Substances that influence reactions in the lymph and immune systems are:  

The patient has stools passing through an abnormal opening in a tissue wall. The health care provider identifies a(n) __________________

Karl Simms in 1991 used natural selection within cyberspace to evolve an artificial creature that could:

Edouard van Beneden was the first to describe the process of:

During ______________ the dyads of homologous chromosomes wrap around each other forming a tetrad.

Sections of non-sister chromatids within a tetrad break off and exchange places in a process known as:

Crossing over results in a chromosome with a mix of genetic material from both parents.

How many cell divisions take place during one round of meiosis?

Antibiotic resistance can be passed horizontally among bacteria via:

What process did Howard Florey and Ernst Chain use to get a strain of Penicillium chrysogeum that yield enough penicillin to manufacture commercially?