*Question*
If some strange life forms have an envelope of phospholipids and proteins, then some strange life forms have an envelope of what? Answer choices: - Chemical energy - biological diversity - Something coming from a gland - layers of fat - characteristics - phospholipids and proteins - Positive charges - visible energy
**Answer**
phospholipids and proteins

*Question*
If acatalyst can lower the energy cost of a chemical reaction, then in what way does a catalyst help in chemical reactions? Answer choices: - Generating heat - lowered energy cost - metabolic reaction - heating liquids - by making heat - adding heat - increases a body's strength - preventing heat transfer
**Answer**
lowered energy cost

*Question*
If abreathing mask can be used for keeping out sulfate particles, then what is one thing a breathing mask can protect you from? Answer choices: - sulfate particles - enormous damage to homes - massive damage - too much air - Dehydration - electromagnetic radiation - choking on food - influenza
**Answer**
sulfate particles

*Question*
If epiphytes live everywhere on earth, then where do epiphytes live? Answer choices: - swamp vegetation - mountains - vegetation - the environment - peachleaf willow - ice - rocks - everywhere on earth
**Answer**
everywhere on earth