A) An excessive amount of fertilizer which has run off fields into aquatic areas causes increased plant growth, often on plants such as algae which is common on the top of fairly still water. This decreases the light which reaches the water so can change the temperature and alter the plant life at the bottom of the pond / lake / water area so negatively alters the ecosystem.
<span>I.e. you compare observations with low value of independent variable to those with high one.</span>
Answer:
comparing and contrasting on rivers and lakes
Explanation:
rivers are a running body of water that outputs into lakes bays and oceans, lakes are a steady not running body of water which houses lots of animals and plants.
The reticular layer is composed of dense irregular connective tissue whose strength and toughness results from abundant collagen fibers.
The reticular dermis of the skin has many collagen fibers to support it because it provides strength and acts as a cushion. It also has elastin fiber that makes it elasticity.
Answer:
Intensity of heat, lack of water, and a blazing/searing sun.
<h2>
Why are there so few humans and animals in the desert?</h2>
A desert is defined as a place with a hot and dry temperature, little or no rainfall (less than 25 cm), a barren landscape, a lack of water, and dry soil. There is very little vegetation. Plants appear only after rain, are seasonal, and have a short lifespan. Dust storms and shifting dunes may be dangerous. In other words, the circumstances are unfit for human occupancy. That is why relatively few people live in or near deserts. Animal life is likewise sparse, yet abundant in some areas. Some locations, such as Egypt's Nile Valley, may be heavily inhabited if enough water is available. In reality, air-cooling, air-conditioning, and irrigation facilities, as well as the discovery of petroleum wherever and whenever it was accessible, have made desert life more pleasant, dynamic, and have drawn people from outside, such as the Gulf area.
<h2>Why don't desert animals just move somewhere greener?</h2>
Deserts are a result of the Earth's atmosphere. Do you notice how deserts appear to be in similar zones? This is due to the tight link between deserts and rainforests. So this is what generates a desert, not what attracts or maintains animals here. Plants bring them and keep them alive. As plants adapt, so do animals, and the desert creates a complete ecosystem. They do not depart since they have adapted to their surroundings.