The best answer here is they show seasonal difference in flowering. if they self pollinated they could still interbreed assuming they flower in the same seasons
Nicotine, once in the brain, will work specifically on nicotinic receptors in the brain. However, there is a common "addiction" pathway in the brain that pretty much all addictive substances go through.
Radiation is used for X-rays, MRIS, any type of cancer killing.
Too much of radiation can be a dangerous thing... you could end up dying from a lot of exposure.
The correct answer is they are produced by cyanobacteria.
Stromatolites are being produced by cyanobacteria.
Stromatolites are termed as layered mounds, which have columns and also sheet like rocks which are originally formed with growth of layers.
Lichen stromatolites is a type of stromatolite which is formed by layered structures rocks and they are formed above water.
The best phrase is 'natural selection is a process that causes evolution '. Natural selection can also be referred to as selection pressures within a population that favour particular traits that enable the population to better adapt to its habitat. It's could be better camouflage, high sense of smell, and etcetera. These traits are preserved while those that cause disadvantage are diminished. This causes evolution of the population .