The following organ systems are involved in the uptake and transport of materials required for life-sustaining processes: the digestive system, circulatory system, and respiratory system, which are present in the I, IV, and VI.
What is the significance of the respiratory and digestive systems?Both of these systems are important for the body, as the digestive systems help in the digestion of the food so that the energy is taken from the food, and the main role of the digestive system is the breaking down of the food. The importance of the respiratory system is that it helps remove carbon dioxide from the body.
Hence, the following organ systems are involved in the uptake and transport of materials required for life-sustaining processes: the digestive system, circulatory system, and respiratory system, which are present in the I, IV, and VI.
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A person has a sex-linked inheritable disease. Which statement is true about the set of chromosomes which are likely to carry the genes for this disease?
1-The gene is present on a single pair of chromosomes.
2-The gene is present multiple pairs of chromosomes.
3-The gene is always present on an X chromosome.
4-The gene is always present on a Y chromosome.
The statement is true about the set of chromosomes that are likely to carry the genes for this disease is the gene is present multiple pairs of chromosomes.
What is an example of autosomal?An autosomal recessive disorder needs two copies of the altered gene to compel the disease.
For example the Huntington's disease.
Thus, option "B" is correct, The gene is present multiple pairs of chromosomes.
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Answer:
b
Explanation:
(Q030) All members of the nuclear receptor family Group of answer choices are cell-surface receptors. do not undergo conformational changes. are found only in the cytoplasm. interact with signal molecules that diffuse through the plasma membrane.
Answer:
interact with signal molecules that diffuse through the plasma membrane.
Explanation:
Nuclear receptors are responsible for recognizing steroids and other molecules. They interact with signal molecules that diffuse through the plasma membrane.
What are signal molecules?Signal molecules are responsible for transmission of information. Different signaling molecules are of different size, shapes, confirmations, etc.
Its example include acetylcholine, dopamine, epinephrine, glycine, etc.
These molecules interacts with nuclear receptors and helps in signal transmission to and fro from the cell.
Thus, option d is correct.
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DNA is the genetic material that makes up living things, and folic acid plays an important role in the formation of DNA. Jon wants to study the effect of folic acid on DNA formation in microbes. Which statement accurately describe the variables in this study? A. The amount of folic acid and DNA synthesized are both dependent variables. B. The amount of folic acid and DNA synthesized are both independent variables. C. The amount of folic acid is the independent variable, and the DNA synthesized is the dependent variable. D. The amount of folic acid is the dependent variable, and the DNA synthesized is the independent variable. E. The amount of folic acid and DNA synthesized are neither dependent nor independent variables.
Answer:
The correct answer is - C. The amount of folic acid is the independent variable, and the DNA synthesized is the dependent variable.
Explanation:
DNA is the genetic material of most of the living organisms. In this question, Joe wants to study to see the effect of folic acid on the synthesis of the DNA. Folic acid ae the essential nutrients or vitamin for the synthesis of nitrogen bases of the DNA that are purines and pyrimidines. A dependent variable and an independent variable are two important part of any experiment.
A dependent variable is a variable being tested and measured. In the experiment Jon is conducting, the amount of DNA becomes a dependent variable that is being tested and measured in the presence of folic acid. And folic acid is the independent variable tested to check the formation of DNA in bacteria.
Thus, the correct answer is - C. The amount of folic acid is the independent variable, and the DNA synthesized is the dependent variable.
Answer:
The amount of folic acid is the independent variable, and the DNA synthesized is the dependent variable.
Explanation:
Edmentum
Natural killer (NK) cells __________. Natural killer (NK) cells __________. engage in immunological surveillance recognize and kill cancer cells cause abnormal cells to undergo lysis NK cells perform all of these roles.
Answer:
NK cells perform all of these roles
hope this helps
-lvr
Hydroelectric power uses water to generate what?
electricity
gasoline
fossil fuels
Answer:
The answer is option A.
