Answer:
Energy and the source applied
:
Trophic levels are a way of organizing organisms in an ecosystem based on their feeding relationships. The correct option is b.
The trophic levels represent the different levels of energy transfer and nutrient flow within a food chain or food web.
Organisms within an ecosystem are classified into different trophic levels based on their position in the food chain.
1. At the base of the trophic pyramid are the producers, also known as autotrophs. These are typically green plants, algae, and some bacteria that are capable of converting sunlight into chemical energy through photosynthesis.
2. The next trophic level consists of the primary consumers, also known as herbivores. These are organisms that directly feed on the producers. Examples of primary consumers include rabbits, deer, and grasshoppers.
3. The next level is occupied by secondary consumers, which are carnivores or omnivores that feed on the primary consumers. Examples of secondary consumers include snakes, birds, and frogs.
4. Tertiary consumers occupy the next level and are carnivores that feed on other carnivores. They are often at the top of the food chain. Examples include large predators like lions, sharks, and eagles.
Thus, the correct option is b.
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Complete question:
Trophic levels organize organisms by the
a. amount of energy a source provides
b. feeding relationships
c. population of organisms
d. producers in a food web
Which of the following is NOT an oxidation reaction?
a. Reaction 6 of glycolysis (glyceraldehyde 3-phosphate <--> 1,3 Bisphosphoglycerate)
b. Reaction 4 of the citric acid cycle.(alpha-ketoglutarate <--> succinyl CoA
c. Reaction 3 of the citric acid cycle.(Isocitrate <--> alpha-ketoglutarate)
d. Reaction 7 of the citric acid cycle.Fumarate <--> Malate)
e. Reaction 5 of the PDH complex (E2-dihydrolipoamide acid <--> E2-lipoamide)
Answer:
d. Reaction 7 of the citric acid cycle.Fumarate <--> Malate)
Explanation:
N oxidation reaction is one that involves the removal of electrons or hydrogen atoms or the addition of oxygen; whereas a reduction reaction involves the addition of electrons or hydrogen atoms or the removal of oxygen.
Considering the given option below:
a. Reaction 6 of glycolysis (glyceraldehyde 3-phosphate <--> 1,3 Bisphosphoglycerate) is an oxidation reaction involving the addition of an oyyegen atom in the form of a phosphate to C-1 of glyceraldehyde-3--phosphate to form 1,3-bisphosphoglycerate
b. Reaction 4 of the citric acid cycle (alpha-ketoglutarate <--> succinyl CoA
) is an oxidation reaction in which NAD⁺ sreves as an electron acceptor (removing a hydrogen atom as a hydride) in the decarboxylation of alpha-ketoglutarate to form succinyl CoA and CO₂
c. Reaction 3 of the citric acid cycle (Isocitrate <--> alpha-ketoglutarate) is an oxidation reaction in which isocitrate is oxidized to alpha-ketoglutarate by hydride transfer to NAD⁺ or NADP⁺.
d. Reaction 7 of the citric acid cycle.Fumarate <--> Malate) is a hydration reaction in which fumarate is hydrated (water is added in the form of OH⁻ and H⁺) to malate.
e. Reaction 5 of the PDH complex (E2-dihydrolipoamide acid <--> E2-lipoamide) is an oxidation reaction involving the removal of electrons in the form of hydride ions which are transferred to FAD from E2-dihydrolipoamide acid to form E2-lipoamide.
what does soil come from
Answer:
weathering of rocks. It is made up mainly of mineral particles, organic materials, air, water and living organisms—all of which interact slowly yet constantly.
Explanation:
Answer:
weathered rocks
Explanation:
"It is made up mainly of mineral particles, organic materials, air, water and living organisms."
Hope this helps!
What was the first instrument used to observe MICROSCOPIC objects?
(will mark BRAINLIEST)
help would be extremely appreciated
A. Glass lenses
B. Light microscope
C. Magnifying glass
Answer:
b
Explanation:
What is role of science in the field of medicine and agriculture?
What could happen if scientists did not compare results ?
Answer:
Hmm.
Explanation:
Publishing results of research projects in peer-reviewed journals enable the scientific and medical community to evaluate the findings themselves. It also provides instructions so that other researchers can repeat the experiment or build on it to verify and confirm the results.
TL; DR, Basically to confirm the results.
In the scientific method, what precedes (occurs before) the formation of the
hypothesis
Answer:
Ask a question before the hypothesis
In the scientific method, what precedes the formation of the hypothesis would be observation.
