Exam 30: Seed Plants

Which feature of cycads makes them similar to many angiosperms?

What type of cell division does the generative of a male angiosperm gametophyte cell undergo to produce sperm cells?

In angiosperms, which of the following is correctly paired with its chromosome count?

Which of the following characteristics is functionally important in gametophyte cells of both angiosperms and gymnosperms?

Which adaptations of land plants are likely to cause human health problems?

Many types of plants produce fruit which is eaten by animals. The seeds of these plants are typically undigestible. Which of the following is an advantage for plants having undigestible seeds?

Mistletoe is a plant that lives on trees and gains nutrition from them (that is, it is a parasite). The fruit of the mistletoe is a one-seeded berry and is consumed by birds. In members of the mistletoe genus Viscum, the outside of the seed is sticky, which permits the seed to adhere to surfaces such as the branches of host plants or the beaks of birds. What should be expected of the fruit if the stickiness of Viscum seeds is primarily an adaptation for dispersal rather than an adaptation for infecting host plant tissues?

Which of the following statements are correct with regard to what physicians and pharmacists need to know about plants?

Which of the following plant structures most directly produces the pollen tube of angiosperms?

Use the information to answer the following question. Scarlet gilia (Ipomopsis aggregata) usually has red flowers. In certain populations in the Arizona mountains, however, the flowers range from red to pink to white. In early summer, most (but not all) of the flowers were red. Six to eight weeks later, the same individual plants were still present; the flowers ranged from pink to white, and few red flowers were present. The major pollinators early in the season were two species of hummingbirds active during the day; they emigrated to lower elevations, and the major pollinator later in the season was a hawk moth (a type of moth). The hawk moth was most active at sunset and later, and it preferred light pink to white flowers after dark. When hummingbirds were present, more red flowers than white flowers produced fruit. When only hawk moths were present, more white flowers produced fruit. Which of the following proposed controls would be most appropriate for the experiment when, late in the season, scientists painted some of the red flowers white?

Which of the following could best be investigated by measuring fruit production in plants?

Use the information to answer the following question. Oviparous (egg-laying) animals have internal fertilization (sperm cells encounter eggs within the female's body). Yolk and/or albumen is (are) provided to the embryo, and a shell is then deposited around the embryo and its food source. Eggs are subsequently deposited in an environment that promotes their further development, or are incubated by one or both parents. The yolk of an animal egg is similar to which of the following structures in angiosperms?

Which of the following answers arranges the structures found on male pine trees from the largest structure to the smallest?

Which of the following arranges the structures from largest to smallest, assuming that they belong to two generations of the same angiosperm?

Which of the following functions is an advantage of seeds compared to spores?

Which of the following structures directly produces the fruit of angiosperms?

Which of the following are present in angiosperms but not in gymnosperms?

Use the information to answer the following question. Açai berries come from trees that are native to the Amazon River Basin and now are the basis of many popular fruit drinks. Farmers with small areas harvest the berries in their family farms. Sometimes, they plant additional açai trees, weed out underbrush, and remove other trees in an effort to increase açai production. A recent study compared the forest characteristics of unmanipulated plots versus those where the farmers modified the plants in the plots. This study produced the following results: Which of the following conclusions are most consistent with the data?

Which of the following structures in an angiosperm is triploid?

In onions (Allium), cells of the sporophyte have 16 chromosomes within each nucleus. How many chromosomes should be in a generative cell nucleus?