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ohaa [14]
2 years ago
14

During the ____, all but one of the major marine phyla appeared. Question 1 options: Cambrian explosion Antler Orogeny Caledonia

n Orogeny Ouachita Orogeny
Biology
1 answer:
Zanzabum2 years ago
7 0

Answer:

Cambrian explosion

Explanation:

Cambrian explosion is a geological event that happened during the Cambrian age (541 million years ago). In this period, most of the animal phyla (including marine) appeared and their geological record is preserved in the form of fossils. The period lasted for 13-25 million years. Before this period, the organisms were very simple. They were mostly unicellular in nature and were living in the form of colonies.

The remaining three options are incorrect. They are tectonic events that reflect movement of continents in different geological times. None of them resulted in the diversification of (marine) animal phyla.

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after a power stroke, the myosin head must detach from acting before another powerstroke can occur. what causes
kompoz [17]

The myosin head separates from actin as a result of ATP binding. The intrinsic ATPase activity of myosin then transforms ATP into ADP and Pi. The myosin head's angle is altered into a cocked state by the energy generated during ATP hydrolysis. The myosin head is now ready to move in the future.

The myosin protein is in a high-energy conformation when the head is cocked. At the end of the power stroke, the myosin head is in a low-energy position because this energy has been used up during the power stroke. ADP is released following the power stroke, but the cross-bridge is still there and actin and myosin are joined together.

Since ATP is readily available, the cross-bridge cycle can repeat, and muscular contraction can go on as long as ATP is there.

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1 year ago
What happened to the matter and the energy that were in the watermelon as it decomposed.
vitfil [10]

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5 0
3 years ago
45 POINTS IF CORRECT
katrin [286]

Answers

When doing medical research with human subjects, the following are unavoidable limitations;

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3 years ago
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mamaluj [8]

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3 years ago
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