Energy Flow Through Ecosystems

AP Biology· difficulty 3/5

Nitrogen-fixing bacteria are essential because they

A
$Oxidize ammonia into nitrite forms toxic to most plant species$
B
$Convert ammonia/nitrate back into atmospheric N₂ during denitrification$
C
$Transfer fixed nitrogen from plants directly into consumer tissues$
D
$Convert atmospheric N₂ into ammonia/nitrate forms usable by plants$
check_circle

Explanation

Most organisms can't use N₂ directly. Nitrogen-fixing bacteria (free-living and symbiotic, e.g., Rhizobium) make biological nitrogen accessible.

Want 10 more like this — adaptive to your weak spots?

Related questions