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The Paleozoic Era began approximately 550 million years ago and ended approximately 252 million years ago.

The Paleozoic Era is a geological epoch that lasted about 541 million years and ended about 252 million years ago.

It is also known as the "Age of Invertebrates" because it witnessed the rise and dominance of numerous invertebrate groups, including trilobites, brachiopods, and ammonites.

From oldest to youngest, the Paleozoic Era is divided into six periods: the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian.

Many significant events in the evolution of life on Earth occurred during this time period, including the Cambrian period's explosion of diversity, plant and animal colonization of land, and the emergence of reptiles and insects.

Thus, the answer is 550 million years ago.

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Answer:

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Answer:  1. messenger RNA (mRNA). 2. rna, gene, protein. brainliest?

Explanation:

The end result of transcription is mRNA, and the correct sequence of molecules in protein synthesis is Gene → Transcription (RNA) → mRNA → Protein.

Transcription is the process in which a segment of DNA is used as a template to synthesize a complementary mRNA molecule. It occurs in the nucleus of eukaryotic cells and in the cytoplasm of prokaryotic cells. During transcription, the DNA molecule unwinds, and an enzyme called RNA polymerase binds to a specific region of the DNA known as the promoter. The RNA polymerase then moves along the DNA strand, synthesizing a complementary mRNA molecule using the base pairing rules (A with U, G with C).

The end result of transcription is the production of mRNA. mRNA is a single-stranded molecule that carries the genetic information from the DNA to the ribosomes in the cytoplasm. It serves as a template for translation, where the information encoded in the mRNA is used to synthesize proteins.

Regarding the sequence of molecules in protein synthesis, the correct order is as follows:

Therefore, the correct sequence of molecules in protein synthesis is Gene → Transcription (RNA) → mRNA → Protein.

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Answer:

If you`re asking what the term for this definition is, it`s DNA replication

Explanation:

Answer:

DNA Replication

Explanation:

In molecular biology, DNA replication is the biological process of producing two identical replicas of DNA from one original DNA molecule. DNA replication occurs in all living organisms acting as the most essential part for biological inheritance. Additionally, Walther Flemming's drawing of chromosomes. This process involves replication of the cell's chromosomes, segregation of the copied DNA, and splitting of the parent cell's cytoplasm. The outcome of binary fission is two new cells that are identical to the original cell.

Answer:

The box on top of warm, moist air rising goes first. Next is the Rain shadow effect. Then lastly air cooling and condensing.

Explanation:

saying good things like your so smart and your an angle and saying bad is your a devil

Answer:

eating, studying, taking care of yourself, taking drugs, falling in love when its a wrong time for it, being mean to parents

Explanation:

Answer:

C

Explanation:

Answer:

C) Lion

Explanation:

The lion was the first animal to start the food cycle because it originally killed the antelope and ate the majority of it and scavengers came to eat the leftovers.

Answer:

1) D

2) B

3) True

4) B

Explanation:

Answer:

C. where plants can capture sun light

Explanation:

The answer is (A. mitosis)

Answer:

Speciation is the process of formation of a new genetically independent group of organisms, called species, through the course of evolution. The process of splitting of genetically homogenous population into two or more populations that undergo genetic differentiation and eventual reproductive isolation is called speciation.

Answer:

Explanation:

Evolution is a natural phenomenon by which inheritable characteristics of a species change over generations. It mainly relies on processes such as natural selection, genetic drift, migration, and mutation. ... Isolation (geographical or reproductive) prevent the flow of genetic material between the populations.

Answer:

1. Cell replication starts into the mitosis phase of the cell cycle

2. Helicase begins to break the hydrogen bonds between nitrogen bases

3. The double coiled shape of DNA is called double helix

4. DNA polymerase attach the free-floating nucleotides to the exposed nitrogen bases.

5. Free floating nucleotides pair up with exposed nitrogen bases

6. Guanine, Adenine, cytosine and thyamine are the four nitrogen bases

7. In DNA, cytosin always forms hydrogen bonds with guanine.

8. The sequence of DNA carries the genetic information of an organism

9. The process of mitosis produces a new copy of an organism's genetic information.

10. Two new molecules of DNA are created

Explanation:

Through this replication process two complete molecules of DNA are created from one DNA molecule, with a double helix structure. This event is important for every organism in order for they to grow, reproduce and repair.

