Describe the relationship between bird species richness and tree species richness

Species richness is related to the number of species living in a particular community. More the number of species present in a community more will be its species richness.  

Trees provide the natural habitat for most of the birds living in this world so a higher tree species richness can provide a wide range of natural habitat for bird species.

Different species of birds rely on different source of food to reduce competition so a high species richness of trees can provide a different source of food which can support high species richness of birds.

Therefore there is a positive relationship between bird species richness and tree species richness.  

they may bind directly to special “promoter” regions of dna, which lie upstream of the coding region in a gene, or directly to the rna polymerase molecule.

enhanced global partnerships and exploration capabilities may advance international preparedness for protecting the earth from catastrophic events such as some asteroid strikes, advancing collaborative research on space weather and protecting spacecraft by developing new means for space debris removal.