In the absence of physical examinations, what might a zoo veterinarian observe to determine an animal's health? a) Water intake
b) Posture
c) Behavior
d) All of the above

In the practice of science, this type of reasoning is used to develop explanations.

What are examples of the plant life and animal life that can be found in each type of terrarium

During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.