At are the first organisms in the primary succession?
a. small trees
b. small bushes
c. lichens
d. pine trees

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 type of pollution does household garbage cause

Spirochetes have a twisting and flexing locomotion due to appendages called