Sexual selection refers to species' selection for traits that are attractive to the opposite sex. This special type of natural selection enhances opportunities to mate, the tail of male peacocks being an iconic example.
Evolution
Jul 9, 2014
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MIT researchers uncover the secrets behind a marine creature's defensive armor—one that is exceptionally tough, yet optically clear.
Nanomaterials
Mar 30, 2014
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0
(PhysOrg.com) -- The yellow-bellied three-toed skink (Saiphos equalis) is one of only three reptiles known to have different methods of reproduction in different places. In the coastal areas of New South Wales (NSW), near ...
(PhysOrg.com) -- Scientists have shown in the laboratory that metal nanoparticles damaged the DNA in cells on the other side of a cellular barrier. The research, by the University of Bristol, is published online this week ...
Bio & Medicine
Nov 5, 2009
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(PhysOrg.com) -- Scientists at Penn State and the National Institute of Genetics in Japan have demonstrated that several statistical methods commonly used by biologists to detect natural selection at the molecular level tend ...
Evolution
Mar 30, 2009
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New research on reproductive health demonstrates the first successful delivery of mRNA to placental cells to treat preeclampsia at its root.
Bio & Medicine
Feb 15, 2023
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Multiple researchers at the Jackson Laboratory (JAX) are taking part in an ambitious research program spanning several top research institutions to study senescent cells. Senescent cells stop dividing in response to stressors ...
Cell & Microbiology
Dec 29, 2022
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227
The fossil record tells us about ancient life through the preserved remains of body parts like bones, teeth and turtle shells. But how to study the history of soft tissues and organs, which can decay quickly, leaving little ...
Evolution
Jul 1, 2022
2
434
A mother's gut microbes can help in the development of the placenta, and the healthy growth of the baby—according to new research from the University of East Anglia, the Quadram Institute and the University of Cambridge.
Cell & Microbiology
Jun 28, 2022
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17
An international collaboration involving Duke-NUS Medical School and Monash University researchers has made an unexpected world-first stem cell discovery that may lead to new treatments for placenta complications during pregnancy.
Cell & Microbiology
Sep 16, 2020
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The placenta is an organ unique to mammals that connects the developing fetus to the uterine wall. The placenta supplies the fetus with oxygen and food, and allows fetal waste to be disposed of via the maternal kidneys. The word placenta comes from the Latin for cake, from Greek plakóenta/plakoúnta, accusative of plakóeis/plakoús - πλακόεις, πλακούς, "flat, slab-like", referring to its round, flat appearance in humans. Protherial (egg-laying) and metatherial (marsupial) mammals produce a choriovitelline placenta that, while connected to the uterine wall, provides nutrients mainly derived from the egg sac. The placenta develops from the same sperm and egg cells that form the fetus, and functions as a fetomaternal organ with two components, the fetal part (Chorion frondosum), and the maternal part (Decidua basalis).
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