問題詳情
41.A graduate student growing plant cells in a laboratory dish wanted to cause them to _, so the graduate studentjtreated them with cytokinins.I
(A) enlarge
(B) become dormant
(C) grow roots
(D) produce auxins
(E) divide量
(A) enlarge
(B) become dormant
(C) grow roots
(D) produce auxins
(E) divide量
參考答案
無參考答案
內容推薦
- Which organ system is present in flatworms?(A) muscular (B) digestive (C) reproductive (D) excret
- What is the function of calcium ions in muscle contraction?(A)They cause actin and myosin filamen
- Which plant hormone induces and maintains dormancy?(A) gibberellins (B) auxins(C) cytokinins (D)
- Noncyclic photophosphorylation is different from cyclic photophosphorylation in that(A) noncyclic
- Which of the following is an INCORRECT statement about cyanobacteria ?(A) they are photoautotroph
- The tendency for characteristics to be more different in sympatric populations of two species tha
- 公制三角螺紋之牙角為(A)30(B)29(C)55(D)60 度。
- Unlike animals, in plants(A) cell division requires the formation of a cell plate (B) mitosis inv
- A geneticist found that a particular mutation had no effect on the polypeptide coded by a gene. T
- What happens at the nodes of Ranvier?(A) ions flow through the plasma membrane (B) the myelin she
內容推薦
- Which of the following is an INCORRECT statement about fungi? (A) they are heterotrophs (B) most
- A biologist isolated a gene from a human cell, attached it to a plasmid, and inserted the plasmid
- Fermentation is essentially glycolysis plus an extra step in which pyruvic acid is reduced to for
- During kidney dialysis, blood and a dialyzing solution are separated by a semipermeable membrane.
- It takes much longer for sex hormones and other steroids to produce their effects than it takes f
- A peak in_triggers ovulation on about the_day of the monthly cycle.[(A) progesterone ... fourteen
- Mitosis and cytokinesis result in the formation of_, meiosis and cytokinesis result in the format
- In a laboratory, a scientist feeds yeast cells sugar made with radioactive carbon and keeps oxyge
- During the early development of a human embryo the_eventually forms_.(A)blastocoel ... arch enter
- Which of the following people would probably be making the most antidiuretic hormone?|(A)a person
- You would expect a cell with an extensive Golgi apparatus to(A)make a lot of ATP (B) secrete a lo
- The brain perceives the brightness of light by sensing(A) the voltage of action potentials in the
- In what symptoms may be resulted by damage to the corpus callosum?(A) loss of short-term memory(B
- What does the Hardy-Weinberg expression 2pq represent?(A) the gene frequency of the dominant alle
- What prevents an action potential from propagating in both directions along an axon?(A)During the
- Which of the following best represents the path of a signal that causes muscle contraction?(A)mot
- Which developmental sequence is correct?(A)fertilization→gastrulation→blastula formation→morula f
- in the atmosphere, the partial pressure of oxygen is 0.21 atmosphere; of carbon dioxide, 0.000
- The following sequence shows a “gene” encoding a small peptide. The three stop codons are UAA, UA
- Which of the following statements regarding transposons is false?(A)Transposonshave a specific ta
- Which of the following statements is correct about Gram-negative bacteria?(A)Penicillins are effe
- Which of the following statements is true about arteries?(A) arteries always carry deoxygenated b
- 2 . 螺 旋 式 冰 水 主 機 排 氣 高 溫 保 護 跳 脫 溫 度 ( ℃) ? (A)70 (B)130 (C)90 (D)110 。
- 研磨高速鋼或碳鋼,應選用何種磨料之砂輪(A)碳化鈦(B)氧化鋁(C)氧化鈦(D)碳化矽。
- 3 . 若 欲 將 空 氣 除 濕 增 溫,可 用 下 列 何 種 設 備 ? (A) 化 學 除 濕 器(B) 空 氣 清 洗 器 (C)冷 卻 盤 管 (D)加 熱盤管。