exam 4 ch 18.5

Question 1

Ordovician ocean species radiate, fish diversification, and the first jawed fish

Answer 1

silurian:

Question 2

Oldest millipede fossil

Answer 2

425Ma

Question 3

Oldest Arachnid fossils indicate a predatory food web had been established

Answer 3

420Ma:

Question 4

First land plants (Embryophytes) evolved tissues (Xylem &
Phloem) to transport water & nutrients from deeper roots to higher tissues

Answer 4

433 to 393 Vascular land plant fossils:

Question 5

Fungi fossils including Prototaxites,
which was 3 feet wide & 26 feet tall

Answer 5

440-420Ma Giant fungi:

Question 6

Following Ordovician extinctions, surviving Eurypterids, Crinoids,
Brachiopods, Ostracoderms slowly speciate, refilling niches lost during Ordovician extinctions

Answer 6

443-419Ma Oceans Diversity:

Question 7

Straight shelled nautiloids evolve coiled shells

Answer 7

435-419Ma Ammonoids evolve:

Question 8

The jawed fish evolve by adapting the supports of the front gill
arches into jaws

Answer 8

439Ma First Gnathostomes fossils:

Question 9

Phylogeny suggests jawed fish evolved during the Ordovician.

Answer 9

ordovician Gnathostomes?