Which of the following do all species classified in the eukaryotic clade have in common?
OA.
Their cells all contain a membrane-bound nucleus.
OB.
Their cells all have a rigid cell wall.
OC.
They are all able to move around their environment.
OD.
They are all able to perform photosynthesis.

OA.

Their cells all contain a membrane-bound nucleus.

Explanation:

it can not be the option B because not all eukaryotic species have a cell wall, animals for example.

In option C plants are eukaryotic, but they are stuck on the ground and cannot move around the environment.

option D, fungi and animals are not able to do photosynthesis, they are heterotrophs.

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.

b ti isnfornopgnoernfrof