What biome is characterized by its layer of permafrost ?

a.) ponds and lakes
b.) cold desert
c.) arctic tundra
d.) boreal forest

Does mitochondria still meet the definition of a eukaryote why or why not?

Classify the structures as homologous or analogous, depending on their structure and function.

If two parents who's blood types are both b produce a child that has blood type o, what can you say about the parent's genotybes? oa) one is ii ob) one is ibi oc) both are bi od) nothing, this is impossible