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3 years ago

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Archaeopteryx fossils show that the animal had feathers like a bird. It also had a bony tail, teeth, and claws on its wings like

a reptile. Scientists claim this is evidence of a common ancestor. What makes this a sound claim?

1 answer:

rusak2 [61]3 years ago

8 0

The right answer for the question that is being asked and shown above is that: "b. Archaeopteryx fossils share traits with both birds and reptiles."

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Earth’s axis passes through the_____and South Poles. It takes Earth____hours to rotate once around its axis. Earth revolves once

barxatty [35]

Earth’s axis passes through the North and South Poles. It takes Earth 24 hours to rotate once around its axis. Earth revolves once around the Sun in 365 days during a non-leap year.

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2 years ago

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The set of proteins in the cristae of the mitochondrion, which collectively extract the energy from reduced coenzymes to form at

lesantik [10]

Cell respiration involves different steps, among which there is the oxidative phosphorilation that produces and stores ATP. The answer is the <u><em>electron transporter chain</em></u>.

<h3>ELECTRON TRANSPORTER CHAIN -oxidative phosphorylation-</h3>

The electron transporter chain + chemiosmosis constitute the process of oxidative phosphorylation.

Chemiosmosis

Chemiosmosis refers to ATP production through a proton gradient.

Electron transporter chain

The electron transporter chain is a series of molecules and proteins located in the internal mitochondrial membrane.

It constitutes a series of enzymatic reactions to release and save energy for the correct functioning of the organism.

Along the chain, there are four proteinic complexes in the membrane, I, II, III, and IV, that contain the electrons transporters and the enzymes necessary to catalyze the electrons' transference from one complex to the other.

Different redox reactions occur to pass electrons along the chain.

Released energy creates a proton concentration gradient used to synthesize ATP.

<h3>Steps in the electectron transporter chain</h3>

1) NADH provides electrons to the first complex, Complex I. From there, electrons go to the coenzyme Q that carries them to complex II. Meanwhile, complex I pomp four protons to the intermembrane space.

2) Complex II receives electrons from CoQ and also receives electrons from FADH2. Electrons are sent from complex II to ubiquinone Q, which carries these electrons to complex III.

3) Complex III receives electrons from ubiquinone Q and pomps protons to the intermembrane space. Electrons are transferred to Cytochrome c.

Electrons travel from cytochrome c to complex IV.

4) Complex IV is the last complex that pomps protons to the intermembrane space.

5) Electrons are sent to O₂ molecules, which also receive protons in the matrix to create water molecules. Four electrons are needed to produce two water molecules from one O₂ molecule.

The proton gradient is used to produce ATP molecules.

In conclusion, <em>the set of proteins in the cristae of the mitochondrion, which collectively extract the energy from reduced coenzymes to form atp, are called the</em> <u><em>electron transporter chain</em></u>.

You will learn more about the electron transporter chain at

brainly.com/question/24372542

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2 years ago

Chap 2.3 biology;;

Murrr4er [49]

Answer:

Monomer: 2 - Amino acid

3 -Nucleotide

Polymer: 1 - Cellulose

3 - Nucleic acids

Example: 1 - Carbohydrates

2 - Collagen

Function 1: Carbohydrates are a source of energy in the body.

Function 2: Collagen is the most abundant protein in the human body. It's a long, fibrous structural protein that supports tissues and gives structure to individual cells. Collagen fibers are tough and found in bundles. They providing tensile strength to the tissues containing them.

Function 3: DNA is a protein structure that carries instructions needed for an organism to develop, survive and reproduce. It is a nucleic acid that contains the genetic instructions for the development and function of living things, its main role is the long-term storage of information

Explanation:

Monomers are single molecules that can bond with identical molecules to form polymers.

1. Glucose can combine with other glucose molecules to form starch or cellulose which results in formation of carbohydrates.

Carbohydrates are a source of energy in the body.

2. Amino acids can combine with other amino acids to form a protein chain which results in formation of collagen

Collagen is the most abundant protein in the human body. It's a long, fibrous structural protein that supports tissues and gives structure to individual cells. Collagen fibers are tough and found in bundles. They providing tensile strength to the tissues containing them.

3. Nucleotides can combine to form nucleic acids resulting in formation of enzymes.

DNA is a protein structure that carries instructions needed for an organism to develop, survive and reproduce. It is a nucleic acid that contains the genetic instructions for the development and function of living things, its main role is the long-term storage of information

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2 years ago

In the scientific method, the hypothesis comes after the

Nonamiya [84]

Answer: Purpose

Explanation: If you have no purpose or inclination to have a hypothesis, you wouldn't have a hypothesis in the first place. Plus, it can't be experiment because there isn't anything to experiment without a hypothesis. The analysis is, well analyzing your data to see if your hypothesis is realistic. Definitely, not conclusion. <span />

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2 years ago

What is the cerculatory system of a sea anemones

tekilochka [14]

Sea anemone's stomach serves as a "circulatory system" because it is a <span> gastrovacular system.</span>

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2 years ago