which type of organism in this lab gets its nitrogen from nitogen fixation allowing it to grow even if easily used forms of nitrogen are not availble in its water or food

Cyanobacteria

Explanation:

Cyanobacteria (also known as blue-green algae) are a group of prokaryotic organisms composed of photosynthetic bacteria. Cyanobacteria are important in the nitrogen cycle. Some cyanobacteria are capable of fixing atmospheric nitrogen into organic compounds such as, for example, nitrate or ammonia. Subsequently, plants can use these nitrogen sources to grow, which they obtain from the soil. The process of nitrogen fixation (nitrification) is produced in anaerobic conditions by specialized nitrogen-fixing cells called heterocysts.

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus

they fuse to form they have half as many chromosomes as a somatic cell of the same individual. b