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pbio final exam
| Question | Answer |
|---|---|
| The innermost layer of the pollen sac wall is the | tapetum |
| Synergids produce chemicals that attract the pollen tube | True |
| By definition, an indehiscent fruit | does not break open at maturity |
| In the process of double fertilization, one sperm fuses with the ______, and the other sperm fuses with the ______ | egg; polar nuclei |
| The daughter cells produced by a microsporocyte are | microspores |
| In the process of pollination, the: | pollen passes from the anther to a stigma. |
| In angiosperms and most gymnosperms, the entire megagametophyte is the pollen grain. | False |
| The scar left on the seed coat after the seed has separated from its funiculus is called the: | hilum |
| The stem-like axis above the cotyledon(s) is the: | epicotyl |
| An example of connation is the union of stamens with: | other stamens |
| All seed plants are heterosporous | True |
| After fertilization, the integuments develop into the: | seed coat |
| In axile placentation, the ovules are borne | on a central column of tissue in a partitioned ovary |
| In seed plants, the ______ is called the nucellus. | megasporangium |
| In angiosperms, the ovary develops into a(n): | fruit. |
| The perianth consists of all the ______ of a flower. | sepals and petals |
| With the evolution of the ovule, the unit of dispersal shifted from the megaspore to the | seed |
| Which of the following statements concerning the maturation phase of seed development is FALSE? | Cell division in the embryo accelerates. |
| The style connects the _____ to the ______. | ovary; stigma |
| The portion of a carpel that encloses the ovules is the: | ovary. |
| The ______ is usually the first structure to emerge from a germinating seed. | root |
| All of the parts below make up the pericarp, except for: | fruitocarp |
| In flowers with sepals, petals, and stamens attached below the ovary, the ovary is said to be: | inferior |
| A flower that has only stamens and petals is: | imperfect and incomplete. |
| In pines, a megaspore mother cell divides to give rise to four ______, of which ______ disintegrate(s). | megaspores; three |
| ______ produce motile sperm. | Cycads and Ginkgo |
| The mature megagametophyte consists of ______ nuclei and _____ cells. | 7: 8 |
| A monoecious plant has: | staminate and carpellate flowers on the same plant |
| In most angiosperms, petals are probably evolutionary derivatives of: | stamens |
| A seed develops into an ovule. | False |
| A perfect flower contains: | carpels and stamens. |
| Sporopollenin is the primary constituent of the: | exine |
| In most angiosperms, the primary endosperm nucleus is: | 3n |
| A micropyle is a(n) | opening in the megaspore wall |
| Which of the following statements about most bat-pollinated flowers is FALSE? | They produce copious nectar. |
| In epigeous germination, which structure emerges above ground first? | epicotyl |
| When the zygote first divides, the two daughter cells are the ______ cell and the ______ cell. | proembryo; suspensor |
| Which of the following is NOT an evolutionary trend in the vascular plants? | Increased prominence of antheridia and archegonia |
| The grains typical of the grass family Poaceae are a type of fruit known as a: | caryopsis. |
| _____ are found at the chalazal end of the embryo sac. | Antipodals |
| The gynoecium consists of all the ______ of a flower. | carpels |
Created by:
emma.boc
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