Created by Wes Smalley
almost 6 years ago
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Question | Answer |
What are some of the greatest threats to biodiversity? | Alteration/Loss of Habitat Introduction of Non-native Spp Over-harvest |
A plant is non-native if | It wasn't found in the area before European settlement. |
A naturalized plant | is non-native and reproduces on its' own. |
What are some ways non-native species are introduced? | Human introduction Natural Phenomena (Storms, etc.) |
An endemic species | occurs natively in only one area, and lives in a limited range. |
Are all non-native species also naturalized or invasive? | Non-native species aren't necessarily naturalized or invasive if they don't reproduce after introduction. Most non-natives are this way. |
What portion of wild plants in the US are naturalized non-natives? | ~25% |
Problems that can be caused by invasive species: (For example, Autumn Olive- Eleagnus umbellata) | Heavy fruit production Wide dispersal Competitive vs Natives Suppresses other native species *plant cover Adversely impact nutrient cycles |
Plant Cover is | The relative area covered by different plant species. |
Why is plant cover important? | Protection from predators and the elements, and for nesting. |
Name some advantages to native plants | -Adaptation to local ecosystems' abiotic and biotic factors -Prevent homogenization -Useful for wildlife (food, cover, proper seed dispersal, etc.) -Co-evolution |
Why does all other life depend on plants? | Plants produce bio-available energy from sunlight. |
Structure of native plants is important because | animals use a particular structure for cover or nests in addition to food sources. |
What structure does the Yellow Warbler (Setophaga petechia) nest in? | Vertical crotches with 3 or more small, spreading branches. |
What structure do Red-Eyed Vireos (Vireo olivaceus) nest in? | A horizontal "Y" in smaller branches |
What structure do cedar waxwings use to nest? | Large, horizontal branches or limbs. |
What do Red-winged Blackbirds normally use for nests? | Cattails |
When Purple Loosestrife (Lythrum salicaria) invades cattail stands, why do nests fail more often for RWBB's? | Predation rates increase because Purple Loosestrife is easier to navigate through. |
How could the invasion of Purple Loosestrife impact the nesting of other species, such as the Marsh Wren (Cistothorus palustris)? | It could impact the timing for nesting birds, even preventing viable nesting entirely. |
Why do non-native species succeed if they're not superior to the native competition? | No natural enemies Hybridization with native subspecies |
Bryophytes are | non-vascular plants, like liverworts or mosses. |
SVP's are | Seedless Vascular Plants, like ferns. |
Gemnosperms are | vascular, non-flowering seed plants. |
Angiosperms are | vascular, flowering seed plants. |
List the four major plant groups in phylogenetic order (oldest to newest) | -Bryophytes -Seedless Vascular Plants (SVP's) -Gemnosperms -Angiosperms |
Phylogeny of the Angiosperms includes: | Basal families, the magnoliid complex, monocots, and eudicots. |
Name characteristics of Monocots. | -Petals in multiples of 3 -Parallel leaf veins -One pore per pollen -Dispersed vascular tissue -One cotyledon, or embryonic leaf |
Name characteristics of Eudicots? | -Petals in multiples of 4 or 5 -Reticulate (netlike) leaf veins -3 pores per pollen -Vascular tissue occurs in a ring -2 cotyledons, or embryonic leaves |
Habit | Growth form of a plant. Can be Woody or Herbaceous, though some include Vines/Liannas as a separate habit. |
Distinguish between the 3 Life Histories | Annual: lives for 1 growing season Biennial: lives for 2 growing seasons Perennial: lives for 3 or more growing seasons |
Difference between opposite and alternate phyllotaxy (leaf arrangement) | Opposite = 2 leaves/node Alternate = 1 leaf/node, usually helical. |
Decussate | Type of opposite phyllotaxy where each pair of leaves is at a right angle to the pair below. |
