Cyanobacteria that can perform nitrogen fixation: a. do so on membranes called thylakoids b. cannot also perform aerobic photosynthesis c. are part of the community of organisms at deep-sea vents d. provide both fixed nitrogen and fixed carbon dioxide to other organisms e. use this metabolic pathway to provide themselves with glucose

Which of the following statements most accurately describes convergent evolution? the process in which two similar species evolve separately from each other and share similar characteristics the process in which a single species evolves into two or more new species the process in which two entirely different species evolve in response to each other the process in which two different species evolve separately from each other but still share similar characteristics

Which of these statements is false? a. others may notice a problem with a relationship before the people involved. b. the first sign of a problem with a relationship is a feeling of anger. c. damaged relationships can be repaired. d. even good relationships can be damaged.

Match the reproductive structures based on their function and the system to which they belong. egg ovary sperm vas deferens vagina fallopian tube testis urethra