Discuss the problems that animals had to overcome to adapt to the land environment. How did they overcome these
problems? Provide specific examples of these adaptations. What will be an ideal response?
Because animals evolved in a moist environment, they had to adapt to the drying effects of
the atmosphere by acquiring an outer covering for protection. They also had to develop a
means to extract oxygen from the atmosphere by lungs rather than from water by gills.
Because animals need mobility to find food, they also had to develop a means of locomotion
on land by foot rather than locomotion in water by fins. And, animals need to overcome the
effects of gravity with a skeletal structure for support. Their reproductive strategy moved
toward internal fertilization since gametes were no longer dispersed in water, and they had to
combat the problems of desiccation of unprotected eggs with the evolution of the amniote
egg.
You might also like to view...
This is the average length of time before stresses build large enough to cause an earthquake to occur in some location.
A. epicenter interval B. recurrence interval C. fault interval
In general, during an earthquake you should ________.
A. run outside if you are inside, and then drop, cover, and hold on B. wait to see how bad the earthquake is before deciding what to do C. run inside if you are outside, and then drop, cover, and hold on D. drop, cover, and hold on where you currently are
The United States is a nation of immigrants, and currently takes in 20% of the world's migrants yearly. The issue of immigration, especially illegal immigration, is controversial among citizens and business people. What are the arguments for and against immigration? Are these arguments valid?Why or why not?
Which of the following is NOT an example of a hydrogenous sediment?
A. Ooliths B. Phosphorites C. Manganese nodules D. Salts E. Tektites