Heterocyst-forming cyanobacteria differentiate highly specialized cells to provide fixed nitrogen to the vegetative cells in a filament. In the presence of a source of combined nitrogen such as nitrate or ammonium, Anabaena PCC 7120 grows as long filaments containing hundreds of photosynthetic vegetative cells.
Answer:
a) Homozygous
Explanation:
An organism in which the two copies of the gene are identical is called homozygous in that gene. An organism with two different alleles of the genes is called heterozygous.
A hypothesis can become A. a scientific theory if it is supported by repeated experimentation.
Shark,big fish, small fish,algae,plankton hope this helped
Explanation:
nerves that emerge directly from the brain. Cranial nerves relay information between the brain and parts of the body, primarily to and from regions of the head and neck.
