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: 2392

#XL - Q Biochemistry

Thylakoids, DNA, and ribosomes are all components found in ________

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#Question id: 2393

#XL - Q Biochemistry

Where are proteins produced other than on ribosomes free in the cytosol or ribosomes attached to the endoplasmic reticulum?

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#Question id: 2394

#XL - Q Biochemistry

Cyanide binds with at least one molecule involved in producing ATP. If a cell is exposed to cyanide, most of the bound cyanide is likely to be localized within the ________.

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#Question id: 2395

#XL - Q Biochemistry

Which structure is not part of the endomembrane system?

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#Question id: 2607

#XL - R Botany

The precursor amino acid + enzyme of trp is ;

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#Question id: 2625

#XL - R Botany

positive regulation is applied when