The scientific method refers to the chronological order of activities that must be carried out in order to come to scientifically acceptable conclusions about the natural world. The steps in the scientific method include:
ObservationFormation of hypothesis based on what has been observedTesting of hypothesis using experimentsArriving at logical conclusions based on the findings from the experimentHence, what precedes the formation of hypothesis as far as the scientific method is concerned is observation.
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Solution A and solution B are separated by a selectively permeable membrane. Solution A is hypertonic with respect to solution B. Which of the statements below does not agree with this information?
A. solution B has a higher water potential than solution A
B. water will tend to move from solution B to solution A through the membrane
C. Solution A has more solute than solution B
D. Solute wants to move from solution B into solution A, but is stopped by the membrane.
Answer:
D.
Explanation:
When a solution is hyper tonic,it means that it has higher concentration than the surrounding environment.Therefore more solute should be preset in it with less water molecules.Such a solution is said to be of higher solute potential,but low water potential. This is the state of A in the question.
The surrounding environment of lower concentrations should contain less solute more more water,and therefore said to be hypo tonic to A and thus higher water potential.
Hence,based on the concept of osmosis,water tends to move from higher water concentration from B to A, and not the movement of solutes from A,because,A is of less water potential ,therefore no solution to move the solute across the semi permeable membrane to the B.
Which of the following scenarios is a
velocity?
A. A car drives 20 kph southwest.
B. An airplane flies at 200 mph.
C. A boat moves through the water at 20 mph.
D. A bike moves at 7 m/s.
Answer:
D. A biek moves at 7 m/s
Explanation:
This is the answer because the unit for velocity is ALWAYS distance divded by time.
Kesav used to grow pea plant in his field after the harvesting of paddy. What do you think the advantage of this type of cropping
Kesav will Planting nitrogen-fixing crops, such as peas, in rotation with wheat crops can dramatically reduce the variability of farmers' income with a high-yield, high-protein harvest. ... Instead, they depend on the presence of nitrogen as ammonium or nitrate ions in the soil.
Energy in Foods Use the chart at the right you help you answer the following question. Suppose you were getting ready for a soccer game and wanted to have a snack that would give you energy for the entire game. Which snack should you eat: a container of yogurt with some cheese (both high in fat) or hard candy with soda pop (both high in glucose)? Why?
Answer:
Yogurt and cheese.
Explanation:
Hard candy and carbonated drinks aren't useful in any situation that involves hard physical movements.
During DNA replication, the covalent bonding of nucleotides into a new strand of DNA is performed by __________. During DNA replication, the covalent bonding of nucleotides into a new strand of DNA is performed by __________. DNA polymerase DNA ligase RNA polymerase primase
Answer:
DNA polymerase
Explanation:
During DNA replication, the covalent bonding of nucleotides into a new strand of DNA is performed by *DNA polymerase*
The following data represents cellular concentrations of ATP, ADP, and inorganic phosphate from various mammalian organs. Calculate the actual Gibbs free energy change for hydrolysis of ATP under physiological conditions (assume 37oC). Assume ATP hydrolysis has a standard free energy change of -30.5 kJ/mol. Which cell type yields the greatest free energy change for ATP hydrolysis
Answer:
The liver cell with ∆G'° = -2.34 kJ/mol
Note: The question is incomplete. The complete question is given below:
The following data represents cellular concentrations of ATP, ADP, and inorganic phosphate from various mammalian organs. Calculate the actual Gibbs free energy change for hydrolysis of ATP under physiological conditions (assume 37°C). Assume ATP hydrolysis has a standard free energy change of -30.5 kJ/mol. Which cell type yields the greatest free energy change for ATP hydrolysis? Show your work. ATP (MM) ADP (mm) Pi. (mm) Liver 3.5 1.8 5.0 Muscle 8.0 0.9 8.0 Brain 2.6 0.7 2.7 mM=millimolar, ATP=adenosine triphosphate, ADP-adenosine diphosphate, Pi=inorganic phosphate
Explanation:
The equation for ATP hydrolysis is as follows: ATP ---> ADP + Pi
Standard free energy change, ∆G'° = -RTlnK'eq;
where K'eq is equilibrium constant; R = 8.315 J/mol.K; T = 298 K
K'eq = {[ADP][Pi]}/[ATP]
For Liver:
∆G'° = -(8.315)(298) × ln (1.8 × 5.0/3.5)
∆G'° = -2.34 kJ/mol
For Muscle
∆G'° = -(8.315)(298) × ln (0.9 × 8.0/8.0)
∆G'° = 0.261 kJ/mol
For Brain
∆G'° = -(8.315)(298) × ln (0.7 × 2.7/2.6)
∆G'° = 0.79 kJ/mol
Why are nitrogen-fixing bacteria important?
