How has the earth changed over time?

Answers

Answer 1

Answer

La historia de la Tierra no ha sido una evolución gradual desde que nació hace más de 4.500 millones de años, como una bola incandescente, hasta el actual planeta azul lleno de una vida compleja y diversa.

Answer 2
Earth and its atmosphere are continuously altered. Plate tectonics shift the continents, raise mountains and move the ocean floor while processes not fully understood alter the climate. Such constant change has characterized Earth since its beginning some 4.5 billion years ago.

Related Questions

what happens during telophase​

Answers

Answer:

Telophase is the fifth and final phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. During telophase, a nuclear membrane forms around each set of chromosomes to separate the nuclear DNA from the cytoplasm.

Which of the following best helps scientists determine the order in which a species evolved? A) Type of fossil B) Geographic location of the fossil C) Location of the fossil in Earth's layers D) Species of the fossil

Answers

Answer: I’m pretty sure it’s the geographic location of the fossil. B

Explanation: Because when they die they go into the ground but then more layers of earth for and different species are shown but at different depths.

similar to protists, archaea can reproduce to generate two genetically identical daughter cells through

Answers

The answer is mitosis

Similar to Protists, Archaea can reproduce to generate two genetically identical daughter cells through Binary fission.

What is Binary fission?

Binary fission may be defined as a type of asexual reproduction in which an organism significantly duplicates its genetic content. According to this, the deoxyribonucleic acid (DNA), and then divides into two parts (cytokinesis), with each new organism receiving one copy of DNA.

According to the context of this question, binary fission is a mechanism of reproduction in simpler organisms through which a parent cell divides into two genetically identical daughter cells.

Archaea can also reproduce asexually through budding and fragmentation, where pieces of the cell break off and form a new cell, also producing genetically identical organisms.

Therefore, similar to Protists, Archaea can reproduce to generate two genetically identical daughter cells through Binary fission.

To learn more about Binary fission, refer to the link:

https://brainly.com/question/983753

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ANSWER AND EXPLAIN PLZ:)

Answers

Answer:

The independent variable in the experiment is A. the jar covers.

Explanation:

The independent variable in an experiment represents the thing that the person conducting the experiment changes or alters.  One group in the experiment had covers (this represents the experimental group) and the other group had no cover (this represents the control group which was not exposed  to the independent variable).  Since the only thing that Redi changed between the two groups was whether or not the jars were covered, this represents the independent variable.

The number of jars and the contents of the jars were constant in both experiments, and the number of maggots on the meat is the dependent variable (the result of changing the independent variable).

Hope this helps!

How many total atp are produced during aerobic respiration

Answers

The number of ATP molecules produced in aerobic respiration is 38 ATP molecules.

What is aerobic respiration?

Aerobic respiration refers to the process by which the body breaks down food molecules in the presence of oxygen to produce energy for the body in the form of ATP molecules.

Aerobic respiration consists of:

glycolysisTCA cycleElectron transport chain.

The number of ATP molecules produced in aerobic respiration is 38 ATP molecules.

In conclusion, aerobic respiration takes place in the presence of oxygen.

Learn more about aerobic respiration at: https://brainly.com/question/11691469

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what is biology class

Answers

Answer:

Biology is the branch of science that deals with the study of living organisms and vital processes

Explanation:

I ♥️ Biology class

How does the production and availability of natural resources influence human activity?

Answers

Answer:

It influence human activity because, natural resources, we mostly use them in almost every day. Which is wood, water, oil, and etc those stuff and those stuff I named we use them almost every single day.  And production, is like creating something like a building, which could be a office building for people and work there. I hope my answer helps you!

Explanation:

In a number sequence, the numbers are known as the _______.

Answers

Answer:

repeating numbers

hope this helps you

How does biology compare with other fields of science?

Answers

I think it helps shows some of basic since you should already know

identify monomers and describe the function for all macromolecules

Answers

The first one is a lipid.

The second is a carbohydrate.

The third are nucleic acids.

Transport of D- and L- glucose proceeds at the same rate down an electrochemical gradietn by which ofhte following processes?
a. simple diffusion.
b. facilitated diffusion.
c. primary active transport.
d. cotransport.
e. counter transport.

