An example is forest floors. Naturally produces compost
Answer:
C) Photosynthetic bacteria, invertebrates, vertebrates, reptiles, amphibians, mammal.
Explanation:
- From looking at the above records of evolutionary life on earth the traces of living fossils and organisms that are evolved to the biogenic carbon signatures and the earliest known stromatolite fossils on earth the evidence of 3.7 billion year rocks taken from western Greenland.
- All show the occurrence of first life forms as photosynthetic bacteria and evolution of soil and oxygen in it took place then the invertebrates plat and animals appeared on land and oceans like the nematodes and arthropods, after which started to evolve like the vertebrates like the tetrapod the first fish with four limbs in 360 million years.
- After which reptiles and dinosaurs are the largest land reptiles evolved and then came the amphibian likes and then lead to the evolution of man and other mammals.
Explanation:
Limitation of Water Transport: -Water transport has the following limitations.
1. The depth and navigability of rivers and canals vary and thus, affect operations of different transport vessels.
2. It is a slow moving mode of transport and therefore not suitable for transport of perishable goods.
3. It is adversely affected by weather conditions.
4. Sea transport requires large investment on ship and their maintenance.
5. It has high maintenance costs for ship and takers as it requires constant repairs and painting of ships.
Answer: The order of the stages of primary succession as seen at glacier bay are Pioneer, Dryas, Alder, and Spruce stages.
Explanation:
Primary succession is the process that plant species use to colonize a sterile habitat. The first living organisms, the pioneer species are hardy species, for example moss that are able to survive in any habitat. These change the unfavorable environment (lava, rock) to soil.
In Glacier bay, Alaska, the dryas came next, providing the soil with Nitrogen, then Alders which maintains the nitrogen content in the soil. This is followed by spruce trees which grow in the the shade of the alder
.
Alaska: Augustine volcano
California: Lassen Peak, Mount Shasta
Hawaii: Mauna Loa, Kilauea volcano
Oregon: Mount Hood, Mount Jefferson
Washington: Mount Rainier, Mount St Helen's, Mount Baker.