Pleiotropy occurs when one gene influences multiple, seemingly unrelated phenotypic traits. A single gene is responsible for pigmentation and hearing.
All the spheres interact with other spheres. For example, rain (hydrosphere) falls from clouds in the atmosphere to the lithosphere and forms streams and rivers that provide drinking water for wildlife and humans as well as water for plant growth (biosphere).
The sandstone arches found in arches national park, utah, are an example of Sedimentary rock. Sandstone is composed of cemented sand grains and is the cliff-forming rock commonly seen in southern Utah. Two famous formations are the Entrada Sandstone seen in Arches National Park, and the Navajo Sandstone (Checkerboard Mesa) in Zion National Park.
Answer:
Lymph nodes become swollen in response to illness, infection, or stress.
Explanation:
Swollen lymph nodes are one sign that your lymphatic system is working to rid your body of the responsible agents.
The microorganisms found in soil are important because they affect the structure and fertility of soil. Certain bacteria responsible for nitrogen fixation converts nitrogen in the atmosphere, so that it can be used by plants. Because of microbes, nutrients and minerals are made available to plants. Soil with more diverse microbe will result in fewer plant diseases and better crop yield.
