linkedin post 2020-09-09 04:27:32

Uncategorized
HARDWIRED. "Analysis of cell type specificity in signal propagation has revealed the movement of systemic signals through specific cell types, suggesting that a rapid signaling network may be hardwired into the architecture of the plant." But not in a nervous system that animas use. http://www.annualreviews.org/doi/abs/10.1146/annurev-arplant-043015-112130 View in LinkedIn
Read More

linkedin post 2020-09-11 04:58:40

Uncategorized
ACETYLCHOLINE. "These findings demonstrate the ubiquitous expression of ACh and ACh-synthesizing activity among life forms without nervous systems, and support the notion that ACh has been expressed and may be active as a local mediator and modulator of physiological functions since the early beginning of life.” (ACh = acetylcholine). https://lnkd.in/dBN5S9C View in LinkedIn
Read More
linkedin post 2020-09-11 04:54:09

linkedin post 2020-09-11 04:54:09

Uncategorized
ALTERNATIVE MECHANISM. "Rapid closure is brought about by a combination of elastic properties and biochemical/biophysical changes in the motor cells. However, unlike animal neuronal action potentials in which Na+/Ca2+ ions carry the depolarizing phase of the action potential, the rapid depolarization component of the Venus flytrap action potential is most likely brought about by the opening of rapid (R-type) anion channels since plants lack the voltage-sensitive cation channels that characterise animal excitability." http://www.sciencedirect.com/science/article/pii/S096098221300849X View in LinkedIn
Read More

linkedin post 2020-09-12 03:35:59

Uncategorized
WHALE ANCESTORS. "All cetaceans, including whales, dolphins and porpoises, are descendants of land-dwelling mammals of the Artiodactyl order (even-toed ungulates). Both are related to the Indohyus, an extinct semi-aquatic deer-like ungulate, from which they split around 54 million years ago. These primitive cetaceans first took to the sea about 50 million years ago and became fully aquatic about 5-10 million years later." https://lnkd.in/d3tQ2S7 View in LinkedIn
Read More
linkedin post 2020-09-12 03:33:56

linkedin post 2020-09-12 03:33:56

Uncategorized
LAND ANCESTORS OF WHALES. "Although early whale fossils had been known at least as early as the 1830s, they were often mistaken for giant marine reptiles, as evidenced by the genus name Basilosaurus (Greek for ‘king lizard’), a long, snake-like whale from the Late Eocene [38–34 million years ago (Mya)]." https://www.researchgate.net/profile/Michael_Mcgowen/publication/275671338_A_Whale_of_a_Tale/links/558bce1608ae681f47160178.pdf View in LinkedIn
Read More

linkedin post 2020-09-12 03:32:02

Uncategorized
AMPLE FOSSIL EVIDENCE. "A number of important fossil finds in the 1980s to 2000s revealed several forms that displayed an elegant sequence of incremental adaptations to life beneath the waves. Since then, the evolution of cetaceans has emerged as an example of one of the most well-documented phenotypic transitions in the vertebrate fossil record." https://lnkd.in/d-3T5AM View in LinkedIn
Read More
linkedin post 2020-09-12 03:30:32

linkedin post 2020-09-12 03:30:32

Uncategorized
TRANSITION TO LAND. "Many amniote groups (e.g. sauropterygians, squamates, cetaceans, sirenians, pinnipeds) made the evolutionary transition from a fully terrestrial to a semi- or fully aquatic life. This required major morphological and physiological changes that are best developed in the most specialized aquatic forms, like extant cetaceans and sirenians, which now live totally independent of the terrestrial environment." http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0118409 View in LinkedIn
Read More