Primary and Secondary Immune Responses: What’s the Difference? During an initial immune response, antigen activates naive B cells, which then develop into antibody-secreting cells which make antibodies unique for the antigen that triggered the response. While the same antigen stimulates memory B cells, a secondary immunological response is induced, resulting in the generation of more specific … Read more
Definition of Monocot Flower Monocot flowers are compressed shoot areas with particular sexual reproductive functions. The greatest distinguishing feature of monocot flowers is that their flower parts are frequently arranged in threes or multiples of threes. The analysis of flowers and their components can therefore be used to distinguish among monocot and dicot plants. Despite … Read more
Definition of Amphibians A type of cold-blooded animals that can live in aquatic as well as terrestrial environments are Amphibians. In Greek, the word “amphibios” means to live twice, hence the phrase “amphibian.” Although several species within the category of amphibians may be stable land residents, others may be permanent aquatic dwellers, the title represents … Read more
Definition of Autotroph An autotroph is a group of organisms that can make their own food from a variety of sources, including sunlight, air, water, and other chemicals. The word autotroph is made up of the words auto (meaning self) and troph (meaning sustenance). Autotrophs, on the other hand, are capable of making their own … Read more
Definition of Incomplete Dominance A dominance mechanism in heterozygotes wherein the dominant allele doesn’t completely override recessive allele’s phenotypic expression, resulting in an intermediary phenotype inside the heterozygote is Incomplete dominance. Since the phenotype emerging from the genotype is essentially a combination of dominant and recessive genes, incomplete dominance is also known as partial dominance … Read more
Transcription Definition (What is Transcription in Biology) Transcription is the process of transferring genetic information from a DNA strand to an RNA strand through a sequence of polymerization processes catalysed by DNA-dependent RNA polymerases. The information is passed on from one structure to another in the first phase of gene expression. RNA molecules are begun, … Read more
Monohybrid Cross Definition A monohybrid cross is a genetic cross between two individuals who have homozygous genotypes for a single feature or trait, with the phenotype often being the polar opposite. Monohybrid crossings are commonly used to ascertain the genotypes of homozygous individuals’ progeny. The hybrid resulting from this cross aids in the determination of … Read more
Definition of Biotic Factors The live organism that shapes an environment is referred to as the biotic factor or biotic component. Plants, animals, bacteria, algae, and all other life elements in an environment are considered biotic factors. An ecosystem is a complex system of living and non-living organisms, with biotic elements forming the life part … Read more
What is Simple Diffusion ? Simple diffusion is an unassisted type of diffusion in which a particle moves from a higher to a lower concentration. The directional movement through the concentration gradient is passive. Once the molecules become evenly distributed, the molecules on the either sides of the cell membrane achieve an equilibrium where no … Read more
What is Chromosome ? A chromosome is a thread-like structure made up of a single molecule of DNA (Deoxyribonucleic acid) and proteins that carries some or all of an organism’s genetic materials. It is found in the nucleus or nuclear region of the cytoplasm. Only during the metaphase of the cell cycle, when the chromosomes … Read more