ElectricityHope this helps you
Answer:
A. electricity
Explanation:
Water released from the reservoir flows through a turbine, spinning it, which in turn activates a generator to produce electricity
have a great day
Describe what might be a possible structure for this new type of membrane. Describe what might be a possible structure for this new type of membrane. This membrane would have the polar groups on the two surfaces facing the nonpolar solvent, and it would have a hydrophobic interior. This membrane would have the polar groups on the two surfaces facing the nonpolar solvent, and it would have a hydrophilic interior. This membrane would have the nonpolar groups on the two surfaces facing the nonpolar solvent, and it would have a hydrophobic interior. This membrane would have the nonpolar groups on the two surfaces facing the nonpolar solvent, and it would have a hydrophilic interior.
The question is incomplete. The complete question is as follows:
Imagine a new type of cell was discovered on Mars in an organism growing in benzene, a nonpolar liquid. The cell had a lipid bilayer made of phospholipids, but its structure was very different from that of our cell membrane.
Describe what might be a possible structure for this new type of membrane.
A. This membrane would have the polar groups on the two surfaces facing the nonpolar solvent, and it would have a hydrophobic interior.
B. This membrane would have the polar groups on the two surfaces facing the nonpolar solvent, and it would have a hydrophilic interior.
C. This membrane would have the nonpolar groups on the two surfaces facing the nonpolar solvent, and it would have a hydrophobic interior.
D. This membrane would have the nonpolar groups on the two surfaces facing the nonpolar solvent, and it would have a hydrophilic interior.
Answer:
D. This membrane would have the nonpolar groups on the two surfaces facing the nonpolar solvent, and it would have a hydrophilic interior.
Explanation:
As per the description of the membrane, the membrane is made up of phospholipid and phospholipid are consist of two hydrophobic tails (non-polar) and one hydrophillic (polar) head.
As the cell membrane is growing in a non-polar liquid, benzene, the non-polar groups or hydrophobic tails will face the nonpolar solvent, as it will repel by the hydrophillic interior and polar head will face the interior of the memebrane.
Hence, the correct answer is D.
As células são os componentes fundamentais de todos os seres vivos, não sendo encontradas apenas nos vírus. Algumas pessoas costumam dizer que as células são formadas por membrana plasmática, citoplasma e núcleo. Entretanto, nem todas as células possuem núcleo organizado, recebendo o nome de:
Answer:
Entretanto, nem todas as células possuem núcleo organizado, recebendo o nome de: células eucarióticas
Explanation:
As células eucarióticas são caracterizadas por possuir um núcleo definido, localizado no citoplasma. A diferença que tem com as células procarióticas é que o núcleo nelas está em uma região do citoplasma chamada nucleoide.
Além disso, as células eucarióticas têm um nível mais alto de complexidade em relação à sua informação genética, podendo realizar dois processos para replicar seu DNA: mitose e meiose
In order for translation to occur: Please choose the correct answer from the following choices, and then select the submit answer button. transcription must be occurring simultaneously. there must be large numbers of free amino acids present in the cytoplasm. the DNA must produce large numbers of free amino acids. replication must be occurring simultaneously. the nuclear membrane must first dissolve
Answer:
there must be large numbers of free amino acids present in the cytoplasm
Explanation:
In order for translation to occur, there must be a large number of free amino acids in the cytoplasm.
These free amino acids are usually carried by the transfer RNA which also carries the corresponding mRNA codon.
During translation, as the codons in the mRNA match their complements in the tRNA, the amino acid being carried by the tRNA is released and a peptide bond is formed between subsequent amino acids until the required polypeptide bond is formed.
Translation and transcription only occur simultaneously in prokaryotic cells where there is no barrier between the cell's genetic materials and the cytoplasm, unlike in eukaryotic cells where the genetic materials are housed in the membrane-bound nucleus.
why Reproduction is necessary for the survival of a species on this earth?
Answer:
Reproduction is vital to the success of a species. For a species to survive it must be able to produce more offspring than it loses though old age, disease, and predation.
Explanation:
Living things can reproduce in different ways – asexual reproduction and sexual reproduction.
