Multiple choice Daytime temperatures on Mercury are extremely hot because:

1. it is close to the sun
2. it has long days
3. one side is facing the sun
4. it gives off internal heat
5. there are volcanoes

the answer is d. chordata

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.

the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.