In general life needs to maintain a ph level between

Answers

Answer 1
Answer: 1-12 i think or 5-8.....

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What is the difference between rough ER and smooth ER?

Answers

Rough endoplasmic reticulum contains ribosomes, while smooth endoplasmic reticulum does not contain ribosomes. The ribosomes are what give rough endoplasmic reticulum its characteristic "roughness."

What do ecosystems consist of?a. biotic and abiotic factors
b. biotic factors only
c. abiotic factors only

Answers

Ecosystems mostly consist of both - abiotic and biotic factors. For that reason the answer which would properly address your question would be A - biotic and abiotic factors. Biotic factors are considered to represent the part of nature that are living and affect other organisms while abiotic factors are things which do not affect other living compounds. 

Which process breaks down sugars to make atp when oxygen is present

Answers

I'd check this answer but it's between Cellular Respiration and Aerobic Respiration.

Final answer:

Aerobic respiration is the process that breaks down sugars to make ATP when oxygen is present. It occurs in the mitochondria and provides most of the ATP needed for resting or moderately active muscles.

Explanation:

Aerobic respiration is the process that breaks down sugars to make ATP when oxygen is present. This process occurs in the mitochondria and is responsible for approximately 95% of the ATP required for resting or moderately active muscles. Glycolysis is another process that can generate ATP, but it is an anaerobic process that does not require oxygen.

Learn more about Aerobic respiration here:

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The plasma membrane does all of these except _____ .a. contains the genetic material
b. acts as a boundary or border for the cytoplasm
c. regulates passage of material in and out of the cell
d. functions in the recognition of other cells

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D is the answer because it just protects elements acting as a boundary an does not recognize anything

What three systems supply most of the world's food?

Answers

Answer:

Croplands, range lands, pastures

Explanation:

Croplands,rangelands, pastures

Fruit flies are commonly used in genetic investigations that focus on traits passed from parents to offspring over several generations. What can you infer is the reason fruit flies are the most commonly used organism for this type of investigation?

Answers

Answer:

The correct answer will be-short life span and rapid reproductive.

Explanation:

Fruit flies or Drosophila melanogaster is a model organism used to study the principles of genetics as:

1. Short life span- they have a very short life span about 40-50 days in which they complete their life cycle.

2. Reproduction- The reproduction in an organism is very rapid that is they reproduce and produce a large number of offsprings in a short period of time.

Thus, scientist uses them to study genetics and observe traits in a small period of time.

Fruit flies reproduce rapidly and they have easily observable traits.