Answers

Answer:

Explanation:

Active transport is the movement of molecules or substance from a region of lower concentration to a region of higher concentration across a cell membrane against the concentration gradient.

Active transport requires cellular energy and are of two types:

primary active transport that uses adenosine triphosphate (ATP), and secondary active transport that uses an electrochemical gradient.

Active transport helps in the uptake of glucose in the intestines.

Cotransport or secondary active transport is the movement of molecules across a membrane it uses electrochemical potential difference that is created by pumping ions in or out of the cell.

Cotransport helps in the transport of glucose across the cell membrane.

Which statement about conjunction is true

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Answer:

Hello...

Conjunctions are words that unite or connect parts of a sentence.

Hope it's help :)

Question 1 (2 points) BIOLOGY HELP PLEASEEEEEE! Scientists are conducting an experiment on a new specimen. They are trying to determine what it is made of. What indicator could they use test for the presence of proteins? Question 1 options: Iodine Benedict's Solution Biuret Reagent Paper Bag Test Question 2 (2 points) During our lab today, why was test tube five filled with water? Question 2 options: It was the experimental group. It was the control group. Water is the only substance that would react with all of the indicators. Water has reactive properties and would speed up reactions.

Answers

Answer:

Biuret Reagent Water is the only substance that would react with all of the indicators.

Explanation:

Identify the eukaryotic cellular locations of the fundamental processes that are involved in the central dogma of molecular biology by dragging the correct labels to their targets.

Answers

Answer:

See the answer below

Explanation:

The central dogma gives a description of how genetic information travels in biological cells from DNAs to proteins. DNAs are first transcribed into messenger RNAs in a process known as transcription and the resulting mRNAs are used in the synthesis of proteins in a process known as translation.

In eukaryotic cells, transcription process happens within the confines of the nucleus because the genetic material in the form of DNAs are always located in the nucleus. Thereafter, the mRNAs generated from transcription are transported to the cytoplasm of the cell where they become translated into proteins.

Hence;

Transcription happens in the nucleus of the cell.Translation happens in the cytoplasm of the cell.

A single gene produces two different proteins, utilizing different exons. What is the most likely explanation?

Answers

Answer:   Differences in mRNA splicing.

Explanation:

The exon is the region of a gene that is not separated during the cutting and splicing process and thus remains in the mature messenger RNA. In genes encoding a protein, it is the exons which contain the information to produce the protein encoded in the gene. In these cases, each exon encodes a specific portion of the complete protein, so that the set of exons forms the coding region of the gene. In eukaryotes, the exons of a gene are separated by long regions of DNA (called introns) which do not code.

RNA splicing is a post-transcriptional process of maturing RNA from which certain sequential fragments are removed. This process is very common in eukaryotes, and can occur in any type of RNA, although it is more common in mRNA. It consists of removing the introns from the primary transcript and then binding the exons. Particularly, alternative RNA splicing takes place when one gene can produce different proteins as a result of what segments are considered as introns and exons. When different segments are considered exons, the result is a great diversity of mature transcripts which produce different proteins.

So, gene splicing is a post-transcriptional modification in which a gene can code for many proteins, which makes it an important source of protein diversity.

A student conducted a well designed scientific experiment. Which of the following needs to happen in order for the results of the experiment to be widely accepted?

Answers

Answer:

Make an observation.

Ask a question.

Form a hypothesis, or testable explanation.

Make a prediction based on the hypothesis.

Test the prediction.

Iterate: use the results to make new hypotheses or predictions.

g A ________________ gradient is directly used to provide the energy for ATP synthesis in the mitochondria.

Answers

Answer:

Elerochemical gradient

Explanation:This coccus during  the  process of  chemiosmosis in oxidative phosphorylation during cellular respiration. It is the  electrochemical gradient that provides the energy  needed by ATPase Synthase for the phosphorylation of ADP tp ATP, necessary for ATP production

The electochemical gradient is due to  gradient produced from the pumping of protons by the proton  motive force(PMF) into the intrammenbrane space. from the matrix.The accumulation leads the the production of electrochemical gradients because the Protons diffuse across  from higher gradient in the intramembrsne space into the lower concentration gradient the matrix.Therefore,energy is produced  as the diffusion takes place.

