algae-vegetation
41Timeline of plant evolution — This article attempts to place key plant innovations in a geological context. It concerns itself only with novel innovations and events that had a major global significance, not those that are of solely anthropological interest. The timeline… …
42river — river1 riverless, adj. riverlike, adj. /riv euhr/, n. 1. a natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels. 2. a similar stream of something other than water: a… …
43Nature — This article is about the physical universe. For other uses, see Nature (disambiguation). Natural and Natural World redirect here. For other uses, see Natural (disambiguation). See also: Natural environment Hopetoun Falls, Australia …
44perciform — ▪ fish order Introduction any member of the order Perciformes, a group of bony fishes with more than 6,000 species placed in about 150 families. The order is the largest group of fishes in the world today. Perciform fishes occur in… …
45tropical rainforest — Introduction also spelled tropical rain forest luxuriant forest, generally composed of broad leaved trees and found in wet tropical uplands and lowlands around the Equator. Rainforests are vegetation types dominated by broad leaved trees …
46Oxygen — This article is about the chemical element and its most stable form, O2 or dioxygen. For other forms of this element, see Allotropes of oxygen. For other uses, see Oxygen (disambiguation). nitrogen ← oxygen → fluorine ↑ O ↓ …
47Marine habitats — Coral reefs provide marine habitats for tube sponges, which in turn become marine habitats for fishes Littoral zone …
48Sea of Azov — at Novaya Yalta, Donetsk Oblast …
49List of The Future Is Wild species — This is a list of possible species postulated in the 2003 Animal Planet/ORF and ZDF series The Future Is Wild . The series examined twelve ecosystems at three distant future times.Five million yearsAfter the warm time period of humanity s reign a …
50polar ecosystem — Introduction complex of living organisms in polar regions such as polar barrens and tundra. Polar barrens and tundra are found at high latitudes on land surfaces not covered by perpetual ice and snow. These areas lying beyond the tree line …
