Answer:
Explanation:Seawalls are structures built of concrete, wood, steel or boulders that run parallel to the beach at the land/water interface. They may also be called bulkheads or revetments. They are designed to protect structures by stopping the natural movement of sand by the waves.
No. The first multicellular organisms appeared during the P<span>aleozoic era.</span>
Answer:
Option (E)
Explanation:
Phosphorous is an important nutrient that is found on earth. It acts as nutrients for the growth, development, and expansion of organisms like plants and animals. It is mostly found to be accumulated in the sedimentary rocks, which are formed from the compaction and solidification of sediments. This rocks when disintegrates due to the weathering and erosion, they mix up with the soil as well as water and transports from one place to another. Plants obtain these phosphatic ions directly from the soil.
Thus, the major reservoir for the phosphorous in the phosphorous cycle is the sedimentary rocks. From this only, the cycle of phosphorous initiates.
Hence, the correct answer is option (E).
Pesticide gets washed back into the water when the plants are watered and pesticide is a major pollution
The statement that best compares gymnosperms and angiosperms is : A. Both reproduce sexually, but gymnosperms contain only xylem and angiosperms contain xylem and phloem.
Gymnosperms produce exposed seeds, not enclosed in fruit whilst Angiosperms have Fruits, flowers, and endosperms as defining characteristics.
