea and bacteria which are unicellular and microscopic organisms that are simple and have their genetic material organized into nucleoids in the center of the cell. They have the ability to live in harsh conditions.
Therefore, the eukaryotes and prokaryotes differ in the arrangement of the genetic material.
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A mutation causes a sequence of DNA that has the nucleotides TTG to be changed to TCG. The resulting protein has a different sequence of amino acids. Which type of mutation is this? a. missense b. nonsense c. silent d. frameshift
Answer:
The correct answer would be - a) missense.
Explanation:
A missense mutation is a type of a point mutation that is caused by the alteration or change in the a nucleotide of a triplet codon in a DNA sequence. This leads to a altered mRNA and incorporate different amino acid and ultimately different protein than usual.
This type of mutation can produce non functional protein by translation in most of the case and did not make any big change in the individual.
Thus, the correct answer would be - a) missense.
Answer:
A. Missense
Explanation:
edge 2020 100%
which of the following MOST directly influences a measurable outcome in an experiment?
Answer:
Hello. You did not enter the answer options, but the factor that most directly influences a measurable result in an experiment is the manipulation of the variables.
Explanation:
In an experiment, the manipulation of variables becomes highly important so that it is possible to measure, that is, evaluate the result. This is because it is the variables that express values that represent the characteristics that are being analyzed and studied within the experiment. Therefore, the manipulation between them must be done in a very rational and balanced way so as not to modify the values shown by them, changing the data and generating false or immeasurable data.
A graduate student studying biology at the University of Nebraska has identified a new species of spider found only in Eastern Nebraska around Omaha. The graduate student determines that the spider has six homologous pairs of chromosomes. How many chromosomes would a cell in that spider have during metaphase of mitosis?
Answer:
12 chromosomes
Explanation:
Mitosis is a type of cell division that involves the formation of two genetically identical daughter cells. The two daughter cells are genetically identical in the sense that they contain the same number of chromosomes as the parent cell. Mitosis involves four stages namely: Prophase, Metaphase, Anaphase and Telophase.
In the metaphase stage as stated in this question, homologous chromosomes align at the equator of the cell called cell plate, before each chromatids are pulled apart by microtubules at the Anaphase stage.
According to the question, the spider being worked on has 6 pairs of chromosomes, which will align at the cell's equator during metaphase stage of mitosis. Since the replicated chromosomes (chromatids) are yet to separate to opposite poles of the cell, the cell will still contain 12 chromosomes at the metaphase stage.
N.B: Each chromosome contains 2 chromatids or replicated chromosome, which will be separated at the Anaphase stage. Each chromatid will be an individual chromosome after cytokinesis.
Which organelle is labeled I? cell membrane ribosome endoplasmic reticulum nucleus
Answer:
"nucleus" seems to be the correct answer.
Explanation:
The nucleus seems to be a significant case wrapped through a double membrane that distinguishes these from the cytoplasm, the nuclear shell. The membranes combine throughout a few areas, allowing the interchange of substances between some of the cytoplasm as well as the nucleus, steps given designated "nuclear pores".The nuclear shell is consistent with either the concentrated endoplasmic reticulum, thereby bonding with either the nucleus.Answer:
NucleusExplanation:
What makes up the backbone of a DNA molecule? nucleic acids RNA molecules sugars and phosphates ribose and deoxyribose
Answer:
sugars and phosphates
Explanation:
gradpoint
Centrioles have pulled the chromosomes all the way to the spindle poles, the process of cleavage furrowing appears to be about to begin. What kind of a cell is this?
Answer:
An animal cell in the telophase
Explanation:
Telophase is one of the stages of cell division in animal cell .
In the animal cell during telophase, Centrioles have pulled the chromosomes all the way to the spindle poles, the process of cleavage furrowing appears to be about to begin because the nuclear membrane and nucleoli reform, cytokinesis is almost coming to completion and the chromosomes eventually uncoil to chromatin. Usually cytokinesis occurs during telophase.
Why are so many of the same genes found in almost all living organisms
Answer:
Molecular homology occurs when different species inherit similar molecules, such as nucleic acids or proteins, from an evolutionary common ancestor. In many cases, especially for essential housekeeping genes involved in protein synthesis or DNA replication, genes are homologous across most, if not all, living organisms. Hope this helps!
