Which term describes the genotype of an individual that has two different forms of the allele?

a
allelotype
b
heterozygous
c
homozygous
d
phenotype

Compare and contrast nutrient limitation in soil vs. nutrient limitation in aquatic ecosystems

Fossils can only be formed when? if mud, silt or tar is in the area to preserve the fossil ierosion does not occur and allows the fossil to form oxygen and microorganisms cannot decay the bones the area is dry and does not contain mud or silt

Which of these parts of the membrane large moecules pass through it ?