What type of species has an impact on the ecosystem that is
greater than its numbers?
A. a keystone species
B. a non-native species
C. an invasive species

Which of the following will not cause mass extinction? a. drastic change is weather b. geological change c. both a and b d. none of the above

What is it called when plants lose water though their leaves

Some plants rely on the wind to reproduce an example is it’s important for plants to use the forces of nature to reproduce because 1. 1a white tuft of dandelion seeds 2a spiked burrs surrounding seeds 3a hard shell on a walnut? 2. 1b require pollination to reproduce 2b reproduce only asexually 3b cannot move about freely?