All of the above
Mendel did not come up with Punnett Squares, but used them in his experiments.
Mendel did not come up with Punnett Squares or use them in his experiments, Punnett Squares were invented later.
Mendel came up with and used Punnett Squares in his experiments.
Chromosome numbers, size and shape is different from species to species.
The importance of Mendel's paper, Experiments in Pea Hybridization, was instantly recognized and appreciated by the scientific community.
They had many different visible traits
They grew quickly and in large amounts
Their mating was easy to control
They were easy to grow
In a farmer's nearby field
At a monastery
At his home
At a university
Survival of the fittest
Deciding what time of year is best to plant vegetables.
Looking at the size and shape of chromosomes in a cell.
Deciding how much water to give pea plants.
Predicting what the offspring will look like when mating plants and animals.