*Question*
Q: What are composed of alternating positive and negative ions? Read this paragraph and choose the correct option from the provided answers: Ionic crystals are composed of alternating positive and negative ions. Choices: - magnetic crystals - polar bonds - radioactive substances - ionic crystals A:
**Answer**
ionic crystals

*Question*
Q: How do organophostbate pesticides work? Read this paragraph and choose the correct option from the provided answers: Choices: - inhibiting reticulum - inhibiting cryptosporidium - inhibiting testosterone - inhibiting acetylcholinesterase A:
**Answer**
inhibiting acetylcholinesterase

*Question*
Q: In seedless vascular plants such as ferns, the sporophyte releases spores from the undersides of what basic plant structures? Read this paragraph and choose the correct option from the provided answers: In seedless vascular plants such as ferns, the sporophyte releases spores from the undersides of leaves. Choices: - roots - fruits - stems - leaves A:
**Answer**
leaves

*Question*
Q: What kind of parasites are nearly all ticks that live on the body surfaces of reptiles or mammals? Read this paragraph and choose the correct option from the provided answers: Choices: - helminths - protozoa - ectoparasites - bloodsucking A:
**Answer**
bloodsucking