Answer: The symbiotic nitrogen-fixing bacteria invade the root hairs of host plants, where they multiply and stimulate formation of root nodules, enlargements of plant cells and bacteria in intimate association. Within the nodules the bacteria convert free nitrogen to ammonia, which the host plant utilizes for its development.
An area affected by an oil spill can become unhabitable for the sea birds' source of food because of toxic poisons and in turn, make it uninhabitable to the sea birds. The animals that depend on the birds for food will have fewer available options for prey and their population may lower. If the area affected by the oil spill has low biodiversity it will have a great effect on the food web.
<h2>Fluorescence in situ hybridization (FISH)</h2>
Explanation:
Fluorescence in situ hybridization (FISH) is a macromolecule acknowledgment innovation dependent on the correlative idea of DNA or DNA/RNA twofold strands.
Chosen DNA strands joined with fluorophore-coupled nucleotides can be utilized as tests to hybridize onto the corresponding groupings in tried cells and tissues and afterward envisioned through a fluorescence magnifying instrument or an imaging framework. This innovation was at first evolved as a physical mapping apparatus to outline qualities inside chromosomes.
