Because of biogeochemical cycling,
a. human activity has no effect on elements, chemical compounds, and other forms of matter.
b. living organisms are not limited by any one nutrient.
c. nutrients are circulated throughout the biosphere.
d. many nutrients do not reach toxic concentrations in the biosphere.

Identify the composition of oceanic and continental crystal rocks.in a model of earth’s interior,where would these rocks appear?

Many body systems work together for proper functioning of the body and to maintain internal homeostasis. the works to break down food eaten before exercising. the takes in the nutrients obtained from the food. the body sweats as a mechanism to cool off, because the is working to flush out toxins.

Which of the following is an example of competition a. the leaves of a tree prevent a small shrub from getting sunlight. three species of birds feed a different heights in the same tree. b. three species of birds feed at different heights in the same tree c. zebra and giraffe’s feed on different grassland plants d. cats living in two different homes eat the same brand of cat food.