Which of the following statements concerning evolution is not true?
A. Nonflowering plants preceded the flowering plants.
B. Fishes evolved before terrestrial plants.
C. Reptiles preceded the amphibians.
D. Unicellular eukaryotes evolved before multicellular eukaryotes.
E. Fishes evolved before terrestrial animals.
Answer: C
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During photosynthesis, the energy given up by electrons as they move through the electron transport chain is used to
A. produce glucose. B. fix CO2. C. generate an electrochemical H+ gradient across a membrane. D. oxidize water. E. boost energy levels of pigment electrons.
It is estimated that ____ tons of plastic enter the ocean annually
a. 500 b. 500 thousand c. 1 million d. 10 million e. 100 million
In order for a muscle to contract, calcium ions released from the sarcoplasmic reticulum must bind to
A. myosin. B. ATP. C. tropomyosin. D. troponin. E. actin.
Genes are found in the same order for large stretches of the X chromosome in the rat and mouse genomes, indicating
A. conservation of neoteny. B. conservation of synteny. C. occurrence of aneuploidy. D. formation of pseudogenes.