There are bacteria, like the Pseudomonas fluorescens and Marimonas protea, that can reside even in frozen surfaces. They do it by entering a dormant state where they wait patiently to be free from ice and grow again.
Bacterial adaptation to cold surroundings also involves changes in their membrane composition and translation and transcription machinery. This includes bacterial conjugation.
The answer is A.
Well... if the predator would become extinct, the population of the hunted will grow and reproduce. There for it would increase.
The shown lipid is a saturated triglyceride.
A type of lipid is known as a triglyceride which is an ester derived from glycerol combined with three fatty acid molecules.