Q: Where do most ecosystems get their energy from? Choices: - earth - heat - water - sun A:
sun

Q: What property of an object is obtained by multiplying its mass and its velocity? Choices: - fluid - component - movement - momentum A:
momentum

Q: Q: Vertebrates differ from invertebrates because they lack this? Choices: - legs - head - neck - backbone or a spinal column A:
A: backbone or a spinal column

Question: Q: What is the functional unit of the kidney which actively filters blood and generates urine? Choices: - sechron - epithelial - mecrophron - nephron A:
Answer: nephron

*Question*
Q: What kind of enzyme is phosphofructokinase? Choices: - covalent - intracellular - orthosteric - allosteric A:
**Answer**
allosteric

Q: In the body, oxygen is used by cells of the body's tissues and carbon dioxide is produced as what? Choices: - oxygen - fuel - food - waste product A:
waste product