Author Question: Most marine organisms have an internal temperature very close to that of their surroundings. They ... (Read 140 times)

rl · **on:** Aug 22, 2018

Most marine organisms have an internal temperature very close to that of their surroundings. They are known as ____ organisms.
A) poikilothermic
B) endothermic
C) homeothermic
D) ectothermic

Question 2

What are the three most valuable marine resources? How are they excavated from the ocean? Are these resources renewable or nonrenewable?

randomguy133 · **Reply #1 on:** Aug 22, 2018

Answer to Question 1

D

Answer to Question 2

The most valuable resource in the ocean and on land is crude oil and natural gas. These are nonrenewable resources made from organisms that broke down into simple carbohydrates over time in areas with low oxygen levels.
Oil is excavated by drilling. Most of the oil platforms are relatively near to the shore. The deeper the drilling, the more difficult and costly it becomes.
Sand and gravel are the second most valuable resources. Solid deposits are considered to be nonrenewable. Sand can be suction-dredged onto temporary islands before being shipped to various locations worldwide.
The magnesium and magnesium compounds are the third most valuable resource the ocean has to offer. These can be collected by using chemical reactions or electricity. The magnesium is extracted from the brine.