__________ are asymmetrical and do not have tissues or organs.
Fill in the blank(s) with the appropriate word(s).
Sponges
Biology & Microbiology
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Atmospheric nitrogen is
A. used directly by plants. B. used directly by animals. C. turned into ammonia by microorganisms. D. directly used to make carbohydrates
Biology & Microbiology
Community structure is a result of ____ interactions
a. atypical b. factorial c. only positive d. only negative e. positive and negative
Biology & Microbiology
Which postzygotic barrier do mules illustrate?
a. temporal isolation b. hybrid inviability c. hybrid breakdown d. gametic isolation e. hybrid sterility
Biology & Microbiology
The photosynthetic reaction is considered an endergonic reaction
Indicate whether the statement is true or false
Biology & Microbiology