*Question*
Q: Viroids are plant pathogens much simpler than what, but like them can reproduce only within a host cell? Choices: - pests - bacteria - parasites - viruses A:
**Answer**
viruses

*Question*
Q: Which stage of development is a period during which apoptosis is widespread and plays a crucial role? Choices: - puberty - transgenic - infancy - embryonic A:
**Answer**
embryonic

*Question*
Q: What is the name for a biologist who studies fungi? Choices: - egyptologists - musicologists - oncologists - mycologists A:
**Answer**
mycologists

*Question*
Q: What is the most useful quantity for counting particles? Choices: - the coefficient - the periodic table - the vector - the mole A:
**Answer**
the mole