Events & Promotions
| Last visit was: 01 Jun 2026, 13:42 |
It is currently 01 Jun 2026, 13:42 |
|
|
Customized
for You
Track
Your Progress
Practice
Pays
10:00 AM PDT
-11:00 AM PDT
10:00 AM EDT
-11:59 PM EDT
10:00 AM IST
-11:00 PM IST
12:30 AM EDT
-01:30 AM EDT
01:00 AM EDT
-02:00 AM EDT
03:00 PM PDT
-04:00 PM PDT
06:00 AM PDT
-06:15 PM PDT
Difficulty:
Question Stats:
91% (01:16) correct
9%
(01:24)
wrong
based on 559
sessions
History
| Phylum | Circulatory System | Cephalization | Body Cavity | Segmentation |
|---|---|---|---|---|
| Annelida | yes | yes | yes | yes |
| Arthropoda | yes | yes | yes | yes |
| Chordata | yes | yes | yes | yes |
| Cnidaria | no | no | no | no |
| Echinodermata | no | no | yes | no |
| Mollusca | yes | yes | yes | no |
| Nematoda | no | yes | yes | no |
| Platyhelminthes | no | yes | no | no |
| Porifera | no | no | no | no |
| Yes | No | |
| Of the phyla that exhibit cephalization but not a circulatory system, only one exhibits a body cavity. | ||
| Of the phyla without a body cavity, none exhibit any of the three other listed characteristics. | ||
| The phyla that exhibit segmentation exhibit all of the other characteristics as well. |
Success stories and strategies from high-scoring candidates.