Which is not a pathway by which plants obtain nitrogen in a usable form?
A chemical fertilizers
B lightning
C photosynthesis
D symbiotic bacteria

C. Photosynthesis

Explanation:

Nitrogen is an important elemental component needed for plant's growth and development. However, plants obtain this Nitrogen in various ways including chemical fertilizers, symbiotic bacteria and lightning.

Plants, via their roots, may absorb nitrogen in the usable form, from applied fertilizers. They can also derive nitrogen compounds (nitrates) by forming symbiotic relationship with nitrogen-fixing bacteria in the soil. Lightning is also a source of atmospheric nitrogen, which is converted to a usable form by nitrogen-fixing bacteria.

However, plants perform PHOTOSYNTHESIS to produce sugars (glucose) and not nitrogen.

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

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