Which of the following are monocot features?

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#Question id: 8923

#XL - R Botany

Which of these genetic processes may be most helpful in accounting for the Cambrian explosion?

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#Question id: 8924

#XL - R Botany

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: 8925

#XL - R Botany

What is the probable sequence in which the following clades of animals originated, from earliest to most recent?

1. tetrapods

2. vertebrates

3. deuterostomes

4. amniotes

5. bilaterians

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#Question id: 8925

#XL - P Chemistry

What is the probable sequence in which the following clades of animals originated, from earliest to most recent?

1. tetrapods

2. vertebrates

3. deuterostomes

4. amniotes

5. bilaterians

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#Question id: 8926

#XL - R Botany

Sponges and cnidarians are among the fossilized animals found in both the Ediacara Hills and the Burgess Shale from the Rocky Mountains of British Colombia. This observation requires that

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#Question id: 8927

#XL - R Botany

Arthropods invaded land about 100 million years before vertebrates did so. This most clearly implies that