Worldwide, how many children die each year from diseases for which vaccinations are available?

Aresearcher has developed two stains for use with seed plants. one stains sporophyte tissue blue; the other stains gametophyte tissue red. if the researcher exposes pollen grains to both stains, and then rinses away the excess stain, what should occur? a) the pollen grains will be pure red.b) the pollen grains will be pure blue.c) the pollen grains will have red interiors and blue exteriors.d) the pollen grains will have blue interiors and red exteriors.

14. which of the following codons code for threonine? a. ucg b. ugu c. cga d. aca

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic