Diazotrophs Maximize Nitrogenase Activity by

question 18

Multiple Choice

Diazotrophs maximize nitrogenase activity by

• A) closely coupling N₂ fixation with high rates of photosynthesis.
• B) fixing N₂ at times when oxygen is absent or in low concentrations.
• C) producing specialized structures to protect nitrogenase from oxygen.
• D) producing specialized structures or fixing N₂ at times when oxygen is absent to protect nitrogenase from oxygen.

---

Definitions:

Estrogen

A group of steroid hormones that play a critical role in female reproductive and sexual health, but also affect many other tissues and organs.

Sexual Orientation

An enduring pattern of emotional, romantic, or sexual attractions to men, women, both, neither, or another gender.

Surveys

A method of gathering data from a large number of respondents, typically by asking them questions.

Homosexual Behaviors

refer to sexual activities and attractions between individuals of the same sex.