A gradual change in allele frequency or strength of phenotypic trait expression.
ID: 3167068 • Letter: A
Question
A gradual change in allele frequency or strength of phenotypic trait expression.(e.g., certain phenotypic features such as the epicanthic eye fold or skin tone) over geographic distance is the definition for ___________.
clinal variation
acclimatization
acclimation
adaptation
History, language and genetic research suggest that Scandinavians’ pigmentation is the result of _________.
gene flow
genetic drift
natural selection
superior genes
The fertility rate in the United States is reaching ____________>
baby boom
baby bust
replacement level
high birth and death rate
Immune globulins’ (immunoglobulins') job is to ____________.
specifically target the germ's RNA
recognize specifically your own proteins and turn them against those of the germs
recognize foreign proteins
recognize specifically the foreign lymphocytes
Explanation / Answer
1.clinal variation
2.genetic drift and natural selection acting together .
3.baby boom.
4.immuneglobulins helps to neutralise pathogens such as pathogenic bacteria and virus and fungi... it recognises them by identifying the proteins present on the external surface of the pathogenic organism..... so it simply recognises the foreign proteins.