A teacher asked each student in the class to make a model demonstrating the importance of solar energy for life on Earth. Which
model should a student make? A. A model of the electromagnetic spectrum
B. A model of a local food web
C. A model of the water cycle
D. A model of a mitochondrial matrix
The student should make a model of a local food web describing the importance of solar energy for the life on earth. This is because of the fact that solar energy is the basic source of energy for a food web. A food chain is a linear sequence of transfer of food and energy when one organism is consumed by another organism. A food web is a interconnection of two or more food chains. The food chain at the initial level includes producers which includes all photosynthesizing organisms like plants which captures the light energy from sun to produce their food. The plants are consumed by many organisms on earth. Therefore, food web model will demonstrate the role and importance of sun for existence of life on earth.
Fertile soils teem with life. Porous loamy soils are the richest of all, laced with organic matter which retains water and provides the nutrients needed by crops. Sand and clay soils tend to have less organic matter and have drainage problems: sand is very porous and clay is impermeable.
The most plausible hypothesis to explain why species richness is higher in tropical than in temperate regions is that B) tropical regions have more available water and higher levels of solar radiation.
Tetanus is not possible in cardiac muscle tissue because cardiac cells have longer action potentials and a very long refractory period compared to other cells. This helps prevent the heart from cramping and seizing up.