There are many proteins and enzymes that take part in all these steps.

The correct order of DNA replication is:

1. Cell replication starts into the mitosis phase of the cell cycle.

2. Helicase begins to break the hydrogen bonds between nitrogen bases.

3. The double coiled shape of DNA is called a double helix.

4. DNA polymerase attaches the free-floating nucleotides to the exposed nitrogen bases.

5. Free-floating nucleotides pair up with exposed nitrogen bases.

6. Guanine, Adenine, cytosine and thymine are the four nitrogen bases.

7. In DNA, cytosine always forms hydrogen bonds with guanine.

8. The sequence of DNA carries the genetic information of an organism.

9. The process of mitosis produces a new copy of an organism's genetic information.

10. Two new molecules of DNA are created.

DNA replication is the process by which a molecule of DNA is duplicated.

When a cell divides, it must first duplicate its genome so that each daughter cell winds up with a complete set of chromosomes.

Thus, the correct order of DNA replication is that.

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Answer:

no they do not have hair, even tough it may look like they have hair its only pieces of skin.

Explanation:

Catfish do not have hair. They have barbels, which are long, thin feelers that are used to sense their surroundings. Hence option B is correct.

The barbels are covered in taste buds, which allow the catfish to taste the water and find food. Hair is made of keratin, which is a protein. Catfish do not have keratin in their skin, so they cannot grow hair.

However, some catfish species have barbels that are covered in small, hair-like projections. These projections are not actually hair, but they are similar in appearance.

Therefore, option B) No is correct.

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Answer:

Explanation:

The gas exchange of plants is part of the cellular respiration process, where the plants both remove and release gases into the atmosphere. This exchange happens through structures present in the leaves of plants, which are called stomata. Stomata function as doors, if they are closed it is impossible for the plant to promote gas exchange, but if they are open. Transpiration occurs with the release of water vapor through open stomata. It is in this water vapor that the plant releases oxygen into the atmosphere.

The opening and closing of the stoma is a highly regulated process, because opening the stoma makes the plant lose water. In this case, the guard cells are responsible for opening and closing the stoma whenever necessary and the plant has good water levels.

Answer:

B

Explanation:

During the process of inhalation, the lung volume expands as a result of the contraction of the diaphragm and intercostal muscles (the muscles that are connected to the rib cage), thus expanding the thoracic cavity. Due to this increase in volume, the pressure is decreased, based on the principles of Boyle's Law

Answer:

all the living things in the forest ecosystem

Answer: D

Explanation:

The significance to scientists of finding a new, unknown fossil is that it provides evidence of links between evolutionary species

Answer:

D

Explanation:

Answer:

Cells need oxygen and glucose.

Without oxygen, electron transport chain cannot take place and the cells cannot get the energy they need (since the cell uses oxygen to break down glucose which os what produces energy). When the cells cannot perform their function, they die.

Answer:

van is interested in becoming an engineer in the field of improving communication technology. He hasn't yet decided if he wants to focus more on the hardware or software side of the technology. What would Ivan be studying if he focused on software? ... the antenna within the technology that sends and receives the data.

Explanation:

Ivan would need to study the programming that makes the physical parts of the technology run​ if he focused on software. Thus, the correct option for this question is D.

Communication technology may be defined as a type of modern technology that transfers specific information among people within a fraction of a second and/or machines through the utilization of technology.

The software side of technology deals with all sorts of programming and its languages that make it possible to run physical parts of the technology. This side of the technology develops methods, programming languages, and tools to assists in exploring the function of physical parts.

Therefore, the programming that makes the physical parts of the technology run​ will the primary focus of Ivan if he focused on software. Thus, the correct option for this question is D.

