Which of these are examples of negative tropism? (Select all that apply.) Plant roots growing toward a water source due to hydrotropism. Plant leaves and stems growing away from light due to phototropism. Plant leaves and stems growing toward light due to phototropism. Plant roots growing down into the dirt due to gravitropism. Plant roots growing toward the surface of the soil due to gravitropism. Plant roots growing away from a water source due to hydrotropism

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .

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