Early improvements to microscopes allowed some scientists to view cells and eventually develop what?

In a certain plant, yellow leaves are dominant (y) and red leaves are recessive (y). a plant with genotype yy and a plant with yy are crossed. if they have four offspring, how many would you predict would have red leaves? a: 1b: 0c: 3d: 2

Geographic earth materials modified over time by physical, chemical, and biological processes that serve many functions are considered a) equatorial parent materials b) modified soil horizons c) modified atmospheric materials d) nurtured dominant structures

The higher the proportion of loci that are "fixed" in a population, the lower is that population's a) nucleotide variability.b) average heterozygosity.c) diploidy.d) a and b e) a, b, and c