The progressive shortening of telomeres in DNA correlates with cell senescence.
Answer the following statement true (T) or false (F)
True
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Which of the following is NOT TRUE concerning
photosystem I? a. It can run independently as a cyclic pathway. b. It runs as a cyclic pathway when too much NADPH is produced. c. Electrons from p700 return to p680 when it runs as a cyclic pathway. d. When it runs as a cyclic pathway, neither NADP+ nor O2 is formed. e. Its energized electrons are used to build a high H+ concentration.
The difference in temperature preference between two populations of Daphnia water fleas is due to a mutation. The original population prefers temperatures near 20°C, while the mutant population prefers temperatures between 25°C and 30°C. Predict how natural selection might affect the geographical distribution of these two populations.
What will be an ideal response?
When a finger or other appendage is severed in an accident, it is possible to surgically rejoin most tissues (bone, skin, etc.), which will then grow and heal. However, a cut through an appendage nerve is currently very difficult to reconnect. What structures are severed when the nerves in an appendage are severed?
A. axons B. interneurons C. cell bodies D. synapses E. dendrites
Drifting freely in the upper, well-illuminated waters of the ocean, a diverse biological community exists, primarily consisting of microscopic organisms called
A. detritus. B. archaeans. C. bacteria. D. benthos. E. phytoplankton.