(Q).
Cells secrete acids and bases to maintain the proper pH for enzymes to work, and most human enzymes work at a optimal pH of 7.4, but other enzymes work at many different pH ranges. Given these facts, cells secrete acids and bases to maintain what among the following options: - Chemical energy  - resistance  - increases a body's strength  - To keep their body heat.  - most human enzymes  - aerobic capacity  - allow growth  - temperature
(A).
most human enzymes


(Q).
Telephones are used for communication by two people by transmitting sound, and when a wave is audible, it is called a sound wave . Given these facts, telephones are used for communication by transmitting what among the following options: - encoded information  - Electrical energy  - music  - chemical messengers  - telephone messages  - audible waves  - pictures  - electricity
(A).
audible waves


(Q).
Condensing causes a liquid to form, and air carries moisture that can condense. Given these facts, air carries moisture that causes a what to form among the following options: - expand  - watershed  - flooding  - root  - a solute  - liquid  - cracks  - rainfall
(A).
