Briefly describe what is meant by a pioneer species
What will be an ideal response?
Pioneer species are among the first to colonize a new substrate after a severe disturbance that creates the conditions for primary succession. Pioneer plant species usually have airborne dispersal mechanisms such as windblown seeds or spores or floating propagules for coastal ecosystems. Pioneer species such as lichens or mangroves begin the process of soil formation, paving the way for other vegetation and eventually animals to establish. Pioneer animal species would include flying or windborne insects and small birds.
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All needleleaf trees are evergreen
Indicate whether the statement is true or false
Carolus Linnaeus proposed that organisms be classified using a two-part Latin name, including
genus and species. Indicate whether the statement is true or false.
A basin in which water leaves via evapotranspiration or subsurface gravitational flow instead of reaching the ocean is said to have
A) a disappearing stream. B) sheetflow. C) a closed system. D) internal drainage.
Acid mine drainage ____
a. often raises the pH of local streams b. is a problem in many of the coal-mining regions of the eastern United States c. is primarily related to mining salt from the waters of the Great Lakes d. is a procedure developed to reduce chemical pollutants in streams