Botulism and tetanus are caused by bacterial endospores commonly found in the soil.
Indicate whether the statement is true or false.
Ans: True.
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To meet the high oxygen demands of flight, birds _____
a. use simple lungs b. use air sacs connected to their lungs c. use carbon dioxide for respiration d. can diffuse oxygen through their skin e. use simple lungs, and can diffuse oxygen through their skin
All organisms plus the nonliving components of a defined area is a(n)
A. population. B. community. C. ecosystem. D. habitat. E. niche.
Which of the phyla of fungi is incorrectly matched with its example?
A. Ascomycota-mushrooms B. Zygomycota-bread mold C. Ascomycota-yeast D. Basidiomycota-toadstools E. Basidiomycota-rust
In a population of 100 four-o'clock flowers there are 40 red-flowered plants (CRCR), 38 pink-flowered plants (CRCW), and 22 white-flowered plants (CWCW). What is the frequency of the CW allele in this population?
A. 0.41 or 41% B. 0.52 or 52% C. 0.6 or 60% D. 0.09 or 9% E. 0.32 or 32%