Exam 38: Reproduction of Flowering Plants

During pollination, multiple pollen grains are delivered to the stigma. Which of the following phenotype traits provides the greatest selective advantage for successful fertilization?

Which statement concerning grafting is correct?

In a species showing sporophytic incompatibility, which type(s) of pollen could successfully fertilize an S2S3 flower?

Early in the spring, a gardener's bare plot was weed free. Three days after turning over the soil, she was amazed to see dozens of tiny weed seedlings. Which answer gives the most likely reason these weeds germinated?

How many nuclei are contained in a typical angiosperm embryo sac (female gametophyte)?

A pineapple is composed of fused carpels from multiple flowers. Botanically, a pineapple is which kind of fruit?

If the egg of a plant has a haploid chromosome number of 12 (n = 12)which of the following statements is true about the number of chromosomes in the cells of other tissues of this plant?

A fruit is ________.

Which of the following types of flowers are incapable of self-pollination?

Which of the following could be considered an evolutionary advantage of asexual reproduction in plants?

If an ovary contains 50 ovules, what is the minimum number of pollen grains that must land to form 50 mature seeds?

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

Suppose that 100 pollen grains land on a stigma, and 50 mature seeds are formed in the fruit. What does this indicate about the pollination process and success?

Which of the following structures is unique to flowering plants?

In many fruits it is commonly observed that some ovules become mature seeds, whereas other ovules do not. Which of the following conclusion(s) is/are supported by this observation?

The Brazil nut tree, Bertholletia excelsa is a tall tropical tree with pale yellow flowers that cannot fertilize themselves. Which of the following is the most likely pollinator?

Which of the following plant reproductive structures is correctly paired with its life cycle generation?

Following meiosis in a typical dicot ovule, a single surviving megaspore divides how many times and how many nuclei are ultimately produced?

In plant biotechnology, if a new plant is grown from a single cell, the original cell must be which of the following?