Which of the following would most likely change the current classification of two closely related flower species to a single species?

a. the discovery of a new, related species
b. the collection of seeds from each species
c. an analysis of photosynthesis for each species
d. an analysis of the dna sequence of each species

The answer is:

d. An analysis of the DNA sequence of each species.

The reason being is that every living organism has it's own specific kind of DNA pattern, which can be determined through DNA testing.

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

answer: grassland biomes are closer to the equator and receive more rain.

grasslands are biomes that are dominated by grasses rather shrubs and trees. savanna are biomes that exhibit grasses, shrubs and small tree as vegetation. grasslands are located near the equator of the earth. these are found in north america. savanna biomes are found in africa, south america, australia and india. grassland exhibit moderate climatic conditions, it receives   amount of rainfall higher than savanna.   therefore, savanna exhibit dry and hot climatic conditions.