CH 38

Why do fleshy fruits often have seeds with very tough seed coats? a. So the seeds can adhere to passing animals b. So the seeds can be dispersed by propulsion c. So the seeds can extend the distance they travel by catching breezes d. So the seeds can survive the mechanical forces and conditions in an animal's gut

What characterizes the fruit of seeds that are dispersed by the wind? a. They are large. b. They have structures to extend the distance they travel on the wind. c. They are very fleshy. d. They contain a large amount of sugar.

Which part of a flower develops into the seed? a. Pericarp b. Ovule c. Carpel d. Endosperm cell

Which term describes the portion of a peach that can be eaten by humans? a. Pericarp b. Endosperm c. Seed coat d. Zygote

In angiosperms, each pollen grain produces two sperm. What do these sperm do? a. One fertilizes an egg, and the other is kept in reserve. b. Each one fertilizes a separate egg cell. c. One fertilizes an egg, and the other combines with two polar nuclei, which develop into stored food cells (endosperm). d. One fertilizes an egg, and the other fertilizes the fruit. e. Both sperm fertilize a single egg cell.

Which of the following is an advantage of asexual reproduction in plants? a. enhanced seed dispersal b. no need for a pollinator c. more robust offspring d. genetic variation e. enhanced survival of genetically favorable offspring

Which example below is a concern related to the debate over plant biotechnology? a. increased depletion of soil nutrients b. introduced genes spreading into related wild species and leading to the creation of "superweeds" c. increased reliance on petrochemical fertilizers d. transfer of genes to animal herbivores e. reducing availability of enhanced crops to third-world nations

Self-incompatibility _____. a. does not have potential agricultural applications b. works the same way in all plants c. is based on the same mechanism of transplant rejection seen in animals d. is the rejection of a graft by a plant e. helps maintain genetic variability in a population

Which part of a plant attracts pollinators? Which part of a plant attracts pollinators? a. Petals b. Stamen c. Carpel d. Sepal

Which process involves the transfer of pollen grains from an anther to a stigma? a. Fertilization b. Germination c. Gametogenesis d. Pollination

The food supply for the embryo

Which term describes the male gametophytes of flowering plants? a. Pollen grains b. Micropyle c. Megaspores d. Microsporocytes

Which structure formed by the male gametophyte allows sperm to reach the ovary of a flowering plant? a. Micropyle b. Pollen tube c. Stigma d. Anther

Which of the following statements about seed formation in a flowering plant is true? a. Hypocotyls are the seed leaves of the embryonic plant. b. The swellings that develop into cotyledons are located at the end of the embryo on top of the row of single cells. c. The basal cell formed from mitosis of the zygote divides to form a globular mass that is the route for nutrient transfer to the developing embryo. d. The terminal cell formed from mitosis of the zygote divides to form a row of single cells that eventually forms the embryo.

The pointer is indicating a diploid cell that develops into the _____. a. endosperm b. ovule c. seed coat d. embryo e. carpel

Fruits evolved primarily as structures specialized to _____. a. provide food for humans b. protect pollen c. protect seeds d. disperse seeds e. provide a source of food to the plant's embryo