D&E Biology Chapter 30 Question with 100 % correct answers | Verified

Part A All seed plants _____. - are heterosporous Correct: All seed plants produce separate male and female spores. Part A An ancient date palm seed germinated and grew into a healthy plant. What was the source of nutrients for the young sporophyte embryo during germination of the date palm seed? - food stored within the seed Correct: A seed consists of an embryo and a food supply, packaged in a protective seed coat derived from the integument(s). Part A Angiosperms are different from all other plants because only they have _____. - flowers Correct: Angiosperms are recognized on the basis of being flowering plants. Part A Consider the seed shown in this figure. Select the correct description of this seed. - A seed includes contributions from three separate generations of plants. Correct: In addition to a sporophyte embryo, a seed has a seed coat derived from the integuments of the "grandparent" sporophyte and a food supply derived from the tissues of the "parent" gametophyte. Part A Gymnosperms were most abundant during the _____. - MesozoicCorrect: Gymnosperms were the dominant plants of the Mesozoic. Part A Human survival literally depends on the produce of _____. - angiosperms Correct: Angiosperms are the source of our major food crops, including rice, wheat, maize, and barley. They also provide cotton and linen, and medicines such as digitalis and codeine. Rubber, coffee, chocolate, and aromatic oils come from flowering plants. Woods such as oak, cherry, and walnut are derived from angiosperms. Part A In gymnosperms megaspores develop into _____ . - female gametophytes Correct: Even though the gametophyte stage of alternation of generations is minimized in gymnosperms and angiosperms, spores still give rise to gametophytes. Part A In pine, the embryo develops within the _____. - female gametophyte Correct: Large ovulate cones make megaspores that develop into female gametophytes, where one fertilized egg will develop into an embryo. Part A Indicate whether each description applies to a specific group of gymnosperms or to all gymnosperms. Drag each item to the appropriate bin. - Correct: Gymnosperms (literally "naked seeds") are vascular plants that produce seeds that are not enclosed in an ovary. Like other land plants, gymnosperms have a life cycle called alternation of generations. The four main groups of gymnosperms are cycads, ginkgos, gnetophytes, and conifers. Cycads have palm-like leaves. Ginkgos, represented by one surviving species, have deciduous, fanlike leaves.Gnetophytes include a variety of plants in three genera. Conifers, including redwoods, pines, and cypresses, have needle-like or scaly leaves and produce seeds in cones. Part A Ovules are found within structure _____. - B Correct: Ovules are housed within ovaries. Part A Unlike most angiosperms, grasses are pollinated by wind. As a consequence, some unnecessary parts of grass flowers have almost disappeared. Which of the following parts would you expect to be most reduced in a grass flower? - petals