Cyanobacteria
1.produce oxygen.
2.have a blue-green color.
3.are photosynthetic.
4.played a very important role in the evolution of life on earth.
5.All of the options are correct.
5
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The cell produced by the fusion of an egg and a sperm is the
A. gamete. B. oocyte. C. zygote. D. germ line cell. E. somatic cell.
The lipid components of cellular membranes include __________________
A. phospholipids B. phospholipids and fatty acids C. fatty acids and cholesterol D. phospholipids and cholesterol
Microbes are not responsible for:
A. Synthesis of acetone and alcohol B. Synthesis of vitamins C. Oxygen generation by photosynthesis D. Breaking down wastes E. Production of antibodies
Entamoeba histolytica is acquired by
A. sexual contact. B. contaminated water. C. contaminated food. D. ingestion of cysts of the pathogen. E. All of the choices are correct.