All of the following are reasons that Mendel chose the pea plant as a model system for his studies EXCEPT .

Mendel choose the pea plant for his experiment. The correct option is D.  All the reasons given are correct except peas only reproduce by cross-fertilization.

Reason Mendel choose the pea plants:

Pea plants also reproduce by the self- pollination.

Therefore, All the reasons given are correct except peas only reproduce by cross-fertilization.

To more about the Mendel's experiments,

link

The group of choices is:

peas have a relatively short generation time

peas produce large numbers of seeds

he could control which parents were involved in mating

peas only reproduce by cross-fertilization

peas have many polymorphic traits

The correct answer is - peas only reproduce by cross-fertilization

Explanation:

Pea plants not just produced by cross-pollination but self-pollination is also one of the reproduction methods present in it. Pea plants have many type of characteritics or traits that can be controlled by the researcher in parent plants during the mating process.

The generation is relatively short which helps in the study the pattern of inheritance of the traits up to several generations.

Thus, the correct answer is - peas only reproduce by cross-fertilization

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.

i think that it is plants