Which is not a reservoir for chemicals in an ecosystem?

  Complete the statement with the appropriate directional term.   L is _________ to K.

______________ is a species that has a large effect on its environment relative to its abundance, playing a critical role in maintaining the structure of an ecological community.

The Ozone Layer in the atmosphere blocks a large amount of ultra violet light.  If holes appeared in the Ozone Layer what would most likely happen?

Which factor does not cause increased biodiversity at the equator?

This important aspect of life history measures material and energetic contribution that an individual will make to its offspring.

Mycorrhizae is a beneficial relationship between plant roots and fungus.  Plants provide the fungus with _____________ and the fungus provide the plant roots with _______________.

Why might Angiosperms have evolved after animals colonized land?  (Should only take a couple sentences to answer. /  4 points)

______________ are organisms that live in or on other organism (the host) and cause damage to the host.

Why might a flower lack petals?