Q: The simplest example of what type of 'organ system' is the gastrovascular cavity found in organisms with only one opening for the process? A:
OPTIONS:
- cardiovascular
- respiratory
- nervous
- digestive

Answer: digestive

Question: Q: What is the enclosed, fluid-filled membrane that surrounds and protects the fetus and is attached to the placenta? A:
OPTIONS:
- epithelial sac
- umbilical sac
- womb
- amniotic sac
Answer: amniotic sac

input with options: Q: Tropomyosin is a type of what, that winds around the chains of the actin filament and covers the myosin-binding sites to prevent actin from binding to myosin? A:
OPTIONS:
- enzyme
- bacteria
- amine
- protein
output: protein

Q: Q: Group 15 of the periodic table is also called which group? A:

OPTIONS:
- oxygen
- potassium
- hydrogen
- nitrogen

A: nitrogen

input: OPTIONS:
- shale
- coal
- magma
- very thick oil Now, answer this question: Q: Tar sands are rocky materials mixed with what? A:
A:
output: very thick oil

Question: Q: In vertebrates, a system of what structures attached to the endoskeleton enables movement? A:
OPTIONS:
- nerves
- tendons
- tissues
- muscles
Answer:
muscles