Answer:
Zebra mussels are spread from one body of water to another by natural flow, carried on the feathers or feet of birds, or by humans in bait buckets or on boats.
I believe it's oxygenated or oxygen rich blood away from the heart.
Answer:
Hey there!
I believe that David's prediction would be: If the amount of pollutants in the atmosphere reached an amount unhealthy for the salamanders, then the salamander population would decrease.
Let me know if this helps :)
Answer:
1. ocular lens,2. eyepiece,3. arm,4.focus knob,5.objective lens,6,stage,7,light source,8 coarse knob
Explanation:
