Which is part of the spindle apparatus?
question 11 options:

aster fibers

centromere

chromatin

nuclear envelope

Chromatin is a part of the spindle apparatus

Explanation:

Chromosome is not only responsible for genetic material.  Chromatin is that substance which consists of protein and DNA.  Here DNA carries genetic instruction. Histones are main proteins of chromatin. It is also called the packaging of element for the DNA.

In two forms chromatin exist. One is euchromatin and another is heterochromatin. Euchromatin is less condensed and it can be transcribed. Heterochromatin is highly condensed and typically not transcribed. Chromosomal pathway regulates spindle assembly.

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

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