Explanation:
The idea that chromosomes orient themeselves randomly during metaphase I is ________________________. This leads to ___________________ combinations of genes.
Answer:
The idea that chromosomes orient themselves randomly during metaphase I is Independent Assortment. This leads to more combinations of genes.
Explanation:
During metaphase I, the pair of chromosomes align in the plate of the cell. In this step, the independent assortment takes place.
The independent assortment is the distribution of different genes into two gametes, is independent, because the distribution of the different genes, does not influence the distribution of the other genes. The independent assortment leads to new combinations of genes from the parental and maternal side, resulting in offsprings that do not look exactly like their parents.
True or dalse. The cell that produces interferon is protected from the infectious agent.
Answer:
True
I hope this helps!
What is Ependymal cell?
Answer:
Explanation: Ependymal cell is a type of neuronal support cell the forms the epithelial lining of the brain ventricles in the brain and the central canal of the spinal cord ependymal cells similar to all other neuroglia, are derived from a layer of embryonic tissue known as neuroectoderm.
Ependymal cells are ciliated-epithelial glial cells. It develops from radial glia alongside the surface of the ventricles of the brain and spinal canal.
What is the function of Ependymal cells?The main role of Ependymal cells is formation of CSF.
The CSF refers to cerebrospinal fluid. It is done by movement of sodium ion, chlorine ion and bicarbonate ion from blood to ventricles of brain.
Inside ventricles of the brain, collection of ependymal cells and capillaries together i.e., the tela choroidea form choroid plexus, which produces the CSF.
Thus, Ependymal cells are involved in formation of CSF.
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What is the relationship between DNA mutation and sickle-cell anemia? (1 point)
O Sickle-cell anemia and DNA mutations are correlated without any causal relationship.
O Sickle-cell anemia causes a DNA mutation.
O A DNA mutation causes sickle-cell anemia.
O A DNA mutation is correlated with but does not cause sickle-cell anemia.
Answer:
A DNA mutation causes sickle-cell anemia.
Explanation:
Sickle cell anemia is caused by a single code letter change in the DNA. This in turn alters one of the amino acids in the hemoglobin protein. Valine sits in the position where glutamic acid should be. The valine makes the hemoglobin molecules stick together, forming long fibers that distort the shape of the red blood cells, and this brings on an attack.
What are some of the main characteristics of skeletal muscle cells that make them distinct from the other two types of muscle cells Why are these characteristics important for understanding the function of skeletal muscle?
Answer:
They are voluntary , require force and fast.
Explanation:
Main characteristics of skeletal muscle cells are given below:
1) these muscles are voluntary which means it can be controlled by the human.
2) skeletal muscles requires force for its movement.
3) movement of skeletal muscle is fast.
Due to its structure, skeletal muscle provide support to the body and the body is able to move from one place to another. It also provide protection to the delicate organs of the body. It is also used as a storage of minerals and fats.
Explain the relationship between a thriving civilization and it’s agriculture system? In a paragraph
Answer:
They use advance technologies in agriculture.
Explanation:
There is a direct relationship between thriving civilization and it’s agriculture system because they use advance methods and technologies in agriculture instead of traditional practices. They use heavy machinery for tillage in order to save the time, use high yielding varieties, use proper dose of fertilizers, use of pesticides and weedicides in order to protect the crop. They harvest the crop by using thresher in order to avoid post harvest losses. In short, they use all technologies available to make a higher yield in order to earn more profit.
g The ____ ring is built onto ribose-5-phosphate of PRPP for its de-novo nucleotide biosynthesis, while the ring structure of the ______ bases are synthesized separately and then coupled to ribose-5-phosphate via the C-N glycosidic bond.
Answer:
The purine ring is built onto ribose-5-phosphate of PRPP for its de-novo nucleotide biosynthesis, while the ring structure of the pyrimidine bases are synthesized separately and then coupled to ribose-5-phosphate via the C-N glycosidic bond.
Explanation:
Purines are produced as bases attached to the ribose 5-phosphate (pentose sugar). The adenine and guanine nucleotides derive from inosine monophosphate (IMP), which is synthesized on an existing ribose-phosphate. Thus, purine bases are built on a ribose sugar that is directly attached to the pyrimidine ring. On the other hand, pyrimidines are produced from the carbamoyl phosphate precursor. In this case, the ribose-5-phosphate pentose sugar is attached after the pyrimidine ring is made.
