331 results found

Search Results for: female

Gamete

Definition of Gamete What is a gamete? A gamete is the mature reproductive or sex cell that contains a haploid number of... Read More

Female

Female 1. An individual of the sex which conceives and brings forth young, or (in a wider sense) which has an ovary and... Read More

Parthenogenesis

To reproduce, by definition, means to produce new offspring. The process is referred to as reproduction, which is one of the... Read More

Sexual reproduction

Sexual reproduction is a mode of reproduction involving the fusion of haploid female gamete (egg cell) and haploid male... Read More

Asexual reproduction

Asexual Reproduction Definition What is asexual reproduction? Asexual reproduction is a mode of reproduction that does not... 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

Angiosperm

Angiosperms Definition What is an angiosperm? An angiosperm is a plant that produces flowers. The angiosperms, also... Read More

Estrogen

Definition noun, plural: estrogens A sex steroid hormone produced in large quantities chiefly in the ovaries in females;... Read More

The Amazing Spider Dads

Humans are not the only fathers capable of giving it all for the sake of their progeny. The animal kingdom is teeming with... Read More

Sex Reversal – When Males Grew Ovaries Instead of Testes

Summary: Sex reversal is not unusual in some animals, especially in invertebrates. As for the vertebrates, there are... Read More

Fecundity

Fecundity Definition The meaning of fecundity is the reproductive rate (fecundity rate) or the performance of an individual... Read More

Hermaphrodite

Definition noun (1) An organism (plant or animal) having both male and female reproductive organs. (2) An organism having... Read More

Cloning

Definition noun The process of creating an exact copy of a biological unit (e.g. a DNA sequence, cell, or organism) from... Read More

Gynaecophore

Definition noun, plural: gynecophores A receptacle, often in the ventral body, of certain adult male animals (dioecious... Read More

Woman

woman 1. An adult female person; a grown-up female person, as distinguished from a man or a child; sometimes, any female... Read More

Zygote

Zygote Definition What is a zygote? A zygote is a fertilized eukaryotic cell. In biology, medical science, and other allied... Read More

SENI Biometric Analysis on the extinct Scincidae species: Macroscincus coctei (underlined)

Brian L. Schnirel Leeway Corucia Research Center (LCRC) Courtesy: Polyphemos (2004)   Introduction: It has been... Read More

Wuchereria bancrofti

Definition A species of the family Onchocercidae that infects the lymphatic system and causes lymphatic... Read More

Estradiol

Definition noun, plural: estradiol An estrogenic hormone with a chemical formula of C18H24O2; a potent estrogen; a major... Read More

Flower

Definition noun, plural: flowers Sexual reproductive structure of plants, especially of angiosperms (flowering... Read More

Animal

Animal Definition An animal (plural: animals) refers to any of the eukaryotic multicellular organisms of the biological... Read More

Ox

ox (Science: zoology) The male of bovine quadrupeds, especially the domestic animal when castrated and grown to its full... Read More

Mule

Definition noun, plural: mules (zoology) A sterile hybrid offspring, especially of a male donkey and a female horse (botany)... Read More

Biogenesis

Definition noun plural: biogeneses (1) The process in which life forms arise from similar life forms (2) A theory that... Read More

Schistosoma

Definition noun (taxonomy) A genus of the Phylum Platyhelminthes that is comprised of parasitic... Read More

Fragmentation

Fragmentation Definition What is fragmentation? In general, fragmentation refers to the state or the process of breaking... Read More

Egg cell

Definition noun, plural: egg cells (1) Female gamete; female sex cell; female reproductive cell. (2) Unfertilized ovum,... Read More

Haplodiploidy

Definition noun A biological system of sex determination as observed in the Hymenopteran species (e.g. ants and bees) where... Read More

Human

Definition noun plural: humans hu‧man, (h)yo͞omʹn A bipedal primate belonging to the genus Homo, especially Homo... Read More

Enterobius vermicularis

Definition noun Human pinworm that inhabits the rectum of its host Supplement Enterobius vermicularis (formerly Oxyurias... Read More

Reproductive system

Definition noun An organ system that functions primarily for the purpose of reproduction, and is comprised of sex... Read More

Sexual dimorphism

Sexual Dimorphism Definition Sexual dimorphism refers to the morphological differences (in form or appearance) between... Read More

Mantis

Mantis Definition A mantis (plural: mantises or mantes) refers to any of the insects that belong to the order Mantodea... Read More

Vascular plants

Definition of Vascular plants The term 'vascular' is derived from the Latin word vāsculum, vās, meaning "a container and... Read More

Oocyst

Definition noun, plural: oocysts A resistant, thick-walled spore containing the zygote Supplement Apicomplexa is a phylum... Read More

Ookinete

Definition noun, plural: ookinetes The motile zygote formed by the fertilization of microgamete and macrogamete of certain... Read More

New Zealand’s Unique Fauna

By: Maria Victoria Gonzaga In the previous lesson, we learned about the high biodiversity of New Zealand and how... Read More

Milk

milk 1. (Science: physiology) A white fluid secreted by the mammary glands of female mammals for the nourishment of their... Read More