Primroses have white flowers when grown above 32°c but red flowers when grown at 24°c. this interaction between phenotypic expression and environment is an example of

The interaction between phenotype expression and the environment is an example of enviromental influences

Phenotype exists in the same population of species called polymorphic. Polymorphism which documents  Labrador Retriever colouring and genes which depends on the coated colour. Anything which depends on phenotype is genotype which includes genetic material codes molecules and structures which are not visible.

The right answer is environmental influences.

In addition to human influences, there is also an environmental influence on plants, such as weather and climate influences.

There are three main climatic factors, essential for plant life, which come into play when we consider the distribution of the major types of vegetation on the surface of the globe: heat, light, and humidity. The most important is the heat.

thats not even an aswer choice

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.