what was the 3rd agricultural revolution? group of answer choices machinary iot genetics and genomics chemicals

Plants and animals contribute to small changes in the amount of oxygen in Earth's atmosphere through the processes of photosynthesis and respiration.

Photosynthesis is the process by which plants use sunlight to convert carbon dioxide and water into oxygen and sugar. This process is responsible for producing most of the oxygen in Earth's atmosphere.

Respiration is the process by which animals and other organisms use oxygen to break down food and produce energy. This process consumes oxygen from the atmosphere.

The balance between photosynthesis and respiration determines the amount of oxygen in Earth's atmosphere. When there is more photosynthesis than respiration, the amount of oxygen in the atmosphere increases. When there is more respiration than photosynthesis, the amount of oxygen in the atmosphere decreases.

The small changes in oxygen levels that have been observed over time are likely due to changes in the balance between photosynthesis and respiration. For example, during periods of increased plant growth, there is more photosynthesis, which leads to an increase in the amount of oxygen in the atmosphere. During periods of increased animal activity, there is more respiration, which leads to a decrease in the amount of oxygen in the atmosphere.

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Answer:

lkhxltxlu

Explanation:

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bc jlgxyltc h h h h h j huh. bdhvdnrkbd. dj d d be dbd dbd dj den d n n b hdkdb dk

Answer:

Uracil

Explanation:

In RNA Adenine pairs with Uracil

In DNA Adenine pairs with Thymine

Thymine dos not exist in RNA

Hope this helps ^^

Adenine in DNA pairs with uracil in RNA. Therefore option “D” is correct.

There are five types of the nucleotide bases adenine, cytosine, guanine, thymidine, and uracil. These divide into two classes of nucleotides pyrimidine and purine nucleotide bases.  Pyrimidines are uracil, thymine, and cytosine whereas adenine and guanine are purines.

DNA consists of adenine, cytosine, guanine, and thymidine. In RNA, adenine, cytosine, and guanine are present but thymine is replaced by uracil.

Pyrimidine always binds with the purines through hydrogen bonding. Adenine binds with thymine. Cytosine binds with guanine. But when adenine pairs with uracil in RNA.

Nucleotide base pairing is important for the stability of the DNA.

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Vestigial structures are anatomical structures in organisms that have lost or greatly reduced their original function in the course of evolution. These structures were functional in ancestral species but have become unnecessary or non-functional in the present species.

Vestigial structures are considered remnants of traits that were once important in the evolutionary history of a species but are no longer needed. Examples of vestigial structures in humans include the appendix, which appears to have a minimal role in digestion; the coccyx or tailbone, which is a remnant of a tail present in some ancestral species; and the wisdom teeth, which often lack sufficient space in the human jaw and are prone to complications. The presence of vestigial structures supports the idea of common ancestry and evolutionary change over time. It suggests that organisms have undergone modifications and adaptations throughout their evolutionary history, resulting in the retention of some structures that have lost their original functions.

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Answer:

The branch root originates at the pericycle of the parent root, just outside the parent root's primary xylem.

Explanation:

Answer: The answer is D

Explanation:

The statement which is true about the structure of organic molecules is as follows:

Thus, the correct option for this question is D.

Organic molecules may be defined as those molecules that are correspondingly made of carbon and hydrogen. It can also include other elements like oxygen, sulfur, nitrogen, etc. It must contain carbon atoms covalently bonded to hydrogen atoms (C-H bonds).

DNA possesses monomeric units known as nucleotides. Lipids are the derivatives of fatty acids. While proteins are composed of building blocks that are known as amino acids.

On the other hand, carbohydrates are derived from monosaccharide units that are togetherly held by glycosidic linkage.

Therefore, carbohydrates contain monosaccharide units is a statement that is true about the structure of organic molecules. Thus, the correct option for this question is D.

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In cellular DNA replication, the primers are made of RNA, and in polymerase chain reaction, the primers are made of DNA.

DNA replication is the process of producing two similar copies of DNA from one original DNA molecule. DNA replication is a biological process that occurs in all living organisms, allowing them to produce offspring that have DNA matching their parents. DNA replication takes place in cells during the cell cycle, the time between cell divisions, as the cells are about to divide.

Polymerase Chain Reaction (PCR) is a technique used in molecular biology to create millions of copies of a specific DNA sequence. PCR is based on three essential steps: denaturation, annealing, and extension. PCR is an efficient and precise way of amplifying a specific DNA sequence from a small amount of DNA or a complex mixture of DNA. It is used in many fields, such as research, forensic science, medical diagnosis, and biotechnology.

