Which statement best describes an independent variable? A-The variable that responds to change in a investigation B- The variable you can change in an investigation C- The effect in a cause/effect relationship D- The factor that can never change in an investigation

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Answer 1

Answer: The statement that best describes an independent variable is B. the variable you can change in an investigation. There can be only one independent variable during an experiment, because if you change more things, you won't know which variable it is that brought about the change. So, there is one variable that you change that doesn't depend on anything else and that you can alter in order to get the results you want.

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Help me name the parts of the diagram pls

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Top left animals cell

Which of the following defines a genome? A) representation of a complete set of a cell's polypeptides
B) the complete set of an organism's polypeptides
C) the complete set of a species' polypeptides
D) a karyotype
E) the complete set of an organism's genes

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The options that are incorrect are A) representation of a complete set of a cell's polypeptides, B) the complete set of an organism's polypeptides, C) the complete set of a species' polypeptides, and D) karyotype, which makes E) the complete set of an organism's genes the correct answer to what defines a genome.

The option defines a genome the complete set of an organism's genes.

The correct option is E.

A genome refers to the entire set of genetic material or genes present in an organism. It includes both the coding and non-coding regions of DNA that make up an organism's genetic instructions. Genes are segments of DNA that contain the information necessary for producing specific proteins or functional RNA molecules. The genome of an organism encompasses all the genes and genetic elements that contribute to its characteristics, traits, and biological functions.

Option A is incorrect because a cell's polypeptides represent the proteins produced from its genes, but they do not encompass the complete set of an organism's genes. Option B is incorrect because while it mentions the complete set of an organism's polypeptides, it does not encompass the non-coding regions of the genome.

Hence , E is the correct option

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How does the water molecule differ from other compounds of similar size?

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Water molecules does behave differently from other chemical compounds. because:

Water molecules contains a oxygen atom (O) and the two hydrogen atoms (H) which are asymmetrically arranged.

Water molecule can form up to four of hydrogen bonds and together, they give water a cohesiveness pertains in liquids.

In some substances, the atoms and molecules move closer together as they get colder and then solidify or freeze up. Water does attains its greatest density at four degrees Celsius because the water molecules are packed closest together at a particular temperature

Water does play a role in climate not only in its liquid and solid states.

water vapour in the atmosphere affects the heat budget of the Earth and greenhouse effect.

Conclusively, water is a universal solvent that is taken in by man. Its molecules are not harmful to man when consumed.

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Answer:

Water is the universal solvent, and since it's a polar molecule it can break up and dissolve other substances and ionic compounds; besides, water owns more plasticity and resilience due the way its atoms are linked together, being able to undergo drastic temperature changes.

Explanation:

Which of the enzymes from the following list would you need to make a recombinant DNA molecule? What is the function of those enzyme(s) in the process? a) DNA polymerase b) RNA polymerase c) A restriction enzyme d) DNA ligase e) An aminoacyl-tRNA synthetase f) Peptidyl transferase g) Reverse transcriptase

Answers

The correct answer for the question that is being presented above is this one: "a) DNA polymerase b) RNA polymerase." The enzymes from the following list would you need to make a recombinant DNA molecule are a)DNA polymerase b) RNA polymerase

What kind of molecules serve as electron acceptors in cellular respiration?

Answers

Kind of molecules that serves as electron acceptors in cellular respiration are called molecules with low potential energy. I am pretty sure that you will find this answer helpful. Have a nice week!

Final answer:

In cellular respiration, oxygen acts as the final electron acceptor in aerobic respiration, while organic or inorganic molecules can serve as electron acceptors in anaerobic respiration and fermentation.

Explanation:

The molecules that serve as electron acceptors in cellular respiration play a crucial role in the generation of ATP. In aerobic respiration, the final electron acceptor is an oxygen molecule (O₂), which allows for the production of ATP by transferring high-energy electrons from NADH or FADH₂ through the electron transport chain (ETC). When insufficient oxygen is present, organisms must employ alternative mechanisms such as fermentation or anaerobic cellular respiration, whereby organic or inorganic molecules other than oxygen act as the final electron acceptors to regenerate NAD⁺ from NADH, allowing processes like glycolysis to continue.

In the absence of oxygen, some microorganisms, like methanogens and sulfur bacteria, perform anaerobic respiration using inorganic molecules like carbon dioxide and sulfate to regenerate NAD⁺. This process is critical for enabling energy conversion in environments where oxygen is scarce.

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Cells of a normally rod-shaped bacterium (e.g., Bacillus subtilis) that have completely lost the ability to produce the MreB protein would mostly likely be

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Answer:

The bacterium will be a spherical shape

Explanation:

The responsible for the width of rod-shaped bacteria is the protein called MreB. This protein forms large microfilaments that are very similar to actin filaments found in eukaryotic cells. All the bacteria that are spherical by nature doesn’t have the protein MreB. So, if a rod-shape bacterium that doesn´t have a MreB protein or is altered this bacterium would be spherical-shape.

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