<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>
theory of continental drift, the world was made up of a single continent through most of geologic time. ... According to the generally acceptedplate-tectonics theory<span>, scientists believe that Earth's surface is broken into a number of shifting slabs or </span>plates<span>, which average about 50 miles in thickness....</span>
Answer:
2)
Explanation:
The positive control is the treatment where bacteria grew without lead. Since positive control indicates the presence of bacteria in the experimental conditions, it is possible to confirm that they only death in presence of this metal. However, it is important to note that it is imperative to repeat this experiment three times and also to include a negative control in order to confirm these results.
Siliceous ooze is mostly composed of the shells of diatoms (single-celled algae) and radiolarians (single-celled animals)
Answer: B).
Answer:
how scratching an itch is an example of a negative feedback mechanism. ... A receptor carries the information about the stimulus (itch) to the brain via an afferent pathway. Control center (brain) analyzes this information an turns on an effector which will cancel the stimulus.
