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Diversity Of Life: 6

A deck of flashcards for Undergraduate Study of Biology. Source: Wikipedia

The estimate age of the universe 13.7 billion y.a.
Big bang theory It suggests that the universe formed from a sudden explosion, out of nothing.
The estimate age of the earth 4.5 billion y.a
How was earth made? Formed from the condensation of gas and dust from an older exploding star (a supernova). It became molten rock which were constantly hit by meteorites. Overtime, the earth cooled until it solidified.
Early earth atmosphere consisted of:- Methane, ammmonia and hydrogen sulphide.
What condition did earth start with? Abiotic conditions where there was a phase of chemical evolution where inorganic chemical compounds reached to form simple organic compounds that allowed life.
The Miller-Grey experiment (1953) It is an experiment conducted by Stanley Miller and Harold Urey where they recreated early earth in a lab, completed with discharged sparks into glasses believed to be present in early atmospheres.
When were the first cells believed to have been formed? In the Archeon eon.
What kingdom does algae belong to? Protists
What are the three phyla of algae? Phylum Cholorophyta (green algae), Phylum Rhodophyta (red algae) and Phylum Phaeophyta (brown algae).
Bryophytes Non-vascular plants. The 3 phyla included are the hepatophyta (liverworts), antrocerophyta (hornworts) and bryophytas (mosses).
Evolution of leaves Started with microphylls (spine-shaped, single veined) into megaphylls (larger with many veins)/
Homosporous spore production Spore production where only one type of spore is made for both egg and sperm (bisexual gametophyte).
Heterosporous spore production Spore production that produces megaspores (female) and microspore (male).
Monoecious Both male and female structures on the same plant.
Dioecious Male and female structures on different plants.
Abiotic pollination Pollination through an inanimate physical force.
Biotic pollination Pollination through a living organism.
Created by: theecloud



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