2 years ago

PLZ HELP ME D: I will give u brainliest

Biology

1 answer:

stellarik [79]2 years ago

7 0

for question 1.) i am pretty sure of answer a.)

for question 2.) the answer is most likely b.)

i would recommend waiting for a second opinion. just to be safe.

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Use the data to calculate the percentage remaining for samples Y and Z to the nearest tenth of a percent.

marusya05 [52]

Answer:

Y= 98, 0% , Z = 94,7 %

Explanation:

We use simple 3 rules to find the percentage of purity, using mass data:

Sample Y =

85g----100%

83,30g----X = (83,30gx 100%)/ 85g= 98, 0%

Sample Z =

95g----100%

90g----X = (90gx 100%)/ 95g= 94, 7%

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2 years ago

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The body fluid of sharks has a much lower concentration of sodium chloride than that of the surrounding seawater, and yet they a

enyata [817]

A. Sharks store enough urea to match the total solute concentration of the surrounding seawater

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Aleksandr-060686 [28]

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To convert 300 billion kilometer (3,000,000,000 km) into AU you must multiply the kilometer by the equivalent of 1 km in AU (6.68 × $10^{-9}$ )

3,000,000,000 × (6.68 × $10^{-9}$ ) = 20.04 AU

Hope this helped!

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2 years ago

What is a protein that is the main component of the thick filaments in muscle fibers and is responsible for muscle contraction?

STatiana [176]

Answer:

Myosin

Explanation:

Two of the important proteins are myosin, which forms the thick filament, and actin, which forms the thin filament. Myosin has a long, fibrous tail and a globular head, which binds to actin. The myosin head also binds to ATP, which is the source of energy for muscle movement

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