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.
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.
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 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:
_____ 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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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.
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 is associated with the reproductive system?
a the seminal vesicles
b the fallopian tubes and ovaries
Cthe production of gametes and sex hormones
d
All of the above are associated with the
reproductive system.
the movement of matter across a cell membrane against a concentration difference is called active transport and it requires
Answer:
oSMOSIS AND AQUAPORINS
Explanation:
The movement of matter across a cell membrane against a concentration difference is called active transport and it requires energy often in the form of ATP.
There are two types of transports across a cell membrane:
Passive transportActive transportPassive transports involve the movement of materials across the cell membrane from the region of higher to the region of lower concentration. It can occur by simple or facilitated diffusion and does not involve the expedition of energy in any form.
Active transport involves the movement of materials across the cell membrane from the region of lower to the region of higher concentration. It requires the expedition of energy, usually in the form of ATP.
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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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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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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
Which substances would complete the equation that
models the overall process of cellular respiration?
A:
В.
D:
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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
When working with a microscope to focus on a specimen identify one safety issue to consider when switching to a higher power objective
Answer:
The correct answer is - One should always look on the side of the microscope so they don't break the slide and use fine adjustment knob only in order to avoid damage.
Explanation:
At the point when an example is in the center at high force, there might be 1-2 millimeters of room between the high power lens and the slide. On the off chance that you check from the side and see more space than that, you are not even close to having the example in the center.
In the event that you need a particular cell in the lower power field of view to be obvious in the high power field of view, it must be in the focal point of the low force field before you switch up to high power!
One should always look on the side of the microscope so they don't break the slide and use fine adjustment knob only in order to avoid damage.
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:
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
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!
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.
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
A local recreation center has received funding to build a swimming pool. Prior to pool construction, engineers use computer models to compare which of several pool designs require the least amount of energy to be heated. What is the DEPENDENT variable in the computer models? a. pool size b. pool location c. pool shape d. pool temperature
Answer:
D. Pool temperature
Explanation:
The dependent variable in an experiment is the variable that is measured or responds to another variable called the independent variable. The outcome of the dependent variable is dependent on the independent variable.
In this computer model, the engineers compare which of several pool designs require the least amount of energy to be heated. The TEMPERATURE at which each pool design is heated is dependent on the type of pool design used. Hence, POOL TEMPERATURE is the dependent variable. It is the variable being measured in response to the type of pool design used.
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*
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.
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
What is the role of each molecule in the cell
membrane?
Answer:Phospholipids form the basic structure of a cell membrane, called the lipid bilayer. Scattered in the lipid bilayer are cholesterol molecules, which help to keep the membrane fluid consistent. Membrane proteins are important for transporting substances across the cell membrane.
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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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:
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 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
Trophic levels organize organisms by the
a
amount of energy a source provides
feeding relationships
Oc
population of organisms
Od
producers in a food web
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
