Which phylum of worms includes the leeches?
A) Flatworms
B) Annelids
C) Roundworms
D) None of the above
B
Biology & Microbiology
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Moist heat sterilizes by
A. denaturing proteins. B. causing production of singlet oxygen. C. causing the formation of thymine dimers. D. All of the choices are correct.
Biology & Microbiology
Most bacterial phyla lack strong phenotypic cohesiveness
Indicate whether the statement is true or false.
Biology & Microbiology
The organelle that best enables an athlete's tissues to be metabolically active are
A. ribosomes. B. lysosomes. C. smooth endoplasmic reticulum. D. mitochondria. E. contractile vacuoles.
Biology & Microbiology
An owl and a hawk both eat mice. Which of these terms describes the relationship between a hawk and an owl?
A) predation B) competition C) parasitism D) herbivory E) mutualism
Biology & Microbiology