Unit 8 Re-Test

In some coral reefs, a symbiotic relationship exists between pygmy seahorses and sea fans. The pygmy seahorse can wrap its tail around the branches of the sea fan. This allows the pygmy seahorse to be camouflaged within the sea fan, protecting it from predators. The pygmy seahorse does not harm or benefit the sea fan while it grasps the branches with its tail.

The oak mistletoe is a green leafy plant the grows on trees and has white berries. Mistletoe seeds are spread to other trees through the waste of birds that feeds on berries. The mistletoe seedlings grow into the tree to obtain water and nutrients.

This question has two parts.

Giant salvina is a floating fern native to Brazil introduced to Texas as an aquarium plant and is now found in large bodies of water across the state. The invasive plant may be carried to new bodies of water by fishing and recreational boats. It grows quickly, covering large areas of the water's surface. When the plant dies and decomposes, the oxygen content in the water declines.

This question has two parts.

Due to an increase of CO2 emissions, the weather patterns are shifting. This has caused longer dry seasons in some areas, and longer rainy seasons in others. The increase in car usage has caused there to be an extended dry season in an area, causing the majority of the ground cover dried up.