Q: What are the two methods in which mutations arise in dna? Choices: - produced or spontaneous - accelerated or spontaneous - accelerated or random - induced or spontaneous A:
induced or spontaneous

Q: What cage composed of 12 pairs of ribs, with their costal cartilages and the sternum, protects the heart and lungs? Choices: - sacral - lumbar - cervical - thoracic A:
thoracic

Q: Q: What consists of thylakoid membranes surrounded by stroma? Choices: - a photon - a nucleus - a stem - a chloroplast A:
A: a chloroplast

Question: Q: In what part of the lungs is pulmonary gas exchanged? Choices: - bronchioles - trachea - bronchi - alveoli A:
Answer: alveoli

*Question*
Q: Snow and rain are forms of what weather? Choices: - sediment - evaporation - cold fronts - precipitation A:
**Answer**
precipitation

(Q).
Q: Water behind a dam has potential energy. moving water, such as in a waterfall or a rapidly flowing river, has this? Choices: - residual energy - thermal energy - compression energy - kinetic energy A:
(A).
kinetic energy