問題詳情
18.Nitrogen fixation is
(A)using nitrogen to build molecules such as proteins and nucleic acids
(B)converting nitrogen in the air into a form usable by plants
(C)recycling nitrogen from organic matter in the soil
(D)absorbing N2 from the soil
(E)an unhealthy interest in nitrogen
(A)using nitrogen to build molecules such as proteins and nucleic acids
(B)converting nitrogen in the air into a form usable by plants
(C)recycling nitrogen from organic matter in the soil
(D)absorbing N2 from the soil
(E)an unhealthy interest in nitrogen
參考答案
無參考答案
內容推薦
- Which of the following correctly matches an organelle with its function?(A) mitochondria — photos
- Which of the following responses that plants cope with water deficit is INCORRECT?K (A) reducing
- Scientists think that some birds may find their way during migration by(A) imprinting on faint od
- An eutrophic lake is usually characterized by its(A) shallow water depth and high nutrient conten
- A biodiversity hot spot is(A)a low species diversity in a small area (B) a low species diversity
- _ are generally characterized by sporophyte with vascular system and without seed production in li
- Which of the following is an INCORRECT statement about plants?(A) they are sometimes referred to
- A species concept defined by phenotypic characters is referred as(A) biological species concept(B)
- Mitochondria and chloroplasts have double membranes because(A) their DNA is light-sensitive(B) the
- "Which of the following statements about nonspecific defenses is false?(A)they include inflam
內容推薦
- Two of the most common second messengers are(A) calcium ion and cAMP (B) GTP and GDP (C) kinase a
- "Whales and dolphins are known to send out clicking sounds and listen to the echoes. This su
- The concentration of calcium in a cell is 0.3%. The concentration of calcium in the surrounding f
- A structure in seed, which is equivalent to a leaf, is(A)seed coat (B) plumule (C) endosperm (D)
- A flower without sepals and petals is most likely pollinated by (A) bees (B) moths (C) bats (D) wi
- What is a key difference between mitosis and meiosis?I (A) only mitosis has a metaphase (B) siste
- How does AZT (azidothymidine) block DNA replication?(A) AZT forms base pair with any other nucleo
- What happens to a tKNA molecule during and after its participation in protein synthesis?(A)it is
- Which of the following hormones has the broadest range of targets?(A) ADH (B) oxytocin (C) TSH (D
- Which part of a bone is likely to have the greatest concentration of cells?(A) compact bone (B) s
- During a secondaiy immune response,(A)selected B cell generates antibody-producing effector B cel
- The function of a mature B cell is to(A) make antibodies against several different antigens(B) ma
- 31-65題’每題2分。70%_:_說明:每題選出一個最適當的選項，標示在答案卡上。每題答對得2分，答錯倒扣0.5分，未作答者 ，不給分亦不扣分。__A nursing infant is ab
- Which gland and organ work together to regulate the sodium level in the blood?(A) adrenal gland a
- What happens at the nodes of Ranvier?(A) ions flow through the plasma membrane (B) the myelin she
- A geneticist found that a particular mutation had no effect on the polypeptide coded by a gene. T
- Unlike animals, in plants(A) cell division requires the formation of a cell plate (B) mitosis inv
- 公制三角螺紋之牙角為(A)30(B)29(C)55(D)60 度。
- The tendency for characteristics to be more different in sympatric populations of two species tha
- Which of the following is an INCORRECT statement about cyanobacteria ?(A) they are photoautotroph
- Noncyclic photophosphorylation is different from cyclic photophosphorylation in that(A) noncyclic
- Which plant hormone induces and maintains dormancy?(A) gibberellins (B) auxins(C) cytokinins (D)
- What is the function of calcium ions in muscle contraction?(A)They cause actin and myosin filamen
- Which organ system is present in flatworms?(A) muscular (B) digestive (C) reproductive (D) excret
- Which of the following structures is incorrectly paired with its function?i(A)epididymis - matura