The original cell was thought to have arisen from the enclosure of self-replicating _______ by a phospholipid membrane.
a. DNA
b. carbohydrate
c. protein
d. RNA
Ans: d. RNA
Biology & Microbiology
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The multiple effects of a single gene on the phenotype of an organism is called _______
A. epistasis B. penetrance C. expressivity D. overdominance E. pleiotropy
Biology & Microbiology
The parasite that is responsible for causing malaria is called
A. Paramecium. B. Chlamydomonas. C. Plasmodium. D. Entamoeba. E. Giardia.
Biology & Microbiology
Human vertebrae are held together by ____ joints
a. synovial b. cartilaginous c. fibrous d. both fibrous and cartilaginous e. both synovial and fibrous
Biology & Microbiology
Plastids evolution began when an ancestral cell engulfed what?
a. a spirochete b. a cyanobacteria c. a mitochondria d. green algae
Biology & Microbiology