An organism that carries out cellular respiration in its mitochondria:
A. may be a cell from a terrestrial plant.
B. may be a prokaryotic cell from the domain
Arcahea.
C. is a bacterium.
D. may be any kind of cell.
A
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You are a doctor are examining a patient whose thymus never developed because of DiGeorge syndrome
You know that this medical condition is usually due to the deletion of a section of chromosome #22 and that a single copy of shortened chromosome causes the syndrome. The patient's parents are both phenotypically normal with normal thymuses. This suggests that _____________. A. both parents are heterozygous B. both parents are homozygous recessive C. the individual inherited the trait from his grandparents. D. the deletion occurred during gamete formation and thus was not part of the parents' genome.
The nodes on a cladogram represent
a. periods of extinction. b. derived characters. c. clades. d. common ancestors. e. exaptations
Watson and Crick are usually given credit for discovering that DNA has a ____________ shape.
Fill in the blank(s) with the appropriate word(s).
The fins of lobe-finned fish are supported by extensions of the skeleton and are moved by muscles within the fin whereas the fins of ray-finned fish are supported by flexible, nonskeletal elements and are moved by muscles from within the fish's body.
Answer the following statement true (T) or false (F)