Number of centromeres visible at prophase are?

In which of the following relationships is one organism always benefited while the other organism is always harmed

Has anyone taken the genetics unit test in connexus? not looking for answers, just a little bit what to expect and some with studying.

The lake of the ozarks is a human-made lake, so it collects runoff from coal strip-mining, fertilizers, resort wastewaters, and septic drainages. the average lake temperature is between 10∘c and 21∘c. consider the physical requirements for growth and multiplication that would allow fecal coliforms to “blossom” in the lake of the ozarks. which of the following would accurately describe these organisms? check all that apply. psychrophiles facultative halophiles extremophiles mesophiles hyperthermophiles