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Answer:

Plant cells have a cell wall, but animals cells do not.

Plant cells have chloroplasts, but animal cells do not.

Plant cells usually have one or more large vacuole(s), while animal cells have smaller vacuoles, if any are present.

Explanation:

A plant cell contains a large, singular vacuole that is used for storage and maintaining the shape of the cell. In contrast, animal cells have many, smaller vacuoles. ... Animal cells simply have a cell membrane, but no cell wall.

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Answer:

OLM alpha 2 cells would be the answer.

Cells that act as gatekeepers that permit materials to pass to the neurons of the brain from the capillaries are called astrocytes.

Astrocytes are specialized glial cells that exceeds the number neurons by a factor of more than five.

They tile the entire central nervous system and perform a variety of essential complex functions in a healthy central nervous system.

Astrocytes not only control blood flow, but they also transport mitochondria to neurons and provide the building blocks for neurotransmitters, which fuel neuronal metabolism.

Furthermore, astrocytes have the ability to phagocytoze synapses, alter neurotrophin secretion, and clear debris.

Astrocytes can produce a strong antioxidant response to protect themselves and neurons by releasing glutathione precursors to neurons.

Because of their role in scar formation, astrocytes can regulate and contain immune responses, thereby controlling neuroinflammation.

Thus, the answer is astrocytes.

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Answer:

Hypothesis - In the sciences, a provisional supposition from which to draw conclusions that shall be in accordance with known facts, and which serves as a starting point for further investigation. Prediction - The action of predicting future events; an instance of this, a prophecy, a forecast.

Calcium is released and sequestered differently in skeletal and cardiac muscles, this difference is due to the specific properties of the muscle fibers of each muscle.

In skeletal muscle, calcium is released from the sarcoplasmic reticulum (SR) into the cytoplasm in response to an action potential. In cardiac muscle, calcium is released from the SR and also from the extracellular space. This difference in calcium handling is physiologically relevant because in cardiac muscle, calcium ions play a key role in the contraction and relaxation of cardiac muscle fibers. Calcium ions bind to the protein troponin, which then triggers a series of events that result in muscle contraction. The cardiac muscle fibers are able to release calcium ions from the SR and extracellular space, this allows for a more rapid and sustained contraction of the cardiac muscle, which is necessary for the efficient pumping of the blood throughout the body.

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Answer:

Cheetahs and lions

Explanation:

They feed on the same prey. Therefore, if they live in the same area, one or both species will have less food. You might expect them to fight each other over food, but they do not.

Answer:

Cheetah And Lions can you mark me Brainlest?

Answer:

Decreases the necessary activation energy to speed up the chemical reaction.

Explanation:

This picture shows substrates binding to the activation site of an enzyme causing the enzyme to change shape and therfore speeds up the chemical reaction.  

Answer:

Population control may involve culling, translocation, or manipulation of the reproductive capability

Answer:

Population control may involve culling, translocation, or manipulation of the reproductive capability

Explanation:

Double fertilization refers to the situation in which a sperm is fused with the egg to form the embryo and another sperm combines with the polar nucleus to yield the endosperm.

Hence, the term double fertilization refers to the situation in which a sperm is fused with the egg to form the embryo and another sperm combines with the polar nucleus to yield the endosperm.

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The type of horizontal transfer that involves the transfer of DNA via a virus is called transduction.

Transduction is a mechanism of horizontal gene transfer in which bacterial DNA is transferred from one bacterium to another via a bacteriophage, a virus that infects bacteria. During the viral replication cycle, the bacteriophage incorporates bacterial DNA into its genome, and when it infects a new bacterium, this DNA can be transferred, leading to genetic variation. Transduction plays a significant role in the spread of antibiotic resistance genes among bacterial populations. The mechanism of transduction was first described in 1952 by Joshua Lederberg and Norton Zinder, and it has since been studied extensively in both bacteria and viruses.

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Proteomics is the study of proteins and their functions within a biological system. Four methods used to study proteins are mass spectrometry, two-dimensional gel electrophoresis, protein microarrays, and protein-protein interaction studies. Two major databases for analyzing the proteome are UniProt and the Protein Data Bank (PDB).

The two main types of secondary structure in proteins are alpha helix and beta sheet.

Proteomics is the study of proteins, their structures, functions, and interactions within a biological system. It involves the large-scale analysis of proteins to understand their roles in various cellular processes, disease mechanisms, and drug discovery.

