Recent metagenomic investigations reveal that human microbial flora is extremely diverse and is best described a

Beneficial and harmful microbial flora

Explanation:

Human microbial flora is extremely diverse and is best described as beneficial and harmful microbial flora because some microbial flora are good for living organisms and environment while others are harmful means causes damage to organisms and the environment. Microbial flora refers to those microorganisms which have similar characteristics to plants. Some examples of microbial flora are Staphylococcus epidermidis, Corynebacterium spp, Streptococci and Neisseria spp etc.

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.

well first you need the sample of the temperature and gas level. i couldnt write a hypothesis unless i had some data. i think temperature changes will effect volumes of gas because gas changed into a solid or liquid at specific temperatures.