Saffron
Saffron () is a spice derived from the flower of the saffron crocus (Crocus sativus), a species of crocus in the family Iridaceae . The flower has three stigma s, which are the distal ends of the plant's carpel s. Together with its style, the stalk connecting the stigmas to the rest of more
Evolution
In biology , evolution is a change in the inherited traits of a population from one generation to the next. These traits are the expression of gene s that are copied and passed on to offspring during reproduction . Mutation s in these genes can produce new or altered traits, res more
History of biology 's evolution-themed poem The Temple of Nature shows a goddess pulling back the veil from nature (in the person of Artemis ). Allegory and metaphor have often played an important role in the history of biology.
The history of biology traces the study of the living world from anci more
Immune system image of a single neutrophil (yellow), engulfing anthrax bacteria (orange).
An immune system is a collection of mechanisms within an organism that protects against disease by identifying and killing pathogen s and tumor cells. It detects a wide variety of agents, from virus es to more
Platypus
The Platypus (Ornithorhynchus anatinus) is a semi-aquatic mammal endemic to eastern Australia , including Tasmania . Together with the four species of echidna , it is one of the five extant species of monotreme s, the only mammals that lay eggs instead of giving birth to live young. I more