Lighting and some bacteria "fix" free nitrogen gas. Which of the following best describes nitrogen fixation

See the answer below

Explanation:

Nitrogen fixation is a process during which free atmospheric molecular nitrogen is converted into biologically usable forms such as ammonia, nitrates, and nitrites. The fixation of nitrogen is naturally carried out in two ways:

1. Direct conversion of molecular nitrogen to nitrates and or ammonia during lightning. The converted compound is washed into the soil by rain and becomes available to plants for uptake.

2. Biological nitrogen fixation: This involves the conversion of nitrogen to ammonium compounds by nitrogen-fixing bacteria that are usually associated with the root nodules of leguminous plants. The compounds thus formed become available for plant use.

Nitrogen can also be artificially fixed into nitrogen-rich fertilizers through various industrial processes. The fertilizers are applied to plants and get into the nitrogen cycle from thereon.

answers are:

lysogenic     viral dna merges with host cell dna

lysogenic     no symptoms

lytic               viral dna takes over

lysogenic     virus does not destroy host cell

lytic               virus destroys host cell

lytic               induces symptoms of viral infection

lysogenic       cell reproduces and spreads provirus

interphase

the period of cell growth when the cell synthesizes new molecules and organelles. the cell is not dividing and it constitutes the majority of the time spent in the cell cycle

prophase

changes occur in the nucleus and cytoplasm. the chromatin condenses to form structures (sister chromatids) visible with a light microscope and the mitotic spindle begins to form, but the nucleus is still in tact

prometaphase

the nuclear envelope fragments and the spindle microtubules attach to the kinetochores of the sister chromatids

metaphase

all the cell's duplicated chromosomes are lined up at an imaginary plane equidistant between the poles of the mitotic spindle

anaphase

begins when sister chromatids separate from each other and ending when a complete set of daughter chromosomes arrives at each of the two poles of the cell

telophase

the daughter nuclei form at the two poles of a cell

cytokinesis

the division of a cytoplasm to form two separate daughter cells. usually occurs during telophase during mitosis. this and mitosis make up to mitotic (m) phase of the cell cycle