1. 當植物受精卵(zygote)在第一次有絲分裂(mitotic division)後,兩個細胞中較大的一個將會變成?(A)embryo(B)suspensor(C) endosperm(D) mi
1. An unicellular eukaryote with a siliceous shell and heterotrophic nutrition should belong to ____
1. 長青花鹼 (vinblastin) 是治療癌症之藥物,可干擾微管 (microtubule) 之組裝,其作用最可能是下列何者受到抑制?(A) DNA 之合成(B) 週期素 (cyclins) 之
1. A fossil that has one fourth the normal proportion of carbon-14 to carbon-12 is approximately ___
2. Several of the different globin genes are expressed in humans, but at different times in developm
3. Most causes of speciation are relatively slow, in that they may take many generations to see chan
4. Leaf thickness represents a trade-off between ______.(A) water retention and carbon dioxide absor
5. What is the only type of chemical signal that does not alter the physiology of the animal produci
6. Which of the following causes populations to shift most quickly from an exponential to a logistic
7. Matter is gained or lost in ecosystems. How does this occur?(A) Heterotrophs convert heat to ener
8. Which of the following provides the best evidence of a biodiversity crisis?(A) the incursion of a
9. An earthquake decimates a ground-squirrel population, killing 98% of the squirrels. The surviving
10. If a cell has completed meiosis I and is just beginning meiosis II, which of the following is an
11. Jams, jellies, preserves, honey, and other foods with high sugar content hardly ever become cont
12. Sympatric species ______.(A) are more likely than allopatric species to display character displa
13. The veins of leaves are ______.I) composed of xylem and phloemII) continuous with vascular bundl
14. To be useful to plants soil nitrogen must usually occur as:(A) N2 and NH3 (B) NH3 and NO3-(C) NO
15. What major benefits do plants and mycorrhizal fungi receive from their symbiotic relationship?(A
16. Which of the following statements about vitamins is FALSE?(A) Thiamine is a coenzyme in removing
18. DNA methylation and histone acetylation are examples of ______.(A) genetic mutation (B) epigenet
19. Which of the following is in the correct order for one cycle of polymerase chain reaction (PCR)?