Which is the correct sequence of increasing organization?
A) Atom, molecule, tissue, cell
B) Organelle, tissue, cell, organ
C) Organ, tissue, cell, molecule
D) Molecule, cell, organelle, organ
E) Cell, tissue, organ, organ system
E
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Recall that over the last 400,000 years, atmospheric CO2 levels have fluctuated, with the lowest levels occurring during glacial periods and the highest levels seen during interglacial periods
Why might atmospheric CO2 levels be lower during glacial periods? A. During glacial periods there are more volcanic eruptions. B. During glacial periods there are fewer photosynthesizing plants. C. During glacial periods more carbon is stored in ocean reservoirs. D. During glacial periods chemical weathering stops.
Which of the following organisms would likely be a K-strategist?
A. humans B. pine trees C. salmon D. frogs E. grasshoppers
Answer the following statements true (T) or false (F)
1. 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. 2. Acanthostega is an important fossil for the understanding of phylogeny because it is an intermediate form between lobe-finned fishes and amphibians. 3. The formation of feathers, hair, and reptilian scales is based on completely different developmental patterns and genetic influences. 4. Some dinosaurs had feathers. 5. In previous times, birds and pterosaurs were contemporaries.
Phosphorylation of the Golgi matrix proteins by Cdk1 during mitosis
a. mediates breakdown of the Golgi apparatus into vesicles. b. activates proteins to degrade the Golgi proteins. c. inhibits association of the Golgi with microtubules. d. causes microtubules to pull the Golgi into two parts.