The ETC, is the source of generation of PMF, which pumps protons across into the intramembrane, for the electrochemical gradients productions

what is the full form of RBC​

Answers

the answer would be red blood cell

David suffers from a re-gurgitating mitral valve. this condition would cause:_______.a) increased cardiac output from the right ventricle. b) edema in the lower limbs. c) fluid congestion in the lungs. d) decreased heart rate. e) a bruit sound when ausculated with a stethoscope.

Answers

Answer:

The correct answer is: E) a bruit sound when auscultated with a stethoscope.

Explanation:

Mitral valve regurgitation is a condition in which the mitral valve - responsible for the blood flow from the left atrium to the left ventricle - doesn't close as tightly as it should, which can result in backward blood flow. If the condition worsens, this defect can lead to heart failure.

Mitral valve regurgitation may not have symptoms at first but, as the condition progresses, shortness of breath, fatigue, and palpitations can occur. When auscultated with a stethoscope, a bruit sound can be heard, which corresponds to the abnormal blood flow that is occurring.

Why are jenner's vaccine superior to previous methods for conferring resistance to smallpox?

Answers

Answer:

The risk of disease transmission is drastically low  with his method, compare to the previous method with great tendency of transmitting diseases,which were lethal to the recipient.

Explanation:

He had noticed that milkmaids were only affected with cowpox,but are not affected with small pox.Thus he reasoned that they must have immunity against small pox.

Through his crude methods he extracted pus from a milkmaid who carried the virus  for cowpox,and inserted this into the arm of a young through the opening created. After latent period of days he exposed the boy to the smallpox,and surprisingly he was not infected,thus the boy developed immunity to this virus which was related to the virus injected.

Thus he was able to develop immunity against the related diseases.

Besides he observed that this boy did not show symptoms of any other diseases or infection.

In a muscle twitch, which best describes what is happening during the latent period?

Answers

Answer:

During latent period, the muscle is preparing itself for contraction which comprises of biochemical activities from the stage acetylcholine bind to sarcolemma through cross-bridge formation.

Explanation:

A single muscle twitch has three stages which are latent period, contraction phase and relaxation stage

During latent period, the muscle is preparing itself for contraction which comprises of biochemical activities from the stage acetylcholine bind to sarcolemma through cross-bridge formation because the latent period is a short delay from the time the action potential get to the muscles until tension can be seen clearly in the muscle and the action potential is being propagated along the sarcolemma.

A period in 24-point font (.) is about 1mm in diameter. SARS-CoV-2 has a diameter of 80 nm. The prefix “milli” means 1000, which tells you there are 1000 millimeters (mm)in a meter. The prefix “nano” means 109 (1 billion), which tells you there are 1 billion nanometers (nm) in a meter. Approximately how many SARS-CoV-2 viruses could fit in that period? (Hint: There are 106nm in 1mm).

Answers

Answer:

Approximately 12,500 SARS-CoV-2 viruses

Explanation:

According to this question, the period described is 1mm in diameter. Since 1millimetre(mm) is 1000metre(m), this means that the period is 0.001m in diameter.

Also, the SARS-CoV-2 virus has a diameter of 80 nm (1nm = 10^9m).

Since 10^6nanometres (nm) or 1,000,000nm makes 1millimeter (mm), 80nm of the virus will be:

= 80/1,000,000

= 0.000080mm or 8 × 10^-5mm

To calculate how many of the SARS-CoV-2 virus will fit into the period, we divide the diameter of the period (in mm) by the diameter of the virus (in mm).

That is; 1 ÷ 8 × 10^-5

= 1/8 × 10^5

= 0.125 × 100,000

= 12,500

Therefore, approximately 12500 SARS-CoV-2 viruses will fit in the period.

