Question

select all the correct answers
which two of these characteristics does an organism with bilateral symmetry possess?

lack of tissue

symmetrical in many ways across a central axis

presence of a head

development from three cell layers

Explanation:

1. Lack of tissue: Organisms with bilateral symmetry are complex and have true tissues, so this is incorrect.
2. Symmetrical in many ways across a central axis: This describes radial symmetry, not bilateral symmetry, so this is incorrect.
3. Presence of a head: Bilaterally symmetrical organisms exhibit cephalization, meaning they have a distinct head region, so this is correct.
4. Development from three cell layers: Most bilaterally symmetrical animals are triploblastic, developing from ectoderm, mesoderm, and endoderm (three germ layers), so this is correct.

Answer:

C. presence of a head
D. development from three cell layers