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Plant Science Exam 1
| Question | Answer |
|---|---|
| The Genus and species of wheat is Triticum aestivum. What additional level of classification is used to represent different types of plants that are the same Genus/species? a. family b. cultivar c. order d. kingdom e. division | b. cultivar |
| An important part of the Botanical Classification System for plants is the two sub-classes called monocots and dicots. What is another, common term used to describe a monocot plant? a. broadleaf b. grass c. algae d. moss e. all are correct | b. grass |
| A plant whose growth is only soft, succulent tissues in the stem, the opposite of a woody plant. a. gymnosperm plant b. herbaceous plant c. boreal plant d. quiescent plant e. none are correct | b. herbaceous plant |
| This is the most common climatic classification of plants in the United States, which includes plants that are able to grow in a location with a significant winter climate. a) tropical plants b) subtropical plants c) temperate plants d) boreal plants | c. temperate plants |
| We discussed that carbon is a major part of plant composition. From where do plants obtain this important element of carbon? a) from soil microbes b) from the atmosphere c) from soil minerals d) from water | b. from the atmosphere |
| Which of the following is a plant that is able to reproduce and spread asexually, which means it can produce additional plants besides just making seeds? a) biennial b) simple perennial c) creeping perennial d) woody perennial | c. creeping perennial |
| After water is absorbed, what is activated during the first phase of seed germination? Options: a) enzymes such as amylase b) cell division processes c) growth of the radicle d) new stem growth | a. enzymes such as amylase |
| Which of the following is NOT an important factor that influences planting decisions like seeding rate choice, depth choice, and consistency of spacing between seeds? a) seed shape b) seed size c) seed color d) seed germination percent | c. seed color |
| What seed part is the primary source of stored energy in monocot plants like wheat? a) seed coat b) cotyledon c) endosperm d) epicotyl | c. endosperm |
| Which of the following is a type of seed dormancy? a) hard seed coat b) immature embryo c) presence of inhibitory chemicals d) all are correct | d. all are correct |
| Roots always grow downward and shoots upward. What is the type of tropism that describes plant growth that responds to gravity? a) geotropism b) phototropism c) thigmotropism d) hydrotropism e) thermotropism | a. geotropism |
| Sunflower heads in a field always face the same direction, towards the sun. What is the type of tropism this represents? a) geotropism b) phototropism c) thigmotropism d) hydrotropism e) thermotropism | b. phototropism |
| What is the term for a seed that is alive and capable of germinating? a) boreal b) herbaceous c) viable d) vascular e) intercalary | c. viable |
| What is the purpose of apical and axillary buds? a) increase the size/girth of a root b) increase the length of a stem c) to produce a new plant part such as a new root, stem, leaf or flower d) to move water and nutrients in the plant | c. to produce a new plant part such as a new root, stem, leaf or flower |
| A biennial plant life cycle takes two years to complete and then the plant dies. Describe the type of growth that occurs during Year 1 and then the type of growth that occurs during Year 2. | Year 1: Vegetative growth — seed germinates in spring, grows vegetatively until winter, then goes dormant. Year 2: Reproductive growth — in spring, plant breaks dormancy, continues to grow, produces flower and seeds, then dies at the end of year 2. |
| Where are the 3 major parts of the corn located. Seed coat, endosperm, and embryo | Seed coat: outside portion Endosperm: Majority of seed-source of starch Embryo: lesser portion-source of new plant parts |
| Why do dicot plants like beans and canola contain a much higher percentage of oil and protein compared to monocots like corn or wheat? | Dicots don’t have an endosperm (the starch source in monocots). Therefore, dicots aren’t as capable of producing as much starch and instead focus on producing oil and protein. |
| List 3 of the 4 environmental conditions that influence whether seed germination occurs. | Light, temperature, water, oxygen |
| In general, what time of year does the seed of a winter annual plant germinate? | Fall |
| In general, what time of year does a winter annual plant reach maturity? | Summer |
| List 3 major uses of plants. | Food, feed for animals, fuel, clothing |
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