Q: All living things require what, which most ecosystems obtain from the sun?    Choices:  - oxygen  - water  - heat  - energy  A:
energy
Q: What is the structure in a diploid sporophyte that undergoes meiosis to form haploid spores?    Choices:  - hymenium  - dikaryotic  - hyphae  - sporangium  A:
sporangium
Q: Q: Dolphins are what type of animal?    Choices:  - reptile  - fish  - whale  - mammal  A:
A: mammal
Question: Q: What does increased temperature do to a substance's kinetic energy?    Choices:  - generates  - nothing  - decreases  - increases  A:
Answer: increases
*Question*
Q: Arteries have thinner wall layers and valves and move blood by the action of skeletal what?    Choices:  - marrow  - collagen bands  - hormones  - muscle  A:
**Answer**
muscle
Q: Q: The skeleton of lampreys is made of what?    Choices:  - ligament  - collagen  - chitin  - cartilage  A:

A: cartilage