Hope it helps.
natural selection occurs at the organizational level to
Answer:
B) population
Explanation:
Acts on phenotypes on the individual level but evolution is at the population level. Microevolution is evolution at the population level
Hope it helps you
Read the passage from “Part of the Stew.” On the morning of January 8, 1815, the Redcoats made their attack. Mama and I woke up to the sound of it. It was like thunder that rolled on and on, and we held hands as we thought of Pa and our friends. Then, suddenly, everything was silent. It felt like forever as we waited for news. Finally, word came around that the British had raised the white flag of surrender. The use of first-person point of view helps engage readers by allowing them to experience how the narrator feels about the battle. the narrator’s pa feels about the battle. the narrator’s friend feels about the battle. the narrator’s mama feels about the battle.
Answer:
how the narrator feels about the battle.
Explanation:
The first-person point of view is one of the methods used as a medium for telling the story. In this method, the story is told from the point of view of the person who is a character. All the other characters, events, and settings of the story are told from the narrator's point of view. The story is narrated by using the first person pronouns 'I' and 'we'.
In the given excerpt, the first point of view has been used for storytelling. The narrator tells about the experience he underwent on January 8, 1815. He tells about his feelings about the battle.
Answer:
a
Explanation:
step-by-step plan for dealing with a chemical splashed in your eyes.
Explanation:
go to the nearest eye wash station open ur eyes and let the water wash out the chemicals.
Which substance is used as an oxidizing agent in the chemical industries? Write its chemical name and formula.
Answer:
Hydrogen Peroxide is usually used as an oxidizing agent in the industries.
Chemical Name: Hydrogen Peroxide
Formula : [tex]H_{2}O_{2}[/tex]
Answer:
[tex]\boxed{\mathrm{H_2O_2}}[/tex]
Explanation:
Hydrogen peroxide is used as an oxidizing agent in the chemical industries.
The chemical name is Hydrogen peroxide.
Hydrogen peroxide is a chemical compound with the formula [tex]\mathrm{H_2O_2}[/tex].
in the human nervous system, what is a synapse? A. The difference in ionic charge between the inside and outside of a neuron B. the chemical signal that binds to the next call in a neuron C. A type of neuron that transmits signals from one neuron to the next D. The space between two neurons
Answer:
D
Explanation:
For more info, try specifically researching about synapse junctions
A synapse is a space between two neurons.
Where is the synapse between two neurons?The junction between the axon of one neuron and the dendrite of another, through which the two neurons communicate.
Why is there a gap between two neurons?The gap between two neurons called synapses helps in the quick transmission of impulses from one neuron to another. Other advantages of the synapse are Amplification of current flow.
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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
A critical biotic factor in Yellowstone National Park is
A. high elevation
B. high temperatures in the summer
C.population of wolves
form
D. proximity to water
Answer:
A
Explanation:
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.
what are chloroplasts? why are they green? how is the green colour plant of a great importance to the whole living world? explain?
Answer:
Chloroplasts are structures found in the cytoplasm of plant cells that are the site for photosynthesis. They are green because they contain a pigment called chlorophyll. Chlorophyll absorbs light to bring about the photosynthesis reaction. Light energy is crucial to initiate photosynthesis.
Photosynthesis allows the plant to convert carbon dioxide from air and water absorbed from the roots into oxygen and glucose, which are foods for plants. By releasing oxygen to air through photosynthesis, other living things can breathe in oxygen so that energy can be generated through another process, called respiration. Respiration is like the reverse reaction of photosynthesis, but it turns glucose to energy that supports living things.
Because plants also respire to generate energy, by using the glucose produced from photosynthesis, it also supports the food chain in the living world. Other organisms can consume plants for their energy.
In the end, chloroplasts and the chlorophyll inside are very important to the living world.
What are digestive enzymes? Give three examples of digestive enzymes and briefly describe their specific functions.
Answer:
Digestive enzymes are the natural substances our body needs to help break down and digest food
We have three main digestive enzymes :
Proteases: These enzymes break down protein into small peptides and amino acids.
Lipases: break down fat into three fatty acids plus a glycerol molecule.
Amylases: Are responsible for breaking down carbs like starch into simple sugars.
