In marine environment Carbonate Compensation Depth (CCD) is de-fined as depth at which:

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#Question id: 4947

#11. Evolution and Behavior

The first genes on Earth were probably

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#Question id: 3009

#2. Cellular Organization

 Endospores are

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#Question id: 5027

#11. Evolution and Behavior

Fossil evidence indicates that the following events occurred in what sequence, from earliest to most recent?

1. Protostomes invade terrestrial environments.

2. Cambrian explosion occurs.

3. Deuterostomes invade terrestrial environments.

4. Vertebrates become top predators in the seas.

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#Question id: 1060

#4. Cell Communication and Cell Signaling

If the infecting phage lacks some critical pieces of DNA necessary for replication, it is called

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#Question id: 19200

#12. Applied Biology

What kind of biosensors uses ion-selective electrodes to convert the biological reaction into electronic signal?