lysossomes
What will be an ideal response?
contain enzymes; digest worn out cell parts
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Which of the following series is arranged in the correct sequence for nitrogen fixation and its subsequent use?
A. atmospheric nitrogen; use of bacterial nitrogenase; production of ammonia; conversion by plants or algae; synthesis of proteins B. atmospheric nitrogen; use of bacterial nitrogenase; conversion by plants or algae; production of ammonia; synthesis of proteins C. atmospheric nitrogen; production of ammonia; use of bacterial nitrogenase; conversion by plants or algae; synthesis of proteins D. atmospheric nitrogen; production of ammonia; use of bacterial nitrogenase; synthesis of proteins; conversion by plants or algae E. ammonia; conversion by plants and algae; production of atmospheric nitrogen; use of bacterial nitrogenase; synthesis of proteins
Small circular DNA molecules capable of replicating and containing genes that are useful but not necessary to the bacterium are called ________.
Fill in the blank(s) with the appropriate word(s).
A fungi is best described as a ________
a. seed producing autotroph with cell walls of chitin b. seed producing heterotroph with cell walls of cellulose c. spore producing heterotroph with cell walls of chitin d. spore producing autotroph with cell walls of chitin e. spore producing heterotroph with cell walls of cellulose
The first phylum with three germ layers is
a. Cnidaria. b. Platyhelminthes. c. Annelida. d. Arthropoda. e. Nematoda.