Q: Because of the wave character of matter, the idea of well-defined orbits gives way to a model in which there is a cloud of what? Choices: - particles - mutation - chaos - probability A:
probability

(Question)
Q: Action potentials occur whenever a depolarization increases the membrane voltage to a particular value called what? Choices: - velocity - ohms - fraction - threshold A:
(Answer)
threshold

Ques: Q: What forms when a solute dissolves in a solvent? Choices: - chemical - gas - liquid - solution A:
Ans: solution

(Q).
Q: The cell wall acts as an extra layer of protection, helps the cell maintain its shape, and prevents what? Choices: - extinction - exhaustion - Respiration - dehydration A:
(A).
dehydration

Ques:Q: What is the period from earth's origin to the beginning of the phanerozoic eon? Choices: - Paleolithic - Cenozoic - anatolian - precambrian A:

Ans:precambrian

Q: What is the name of the command center of the cell? Choices: - mitochondria - molecules - vacuole - nucleus A:
nucleus