Only males among the fish species crucian carp have developed a strategy to protect themselves from hungry predators, according to a new study from Lund University in Sweden published in the journal Evolution. The explanation ...
Plants & Animals
Jan 24, 2023
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2
Despite attempts by the airline industry to cultivate more diverse working environments, researchers from Surrey have found that gendered practices and pressures still persist—with female cabin crew encountering precise ...
Social Sciences
Jan 17, 2023
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1
Publicly available salary information prompts organizations to reduce the gender pay gap, according to a new study from the University of California San Diego's School of Global Policy and Strategy.
Social Sciences
Jan 17, 2023
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19
When you hear beautiful birdsong, such as the warbling of the Australasian magpie, you might believe it's a sign of intense competition for territory or showing off to attract a mate.
Plants & Animals
Jan 17, 2023
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13
A new study from a team at the University of Lausanne, Switzerland, explores the use of touchscreen devices in experiments conducted on wild primates, with the aim of reducing the need for captive animals.
Ecology
Jan 16, 2023
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41
The male reproductive system serves as a hotspot for the emergence of new genes. Perhaps that explains why more new mutations are inherited from fathers than from mothers. It doesn't, however, clarify why older fathers pass ...
Evolution
Jan 12, 2023
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46
Researchers at Nagoya University, Japan, have discovered a mechanism for the selective transportation of sugar and hormones in plants. The results also clarify that sugar transportation is necessary for male fertility in ...
Plants & Animals
Dec 27, 2022
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125
An accidental sting has helped Japanese scientists prove some male wasps have a rather unusual predator defence weapon: penis spikes.
Plants & Animals
Dec 25, 2022
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5
A team of researchers affiliated with several institutions in the U.S. and one in Canada has characterized a large number of red pigment samples found on the bones of ancient people who once lived in what is now southern ...
In most mammals, males disperse to a new group after reaching sexual maturity. Dispersal often entails costs and is risky. New results from spotted hyenas show that males from the same birth group—and particularly twin ...
Plants & Animals
Dec 19, 2022
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78
Male (♂) refers to the sex of an organism, or part of an organism, which produces small mobile gametes, called spermatozoa. Each spermatozoon can fuse with a larger female gamete or ovum, in the process of fertilization. A male cannot reproduce sexually without access to at least one ovum from a female, but some organisms can reproduce both sexually and asexually.
Not all species share a common sex-determination system. In humans and most animals, sex is determined genetically but in other species it can be determined due to social, environmental, or other factors. The existence of two sexes seems to have been selected independently across different evolutionary lineages (see Convergent Evolution). Accordingly, sex is defined operationally across species by the type of gametes produced (ie: spermatozoa vs. ova) and differences between males and females in one lineage are not always predictive of differences in another.
Male/Female dimorphism between organisms or reproductive organs of different sexes is not limited to animals; male gametes are produced by chytrids, diatoms and land plants, among others. In land plants, female and male designate not only the female and male gamete-producing organisms and structures but also the structures of the sporophytes that give rise to male and female plants.
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