Exam 38: Angiosperm Reproduction and Biotechnology

Regardless of where in the world a vineyard is located, for the winery to produce a Burgundy, it must use varietal grapes that originated in Burgundy, France. The most effective way for a new California grower to plant a vineyard to produce Burgundy is to ________.

In a multicellular organism, any cell that can divide and generate a/an ________ of the original organism is called to be totipotent.

Retaining the zygote on the living gametophyte of land plants ________.

Which of the following is the correct order of floral organs from the outside to the inside of a complete flower?

The egg of a plant has a haploid chromosome number of 12 (n = 12). What is true about the number of chromosomes in the cells of other tissues of this plant?

"Bt maize"

Among plants known as legumes (beans, peas, alfalfa, clover, for example), the seeds are contained in a fruit that is itself called a legume, better known as a pod. Upon opening such pods, it is commonly observed that some ovules have become mature seeds, whereas other ovules have not. Thus, which of the following statements is (are) true? 1)The flowers that gave rise to such pods were not pollinated. 2)Pollen tubes did not enter all of the ovules in such pods. 3)There was apparently not enough endosperm to distribute to all of the ovules in such pods. 4)The ovules that failed to develop into seeds were derived from sterile floral parts. 5)Fruit can develop, even if all ovules within have not been fertilized.

A small flower with green petals is most likely

Use the following information to answer the question. The Brazil nut tree, Bertholletia excels (n = 17), is native to tropical rain forests of South America. It is a hardwood tree that can grow to over 50 meters tall, is a source of high-quality lumber, and is a favorite nesting site for harpy eagles. As the rainy season ends, tough-walled fruits, each containing 8-25 seeds (Brazil nuts), fall to the forest floor. Brazil nuts are composed primarily of endosperm. About $50 million worth of nuts are harvested each year. Scientists have discovered that the pale yellow flowers of Brazil nut trees cannot fertilize themselves and admit only female orchid bees as pollinators. The agouti (Dasyprocta spp.), a cat-sized rodent, is the only animal with teeth strong enough to crack the hard wall of Brazil nut fruits. It typically eats some of the seeds, buries others, and leaves still others inside the fruit, which moisture can now enter. The uneaten seeds may subsequently germinate. Animals that consume Brazil nuts derive nutrition mostly from tissue whose nuclei have how many chromosomes?

During the alternation of generations in plants, ________.

Double fertilization in angiosperm embryo sac produces endosperm, a food-storing tissue of the seed. The genetic makeup of endosperm is ________.

In a typical dicot ovule, a surviving megaspore divided by ________ consecutive mitotic divisions without cytokinesis results in ________ nuclei.

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

Before plowing a field, a farmer thought the bare field looked weed-free. Three days after plowing and turning over the soil, he was amazed to see thousands of tiny seedlings. What is the most likely reason for the mass germination of seeds?

In a typical angiosperm, what is the sequence of structures encountered by the tip of a growing pollen tube on its way to the egg? 1) micropyle 2) style 3) ovary 4) stigma

Which of these activities is part of the development of crop plants from wild relatives? I.people planting seeds of the plants with the characteristic wanted II.people making observations of desired plant characteristics III.people eating products from only the plants with desired characteristics IV.people developing several varieties of crops from a wild relative

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

The generative cell of male angiosperm gametophytes is haploid. This cell divides to produce two haploid sperm cells. What type of cell division does the generative cell undergo to produce these sperm cells?

Cottonwood, aspen, and willow trees have beige flowers, with no petals, that appear before the tree's leaves are out in the spring; and they are dioecious. What does this indicate about these trees?

Which of the following is a potential advantage of introducing apomixis into hybrid crop species?