46. The system handles gas exchange in the body……….
A. Respiratory
B. Lymphatic
C. Excretory
D. Muscular

The population of bacteria in a petri dish doubles every 40 seconds. the population of the bacteria is initially 400 organisms. what unit is most appropriate for the time at which the number of bacteria is 300? hour bacteria per hour second bacteria per second

Why do you think water is so important to living things

Ais a landform that is formed at the mouth of a river from the deposition of sediment carried by the river as the water flows.