When compared to current average conditions, which term would best describe conditions in earth's lower atmosphere if greenhouse gases were absent?

The illustration shown is an ovum, a female sex cell. a mutation in this cell may be passed to the woman’s offspring during a) birth. b) mitosis. c) dna replication. d) sexual reproduction

Dna and rna share a number of similarities,but they also differ in certain aspects of their structure. wich nitrogenous base is found in rna but is not found in dna

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.