問題詳情
5. The probable extinction of the ivory-billed woodpecker was mainly driven by______.
(A)genetic drift
(B) climate change
(C) habitat destruction
(D)introduced species
(E)direct exploitation
(A)genetic drift
(B) climate change
(C) habitat destruction
(D)introduced species
(E)direct exploitation
參考答案
答案：C
難度：計算中-1
書單：沒有書單，新增
內容推薦
- Which one of the following is the best example of a +/- interaction?(A)Competition.(B) Predation.
- Which one is the best answer that how do corals react when sea water temperatures are too high?(A
- 1 在討論人格自我形成的理論中，下列何人的理論多來自於臨床心理學的經驗？(A)顧里 (B)米德 (C)佛洛伊德 (D)艾瑞克森
- 30在電晶體放大器的分類中,當輸入信號為正弦波時,下列何種放大器之效率最低? (A)A類(Class A) 放大器 (B)B類(Class B)放大器(C) AB類(Class AB)放大器 (D)
- 29在電晶體放大器的分類中,當輸入信號為正弦波時,下列何種放大器在一個週期中導通比例最高?(A)A類(Class A) 放大器 (B)B類(Class B) 放大器(C) AB類(Class AB)放
- 有關 SCR (silicon controlled rectifier)的敘述,下列何者正確?(A)SCR在順向偏壓時自然導通 (B) SCR在順向偏壓時觸發後才導通(C) SCR在逆向偏壓時
- 27近年廣泛用於變頻器之功率晶體GBT,其元件無下列哪個端點?(A)基極(base) (B)集極(collector) (C)射極(emitter) (D)閘極 (gate)
- 下列何種二極體常在電子電路中作為參考電壓源?(A)發光二極體 (B)蕭基(Schottky)二極體(C)稽納(Zener)二極體 (D)透納(tunnel)二極體
- 下圖中輸出信號與輸入信號之比 為何? (A)1(B)2(C)3(D)0.5
- 一般而言,下列何種直流馬達之啟動轉矩較大?(A)永磁式直流馬達 (B)分激式直流馬達(C)他激式直流馬達(D)串激式直流馬達
內容推薦
- Albinism in most animals is an epistatic trait characterized by a lack of melanin pigment in the
- The Y substance is needed for the proper phenotypic expression of the A, B, and AB blood types in
- Two molecules with identical molecular formulas but that have different structures are called ___
- The_____ functional group can possibly provide covalent bond and then promote the tertiary struc
- If a specimen contains 30% adenine in its DNA then how much cytosine will there be_____.(A)15%(B
- The Endosymbiosis Theory best describes the origins of _____ in eukaryotes.(A)endoplasmic reticu
- Sucrose and H+can move into the cell by a common membrane protein reflects transport through a _
- Which one of the following processes will both occur in the presence or absence of oxygen?(A)Gly
- Which one of the following is the most correct of the TCA cycle?(A)In the reaction of electron t
- About the mitochondria, which one of the following is more incorrect?(A)The most cells contain a
- About the light reaction of photosynthesis, which one of the following is the best answer?(A)Pho
- About the ATP production in the light reaction of photosynthesis, which one of the following is
- In C4 plants, the gaseous CO2 can be fixed by ______.(A)oxaloacetate(B) phosphoenolpyruvate(C) m
- About the nutrient translocation (source-sink) during photosynthesis, which one of the following
- About the phytochrome, which one of the following is the best answer?(A)Pr and Pfr are the same
- Polysaccharide _____ is an important ECM component for the exoskeleton of many insects and shell
- The heart is a(n) ________ composed mainly of ________ tissue?(A)tissue, endothelial(B) tissue,
- Which one of the following proteins is involved in synthesizing messenger RNA in eukaryotes?(A)D
- Which one of the following is the best characteristic of microRNAs (miRNAs)?(A)MicroRNAs are sho
- Bacteria are grown in isotopic 15N (heavy) medium and then transferred to 14N (light) medium and
- Where would one expect to find the most abundant/active telomerase?(A)Male germ cells that give
- ______ is a type of physical mutagens could induce thymine dimer mutations.(A)Gamma rays(B) X-ra
- Which one of the following is the cancer of epithelial cells?(A)Sarcoma.(B) Myeloma.(C) Leukemia
- When cancer cells can migrate to other parts of the body, they are always said to be____.(A)beni
- Humans have __________ different types of autosomes.(A)11(B) 22(C) 33(D)44(E)46