18. Option D is correct
Plasmodium is the causative agent of malaria.
It completes its life cycle in two hosts.
In humans, it exhibits asexual reproduction.
Sporozoites infect human hepatocytes.
Gametocytes infect mosquitoes.
19. Option B is correct
Nextstain = An open-source project that allows real-time tracking
of the evolution of a pathogen
A continental population of songbirds has a locus for beak colour with two alleles: AA=red, Aa=orange,...
A continental population of songbirds has a locus for beak colour with two alleles: AA=red, Aa=orange, and aa=yellow; A is at 80% in the population and a is at 20%. In a founder event involving a single pregnant female, who mated once before flying away to a remote island, the probability of the new population being all yellow-beaked is approximately what?