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Sexual reproduction is a type of reproduction that involves a complex life cycle in which a gamete (haploid reproductive cells, such as a sperm or egg cell) with a single set of chromosomes combines with another gamete to produce a zygote that develops into an organism composed of cells with two sets of chromosomes . [1]
The reproductive system of an organism, also known as the genital system, is the biological system made up of all the anatomical organs involved in sexual reproduction.Many non-living substances such as fluids, hormones, and pheromones are also important accessories to the reproductive system. [1]
Gafrarium pectinatum, [2] [3] also known as Gafrarium tumidum, [4] [5] is a species of the genus Gafrarium in the family of Veneridae, order Veneroida in the bivalve class. They are edible clams. [5] WoRMS believe the latter is the synonyms of the other one, [6] but malocologist from Taiwan distinguish the two from the patterns of their shells ...
In botany, the term lusus was used. [1] In horticulture, the spelling clon was used until the early twentieth century; the final e came into use to indicate the vowel is a "long o" instead of a "short o". [2] [3] Since the term entered the popular lexicon in a more general context, the spelling clone has been used exclusively.
In the largest U.S. study, which used data from a statewide registry of birth defects, [17] 6.2% of IVF-conceived children had major defects, as compared with 4.4% of naturally conceived children matched for maternal age and other factors (odds ratio, 1.3; 95% confidence interval, 1.00 to 1.67). [13]
Open Journal Systems, also known as OJS, is an open source and free software for the management of peer-reviewed academic journals, created by the Public Knowledge Project, and released under the GNU General Public License. [1]
Autocrine signaling occurs when the chemical signal acts on the same cell that produced the signaling chemical. [1] Intracrine signaling occurs when the chemical signal produced by a cell acts on receptors located in the cytoplasm or nucleus of the same cell. [2] Juxtacrine signaling occurs between physically adjacent cells. [3]
A parameter space representing the conditions in which speciation by reinforcement can occur. Here, three outcomes can arise: 1) extinction of one of the initial populations; 2) the initial populations can hybridize; 3) the initial populations can speciate. The outcomes are determined by both initial divergence and level of fitness of the hybrids.