Explanation:
Digestive enzymes are proteins that catalyze mainly hydrolysis reactions that make nutrients absorbable in the digestive tract. Pepsin is a gastric enzyme that turns proteins into albumoses and peptones which are shorter peptide chains that are then hydrolyzed to even shorter chains until amino acids by intestinal enzymes. Pancreatic amylase is an enzyme that turns starch(a polysaccharide) into maltose(a disaccharide). Lipase is present in the gastric juice, the pancreatic juice, and the intestinal juice. This enzyme catalyzes the hydrolysis of lipids(mainly triglycerides) into fatty acids and glycerol. When incomplete hydrolysis occurs triglycerides can become monoglycerides.
A storm brings two formerly separated populations of beetles together. They look very similar. Under the biological species concept, which of the following would show that the two populations are different species?
A. One population breeds in spring, the other in fall.
B. Males of the two populations have different flight patterns in courtship.
C. When individuals from the two populations mate with each other in the laboratory, the eggs fail to hatch.
D. All of the above is correct.
E. None of the above is correct.
Answer:
The correct option is D: All of the above is correct.
Explanation:
The biological species concept says that species are population groups that, in a real or potential way, can reproduce among each other and that are reproductively isolated from other groups.
Individuals belonging to a species cannot mate with members of other species, and if they do there is not any reproductive success.
The mechanisms of reproductive isolation might be divided in prezygotic and postzygotic.
Prezygotic or Premating mechanisms:
Ecological or due to habitat isolationSeasonal or temporal. This is the case described in option A "One population breeds in spring, the other in fall". These species are reproductively isolated because they differ in their breeding season.Sexual or ethological. This is the case described in option B "Males of the two populations have different flight patterns in courtship". Males belonging to each species behave differently during courtship. MechanicalGametes incompatibilityZygotic or Postmating Mechanisms:
Hybrid inviability. This is the case described in option C which states that "When individuals from the two populations mate with each other in the laboratory, the eggs fail to hatch". Eggs fail to hatch because the zygote is inviable. Hybrid sterilityHybrid decreased fertilityA 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.
The last few miles of the marathon are the most difficult for Heather. Her hair is plastered to her head, sweat clings to her arms, and her legs feel as if they had nothing left. Heather grabs a cup of ice water. The ice cubes smash against her nose as she gulps some cool refreshment and keeps on running. Then a breeze kicks up and she finally feels some coolness against her skin. Drops of sweat, once clinging to her forehead, now spill down, and Heather feels a stinging as the sweat flows into her eyes.Sweat on Heather’s forehead and arms formed drops because of the ______.
Answer:
heat.
Explanation:
Answer:
Hello! I am sorry I am late.
The answer is heat.
Explanation:
Hope this answer helped you. Have a great day or night! Good luck on your work!
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Which explanation provides support for continental drift theory? O Dinosaurs lived on many continents. Coal fields match up across continents. Tropical plant fossils were found in warm areas. Similar rock types are found across continents.
Answer:
Similar rock types are found across continents
Explanation:
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Similar composition of rocks are present across continents that support the theory of continental drift.
Similar rock types are found across continents is the evidence that support the continental drift theory because at the boundaries of two continent there must be similar type of rock present. Scientist Alfred Wegener presented Continental drift theory in the early 20th century.
Wegener noticed similarities between two continents when he pieced together maps of Africa and South America. He noticed that mountain ranges present on both continents line up to each other which means they are made of similar type of rock so we can conclude that similar types of rock are present across continents.
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Collections of lymphoid tissues, called MALT, are strategically placed throughout the respiratory, digestive, and genitourinary systems. Which one of these is located at the end of the small intestine?
a) appendix
b) Peyer's patches
c) tonsils
The graphic shows the citric acid cycle. A diagram of the citric acid cycle is shown. Acetyl C o A enters the citric acid cycle and combines with a 4-carbon compound to form citric acid. During the citric acid cycle, what happens to acetyl-CoA? It enters the citric acid cycle and gains carbon dioxide to form citric acid, and gains more carbon dioxide through redox reactions to form a 4-carbon molecule. It enters the citric acid cycle and associates with a 4-carbon molecule, forming citric acid, and then through redox reactions regenerates the 4-carbon molecule. It enters glycolysis and associates with a 5-carbon molecule through redox reactions, forming another acetyl-CoA molecule. It enters the citric acid cycle and associates with a 4-carbon molecule, forming a 5-carbon compound, and then through oxidation reactions regenerates the 4-carbon molecule.
