77 results found

Search Results for: hypothesis

Null hypothesis

Null Hypothesis Definition Null hypothesis is defined as “the commonly accepted fact (such as the sky is blue) and... Read More

Alternative hypothesis

Definition noun The hypothesis accepted to be true if the null hypothesis is rejected based on statistical... Read More

Hypothesis

Definition noun, plural: hypotheses A supposition or tentative explanation for (a group of) phenomena, (a set of) facts, or... Read More

RNA-DNA World Hypothesis?

How did life start as we know it? In the scientific community, the "RNA World Hypothesis" has many adherents. Many believed... Read More

Redundancy Hypothesis

Definition noun A theory that assumes one or more species impart a role within an ecological unit to maintain dynamic... Read More

Michaelis-menten hypothesis

Michaelis-Menten hypothesis (Science: chemistry) That a complex is formed between an enzyme and its substrate (the... Read More

Recent single-origin hypothesis

Definition noun The hypothesis that modern humans came from or evolved from a single origin (i.e. in Africa) and then these... Read More

Rivet Hypothesis

Definition noun It is a theory that entails about the conditions of ecosystem wherein a significant loss of a certain... Read More

Chemiosmotic coupling hypothesis

Definition noun A theory postulated by the biochemist Peter Mitchell in 1961 to describe ATP synthesis by way of a proton... Read More

Gene Action – Operon Hypothesis

Reviewed by: Mary Anne Clark, Ph.D. Some genes are switched on or off depending on environmental conditions. The... Read More

Chemiosmotic hypothesis

Definition noun A theory postulated by the biochemist Peter Mitchell in 1961 to describe ATP synthesis by way of a proton... Read More

Wobble hypothesis

wobble hypothesis (Science: molecular biology) explains why the base inosine is included in position 1 in the anticodons of... Read More

Mitochondrion

Mitochondrion Definition What are mitochondria? The term “mitochondrion” comes from the two words of the Greek... Read More

Water in Plants

The movement of molecules, specifically water and any solutes, is vital to understand in light of plant processes. This will... Read More

Chordata

Chordata Definition What is Chordata? Chordata is the phylum of the animal kingdom that includes a large number of animal... Read More

Neutral mutation

Neutral Mutation Definition What is a neutral mutation? Neutral mutations are the alterations in the DNA that are... Read More

Dominant species

Dominance is the state of being supreme or dominant. Community dominance refers to the form of dominance where certain... Read More

Capsid

Capsid Definition A capsid is a three-dimensional proteinaceous capsular shell around a virus that encloses the viral... Read More

Abiogenesis

Definition noun plural: abiogeneses a·bi·o·gen·e·sis, eɪbaɪəʊˈdʒɛnəsɪs (1) The idea that primitive life... Read More

Living things

Living Things Definition A living thing pertains to any organism or a life form that possesses or shows the characteristics... Read More

Erwin Chargaff

Quick Info (person) A biochemist known for his proposed Chargaff's rules that led to the discovery of the double helical... Read More

Wilcoxon rank-sum test

Definition noun A non-parametric test of two samples which support exclusively on the order of observations in which the two... Read More

Independent variable

Independent Variable Definition To define an independent variable, let us first understand what a variable is. The word... Read More

Ribozyme

Definition noun, plural: ribozymes RNA molecule that acts as an enzyme in the aminotransferase activity of the ribosome and... Read More

Particulate inheritance

Definition noun (genetics) A theory formulated by Gregor Mendel based on his garden pea breeding experiments wherein he... Read More

Ribonucleic acid

Ribonucleic Acid Definition noun (uncountable), ribonucleic acids ri·bo·nu·cle·ic ac·id, raɪboʊnjuːkliːɪk... Read More

Steroid hormone

Definition noun, plural: steroid hormones A type of steroid that acts as a hormone, and that which is exemplified by sex... Read More

Replacement model

Definition noun A theory proposed by Christopher Stringer and Peter Andrews suggesting that the place of origin of modern... Read More

Prion

prion Origin: proteinaceous infectious particle (microbiology) an infectious protein particle similar to a virus but... Read More

On Mate Selection Evolution: Are intelligent males more attractive?

A study published in Science on January 11 seems to be the first to lay empirical evidence that concur with Charles Darwin's... Read More

Theory

Definition noun, plural: theories (general) (1) A conjecture, an opinion, a speculation or an assumption based on limited... Read More

Chemiosmotic theory

Definition noun A theory postulated by the biochemist Peter Mitchell in 1961 to describe ATP synthesis by way of a proton... Read More

Synergistic effect

Synergistic Effects Definition In biology, synergistic effects are the effects when chemical substances or biological... Read More

Scientific method

Definition noun A systematic approach to solving a problem by discovering knowledge, investigating a phenomenon, verifying... Read More

Chemiosmosis

Chemiosmosis Definition What is chemiosmosis? In biology, chemiosmosis refers to the process of moving ions (e.g. protons)... Read More

Last universal ancestor

Definition noun The hypothetical primordial organism from which all other species of organisms on Earth... Read More

Totipotent cell

Definition noun The cell that is capable of developing into any cell type. Supplement In a developing embryo, totipotent... Read More

Spontaneous generation

Definition noun plural: spontaneous generations The previously popular notion that living organisms arise or develop from... Read More

Sigmund Freud and Carl Gustav Jung

Sigmund Freud Sigmund Freud was a famous Austrian neurologist (1856 - 1939), who stated that dreams were the manifestation... Read More

Selectively-permeable membrane

Selectively Permeable Membrane Definition We can define selectively permeable membranes as those that are selectively... Read More