Air pollution is caused by a. the sun. b. heavy rainfall. c. human activities but not natural events. d. natural events and human activities.

Which flexible structure that supports the nerve cord and led to the backbone

Which represents the cross between parent plants if one is heterozygous for yellow-colored pods and the other is homozygous for green-colored pods? yy  ´    ´    ´    ´  yy

What best describes the structure of the declaration of independence?