Answer the following statements true (T) or false (F)
1.The earliest cells probably originated about 3.5 billion years ago.
2.The endosymbiont theory states that eukaryotic cells work together to form a multicellular organism.
3.The endoplasmic reticulum, Golgi apparatus, and other membranous organelles of cells might have formed by numerous infoldings of the cell's outer membrane.
4.The three periods of the Mesozoic era are the Triassic, Jurassic, and Cretaceous.
5.The two major extinctions of living species occurred during the Mesozoic era.
1.TRUE
2.FALSE
3.TRUE
4.TRUE
5.FALSE
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Which of the following is not a target for immune complex deposition?
A. Joints B. Kidneys C. Blood vessels and skin D. Heart and lungs E. Brain
____ are NOT composed of microtubules.
A. Cilia B. Flagella C. Chromosomes D. Centrioles
The mitochondrial genomes usually consist of
a. a single linear DNA molecule. b. several linear DNA molecules. c. circular DNA molecules. d. None of the above—mitochondria do not have a genome.
A goal of genomics is to ________
A) understand the mechanisms that control gene expression B) provide a way to produce large quantities of a particular gene product C) regulate how genes are expressed without changing the protein they encode D) manipulate genetic material for human purposes