Rigid skeletons are formed from materials including chitin (in arthropods), calcium compounds such as calcium carbonate (in stony corals and mollusks) and silicate (for diatoms and radiolarians).
Answer:
They are co-dominance and incomplete dominance.
<h2 />
Explanation:
Co-dominance occurs when both alleles in a heterozygous genotype for a trait are both equally expressed. An example is the human AB blood group, in which both the A and B alleles are equally expressed.
Incomplete dominance occurs when the heterozygous genotype for a trait is expressed as a blend. An example is blue feather color in chickens, in which a black allele and white allele together are expressed as blue feather color.
Which statements describe why organisms are classified? Check all that apply.
1. Classification shows how closely related organisms are to each other.
2. Classification makes organisms easier to study.
3. Classification allows for better identification of new organisms.
The grouping system makes it easier for scientists to study certain groups of organisms.
