Question

Question 1 1 pts 1. You are classifying an organism based on the environment in which it was found. Select all that help classify the organism. This organism was found in the Dead Sea, known for its high salinity at 33% salt, and an average temperature of 25 degrees Celsius. The pH of the sea water was measured at 5.8. mesophile psychrophile hyperthermophile a obligate halophile facultative halophile acidophile neutrophile alkaliphile

Answer 1

This organism is a mesophile because it can grow at an average temperature of 25 degrees celsius and optimum temperature range for mesophiles is 20 derees celsius to 45 degrees celsius.

Psychrophiles grow at 0 degrees celsius and below and optimum growth temperature for them is 20 degrees celsius hence this option is not correct.

Hyperthermophiles grow at temperature above 50 degrees celsius hence this option is also not correct.

Obligate halophiles are the organisms which can grow in high salt concentration only and this organism grow in dead sea with 33% salt concentration hence it is obligate halophile.

Facultative halophiles are the organisms which donot require high salt concentration for growth but can grow in a saline environment with 2% salt concentration. Hence this option is also incorrect.

The organism grows at a pH of 5.8 hence is neutrophile and is neither an acidophile which grows at a pH below 3 nor an alkaliphile which survives in alkaline pH around 8.5 to 11.

Hence it can be summarised that the organism found in Dead Sea can be classified as mesophile,obligate halophile and a neutrophile.