There are several methods used to study proteins in proteomics research. Here are four commonly employed techniques:

a) Mass Spectrometry (MS): This method identifies and quantifies proteins based on their mass-to-charge ratio. It involves ionizing proteins and measuring their mass spectra, which provide information about protein identity, post-translational modifications, and protein-protein interactions.

b) Two-Dimensional Gel Electrophoresis (2D-PAGE): It separates proteins based on their isoelectric point (pI) and molecular weight using gel electrophoresis. This technique allows the visualization and comparison of protein expression patterns among different samples.

c) Protein Microarrays: These are high-throughput platforms that immobilize a large number of proteins on a solid surface. They enable the simultaneous detection and quantification of protein-protein interactions, protein-DNA interactions, and protein-small molecule interactions.

d) Protein-protein interaction studies: These methods aim to identify and characterize protein-protein interactions. Techniques such as yeast two-hybrid screening, co-immunoprecipitation, and pull-down assays are commonly used to study protein-protein interactions and understand protein complex formation.

Two major databases commonly used for analyzing proteomic data are:

a) UniProt: UniProt is a comprehensive protein database that provides information on protein sequences, functional annotations, post-translational modifications, protein-protein interactions, and protein structures. It integrates data from various sources and is widely used in proteomic research.

b) Protein Data Bank (PDB): PDB is a repository of experimentally determined protein structures. It provides three-dimensional coordinates of proteins, allowing researchers to analyze protein structures, understand their functions, and perform structure-based drug design.

The two main types of secondary structure in proteins are alpha helix and beta sheet.

Alpha helix: An alpha helix is a common folding pattern in proteins where the polypeptide chain adopts a helical structure. It is formed by hydrogen bonds between the amino acid residues within the chain. The helix is stabilized by intrachain hydrogen bonding, with the side chains extending outward from the helix axis.

Beta sheet: A beta sheet is another prevalent secondary structure in proteins, characterized by extended strands of polypeptide chains connected by hydrogen bonds. The strands can be parallel or antiparallel, and they can interact with each other to form a stable beta sheet structure. Beta sheets often play a crucial role in protein folding and stability.

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Upon detecting epinephrine, the liver cells, also known as hepatocytes, respond by rapidly breaking down glycogen, a stored form of glucose, through a process called glycogenolysis.

This process releases glucose into your bloodstream, supplying your body with a quick source of energy. This increase in blood glucose levels is essential for providing your muscles and brain with the energy needed to react promptly to the potential danger.

Furthermore, epinephrine also stimulates other metabolic processes that help your body cope with stress. These include increased heart rate, blood flow redirection to essential organs, and heightened alertness. Overall, the response of your liver cells to epinephrine plays a critical role in your body's ability to quickly adapt to threatening situations.

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Answer:

A

Explanation:

Artificial active immunity is obtained through vaccination or immunization against a specific pathogen. The human body produces its antibodies in response to the vaccine antigen. Therefore, vaccination for measles is an example of artificial active immunity. As a result, the correct option is Vaccination for measles.

Active immunity is the production of antibodies by the host's immune system in response to an antigen. Active immunity may be acquired by either contracting an infectious disease or receiving a vaccination. Active immunity may last a lifetime or for a short period, depending on the way it is acquired. Active immunity is divided into two categories: natural active immunity and artificial active immunity. In natural active immunity, a pathogen enters the body and causes an illness, resulting in an immune response. For example, a person who has contracted measles is now immune to it and will not get it again in their lifetime.Artificial active immunity, on the other hand, is the result of a deliberate exposure to an antigen that does not result in disease, but rather in the production of antibodies. The injection of an antigenic material, such as a vaccination, into the body is an example of artificial active immunity.

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Answer:

yes

Explanation:

It is a fat-soluble vitamin that has long been known to help the body absorb and retain calcium and phosphorus; both are critical for building bone. Also, laboratory studies show that vitamin D can reduce cancer cell growth, help control infections and reduce inflammation.

Answer:

A physical change effects a substance physically. Examples include cutting, bending, dissolving, freezing, boiling, and melting.

A chemical change effects a substance chemically. Examples include burning, rusting, and digesting.

Hope this helps.

The S-Curve model of the diffusion of innovation illustrates the adoption of a new idea, technology, or product over time.

What do you mean by diffusion?

