Early earth was dominated by cells that satisfy their energy requirements by consuming the organic compounds produced by external sources
What is heterotrophs
100
This adaptation anchors plants and collects water required for maintenance of plant body and photosynthesis
What are roots
100
Least specialized plant cells
What is parenchyma cells
200
Simple cells, lack nuclear envelop and membrane bound organelles
What is a prokaryote
200
These open and close in response to environmental and physiological signals and help the plant maintain a balance of water loss and it’s oxygen and CO2 requirement
What is stomata
300
This opened the way to a much more efficient utilization of the energy-rich organic molecules formed by photosynthesis than any anaerobic process.
What is the increase of free O2
300
Channels a variety of substances between the photosynthetic and non-photosynthetic art of the plant body
What is the vascular system
400
At this time there was enough ozone in Earth's atmosphere to absorb UV rays and protected organisms so that they could survive the in the surface of water and on shores
What is 450 mya
400
These elements that are need for plant growth: N,S,P, K, Ca, Mg
What is macronutrients
500
This allows for the evolution of complex, multicellular structures in which the gametes are protected from drying out (i.e. pollen grains)