<span> There are so many different types that come to eat and as I watch them I notice that some of the finches look very much alike but are different breeds. You can look at the shape of a bird's body, wingspan, colors especially and markings and determine the type of bird, if it is native to your area or visiting, if it is male or female. I have a bird book I like to use, it's called, wild birds of north America. It has tons of color photos and info. If you want to draw lots of interesting birds, try a thistle feeder instead of mixed wild bird seed. This will draw in the finches and other colorful small birds that you don't see flying around that often.</span>
Answer:
an association between two organisms in which one benefits and the other derives neither benefits nor harm
Explanation:
A frog using a plant as protection
Gas chromatography (GC) is a method of separating mixed compounds.
The separation will depend on each compound's retention time. Compounds with
higher molecular weights will elute out slower than those with lower molecular
weight. This is due to their difference in boiling points. The larger the
structure, the higher the boiling point.
<span />
Explanation:
After repeated stimulation by antigen, B cells can make antibodies that bind their antigen with much higher affinity a process called affinity maturation. ... Thus, antigen stimulation greatly increases the antibody arsenal. Antibodies are proteins, and proteins are encoded by genes.
