Coal consists primarily of compressed remains of the_______ that dominated Carboniferous swamp forests. a. seedless vascular plants c. flowering plants b. conifers d. hornworts
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Coal consists primarily of compressed remains of the_______ that dominated Carboniferous swamp forests.
a. seedless vascular plants c. flowering plants
b. conifers d. hornworts
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- Mosses growing on bare rock will eventually help to create soil.These mosses are involved in _____ succession.a. primary b. secondary c. tertiaryA plant in the understory of a forest displays a segmented stem and slender leaves arranged in a whorl. It is probably a ________. a. club moss b. whisk fern c. fern d. horsetailIn the northern forests of Siberia, a tall tree is most likely a: a. conifer b. cycad c. Ginkgo biloba d. gnetophyte
- A mountainous volcano has erupted and destroyed all evidence of the previous ecosystem. The lava has cooled, leaving no trace of previous inhabitants. Years go by with no apparent change in the affected region. What evidence would first signal the succession of the community? A. Appearance of pioneer species B. Appearance of flowering plants in springtime C. Splitting of lava from regrowth of trees D. Saturation of lava with moisture for plant growthHowdoes canopy shading influence succession of pines and deciduous trees in the Piedmontof North Carolina?a.Canopy shading by deciduous trees is required for growth of pines.b.Canopy shading by deciduous trees prevents establishment of pines untillate in succession.c.Canopy shading by deciduous trees prevents persistence of pines in latesuccessional stages.d.Canopy shading by pines prevents establishment of deciduous trees.e.Canopy shading by pines kills deciduous trees that were establishedearly in succession.A giant, magnificent sequoia tree towers above everything else in the environment. The growth of this tree most likely is not____ limited. a. nutrient b. light c. temperature d.nutrients
- Why is the destruction of tropical forests so devastating?A. Tropical forests are considered a non-renewable resource due to the amountof time it takes for reforestation to occur.B. Tropical forests cover much less of the surface of the earth than other types offorests and are eliminated faster as a result.C. Tropical forests contain the habitats of the vast majority of life on earth. D. Tropical forests are the primary source of income for many corporations andbusinesses. Why has food production increased despite a net degradation in soil?A. The productivity of the land being used has increased, so more food is beingproduced.B. The widespread use of fertilizers enables more food to be grown than inprevious years.C. Many countries have programs that reward farmers who practice soilconservation techniques.D. Farmers are developing more cropland from wilderness areas now comparedto the past.Understory plants in a temperate forest have adaptations to capture limited ________. a. water b. nutrients c. heat d. sunlightA coniferous tree A. bears leaves B. sheds leaves annually C. has cones and needles D. changes with the season
- Pond successionA: Emergent plant life grows at the edges where sunlight permeates.B: Sediment begins to accumulate as plants decay.C: Emergent plants grow inwards, sediment accretes. D: Emergent and terrestrial plants fill the pond throughout.E: Sediment fully fills the pond, terrestrial plants take over .F: Trees grow and the pond becomes the forest. Scene A Scene B Scene C Scene D Scene E Scene FWhy do you suppose plants and forests appeared in large numbers before large animals did? Several of the choices may be correct. Select the options you expect to be the strongest contributing factors.A. Animals need food, and there was none on land before plants. B. Plants were driven to land by scarce resources in the oceans, such as light and minerals. C. It was too cold for animals at first. D. Animals are more susceptible to radiation and needed more ozone in order to survive out of the water. E. The order was pure chance and could have gone either way. F. There was not enough oxygen for lungs to be effective before plants colonized land. G. The increased oxygen levels produced by land plants accelerated animal evolution. H. Plants had to change less to survive on land.Which of the following is typically true concerning the difference between Deciduous Forests and Coniferous Forests? A.Coniferous Forests tend to dominate where water is limited by soil, freezing temperatures, or lower rainfall B. Coniferous Forests tend to dominate where humans have disturbed the land C. Deciduous Forests only exist in tropical areas D. Deciduous Forests tend to dominate where water is limited by soil, freezing temperatures, or lower rainfall