What are the seven basic requirements plants need to grow properly?

Following are the seven basic requirements of plants to grow properly.

1) Light: Light is the basic need of plant. With the help of light, photosynthesis occurs.

2)Water: Water is used by the plants as a reactant in making their own food.

3) Temperature: In optimum temperature, plants grow fast.

4) Time: There is proper time for the sowing of every plant.

5) Nutrients: Nutrients are food of plants which are used for their growth and development.

6) Proper place or medium: Plants require a soft nutritious soil for germination.

7) Air: Plants need air because it contains oxygen and carbondioxide which is used by the plants during photosynthesis and respiration.

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.