Answer:
In nature, there are a number of useful soil micro organisms which can help plants to absorb nutrients. Their utility can be enhanced with human intervention by selecting efficient organisms, culturing them and adding them to soils directly or through seeds. The cultured micro organisms packed in some carrier material for easy application in the field are called bio-fertilisers. Thus, the critical input in Biofertilisers is the micro organisms.
With the help of xylem which is present in plants
The answer is D! birds have to migrate for winter to find an abundance of food! they learned this over time making it a learned adaptation
Answer:
Positive or negative effects.
Explanation:
Chromosomal changes is called mutation.
Mutation is change or alterations in genetic constituents or chromosomes of an organisms.
Not all chromosomal changes are negative or causes genetic disorder bit some have positive effects too.
The negative effect causes some genetic disorders but the positive don't have negative impact on health but only the chromosomal sequence might be alter , it functions is still intact.