An enzyme inhibitor works with the enzyme in a chemical reaction. Which statement best describes how an enzyme inhibitor and an enzyme work in a catalyzed reaction? (5 points) a The enzyme inhibitor catalyzes the reverse reaction, which counteracts the work of the enzyme. b The enzyme inhibitor attacks and destroys the enzyme, which prevents the enzyme from helping in the reaction. c The enzyme inhibitor binds to the products of the reaction, which makes the work of the enzyme unproductive. d The enzyme inhibitor fits into the enzyme's active site, which prevents the enzyme from catalyzing the reaction.

Answers

Answer:

The correct answer is option D. The enzyme inhibitor fits into the enzyme's active site, which prevents the enzyme from catalyzing the reaction.

Explanation:

Enzyme inhibitors are the biochemical or chemical substance which hinders the role and function of the enzyme by binding to the active site of an enzyme.

These can be explained into two categories:  

Irreversible inhibitors: They bound to the enzyme with the assistance of covalent bonds and alters the affinity of the enzyme towards the substrate by changing the state of the dynamic destinations.  

Reversible inhibitors: Theses are the particles that bind to the enzyme's active site with the assistance of non-covalent bonds, for example, hydrogen bonds, hydrophobic bonds, and others.

Thus, the correct answer is : option D.

Answer:

D. The enzyme inhibitor fits into the enzyme's active site, which prevents the enzyme from catalyzing the reaction.

Explanation:

I got it "Correct"

What type of macromolecule would amylase be an example of? Nucleic Acid Carbohydrate Lipid Protein

Answers

Carbohydrates I believe sorry if I’m wrong

Answer:

Enzymes (protein)

Explanation:

What kind of organic macromolecule is amylase? Amylase is a typical enzyme and like the vast majority of enzymes it is a protein.

why do scientists usually try to work without making the animals aware that humans are present

HELP ASAP PLEASE

Answers

Answer:

In animal field studies, why do scientists usually try to work without making the animals aware that the humans are present? It is necessary to observe the animals without disturbing them. When a controlled experiment is not possible, why do scientists try to identify as many relevant variables as possible?

What is the mass number of an ion with 109 electrons, 158 neutrons, and a +1 charge

Answers

Answer:

The mass number is 267.

Explanation:

It is given that,

Number of electrons are 109

Number of neutrons are 158

Charge is +1

We need to find the mass number of the ion.

We know that,

Mass number =  No. of neutrons+ No. of protons

Also, No. of protons = No. of electrons = 109

So,

Mass number = 109+158 = 267

Therefore, the mass number is 267.

The scuba diver is a living system. The scuba gear, or self-contained underwater breathing apparatus, is a system of air exchange. How are these two systems interacting? What are the inputs and outputs of these systems?

Answers

Answer:

Input: oxygen (or air generally), breathed in by the scuba diver

Output: carbon dioxide exhaled by the scuba diver  

Explanation:

The scuba gear is absolutely essential to sustaining this activity by sea divers. It serves the purpose of recycling the air breathed out by the person by filtering out the carbon dioxide. It also makes up for the oxygen that gets used so that the diver can continue breathing in a circuit. Thus, oxygen is considered as input and CO2 as output in this case.

How many molecules of DNA would result from one molecule after five cycles of PCR?
OA. 14
B. 10
C.5
D. 32​

Answers

Answer:

D

Explanation:

PCR, assuming sufficient primers, dNTP’s, and polymerase molecules, doubles the number of target DNA molecules per cycle. 5 cycles corresponds to 5 doublings of the target DNA. 2x2x2x2x2, or 2 to the 5th power is 32.

Explain relationship between adaptation and evolutionary change

Answers

Adaptation is the process of adjusting into something better in the environment or situation. Evolution is a broad term that refers to any change in anything over time.

Classify each statement as an example of adhesion, cohesion, or surface tension. Drag each statement to the appropriate bin. A sewing needle floats when it is placed gently on top of water in a bucket. Water molecules ding to plant cell walls. A water strider runs across a pond without breaking the surface. A drop of water spilled on a table forms a drop on the table, rather than spreading out over the surface. Water molecules cling to the side of a beaker. Water molecules are attracted to each other.

