2/9/2021 Chapter 8 Test
13.
9. Which activity that increases the genetic variation within a population of earthworms?
Mark only one oval.
Binary fission
Sexual reproduction
001
Budding
Fragmentation
14.
10. In sexual reproduction
two arant

sexual reproduction

Explanation:

It is secusl reproduction because it increases genetic variation

yes it is weird but true

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.