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harina [27]
3 years ago
14

Which of the following has a knot of nerve tissue at its head end?

Biology
1 answer:
marissa [1.9K]3 years ago
8 0
Worms would be the best answer.
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PLEASE HELPP. SEE ATTACHMENT BELOW↓
alekssr [168]

Answer:

The answer is parable  A

Explanation:

Its the only one that made sense in my eyes some of them didn't even match the topic.

4 0
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In the 1930s AAS were synthesized and are recently used as a therapeutic medicine to stimulate muscle growth, increase appetite, induce puberty in males and treat wasting conditions among cancer and AIDS patients. It was also acknowledged by the American College of Sports Medicine that AAS, when joined with an adequate diet, can contribute to increasing the body weight, often as lean mass increases and the gains in muscular strength are achieved by doing high-intensity workout and proper diet.


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2 years ago
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P680 is said to be the strongest biological oxidizing agent. Given its function, why is this necessary
mylen [45]

Answer:

The correct answer is - it obtains electrons from the oxygen atom in a water molecule, so it must have a stronger attraction for electrons than oxygen has

Explanation:

P680 known as which contains a reaction center in photosystem two, it is a very strong oxidizing agent that catalyzes the transfer of electrons from H2O to a bound quinone, with the production of O2.

To have a stronger attraction for electrons than oxygen has, P680 gets electrons from the O2 atom in a water molecule.

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What effect does human activity have on many ecosystems?
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Dirt hope this helped
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