Pulmonary vein
Aorta
Pulmonary artery
Vena cava
Cause they both on the screen what else
I believe that Calpurnia finds the food on the back porch.
Answer:
<em>This is an example of natural selection (adaptation).</em>
Explanation:
Natural selection tends to favor those organisms which are better adapted to live in an environment.
As tortoises having flat shell and long neck were better adapted to live in barren area, hence through natural selection those organisms were favored in such an ecosystem.
As tortoises that lived on the vegetative lands were more adapted to live in such an ecosystem, hence through natural ecosystem these organisms were favored and increased in numbers.
None of the above? I’m guessing, secondary, primary and tertiary doesn’t sound right !
