Question 1

Some dioecious species have the XY genotype for male and XX for female. After double fertilization, what would be the genotypes of the embryos and endosperm nuclei?

Accepted Answer

The answer of Some dioecious species have the XY genotype...

Question 2

"Golden Rice"

Accepted Answer

"Golden Rice" is genetically modified to contain daffodil genes that increase the amount of vitamin A in the rice. This is important because vitamin A deficiency is a serious health problem in many parts of the world, particularly in areas where rice is a staple food.

Question 3

Which statement concerning grafting is correct?

Accepted Answer

Stocks provide the root system for grafting, while scions provide the stem and leaves.

None of the other statements are correct. A) Stocks and scions should come from the same species, or at least from closely related species; B) Stocks and scions can come from both vines and trees, depending on the desired outcome; D) Grafting does not create new species; and E) Stocks and scions should come from related species in order to ensure successful grafting.

Question 4

A small flower with green petals is most likely

Accepted Answer

A small flower with green petals is most likely wind-pollinated. This is because wind-pollinated flowers do not require bright colors or nectar to attract pollinators since the wind carries the pollen from one flower to another. The green petals are typically used for protection and support, rather than attraction.

Question 5

The black dots that cover strawberries are actually individual fruits. The fleshy and tasty portion of a strawberry derives from the receptacle of a flower with many separate carpels. Therefore, a strawberry is

Accepted Answer

Strawberries are considered aggregate fruits because they form from a flower with multiple ovaries, each of which develops into a small fruit (the "black dots" or achenes). They are also accessory fruits because the edible part comes from the receptacle of the flower, not from the ovaries themselves.

Question 6

The pollen produced by wind-pollinated plants is often smaller than the pollen produced by animal-pollinated plants. A reason for this might be that

Accepted Answer

Smaller pollen grains can be carried farther by the wind. Wind-pollinated plants rely on the wind to distribute their pollen and so produce smaller, lighter pollen that is better suited for transport by air currents. Animal-pollinated plants, on the other hand, generally produce larger, heavier pollen that is better suited for transport by animals such as bees and hummingbirds.

Quiz 38: Angiosperm Reproduction and Biotechnology