Diffusion is the process by which molecules or particles move from an area of high concentration to an area of low concentration. This process occurs in both liquids and gases and is driven by the kinetic energy of the molecules or particles. Diffusion is an important process in living organisms as it allows nutrients and other molecules to be transported throughout the body.

The curve shows how an innovation starts slowly, accelerates, then slows down as it reaches its maximum level of adoption. It can be used to predict the growth and decline of an innovation and to assess the impact it will have on a population or organization.

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Answer:

The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged). Atoms have different properties based on the arrangement and number of their basic particles.

PLEASE REFER TO MY IMAGE LABELED BELOW TO HELP YOU UNDERSTAND MORE.

HOPE IT HELPS : D

Explanation:

Answer:

Pp and Pp

Explanation:

They are both heterozygous

I dont think the answer is in the options

Answer:

Pp ´ Pp

Explanation:

Mitosis is a process by which the cell divides itself, creating two identical cells. Therefore, the correct answer is B. cell division.

B, mitosis is a form of cell division. Hope this helps! :)

Answer:

According to my search:

Explanation:

The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress. It also allows cells to develop turgor pressure, which is the pressure of the cell contents against the cell wall.

Generally:

The cell wall is a structure only found in plants. It surrounds the cell and it provides protection, as well as gives it its structure and helps with filtering what goes in and out.

Covering only part of a leaf with a cardboard strip is a deliberate experimental manipulation used to investigate the effects of light availability on plant responses. It allows researchers to create different light conditions and compare the physiological and developmental changes between the covered and uncovered portions of the leaf. This experimental design provides valuable insights into plant adaptation to light and the underlying mechanisms of light perception and response.

Covering only part of a leaf with a cardboard strip in a scientific experiment or observation is typically done to investigate the effects of light availability on plant physiology and development. It allows researchers to create different light conditions and compare the responses between the covered and uncovered portions of the leaf. This experimental design provides valuable insights into the role of light in various plant processes.

When a cardboard strip is placed over part of a leaf, it acts as a barrier that blocks or reduces the amount of light reaching that specific area. This manipulation enables researchers to simulate shade conditions and study the adaptive responses of plants to varying light levels.

By comparing the covered and uncovered portions of the leaf, scientists can observe and measure the differences in photosynthesis, growth, and other physiological processes. For example, they can assess how light availability affects chlorophyll production, stomatal conductance, leaf expansion, and overall plant performance.

This experimental approach also helps in understanding the mechanisms of light perception and signal transduction in plants. By examining the responses of the covered and uncovered parts, researchers can investigate how plants adjust their physiological and developmental processes to optimize light capture and energy utilization.

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Answer: frig metamorphosis is complete

Explanation:

This is because in complete metamorphosis, frog develop from egg to adults. Metamorphosis refers to change of shape and growth in different stages of animals life cycle.

Frog mate in the rainy season.

There are four stages of frog metamorphosis and they are;

1 Egg : the female mate with the male and the male fertilizes the egg. The female releases the fertilized egg inside water , they egg are jelly like or cover with jelly covering.

2. Tadpole: the egg then hatched into tadpoles. The tadpoles live in water, it does not have lungs and limbs. It move like fish and uses gills to breathe. At this stage it starts developing hind limbs and later lungs. It has long tail

3. Froglet : At this stage, the lungs and the front legs develop. It floats above the water to breathe. The tail become shorter and it uses nutrients stored in the tail to feed or survive.

4. Adult : this is the final stage, the young frog leave water and start live on land, it's tail disappear completely and it's start feeding on insects.

A small, tumorlike, benign growth that projects from a mucous membrane surface is called a polyp. A polyp is a growth that can occur in various parts of the body, including the colon, nasal cavity, and uterus.

These growths usually develop on a mucous membrane, which is a type of tissue that lines many internal organs and body cavities, such as the respiratory, digestive, and reproductive systems. The exact cause of polyps is not always known, but they are often associated with chronic inflammation or irritation of the mucous membrane.

Polyps can vary in size and shape and may be asymptomatic or cause symptoms such as bleeding, pain, or difficulty breathing. While some polyps may be cancerous, most are benign, meaning they do not spread to other parts of the body. However, even benign polyps can cause complications if left untreated, such as obstructing a passageway or becoming infected.

Treatment for polyps depends on their location and size. Some polyps can be removed during a routine procedure, while others may require surgery. Preventative measures such as regular screenings and avoiding risk factors like smoking and excessive alcohol consumption can also reduce the risk of developing polyps.

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