Answer:
B
Explanation:
About 54O mil years ago the Camberian Explosion happened and in Camberian period major animal phyla appear according to fossil records.
A theory and a hypothesis began as educated guesses that were proved to be atleast partly true however a theory has extensive testing behind it.
Dinoflagellates are a type of algae that live in a symbiotic relationship with the coral. The algae are autotrophic, meaning they can convert the energy of the sun into chemical energy that organisms can use. The algae share some of the nutrients they produce with the coral in exchange for coral's protection.
if the algae die off, the coral loses an important source of nutrients and dies too.
Answer:
a
Explanation:
i just took it on usatestprep
Answer:
A number of human activities can impact on the water cycle: damming rivers for hydroelectricity, using water for farming, deforestation and the burning of fossil fuels
Explanation: