In a given population of plants there is variation in the time of day when flowers open. Those individual plants with flowers that open at night would be more likely to pass on this trait in an environment dominated by what?

The question is incomplete as it does not have the options which are:

Solar radiation

Nocturnal pollinators

Moist soil

Grazing animals

Nocturnal pollinators

Explanation:

Flowers are the reproductive organ of the flower which encloses the reproductive organs in very colourful petals which produce fragrance.

The colour of the petals, the fragrance, the nectar production and the opening of the flower are the result of the evolutionary adaptations under the force of natural selection (pollinators).

The flowers which open at night time are found in the areas where the nocturnal species are found in the highest number. The flower in this area opens at night with fragrance and the white petals so that they can attract the nocturnal pollinators.

Thus, Nocturnal pollinators are correct.

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.