A protist is an organism in the Kingdom Protista. Protists belong to a very large, diverse group of organisms that are all eukaryotic, and most are unicellular. Examples of protists include red algae, amoeba and slime molds.
Protists vary in their movement, and they are separated in locomotion categories of cilia (hair-like projections), flagella (thread-like, whip appendages) and pseudopodia (temporary projections). They also vary in the way they gain energy, as often a single method of acquiring energy is specific to a single protist. The four groups of protist energy are: photosynthetic autotroph, chemosynthetic autotroph, heterotroph by ingestion and heterotroph by absorption.Learn More
Dominant alleles are always expressed in the organism, while recessive traits tend to be expressed only when the dominant allele is not present. The relationship between dominant and recessive genes is described by the Law of Segregation. As related by About.com, Gregor Mendel observed nine different traits among his pea plants and found that certain traits, such as pod color, bred true only when two recessive alleles were present.Full Answer >
According to the Merriam-Webster Dictionary, "non-pathogenic" means that an organism does not cause disease, so non-pathogenic bacteria do not cause illness. Some bacteria are helpful within their environments.Full Answer >
DNA sequencing is used to identify individual genes within the DNA of any organism. This information can be used to identify variants and mutations that cause diseases and disorders.Full Answer >
According to the National Center for Biotechnology Information, the primary role of DNA polymerases is to replicate the DNA of an organism, accurately and efficiently, during cell division. Additionally, polymerases play a vital role in proofreading the genetic code for errors and fixing those that arise.Full Answer >