What is the purpose of the Durham tube?

What will be an ideal response?


Ans: Durham tubes are used in microbiology to detect production of gas by microorganisms. They are simply smaller test tubes inserted upside down in another test tube. This small tube is initially filled with the solution in which the microorganism is to be grown.

Biology & Microbiology

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You construct a life table for a plant species and find that in all cases about the same proportion of the cohort survive to the beginning of the next time interval. What would you call this? 

A. a Type I survivorship curve B. a Type II survivorship curve C. a Type III survivorship curve D. a semelparous life history adaptation E. populations regulated by density-independent events

Biology & Microbiology

Stable annealing due to hydrogen bonding between DNAs of similar nucleotide sequence from different organisms is referred to as ________.

A. hybridization B. hydrolysis C. restriction D. ligation

Biology & Microbiology

Human height is a trait affected by both genes and the environment. How is this so?

What will be an ideal response?

Biology & Microbiology

Diagram the life cycle of a pine. What will be an ideal response?

Biology & Microbiology