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Answer:

The answer above was wrong. Maybe it wanted it put in a different way but don’t do what i did

Explanation:

Plato

The two specific concerns of species diversity are species survival and evenness of species abundance. The correct options are A and B.

"Species diversity is defined as the number of different species present in an ecosystem and their relative abundance." When all of the species present are equally abundant in the area, diversity is greatest.

Species diversity is a measure of the number of different species found in a given ecosystem or habitat.

It is critical to be concerned about species survival because the extinction of a species can have a negative impact on the entire ecosystem.

Furthermore, the evenness of species abundance is important to consider because the dominance of one or a few species can have a negative impact on the diversity and stability of an ecosystem.

Thus, the correct options are A and B.

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Answer:

c. Genetic resistance

Explanation:

Answer:

Explanation:

Race car drivers and teams monitor the engine for how effective it is transferring energy from potential and kinetic through RPM, or how fast the engine is moving. Kinetic energy inside the engine is transformed from chemical energy (fuel, air and spark plugs) to mechanical energy.

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Answer:

Photosynthesis converts carbon dioxide and water into oxygen and glucose. Glucose is used as food by the plant and oxygen is a by-product. Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process.

Explanation:

Answer:

me

Explanation:

becesu im the best guy

Answer:

Antibiotics, also known as antimicrobial drugs, are drugs that fight infections caused by bacteria. Alexander Fleming discovered the first antibiotic, penicillin, in 1927. After the first use of antibiotics in the 1940s, they transformed medical care and dramatically reduced illness and death from infectious diseases.

The term "antibiotic" originally referred to a natural compound produced by a fungus or another microorganism that kills bacteria which cause disease in humans or animals. Some antibiotics may be synthetic compounds (not produced by microorganisms) that can also kill or inhibit the growth of microbes. Technically, the term "antimicrobial agent" refers to both natural and synthetic compounds; however, many people use the word "antibiotic" to refer to both. Although antibiotics have many beneficial effects, their use has contributed to the problem of antibiotic resistance.

Antibiotic resistance is the ability of bacteria or other microbes to resist the effects of an antibiotic. Antibiotic resistance occurs when bacteria change in some way that reduces or eliminates the effectiveness of drugs, chemicals, or other agents designed to cure or prevent infections. The bacteria survive and continue to multiply causing more harm.

Answer:

Photosynthesis and metabolism are among the most complex areas in biology so given the nature of this forum I've kept the answers simple and brief.

Carbon is of central importance to all biological systems due to its special bonding properties allowing it to form various bonds with other atoms and produce a wonderfully complex range of molecules used by life.

In photosynthesis inorganic carbon in carbon dioxide gas is fixed to hydrogen to produce sugar, an organic molecule. In this case the carbon gains electrons so it is 'reduced' and this process requires energy in the form of light. Once in sugar form, the process can be reversed and the carbon can be oxidised back into carbon dioxide during cellular respiration, releasing energy.

So in photosynthesis, the carbon from carbon dioxide is reduced to form a sugar molecule. When transitioning to respiration, the carbon in the sugar is oxidised to form carbon dioxide again in the reverse reaction to photosynthesis.

The carbon is transferred between molecules through various intermediate steps during these processes, involving enzymes (biological catalysts) to assist in cleaving specific bonds at each stage. During cellular respiration (an energy release reaction) as the carbon is successively oxidised electrons are liberated that are used as part of the energy release. These electrons are captured or 'carried' by special organic molecules called NAD and FAD (reducing them) which in turn can then be oxidised to produce the universal energy currency of life: ATP molecules. ATP is a small bio molecule containing a high energy phosphorous bond that can be broken to release energy to do cellular work. It is used by all life that we know of and is the ultimate product of cellular respiration.

The carbon atom in a CO₂ molecule in the air can become a part of the

cellulose molecule in a plant by the carbon dioxide molecule reacting with the  water during photosynthesis to form Glucose.

     plants which are such as the roots and stems and help in the formation of cellulose.

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