Problem:OPTIONS:
- hydrogen and nutrients
- acid and nutrients
- fluid and nutrients
- oxygen and nutrients

Q: The vertebrate circulatory system enables blood to deliver ________ and remove wastes throughout the body. A:
****
A: oxygen and nutrients

Q: What are the two major types of seed plants called? A:
OPTIONS:
- perennials and annuals
- flowers and fruits
- deciduous and evergreen
- gymnosperms and angiosperms
gymnosperms and angiosperms

Q: When atoms gain or lose electrons, what is formed? A:
OPTIONS:
- crystals
- molecules
- gas
- ions

Answer: ions

Question: Q: What are unsaturated hydrocarbons with at least one double bond between carbon atoms called? A:
OPTIONS:
- amines
- enzymes
- peptides
- alkenes
Answer: alkenes

input with options: Q: The innermost layer of the sun is known as what? A:
OPTIONS:
- photosphere
- surface
- convective zone
- core
output: core

Problem: OPTIONS:
- germination dormancy
- seed forcing
- survival dormancy
- seed dormancy
Q: Q: What ensures that seeds germinate only when conditions for seedling survival are optimal? A:
Answer:
seed dormancy