They grow to about three feet tall with long thin light green leaves that have a sharp apex (point) at the end. Numerous drooping bell shaped flowers are found on a Yucca plant with each one holding a hardened capsule full of seeds; these are dispersed by the wind. Wind dispersal is not the only way for the Yucca to reproduce; they also have a unique rhizomatous
Wood that is freshly cut (also referred to as green wood) and is considered young compared to older “seasoned” wood. Green wood contains more moisture and is considered “unseasoned”. When examing green wood you may find that is light along the cut edges. Unseasoned wood may be harder to ignite and most likely produce more smoke when burned. However seasoned wood should burn quickly because of its relative dryness.
In young dicot stems and stems (usually the upright, vertical portion of a plant transports substances to and the leaves) that do not increase in thickness, xylem and phloem are arranged in vascular bundles in the cortex. In older stems and all woody stems, the vascular tissues form a cylinder between the cortex and the pith. The vascular bundles in a monocot are scattered throughout the stem. In vascular plants, the dominant sporophyte has two kind of well-defined conducting tissues. Xylem is specialized to conduct water and dissolved minerals, and phloem is specialized to conduct organic nutrients and hormones.
Plant Structure. LEAVES: · Leaves are the plant organs where most photosynthesis occurs. Their broad flattened structure optimizes the surface area exposed to light. Plant morphologists have developed a hypothesis, supported by scientific evidence, that leaves are flattened stems between which tissue has developed. · The shape and structure of leaves vary considerably from species to species of plant, depending largely on their adaptation to climate and available light, but also to other factors such as grazing animals, available nutrients, and ecological competition from other plants.
What are Madagascar’s biomes? Discuss the major features of at least one of these biomes. Use the textbook for biome examples. Madagascar consists mainly of tropical rain forest. The island also includes some tropical dry forest and savanna areas.
Savannas have warm temperature year round. There are actually two very different seasons in a savanna; a very long dry season (winter), and a very wet season (summer). The tropical savanna is generally found in regions dominated by the wet-dry tropical climate such as Australia, and Africa. An extensive cover of tall grasses, sometimes reaching a height of 3 meters, is found in the tropical savanna. Most savanna grass is coarse and grows in tufts with intervening patches of bare ground.
The light was different between the two sites because the canopy in the forest significantly reduced the amount of light that was able to shine through. This difference in light could account for the trend observed in air temp, shallow soil temp, and deep soil temp. Since there was more sunlight present in the grassy area, with minimal coverage, the temperature was higher in all three measurements compared to the forest
2. The ____________________ are vast expanses of plains found in the interior of Brazil. 3. In South America, the ____________________ flows about 4,000 miles from west to east, emptying into the Atlantic Ocean. 4.
Since it is a plant it will help reduce the “green house” gases and pollution in the air, not to mention making a cleaner burning fuel source to replace gasoline and reduce the amount of pollution even more. The plant also does not take much soil space and can be grown in between other crops such as corn. Hemp as long roots so that it improves soil structure and replenishes soil with nutrients and nitrogen and helps control erosion of topsoil. Also, once harvested, any residue can act as eco-friendly manure. It is also a weed suppresser to prevent other weeds from growing because it grows so fast and densely, it blocks out sunlight to other weeds that are trying to grow.
By pollarding trees at this height it means that the tree is able to survive and therefore can carry on to row and supply wood. This means that the growing of the species can continue until its reaches its climax of oak and elm trees, rather than the whole tree being cut down completely and being forced into a plagioclimax where small trees like rowan and hawthorn are the dominant species. However some temperate deciduous woodlands have been cut down for recreational purposes, an example of this is Epping Forest where a large amount of the forest has been cut down to home 60 football pitches. This means that the forest has not been able to climax naturally and so has meant that there is in fact a plagioclimax, with the dominating species being grass. This is the first stage of the temperate deciduous woodland biome and would mean that the area would have to be left untouched for many years for the succession to happen.