The flow of energy in an aquatic ecosystem phytoplankton → zooplankton → fish → mammal.
What does the bottom-up model?The bottom-up effect means that a lower trophic level in the biological network affects the community structure of higher trophic levels by means of resource restriction.
whereas the top-down effect refers to a higher trophic level that influences the community structure of a lower trophic level through predation.
Thus, opotion "B" is correct.
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Clostridium tetani is a bacterium that can be found in soil.
It causes the infection tetanus.
Chrildren are vaccinated against tetanus.
Explain why these children do not get tetanus if the bacteria enters their body through a cut in the skin.
Explanation:
because vaccine injected to them produces antibodies which fight against the bacteria
A specialist who treats the genitourinary system of males is a/an.
Bellwork: of the locations of earthquakes over the past 10 years were plotted on a world map, which of the following would be observed?
A. Earthquakes occur with the same frequency everywhere on Earth.
B. Earthquakes generally occur along the edges of tectonic plates.
C. Earthquakes most frequently occur near the middle of continents.
D. Earthquakes do not seem to occur in any consistent pattern.
Answer: B.
Explanation:
It's not A, because earthquakes happen at different magnitudes depending on how the plates shift beneath them.
It's not C, because tectonic plates are scattered among the earth.
It's not D, since the pattern of earthquakes are dependent on the shifts of tectonic plates.
It's B because tectonic plates are the reason earthquakes happen. Everytime they shift or move, an earthquake occurs. There may be some earthquakes that are not near tectonic plates but the majority are, which is why the question uses the word "generally occur."
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Which of the following does water pollution affect: surface water, ground Water, or ocean water?
Answer:
Pollution affects surface water, groundwater, and ocean water
Explanation:
Pollution of surface water can cause degradation of ground-water quality and conversely pollution of ground water can degrade surface water. Thus, effective land and water management requires a clear understanding of the linkages between ground water and surface water as it applies to any given hydrologic setting.
if the bars are held close to one another, why will the hanging bar move toward the held bar
Answer:
Bar 2 is made of rubber and has been rubbed with fur. If the bars are held close to one another, why will the hanging bar move toward the held bar? The bars have opposite charges. Both bars have an increase in negatively-charged particles.
15. What is atherosclerosis?
A. the build up of fats and cholesterol in the walls of blood vessels
B. the field in which scientists investigate how many people have a disease
C. a method used to correct arrhythmias
D. another word for high blood pressure
Atherosclerosis refers to the build-up of fats and cholesterol in the walls of blood vessels (Option A).
What is atherosclerosis?Atherosclerosis is a disease characterized by the build-up of fats and cholesterol in the walls of blood vessels.
This build-up of fats narrows the blood vessels, thereby difficulting the movement of blood in the bloodstream.
The symptoms of atherosclerosis include, among others, chest pain, shortness of breath and fatigue.
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Answer:
I hope this helps.
Explanation:
Why have scientist devised a system of comparative weights for atoms rather than using actual weights
Answer:
Because of multiple reasons:
Explanation:
Atoms are way too small to weigh.They couldn't use weight, they would have to use mass.Some atoms are free-floating, because they are the air.If they even made a scale that measured each atom, it would also catch the air atoms as well, unless they had a vacuum chamber, but even then, no one can make a perfect vacuum, space is not even a perfect vacuum...Hope this helps.
How does the shape of a protein relate to its function? Refer to specific details about this case and sickle cell anemia.
Answer: A protein's specific shape determines its function.
Explanation: If the three-dimensional structure of the protein is altered because of a change in the structure of the amino acids, the protein becomes denatured and does not perform its function as expected.
The cell membrane is selectively permeable, which means __________.
Answer:
Water can pass through it
Explanation:
There is no explaination. thats the answer
What causes movement of water through xylem
The network of nerves that regulate digestive motility, secretion, and blood flow is called the __________ system.
Two starts are visible from Earth ,Star A “appears” brighter than shad B , but their luminosity ( absolute magnitude ) is the same .
Why does star A appear brighter than B ?
Should we start doing genetic testing to determine if someone is a good candidate to be a firefighter, or police officer? Why or why not?
What are the horticultural advantages of producing plants by cuttings rather than from seeds? Can you think of any disadvantages?
Answer:
Propagating a plant by cuttings will allow you to keep the special characteristics of that plant. Plants grown from seed will often be different from the parent plant and from each other. Propagating a new plant via cuttings avoids the difficulties of propagating by seed.
True or false: Within a myofibril, each I band is bisected by a Z line to which the thin filaments are attached.
Answer:True
Explanation:This statement is true. Because the I band is bisected by a Z line which then anchors thin elements.
What prevents the blood in veins from flowing in the wrong direction?.
