In the context of ovary culture for haploid production, what is the ideal developmental stage for collecting flower buds? 

#Question id: 10363

#Environmental Science

Free living nitrogen fixing takes place as shown in the following;

             TYPE                                                                                       N-FIXING GENERA

A) Cyanobacteria (blue-green algae)                                        i) Bacillus

B) Aerobic                                                                                     ii) Clostridium

C) Facultative                                                                              iii) Anabaena

D) Anaerobic nonphotosynthetic                                            iv) Rhodospirillum

E) Anaerobic photosynthetic                                                     v) Azospirillum

 Which of the following combination of free living nitrogen fixing bacteria is correct?

#Question id: 10364

#Environmental Science

Which of the following is the most common type of symbiosis occurs between members of the plant family and soil bacteria?

#Question id: 10365

#Environmental Science

Why the nitrogenase enzymes catalyzes the nitrogen fixation reaction only in microanaerobic or anaerobic conditions?

#Question id: 10367

#Environmental Science

Cyanobcteria also fixes nitrogen under anaerobic conditions without  heterocyst where?

#Question id: 10368

#Environmental Science

Free-living bacteria that are capable of fixing nitrogen are aerobic, facultative, or anaerobic. Some of the Aerobic nitrogen-fixing bacteria such as

#Question id: 10369

#Environmental Science

Which type of the nitrogen-fixing bacteria are thought to maintain a low oxygen concentration (microaerobic conditions) through their high levels of respiration