This is
1. in a hot-water heating system, room temperature is controlled by a device called
2. heat engines convert which type of energy into mechanical work?
a. chemical
b. nuclear
c. thermal
d. elastic
3. how are internal combustion engines different from external combustion engines? give examples of both types of engines.

Which entry is in the wrong position in the table?

If the nucleus of a cell was removed the cell wouldn’t be able to make proteins because

1. in a certain species of plant, the color purple (p) is dominant to the color white (p). according the punnett square, what is the probability of and offspring being white? 50%25%0%100% 2. in a certain species of plant, the color purple (p) is dominant to the color white (p). according the punnett square, what is the probability of and offspring being white? 0%100%50%25%(picture 1 is for question 1, and picture 2 is for question 2)