Answer:
Most organisms cannot obtain nitrogen from the atmosphere. Nitrogen fixing bacteria take Nitrogen out of the atmosphere and make it available for consumption by the other organisms, This is important because Nitrogen is an essential building block of life.
Which expression correctly describes energy using SI units? A. 1 J=1kg•m^2/s^2 B. 1 J= 1kg•m/s^2 C. 1 J= 1kg• m/s D. 1 J= 1kg•m^2/s
Answer:
A. 1 J= 1 kg•m²/s²
Explanation:
Energy is defined as the ability to work. The unit of energy is Joules. Work is said to be done if a force applied to an object cause the object to move through a distance.
Work = Force × Distance
Since force = mass × acceleration
Work = mass × acceleration × distance
Using the unit of each quantity to get the unit of work which is Joules
SI Unit of mass is kilogram (kg)
SI Unit of acceleration is metre per second square (m/s²)
SI Unit of distance is meters(m)
SI unit of work = kg × m/s² × m
SI unit of work = kgm²/s²
Hence 1J is also equivalent to 1kgm²/s²
A man who has an X-linked dominant allele will pass it on to:_______.
A) All of his daughters
B) Half of his sons
C) All of his sons
D) Half of his daughters
Answer:
C)all of his sonsAsk for further explanations
Some molecules found in foods are known to be capable of driving DNA methylation or DNA demethylation. For example, folic acid (a vitamin), vitamin B12, and choline are thought to increase methylation. Based on this consideration, why would it be important to avoid eating excessive quantities of such molecules (while being certain to eat sufficient quantities for health)
Answer: Eating excessive quantities of such molecules could deregulate this process, increasing methylation and repressing the expression of genes that should normally be expressed.
Explanation:
DNA methylation is one of the epigenetic mechanisms involved in the regulation of gene expression, because it is a process by which methyl groups are added to DNA.
Methylation then modifies the function of DNA when it is found in the promoter gene, it is essential for normal development and is associated with a number of key processes, including genomic imprinting, inactivation of the X chromosome, repression of repeating elements, aging, and carcinogenesis. Usually, it acts to suppress gene transcription.
For example, folic acid is essential for the rapid cell division that occurs during early fetal development and it also plays an important role in methylation and thus in gene regulation. The metabolism of these vitamins is aimed at achieving adequate levels of DNA methylation, necessary for the cellular processes. Eating excessive quantities of such molecules could deregulate this process, increasing methylation and repressing the expression of genes that should normally be expressed.
100 POINTS!!! ANSWER ASAP [5 SENTENCE ANSWER] Explain the relationship among distance, mass and gravitational force between any 2 objects. Use a diagram to help you explain.
Answer:
Gravitational force -an attractive force that exists between all objects with mass; an object with mass attracts another object with mass; the magnitude of the force is directly proportional to the masses of the two objects and inversely proportional to the square of the distance between the two objects.
Explanation:
The diagram below shows the skeletal forearms of different species. Although the functions are different what evidence of evolution is depicted?
Answer:
Due to the presence of different structure of forearms.
Explanation:
The evidence of evolution is depicted in the diagram due to the presence of different forearms of different organisms. The ancestor of all organisms are the same, but due to change in the environment changes occurs in the body structure of organism especially in the skeletal structure. This change in the structure requires millions of year to occur so that's why different organisms have different skeletal forearms.
Calculate: If each kind of tree has 163 species of beetles that are found only on that type of tree but no others, how many species of beetles are there in all tropical trees? Use a calculator to do the calculations.
Assuming there are 50,000 tropical trees of that type, by performing a three simple rule, we can estimate an approximate number of 8,150,000 beetle species in all tropical trees.
To answer this question you need to have data about the total number of tropical trees and the number of beetle species found in one single tree.
We already know that each tree has 163 species of beetles.Now, we will assume that the total number of this type of trees is 50,000 (note: you should do the calcs with the total number of trees that were provided to you)All we need to do is to perform a three simple rule, this is,
If in one single tree there are 163 species of beetles, how many beetles there are in 50,000 of these tropical trees?
