Which of the following is considered to be a pioneer species during

secondary succession (there are 2 possible answers) ? *

grasses

mosses

bushes

O

trees

What causes a land breeze at the beach?

How can adding fertilizer to an ecosystem cause damage?

Which of the following pairs of vertebrate classes are most like each other? A) birds and fish B) reptiles and mammals C) amphibians and reptiles D) fish and mammals

What gene pair consisting of dominant allele and reccesive allele

The disappearing of bees and other pollinating insects is often used as a sign that an ecosystem is becoming unstable. Why are bees an important indicator of ecosystem health?

An increase in a herbivore populations in an ecosystem will soon lead to

This aquatic area is one of the most productive on Earth. More organic matter is created ere each year than comparably-sized areas of forest, grassland, or agricultural land. This body of water is a (n) A) estuary. B) lake. C) river. D) swamp.

The type of relationship described could best be classified as one of

What term defines a gene made up of two different alleles

Factors that can alter the level of expression of a gene include