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Question 1

What percentage of species on planet earth live in the ocean?

Answer 1

15%

Question 2

What are the 3 advantages of living in the ocean?

Answer 2

more space/ no desiccation / conditions are more stable

Question 3

What are the 4 disadvantages of living in the ocean?

Answer 3

Lack of: dissolved nutrients, dissolved gasses, light, and hydrostatic pressure

Question 4

which animal is the closest relative to reptiles?

Answer 4

Birds

Question 5

What are the 4 reasons that the oceans are NOT home to the most diverse life on the planet? (why doesn’t the ocean have more species than land?)

Answer 5

1. Fragmentation leading to geographical isolation
2. Lack variation so no selective pressures
3. Light and scent don’t travel well - not a lot of sexual dimorphism
4. No flowering plants meaning no insects meaning less species