Answers

Answer:

A sewing needle floats when it is placed gently on top of water in a bucket - surface tension

Water molecules ding to plant cell walls - adhesion

A water strider runs across a pond without breaking the surface - surface tension

A drop of water spilled on a table forms a drop on the table, rather than spreading out over the surface - cohesion

Water molecules cling to the side of a beaker - adhesion

Water molecules are attracted to each other - cohesion

Explanation:

The surface tension refers to the tendency of the surface of a liquid to remain unbroken by an external force due to the cohesive property of the molecules of the liquid. Instead of being broken, the surface of the liquid stretches like an elastic membrane.

The adhesive property of a liquid, also known as the force of adhesion, refers to the property of the molecules of the liquid to stick to other molecules while cohesive property or cohesion refers to the property of molecules of liquids to stick to themselves.

Hence,

Surface tension

A sewing needle floats when it is placed gently on top of water in a bucket.A water strider runs across a pond without breaking the surface.

Cohesion

A drop of water spilled on a table forms a drop on the table, rather than spreading out over the surface.Water molecules are attracted to each other.

Adhesion

Water molecules ding to plant cell wallsWater molecules cling to the side of a beaker
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Which situation would result in a theory being replaced rather than revised? Read the following passage from "Arachne and Athena" Part 1. Another woman nodded and added, "Surely, Athena must be helping her! Everyone knew that this was the highest praise. Athena was the Greek goddess of weaving, after all. However, the womans words only made Arachne mad. "This is the work of MY hands, she huffed. "Athena had nothing to do with it! In fact, I do not think that the goddess could match my skill. The people ran off in fright. No one said such things about a goddess, especially Athena. Athena was not only the goddess of weaving; she was also the goddess of war. "You should be ashamed of yourself! Arachnes mother scolded. "Our gifts come from the gods and goddesses, and we should always be thankful. "My gift came from my own hard work! Arachne said, stamping her foot. "Your mother is right, you know, said a voice. Based on the passage here, what prediction should a reader make about what will happen to Arachne if she angers Athena? Athena will punish her. Arachne will run away from home. Athena will punish Arachne's mother. Arachne will keep weaving. Mark this and return I need help like a paragraph so yah this is what I need help with Harnessing Human Energy. (AM GIVING BRAINLIEST) Find all complex numbers z such that z^4 = -4 Note: All solutions should be expressed in the form a+bi, where a and b are real numbers. plz explain What happens if you don't have a mom or dad and your homeless because they put you out the house and all you have is a computer you found in a trash can Which statement describes the motion of an object with a net force is zero 0.11 to the second power Which sentence contains a capitalization error? A. My aunts and uncles are a lot of fun when they visit. B. The Middle School is conveniently located in the center of town. C. Studying engineering is a worthwhile pursuit. D. The American Medical Association, or AMA, is well respected. Choose the correct rhyme scheme for each of the following lines... Following the overthrow of its monarchy in 1894, what territory was annexed to the United States in 1898? A) Alaska B) Hawaii C) Panama D) Puerto Rico "A customer has purchased 1,000 shares of ABC stock at $44 per share, paying a commission of $1.00 per share for the transaction. ABC stock declares a 20% stock dividend. When the dividend is paid, the tax status of the investment is:" In the expression 11 + 3n, the coefficient is 11.(1 point)O This statement is false. In the expression 11 + 3n, the coefficient is 3.This statement is true.This statement is false. In the expression 11 + 3n, the coefficient is n.This statement is false. In the expression 11 + 3n, the coefficient is + 10. What character traits do you think Jeannette inherited from her parents? Offer supporting examples. How do those traits shape her life? Solve 2(x + 1) = 2x + 5 How do scientists calculate the energy and frequency of photons? A rectangle has a length of (2m - 5) inches and a width of (4m - 2) inches. If the rectangle has a perimeter of 382 inches, then what is the length & width of the rectangle? Simplify the expression to a polynomial in standard form: (4x+5) (x^2-3x-2) PLEASE HLEP Multiple choice questions BIOLOGY Jenna was asked to find a fraction equivalent to 4/6 with a numerator of 14.Her answer is 14/16. What error did jenna make in writing equivalent fractions As galaxies move away from our galaxy, a shift on the electromagneticspectrum is noticed. This is called a