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Andrei [34K]
2 years ago
13

The theory of evolution states that all life is related and that organisms have become more complex over time. Which phrase desc

ribes a theory
Biology
1 answer:
Dominik [7]2 years ago
3 0
<span>The best explanation of observations and data.
The theory of evolution states that all life is related and that organism have become more complex over time is the theory that uses observation and data for it to be proven.</span>
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As filtrate moves through the ______________in mammals, it generally undergoes a dramatic decrease in osmolarity.
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As filtrate moves through the Ascending segment of the loop of Henle in mammals, it generally undergoes a dramatic decrease in osmolarity.

The ascending limb of the loop of henle is direct continuation from descending limb of henle, one of the structure in the nephron of the kidney.This segment  of ascending limb has thin and thick segment.

The descending loop leads to sharp bend, in which ascending loop continues.This loop has thin and thick portion. Thick ascending limb is called distal straight tube. Thin-segment is permeable to ions and impermeable water.25% of sodium and potassium is absorb by the wall of ascending limb of the loop of henle.

To learn more about osmolarity here

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2 years ago
What is the most common immediate impact of floating plastic on marine mammals?
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Plastic also takes up to 1000 years to biodegrade and marine life can become entangled is trash in the ocean and possibly die if they are not rescued quick enough(i want to be a marine biologist and help same marine life) 
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B

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Why does food nood to be digested?
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What are the two different results of a lack of calcium and a lack of atp?
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<span>There are numerous proteins in muscle. The main two are thin actin filaments and thick myosin filaments. Thin filaments form a scaffold that thick filaments crawl up. There are many regulatory proteins such as troponin I, troponin C, and tropomyosin. There are also proteins that stabilize the cells and anchor the filaments to other cellular structures. A prime example of this is dystrophin. This protein is thought to stabilize the cell membrane during contraction and prevent it from breaking. Those who lack completely lack dystrophin have a disorder known as Duchene muscular dystrophy. This disease is characterized by muscle wasting begininng in at a young age and usually results in death by the mid 20s. The sarcomere is the repeating unit of skeletal muscle. 

Muscle cells contract by interactions of myosin heads on thick filament with actin monomers on thin filament. The myosin heads bind tightly to actin monomers until ATP binds to the myosin. This causes the release of the myosin head, which subsequently swings foward and associates with an actin monomer further up the thin filament. Hydrolysis and of ATP and the release of ADP and a phosphate allows the mysosin head to pull the thick filament up the thin filament. There are roughly 500 myosin heads on each thick filament and when they repeatedly move up the thin filament, the muscle contracts. There are many regulatory proteins of this contraction. For example, troponin I, troponin C, and tropomyosin form a regulatory switch that blocks myosin heads from binding to actin monomers until a nerve impulse stimulates an influx of calcium. This causes the switch to allow the myosin to bind to the actin and allows the muscle to contract. </span><span>
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