a) The flow of blood into the pulmonary artery will be reduced b) The blood will tend to flow back into the left atrium c) The flow of blood... View Article
a) Rhizobium b) Azotobacter c) Rhodospirillum d) Beijernickia Answer: c) Rhodospirillum Explanation: Others are aerobic nitrogen fixers.... View Article
a) Tracheids b) Fibers c) Transfusion tissue d) Vessels Answer: a) Tracheids Explanation: In gymnosperms and pteridophytes, vessels are... View Article