Which organisms develop gills from pharyngeal arches and later develop lungs to breathe on land?

In the african savanna,more wildebeests are born than the environment can support. which is most likely to happen over a period of years as a result

In what layer of the sun is energy transfers between atoms

Which of the following is not a symptom of desertification? a) decrease in salt content of the soil b) lowering of the water table c) reduced surface water d) increased soil erosion e) loss of native vegetation