Answer:
The heart valves
Explanation:
The heart valves prevent blood from flowing in the wrong direction in the heart. The valves are held in the proper place because of the chordae tendinae.
A global mind-set is an increasingly valued _________ trait.
Answer:
task-oriented
Explanation:
A global mind-set is an increasingly valued task-oriented trait.
Answer:
A global mindset is an increasingly valued task-oriented trait.
Explanation:
A global mentality is a task-oriented attribute that is becoming more appreciated. All characteristics are either positive or bad, and excellent leaders should have only positive characteristics. The implications of leadership traits cannot be ignored.
The boy is pushing a box with force 30 N. How much force is the box pushing back with and why
Answer:
30N
Explanation:
Newton's third law states that when you apply a force onto something, it gives the same force in an equal but opposite direction.
Why doesn't a gummy bear grow as much in sugar water as it does in normal water?
Answer:
In comparison to the gelatin molecules in the candy, salt or sugar ions in water are significantly smaller. Water molecules go to a location with more solute to balance things out due to osmosis. The problem is that the water is trapped inside the candy and cannot escape. Because the Gummy Bear can't get any smaller, it keeps the same size.
PLEASE HELP ME ITS AN EMRGENCY!!!!!!
I believe the population of animals with the greatest change are the deers.
deer population in total by 21%racoon population remained the samemice population decreased by 12%opossum population decreased by 3%alligators population decreased by 6%Hope that helps!
________ is/are one of the main causes of evolution.
Mutations
Darwin
Niches
An acquired trait
Answer:
mutations
hope this helps
which are false ;-;
Answer:
an organisms phenotype is only made up of genes, the last bottom one
Explanation:
Why is less atp obtained from the average carbon in a sugar molecule than from a carbon in a fat molecule?.
Answer:
Why is less ATP obtained from the average carbon in a sugar molecule than from carbon in a fat molecule? The correct answer is not given. The sugar carbons require more water weight during cellular storage. The carbons in fatty acids are a more oxidized form of carbon than those in sugars.
What is the basic structure of a virus?
DNA or RNA surrounded by a cell wall.
O A capsid surrounded by a protein coat.
A capsid surrounded by an envelope.
DNA or RNA surrounded by a cell membrane
Answer: A capsid surrounded by an envelope.
Explanation:
Cuales son 3 biomoleculas organicas que tenga el oxigeno?
Bioelementos primarios,Bioelementos secundarios,Oligoelementos
During which phase of meiosis do the sister chromatids line up across from each other in the center of the cell?.
Answer:
Metaphase
Explanation:
During metaphase, each of the 46 chromosomes line up along the center of the cell at the metaphase plate.
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Photosynthesis ceases when leaves wilt, mainly because:.
Photosynthesis ceases when leaves wilt, mainly because stomata close, preventing CO2 from entering the leaf.
What is photosynthesis?Photosynthesis is a series of chemical reactions by which plants can produce simple carbohydrates in presence of light.
Photosynthesis requires carbon dioxide and light to produce glucose and release oxygen.
In plants, the interchange of carbon dioxide and oxygen during photosynthesis occurs in specialized structures called stomata.
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Which statement regarding viral diseases is false? AIDS was around for decades before becoming a widespread epidemic. Very few new human diseases have originated in other animals because the genetic differences are too great. RNA viruses tend to have an unusually high rate of mutation because their RNA genomes cannot be corrected by proofreading. New viral diseases often emerge when a virus infects a new host species.
The statement 'very few new human diseases have originated in other animals because the genetic differences are too great' regarding viral diseases is false.
What is a viral disease?A viral disease is an infection caused by a virus that may be spread to cause pandemic and epidemic situations.
Viruses are non-living forms and/or entities that are present in a suitable host to reproduce and survive.
In many situations, viruses mutate in order to pass from a type of host (animal) to a human host.
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What are the different systems of classification of organisms
Answer:
Kingdom, phylum, class, order, family, genus, and species.
Explanation:
The science of classifying living things is called taxonomy. Linnaeus introduced the classification system that forms the basis of modern classification. Taxa in the Linnaean system include the kingdom, phylum, class, order, family, genus, and species. Linnaeus also developed binomial nomenclature for naming species.
When the skin comes in contact with an irritant, receptors in the skin send signals to the spinal cord. The signal is then sent to the brain for processing, and the individual begins to scratch the affected area. Which two systems are most likely interacting when a person experiences itching caused by a skin irritant?.
Peripheral nervous system and Central nervous system are most likely interacting when a person experiences itching caused by a skin irritant.
What is Central nervous system?This is the control center of the nervous system and comprises of the brain and spinal cord.
The Peripheral nervous system comprises of sense organs such as the skin. The receptors in the skin sending signals to the spinal cord mean the interaction between Peripheral nervous system and Central nervous system.
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