Conifer stems are composed of a woody axis containing primitive water- and mineral-conducting cells called tracheids.
So if Dr. Sacks's many books probing the vagaries of the human mind (his latest is "Musicophilia") have shown him to be one of today's most engaging writers, the human mind seems a tip of the iceberg when he ventures into more primitive waters.
The regular episodes of historical activity at El Reventador, each lasting several years, have been attributed to repeated intrusion of primitive, water-rich magmas into an andesitic magma body at 7 12 km depth (Samaniego et al. 2008).
If a city with as primitive a water management system as New Delhi can require rainwater harvesting, so can we.
Getting to it involves a tractor ride and the facilities are relatively primitive – shower water is heated by a Kelly kettle which is hoisted into the trees and there's a compost loo, but the hut, which James describes as "gothic style", is insulated with sheep's wool and has a wood burner, so you should be warm as toast once tucked up in bed.
The order is botanically significant in having features showing characteristics of ancient gymnosperm groups, such as wood with primitive vessels (water-conducting cells).
The steady-state concentration of HCN in primitive terrestrial waters would have depended on the pH and temperature of the oceans and the input rate of HCN from atmospheric synthesis.
In the American pavilion, his hollow heads spew primitive fountains of water and his neon signs poke you in the conscience and eye.
This unprecedented, close-up look at a comet is helping scientists to answer the fundamental question of whether a bombardment of these primitive bodies brought water to Earth billions of years ago.
Characteristic of most flowering plants and absent from most gymnosperms and ferns, vessels are thought to have evolved from tracheids (a primitive form of water-conducting cell) by loss of the end walls.
Lava Point, at the park's north end, is a six-site primitive campground with no water and no fee.
