Which of the following is an example of complex system one with many parts and many variables

A food chain

B a simple machine

C a diagram

D the atmosphere

During which phase of the sexual response cycle does the refractory period begin? orgasm

People once believed that all planets and stars orbited around

Evidence from miller and urey's experiments suggest that complex organic molecules could be formed from other, simpler molecules. why is it unlikely that this process is still occuring today?

Thermogenin, or uncoupling protein 1 (UCP1), found in brown adipose tissue plays an important role in thermoregulation.

1. What are the future implications for human health as we continue to try to stay ahead of evolutionary processes?

The nurse is assessing a child's weight and height during a clinic visit prior to starting school. the nurse plots the child's weight on the growth chart and notes that the child's weight is in the 95th percentile for the child's height.

Which nucleic acid moves the code for protein synthesis from the nucleus to the ribosomes? A.) dRNA B.) tRNA C.) rRNA D.) mRNA

An injury becoming red and sore is a sign of which of the following? Humoral immunity, which results from infiltrating B-cells Humoral immunity, which results from antibody release Inflammation, which result from histamine release Inflammation,

When one homologous chromosome undergoes an inversion but the other does not, the individual is described as?

This organ contains a large number of phagocytes and is important for clearance of opsonized bacteria. People who have this organ removed are at higher risk for disseminated infections by encapsulated bacteria.