A hypothetical community on a barren mid-Atlantic island consists of two fish-eating seabirds (the booby and the noddy), the fungi and microorganisms that live on the birds' dung, a tick that feeds on these two birds, a cactus, a moth that feeds on
cast-off feathers, a beetle that lives on dung organisms, and spiders that eat the other arthropods. There are no other plants and no lichens. Which pair of organism and trophic structure is incorrect?
A) fungi—detritivores
B) booby—primary consumer
C) moth—detritivore
D) cactus—producer
Answer: B
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One hypothesis about the decline in cell numbers during death phase is that the cells aren't all dying but instead remain alive but unable to grow when cultured, at least temporarily. These are known as
A. death phase cells. B. ghost cells. C. programmed death cells. D. viable but nonculturable cells.
When tumor cell DNA is examined from people at different stages of the same cancer type, mutations that are common to all of them
A) act early in the disease. B) act late in the disease. C) acted on an initial cell and then reverted to wild type. D) entered the cells on the same type of virus.
The breakdown of body fat
What will be an ideal response?
Fermentation is primarily involved in the recycling of
a. ADP. b. oxygen. c. pyruvate. d. NAD+.