Describe at least 2 benefits and 2 drawbacks there might be for animal cells (including humans) to make their own food through photosynthesis.
Answer:
Explanation:
Benefits
Animals will not depend on plant source again for their food but have it produced directly by themselves because photosynthesis will allow animal produce their own food
Animal will get a direct source of energy for their activities. Energy is derived from food consumed after the food has been broken down in the body system of animal. Animal photosynthesis will give animals access to direct source of energy as the product their food.
Demerit
Animal lacks chlorophyll the green. Pigment in plant that light hit on absorption that will enable them to photosynthesis.
Animal lacks ways or mechanism of regulating Carbondioxide in take as in the case of C4 plant and crassulacean metabolic pathway (CAM).
Animals such as human will not have access to varieties of food but stick to photosynthate produced by them.
In which of these stages is mitosis most important? A tiger cub is born. A tiger cub learns to walk. A tiger cub begins to grow. A tiger cub play-fights.
Answer:
A tiger cub begins to grow
Explanation:
because that's when they change the most
Answer:
A tiger club play fights
Explanation:
One main part of mitosis is the replacement of cells, so when the tiger gets hurt fighting, mitosis kicks in to replace the cells.
Do the spinal nerves include the sensory or motor neurons? Where do these neurons enter or exit the spinal cord?
Answer:
hd
Explanation:
The spinal nerves include the sensory or motor neurons sensory neuron → brain → motor neuron → muscles.
What are neurons?Neurons are nerve cells that are specialized to process and transmit information. The brain then processes the information obtained from the sensory neuron and sends another signal trough the motor neuron carrying the message to the muscle.
The spinal cord acts as a nerve center between the brain and the rest of our body and it contains motor neurons that transmits nerve signals from the motor cortex to the body, and the spinal cord also receives all of the sensory information from the periphery of our bodies.
Motor neurons are also known as efferent neurons, they are part of the central nervous system that transmit impulses from the brain or spinal cord to the effector organ (muscles or glands).
Therefore, The spinal nerves include the sensory or motor neurons sensory neuron → brain → motor neuron → muscles.
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Characteristics of Living Things
7. The basic unit of organization of living things is a(n)
A. atom B. organism
C. cell
D. organ
8. Storing energy obtained from food is an example of
A. evolution B. homeostasis
C. response
D. growth
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9. The passing of genes from one generation to another is
A homeostasis
B. response
C. growth D. heredity
10. The main function of reproduction is to
A. have enough male and female to reproduce
B. overpopulate
D. to be able to replace themselves.
C. grow
11. The milkweed plant feeding the caterpillar is an example of
A. interdependency.
C. preparing to die after a long life.
B. reproduction
D. heredity
12. Adaptation is very important to species because it allows them to
A. grow and become successful
C. Die
B. produce offspring better equipped to survive.
D. produce many offspring.
Answer:
bbbc
Explanation:
all of these were to long so
The process of ________ involves a carrier protein that can transport a molecule across the cell membrane down its concentration gradient.
Answer:
Answer is Facilitated diffusion.
The process of facilitated diffusion involves a carrier protein that can transport a molecule across the cell membrane down its concentration gradient.
What is facilitated diffusion?The process of spontaneous passive movement of molecules or ions across a biological membrane by particular transmembrane integral proteins is known as facilitated diffusion.
To transfer molecules from one side of the membrane to the other without consuming energy, facilitated diffusion is required. Large and charged molecules require facilitated diffusion more than smaller molecules. These compounds are unable to readily diffuse through the plasma membrane.
It happens when chemicals like glucose or amino acids flow effortlessly from a high concentration to a low concentration.
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Studies of the relative efficacy or nonefficacy of a drug based on specific genotypes would be considered part of the field of
Answer:
Personalized genomic medicine
Explanation:
Personalized genomic medicine is a field that uses genomics data to develop personalized technologies and therapies for clinical care. All people share a sequence homology level higher than 99%; however a very small fraction of the genome (lesser than 1%) contains genetic polymorphisms among individuals, and this variation is associated with the likelihood of suffering diseases, either by increasing or by reducing disease susceptibility. Personalized genomic medicine first identifies genetic variations and then develops new strategies and personalized drugs to treat genetic disorders.
