Answer the following statements true (T) or false (F)
1. SLOSS stands for single long or several short.
2. Beavers are an example of a dominant species.
3. Captive breeding could potentially save all rare species.
4. Field experiments by David Tilman showed that increased plant diversity reduced the severity of attack by foliar fungal diseases.
5. According to the IUCN's data, a smaller percentage of bird than coral reef-dwelling fish species are endangered.
1. FALSE
2. FALSE
3. FALSE
4. TRUE
5. TRUE
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Which of the following features of a pathogen is not considered to be a virulence factor when establishing infection within host?
A. Attachment fimbriae B. Slime layer C. Pigment production D. Protein spikes
When Peter Agre and colleagues compared frog oocytes expressing aquaporin with control oocytes lacking aquaporin placed in pure water, they found that
A) the control oocytes lacking aquaporin swelled and burst as water was transported into the cells. B) the oocytes expressing aquaporin swelled and burst as water was transported into the cells. C) the oocytes expressing aquaporin collapsed as water was transported out of the cells. D) the oocytes expressing aquaporin first swelled and then collapsed as water was transported into and then back out of the cells. E) the oocytes expressing aquaporin first collapsed and then swelled as water was transported out and then back into the cells.
The most abundance compound in most living things is
a) carbon dioxide b) water c) sodium chloride d) sugar
The immature angiosperm pollen grain consists of a tube cell and a generative cell that will divide to produce ________ sperm cells
A) one B) two C) three D) four