1 tree ------------------ 163 beetle species
50,000 trees ------X = (50,000 trees x 163 species) / 1 tree = 8,150,000
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What’s wrong with this statement
Keshia started the lab activity before reading it through completely.
Answer:
keyshia has to first wait for the teachers then read it all the way through
Science cannot answer all questions.
a
The above statement is true because science
cannot answer matters of belief
b
The above statement is true because science is
based on logic
The above statement is false because science can
prove that life evolves over time.
С
d
The above statement is false because science is
based on observation and evidence.
I believe awnser B it's TRUE because science is based on logic
Which is the best definition of inertia?
A. a change in distance over time
B. tendency of an object to resist a change in motion
C. a change in speed over time
Which is one of the 6 fundimental elements that are found in living organisms? Helium Sodium Oxygen Chlorine
Answer:
Oxygen
Explanation:
Although more than 25 types of elements can be found in biomolecules, six elements are most common. These are called the CHNOPS elements; the letters stand for the chemical abbreviations of carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur.
Your welcome
The study of the form or structure of all living things
Answer:
The study of the form or structure of all living things is anatomy.
The study of form and structure of an living organisms is called anatomy.
Anatomy is a branch of science that deals with the form and structure of a living organisms. Anatomy includes external appearance as well as its internal parts. The study of anatomy started more than 2,000 years ago in the Ancient Greeks.
There are two main types of anatomy i.e. gross anatomy, and microscopic anatomy. The study of form and structure is known as anatomy so it is concluded that anatomy is the study of form and structure of an living organism.
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The liver is an example of organ of the digestive system. Which of the following statements describes the general function of this type of digestive organ? Secretes enzymes and other liquids that aid in the digestion and processing of food Physically interacts with the ingested food, for example, storing the food, moving the food along the digestive tract, or absorbing nutrients released from processed food
Answer:
Secretes enzymes and other liquids that aid in the digestion and processing of food
Explanation:
The liver is a large organ in the body, if not the largest. It possess a red-purple color and constitutes a part of the digestive system. The liver carry out many functions in the human body; inclusive of digestive function. Although it is not a main digestive organ.
During digestion, the liver is responsible for processing of absorbed nutrients by releasing certain hormones and chemicals like bile, which aids in digestion of fat. This is the reason the liver is considered a "gland"
Which substances would complete the equation that
models the overall process of cellular respiration?
A:
В.
D:
>
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Describe what all living things must have for the next generation to be created. It is NOT
reproduction but is linked to it.
Answer: Characteristics that are not seen may be carried in genetic information ... All plants and animals are made up of cells where the genetic material ... genetic makeup of an organism and can be passed on to the next generation. ... Genetic material provides the information that allows living things to function.
Explanation:
_____ and _____ are explanations accepted by scientists
Biology
Hypothesis
Gravitrons
Scientific Laws
Theories
Answer:
Biology and Theories
Explanation:
Its in my science book
In science, the testable and experimented information is accepted. Scientific Laws and theories are explanations accepted by scientists. Thus, options d and e are correct.
What are scientific laws and theories?Scientific laws are considered true and are said to be the principle that arrives from facts and is derived from experimental observations. They are statements that are used to predict the phenomenon of natural sciences.
They are formulated mathematically from the known knowledge and events of the occurrences. It is an important part of science that explains the relationships and interdependencies of the various factors and parameters. For example, conservation of mass is the law.
Theories, on the other hand, are structured explanation that uses scientific laws and hypothesis to test the reliability of the experiment and its conclusions. It uses the scientific method to test and verify whether the result is true or false. The kinetic theory of matter is a theory.
Therefore, options d and e. scientific laws and theories are the correct blanks.
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Becca wants to answer the following scientific question.
"On average, how far do female sea turtles crawl up beaches when making their nests?"
What type of scientific investigation should Becca perform to accurately answer the question with direct observations?
A.
She should make a model using toy sea turtles and an aquarium.
B.
She should read about female sea turtles in a book.
C.
She should create an artificial environment with sand and a swimming pool.
D.
She should observe female sea turtles making nests in their natural habitats.
Read the quotation below from a high school science student. We used a formal method of study to figure out which kind of grocery bag had the least effect on the environment What is the student describing? A. Using scientific tools B. Using the scientific method C. Making a conclusion D. Making random discoveries
Answer:
your answer is Using the scientific method
Explanation:
apex