Distichous | Form of alternate phyllotaxy where the leaf is on the exact opposite side of the stem as the ones above and below. 2-ranked. |
Whorled phyllotaxy | 3 or more leaves per node, often spiral shaped. |
Node | origin of a leaf from the stem |
Leaf Blade | Flat part of the leaf, sometimes called lamina |
Petiole | Stalk of the leaf. Sessile=no petiole. |
Stipules | Triangular, leaf-like structures at the base of some petioles. Some species don't have these. |
Difference between simple and compound leaves | Simple leaves have one blade, with an axillary bud at the base. Compound leaves have multiple leaflets which have no axillary bud. Instead, the axillary bud is at the base of the structure. |
Define the Leaf Margins | Smooth Toothed Lobed Dissected |
Difference between Pinnate and Palmate compound leaves? | Palmate leaves are radial, pinnate leaves are linear. |
How do you determine whether a leaf is 1x, 2x, or 3x compound? | Start at the base of the leaf, turning at each sub branch. Stop when you reach a leaflet. The number of turns how many times the leaf is compounded. |
What is a leaf sheath? And what group are they common in? | The base of the leaf blade, which wraps around the stem but doesn't fuse to it. Common in graminoids and other monocots. |
Leaf Scars are | Impressions on the node of a stem where the petiole of a leaf used to connect. You can often see bundles of vascular tissue here. |
Flowers are made of | Modified leaves. |
Peduncle | Stalk that holds the receptacle the flower sits in. |
Sepals | Green, leafy whorl that forms the Calyx. |
Petals | Showy modified leaves that sit above the sepals, forming the Corolla |
Ovary | Contains the ovule, or embryo. Sits on the receptacle, either above or below the petals. |
Style | Stalk leading up from the ovary. |
Stigma | Pollen collecting tip of the stigma. |
Filament | Stalk that leads from the receptacle to the anther. |
Anther | Pollen producing structure of the flower, located on the tip of the filament. |
Carpel | Female reproductive structure housing the ovary, stigma, and style. |
Perianth | Structure that includes petals and sepals (corolla and calyx) |
Stamen | Structure including the Filament and the pollen producing Anther |
What's the difference between Animal pollinated flowers, and wind pollinated flowers? | Animal pollinated flowers are showy, and produce nectar. Wind pollinated flowers aren't showy, with reduced petals. They produce large amounts of pollen, and have feathery stigma to catch it. |
Inflorescence are | Clusters of flowers from the same peduncle. |
Pedicel | Stalk to a single flower on the inflorescence. |
Panicle | |
Spike |
Image:
Spike (binary/octet-stream)
|
Raceme |
Image:
Raceme (binary/octet-stream)
|
Corymb |
Image:
Corymb (binary/octet-stream)
|
Umbel (simple) |
Image:
Umbel (binary/octet-stream)
|
Umbel (compound) | |
Head |
Image:
Head (binary/octet-stream)
|
Catkin |
Image:
Catkin (binary/octet-stream)
|
Why are seeds considered fattening foods to humans? | They're full of lipids that support growth of an embryo. |
What is the purpose of a fruit? | It's a mechanism for seed dispersal |
Name the layers of a fruit | Exocarp (skin) Mesocarp (fleshy midsection) Endocarp (encloses the seed) Pericarp (all the layers together) |
Fruit from a single carpel, or multiple fused carpels: | Simple |
Fruit from a single flower with multiple, separate carpels: | Aggregate |
More than one flowers that make a fused fruit: | Multiple |
Floral parts other than the ovary contribute to fruit production in: | Accessory fruits |
Nitrogen fixation | Makes atmospheric N2 bioavailable |
Why is Nitrogen important to life? | It's a main component to biological molecules like nucleic acids, or proteins. |
What plant process "Fixes" carbon atoms from CO2 to make organic molecules? | Photosynthesis (specifically the Calvin cycle) |
Taxonomic ranks in order | Kingdom, Phylum, Class, Order, Genus, Species |
What group isn't commonly identified by taxonomic nomenclature? | Birds, because we have standardized their common names. |
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