General Biology: Definitions and explanations page 15 PDF | Download eBooks
Learn general biology terms with definitions and explanations, biology terminologies (Page 15) for biology degree programs.
- What is Root?
In vascular plants, the root is the organ of a plant that typically lies below the ... - What is RT-PCR?
Reverse transcription polymerase chain reaction (rt-pcr) is a laboratory technique combining reverse transcription of rna into ... - What is Ruminants?
Ruminants are mammals that are able to acquire nutrients from plant-based food by fermenting it in ... - What are Salivary glands?
The salivary glands in mammals are exocrine glands that produce saliva through a system of ducts. ... - What is Saturated fatty acid?
A saturated fatty acid chain is formed when no double bonds are present on the chain ... - What are Scaffolding proteins?
Scaffold proteins are important regulators of many important signaling pathways. these proteins also clasp proteins in ... - What is Science?
Science is a systematic approach that builds and organizes knowledge with the help of predictions, facts ... - What is Scion?
Grafting and budding are horticultural techniques used to join parts from two or more plants so ... - What is Scrotum?
The scrotum is a reproductive structure in males that consists of a hanging sack of skin ... - What are Second messengers?
Second messengers are molecules that relay signals received at receptors on the cell surface - such ... - What is Secondary growth?
Secondary growth is the growth that results from cell division in the cambia or lateral meristems ... - What is Seed?
A seed is an embryonic plant enclosed in a protective outer covering. the formation of the ... - What is Self pruning?
When a tree sheds a dead branch. this occurs in nature when a tree is in ... - What is Self thinning?
The self-thinning rule describes plant mortality because of competition in crowded even-aged stands. this is basically ... - What is Semiconservative model?
Semiconservative replication describes the mechanism of dna replication in all known cells. it derives its name ... - What are Semilunar valves?
The aortic and pulmonary valves are located at the base of the aorta and the pulmonary ... - What is Senescence?
Senescence or biological aging is the gradual deterioration of functional characteristics. the word senescence be used ... - What are Sepals?
A sepal is a part of the flower of angiosperms (flowering plants). usually green, sepals typically ... - What is Septa?
A hypha consists of one or more cells surrounded by a tubular cell wall. in most ... - What are Sex chromosomes?
Sex chromosomes are those that determine the sex of an individual. for example a female inherits ... - What are Sex linked genes?
Any gene that is present on the sex chromosome is called the sex linked gene. therefore ... - What is Sexual dimorphism?
Sexual dimorphism is the condition where the two sexes of the same species exhibit different characteristics ... - What is Sexual reproduction?
A kind of reproduction that involves the fusion of gametes and production of a daughter cell ... - What is Sexual selection?
Sexual selection is a mode of natural selection where members of one biological sex choose mates ... - What is Shared ancestral character?
Traits that have been inherited to species by their ancestors is known as shared ancestral traits. ... - What is Shared derived character?
A derived character is one that evolved in the lineage leading up to a clade and ... - What is Shoot system?
The shoot system includes organs such as leaves, buds, stems, flowers, and fruits and usually it ... - What are Short day plants?
A plant that requires a long period of darkness, is termed a "short day" or a ... - What are Short tandem repeats?
A short tandem repeat is a microsatellite, consisting of a unit of two to thirteen nucleotides ... - What is Sickle cell disease?
Sickle cell disease is a group of blood disorders that are commonly inherited from a person's ... - What is Signal peptide?
A signal peptide is a short peptide present at the n-terminus of the majority of newly ... - What is Signal transduction?
Signal transduction is the process by which a chemical or physical signal is conveyed through a ... - What is Signal-recognition particle (SRP)?
The signal recognition particle is an abundant, cytosolic, universally conserved ribonucleoprotein that recognizes and targets specific ... - What is Silent mutation?
Silent mutations are mutations in dna that do not have an observable effect on the organism's ... - What is Simple fruit?
A fruit that develops from a single ovary in a single flower. simple fruits may be ... - What is Simple sequence DNA?
A simple sequence dna is the same as a short tandem repeat or a microsatellite. t ... - What is Single circulation?
Single circulation is the type of circulatory system that occurs in fishes, in which the blood ... - What are Single strand binding proteins?
Single-stranded binding proteins are a class of proteins that have been found in organisms ranging from ... - What is Sinoatrial mode?
The sinoatrial node is a group of cells located in the wall of the right atrium ... - What is siRNA?
Sirna, which stands for small interfering ribonucleic acid, is a class of double-stranded rna molecules. it ... - What are Sister chromatids?
A sister chromatid refers to the similar copies formed by the dna replication of a chromosome. ... - What is Skeletal System?
The skeleton is the body part that forms the supporting structure of an organism. it can ... - What is Small intestine?
The small intestine or small bowel is an organ in the gastrointestinal tract where most of ... - What is Smooth muscle?
Smooth muscle is an involuntary non-striated muscle. it is divided into two subgroups; the single-unit (unitary) ... - What is SNP?
Single nucleotide polymorphisms, frequently called snps, are the most common type of genetic variation among people. ... - What are Soil horizons?
A soil horizon is a layer parallel to the soil surface, whose physical, chemical and biological ... - What is Soil salinization?
Soil salinity is the salt content in the soil. the process of increasing the salt content ... - What is Solute potential?
Solute potential is also called osmotic potential because solutes affect the direction of osmosis. the solutes ... - What is Solute?
The substance that gets dissolved in the solvent. a solute is defined as the substance that ... - What is Solution?
A mixture of two substances that dissolve in to each other and are uniformly distributed throughout ... - What is Solvent?
The liquid part of a solution that acts as a dissolving agent and dissolves all the ... - What are Somatic cells?
All the cells in the body are termed somatic cells with the exclusion of the reproduction ... - What is Speciation?
Speciation is the evolutionary process by which populations evolve to become distinct species. speciation may also ... - What is Specific heat?
Specific heat is a physical property of matter and is the energy required per mass of ... - What is Spectrophotometer?
The spectrophotometer is an optical instrument for measuring the intensity of light relative to wavelength. electromagnetic ... - What is sperm?
Sperm is the reproductive cell of a male. a sperm cell that has a flagella and ... - What is Spermatogenesis?
Spermatogenesis is the route through which haploid spermatozoa develop from their ancestoral germ cells. this occurs ... - What is Sphincter?
A sphincter is a circular muscle that normally maintains constriction of a natural body passage or ... - What is Spliceosome?
A spliceosome is a large and complex molecular machine found primarily within the nucleus of eukaryotic ... - What is Spongy mesophyll?
A layer of cells in the interior of leaves, consisting of loosely arranged, irregularly shaped cells ...