In the ABC model of flower development in
Arabidopsis thaliana, carpels form when gene(s)
__________ is(are) switched on.
a. A
b. A and B
c. B and C
d. C
e. A and B and C
Answer: d
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Which cellular structure makes sugars and proteins in plants?
a. Vacuole b. Centriole c. Nucleus d. Golgi body e. Chloroplast
Conservation biologists try to protect or create habitats for endangered species. How would this directly affect the equation G = rN(K – N)/K for an endangered animal?
A. It would lower N. B. It would raise r. C. It would raise K. D. It would raise N. E. It would lower K.
When under attack, ciliates can eject sticky threads
called a. vacuoles. b. trichocysts. c. cysts. d. pseudopods. e. pellicles.
In a resting neuron, the inside of the cell is negatively charged mainly because of
a. negatively charged chloride ions inside the cell. b. potassium ions being pumped out of the cell. c. negatively charged proteins inside the cell.