Which of the following is not true about non-native species
a they can have positive impact on an ecosystem
b they can have negative impacts on the ecosystem
c if they can be introduced with in their natural range
d a non-native species can be an invasive species

This organism is not capable of performing photosynthesis. (horseshoe crab) true false

How do tides affect the organisms living in intertidal zones? a. no organisms live in intertidal zones due to the tumultuous environment. b. the mechanical forces of the waves keeps the organisms clean. c. only plants live in intertidal zones because the animals float away with the waves and never return. d. the mechanical forces of the waves can dislodge the organisms from their habitat.

Johnny rode his bike 4 blicks down the street to his friend's house once he got to his friend house and realized he could not cone out to play he turned aroubd and went back home.what is displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point