Which of the following was probably the least important factor in bringing about the Cambrian explosion?
A) the emergence of predator-prey relationships among animals
B) the accumulation of diverse adaptations, such as shells and different modes of locomotion
C) the movement of animals onto land
D) the origin of Hox genes and other genetic changes affecting the regulation of developmental genes
E) the accumulation of sufficient atmospheric oxygen to support the more active metabolism of mobile animals
Animal carcasses like this South African wildebeest provide important nutrition for both hunters and
Figure 7.1 shows the rapid decline in the trust of Americans in government since the 1960s. This de
Washing hands and removing jewelry are two important safety habits all service technicians ...
Step 8 is very important. Be sure that the customer’s concern has been corrected.
Inferring Productivity from Data on Output and Factor Accumulation
Risk factor for children age 2 to 3