Answer:
It enters the citric acid cycle and associates with a 4-carbon molecule, forming citric acid, and then through redox reactions regenerates the 4-carbon molecule.
Explanation:
Acetyl-CoA(2C) associates with oxalacetate(4C) to form citric acid(6C). Then through redox reactions, CO2 molecules result from decarboxylation (COOH becomes R-(R1)CH-R2). And through dehydrogenation H2 molecules are incorporated in NADH+ in FADH2, resulting in the 4-carbon molecule at the beginning (oxalacetate). That's why it's called a cycle(Kreb's cycle or citric acid cycle)
In the citric acid cycle, when acetyl-CoA enters the cycle, it associates with a 4-carbon molecule (Oxalacetate), forming citric acid, and then through redox reactions regenerates the 4-carbon molecule (Oxalacetate).
--------------------
The resumed steps of the Citric acid cycle are as follows,
1) Acetyl CoA joins an oxaloacetate molecule, which is a 4C molecule. They release the CoA group and form a 6C molecule called Citrate.
Acetil CoA + Oxalacetato → Citrato + CoA group
2) Citrate turns into an isomere Isocitrate
3) Isocitrate oxidates and release 1 CO₂ molecule, producing an α- ketoglutarate molecule -this is a 5C molecule-. Meanwhile, NAD+ reduces to NADH.
Isocitrate + NAD+ → α-cetoglutarate + CO₂ + NADH
4) α-ketoglutarate oxidates and release 1 CO₂ molecule, producing a 4C molecule, which joins a Coenzyme A producing Succinyl-CoA. Meanwhile, NAD+ reduces to NADH.
α-cetoglutarate + NAD+ → 4C molecule + CO₂ + NADH
4C molecule + Coenzyme A → Succinil-CoA
5) CoA from Succinyl-CoA is substituted with a phosphate group, which then forms ATP. The final product is Succinate and ATP
Succinyl-CoA + Phosphate group + ADP → Succinate + ATP + CoA
6) Succinate oxidizes and forms Fumarate, a 4C molecule. FAD+ forms FAH₂
Succinate + FAD+ → Fumarate + FADH₂
7) A water molecule and Fumarate produce Malate, which is another 4C molecule
Fumarate + H₂O → Malate
8) Finally, malate oxidizes and oxalacetate regenerates -the initial 4C compound-. NAD+ reduces to NADH.
Malato + NAD+ → Oxalacetate + NADH
So, when acetyl-CoA enters the cycle, it associates with a 4-carbon molecule (Oxalacetate), forming citric acid, and then through redox reactions regenerates the 4-carbon molecule (Oxalacetate).
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Which of the following biological macromolecules is correctly paired with one of its functions?
Choose ONE answer:
A. Proteins ----> provide cell structure
B. Carbohydrates ----> store genetic information
C. Nucleic acids ----> digest dead cells
D. Lipids ----> give quick energy to cells
Of the given options, proteins is correctly paired with its function, that is, provide cell structure.
What are proteins and their functions?They are the large and complex molecules, which perform many essential roles in the body. They perform majority of the function in cells and are needed for the structure and function of the cells. Apart from this, they also play an essential role in the regulation of the tissues and organs of the body.
Of the different kinds of proteins found in the body, the structural proteins provide structure and support for the cells. On a bigger scale, they also help the body in movement, for example, actin protein.
Thus, the correct answer is option A.
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Which statement about DNA is false? It can be used to identify an individual person. It is found in nearly all the cells of all living things. It can be found in human saliva, hair, and blood. Plants have DNA in three places: the nucleus, chloroplasts, and mitochondria. Humans lack DNA in their brain cells.
Answer:
Humans lack DNA in their brain cells.
Explanation: