These specialists, I learned, have done a great deal of work to improve the size and health of the plants and the resulting flowers.

When they have 4 to 6 leaves and are thrifty little plants, it's time to set them out where they are to remain.

We have set up a central R & D department, as well as engineering-management departments -- about 80 people working on problems related to those of our plants.

At the end of the Devonian period (), the seas, rivers and lakes were teeming with life but the land was the realm of early plants and devoid of vertebrates though some, such as Ichthyostega, may have sometimes hauled themselves out of the water.

Although they are often considered to be weeds in gardens, this viewpoint is not always necessary, as most of them die when the soil temperature warms up again in early to late spring when other plants are still dormant and have not yet leafed out.

It also includes such plants as roses, tulips, and common plants found to have flower structures.

It includes perennial herbaceous plants which are glabrous and have short rhizomes with fibrous roots or are rhizomatous with root tubers.

Alismatales comprise herbaceous flowering plants of aquatic and marshy habitats, and the only monocots known to have green embryos other than the Amaryllidaceae.

Under the Cronquist system of taxonomic classification of flowering plants Asteraceae was the only family in the group, but newer systems ( such as APG II and APG III ) have expanded it to eleven.

Asterales are common plants and have many known uses.

The desalination plants, which remove the salt from ocean water, have created a new source of water for farming, drinking, and washing.

Note that quite a few of the plants that were once included in family Alliaceae have been assigned to the subfamily Brodiaeoideae ( rather than the subfamily Allioideae ).

Many plants in this family, such as wild carrot, have estrogenic properties and have been used as a folk medicine for birth control.

The chronic energy shortages Armenia suffered in the early and mid-1990s have been offset by the energy supplied by one of its nuclear power plants at Metsamor.

The chronic energy shortages Armenia suffered in recent years have been largely offset by the energy supplied by one of its nuclear power plants at Metsamor.

The plants are easy to cultivate and ( in areas that have winter ) are generally grown in large pots or tubs that can be protected from frost.

The zones of minimum rainfall have a very scanty flora, consisting of plants adapted to resist the great dryness.

Many of DOC's Arbor Day activities focus on ecological restoration projects using native plants to restore habitats that have been damaged or destroyed by humans or invasive pests and weeds.

Both plants and animals have evolved mechanisms allowing them to survive extremes.

While many indigenous Amazonian people say they received the instructions directly from plants and plant spirits, researchers have devised a number of alternative theories to explain its discovery.

Alkaloid-containing plants have been used by humans since ancient times for therapeutic and recreational purposes.

For example, medicinal plants have been known in the Mesopotamia at least around 2000 BC.

First classification methods have historically combined alkaloids by the common natural source, e. g., a certain type of plants.

It is no harder to raise big, healthy, blooming plants than weak, sickly little things ; ;

A colossal campaign opened to sell more sexual organs of plants and Mrs. Joseph ( `` Shadow of Greatness '' ) Douglas was quoted as saying: `` I would no more sit down without flowers on my table than without serviettes ''.

Its chemical composition makes it difficult to match the amber to its producers – it is most similar to the resins produced by flowering plants ; however, there are no flowering plant fossils until the Cretaceous, and they were not common until the Upper Cretaceous.

Animism encompasses the beliefs that there is no separation between the spiritual and physical ( or material ) world, and souls or spirits exist, not only in humans, but also in all other animals, plants, rocks, geographic features such as mountains or rivers, or other entities of the natural environment.

Brews can also be made with no DMT-containing plants ; Psychotria viridis being substituted by plants such as Justicia pectoralis, Brugmansia, or sacred tobacco, also known as Mapacho ( Nicotiana rustica ), or sometimes left out with no replacement.

Ayahuasca plants and preparations are legal, as they contain no scheduled chemicals.

In Scotland, the berries were originally wild-harvested but with the loss of suitable habitat, the plants have become so scarce that this is no longer done.

There are no endemic species of plants, birds, amphibians, reptiles, mollusks, crustaceans, or mammals on Diego Garcia or in the surrounding waters.

The method requires no substrate and entails growing plants with their roots suspended in a deep air or growth chamber with the roots periodically wetted with a fine mist of atomized nutrients.

Although there is no record to establish when plants were first used for medicinal purposes ( herbalism ), the use of plants as healing agents is an ancient practice.

Extinction of animals and plants caused by human actions may go as far back as the late Pleistocene, over 12, 000 years BP, but there is no direct evidence for this theory and it is more likely abrupt climate change played a much higher role in the extinction of larger mammals.

The element serves no apparent vital biological function, since animals and plants survive in good health without it.

Water for settlers was produced by large distillation plants, since no fresh-water wells could be successfully dug on the island.

And plants here bloom more luxuriantly and more perfectly with a natural vigour that knows no exhaustion and fears no poverty, a vigour that has disappeared from our continent.

The same reference claims that the smoke released has no negative impact on neighbors or the environment, and the ash left in the stove can be used for fertilizing gardens and plants.

In contrast, they have no effect on the plastids of the highly developed vascular plants.

The name potato originally referred to a type of sweet potato rather than the other way around, although there is actually no close relationship between the two plants.

In many of the chronicles detailing agriculture and plants, no distinction is made between the two.

It is, indeed, obvious that the presence of gemmules in the blood can form no necessary part of my hypothesis ; for I refer in illustration of it to the lowest animals, such as the Protozoa, which do not possess blood or any vessels ; and I refer to plants in which the fluid, when present in the vessels, cannot be considered as true blood.

As for other animals, plants, or other entities, their ability to feel physical pain is at present a question beyond scientific reach, since no mechanism is known by which they could have such a feeling.