The number of chromosomes. For example, humans have 46.
the particle size of the sediments within the rock
These two organisms cannot be asexual, if so then they need no mate. In order to reproduce they would need one organism to have male reproductive organs and the other organism to have female reproductive organs. This way they can reproduce sexually. The two organisms must also be of the same species. For example, a male dog and a female cat can't mate, but two heterosexual dogs can.
A system that groups organisms by ancestry
The moon determines if there will be high or low tides.
They are the related because the levels of classification start with Kingdom which is the biggest and end with species which is the smallest. The evolutionary relationships start with many animals or humans and works its way down to one animal or human.
The most important characteristic is the polarity of the solvent and solute.
A species is a group of closely related organisms. Organisms belong to the same species if they can mate and produce fertile offspring. A lion and tiger are not the same species because they can make a liger, but it will not be fertile.
the particle size of the sediments within the rock
This is cheating. *AP Enviromental Science
because it determines whether a species will evolve to keep up with its predator or prey
Two species are typically placed in the same genus based on shared physical characteristics, genetic similarities, and common evolutionary ancestry. Taxonomists consider a combination of these factors when determining the classification of species into different genera.
Whether your foot is on it or not.
The moon determines if there will be high or low tides.
A system that groups organisms by ancestry
These two organisms cannot be asexual, if so then they need no mate. In order to reproduce they would need one organism to have male reproductive organs and the other organism to have female reproductive organs. This way they can reproduce sexually. The two organisms must also be of the same species. For example, a male dog and a female cat can't mate, but two heterosexual dogs can.
Comparisons of appearance, comparisons of structure, and comparisons of DNA and proteins.
If two organisms are able to mate and produce fertile offspring, then they are of the same species.Horses and donkeys are two different species because if they mate, they produce a mule which is sterile (not fertile). This shows horses and donkeys are of different species.