問題詳情
17. The diploid sporophyte stage is dominant in the life cycles of all of the following except
(A) a fern.
(B) a moss.
(C) a pine tree.
(D) a dandelion.
(E) a rose bush.
(A) a fern.
(B) a moss.
(C) a pine tree.
(D) a dandelion.
(E) a rose bush.
參考答案
無參考答案
內容推薦
- The main contributing factor to the release of CFC’s is(A) decomposition in land fills. (B) acid
- The sodium-potassium pump is termed electrogenic because(A) it hydrolyzes ATP.(B) it pumps posit
- Most CO2 from catabolism is released during(A) glycolysis. (B) lactate fermentation. (C) the Kre
- Most of the zygotic segmentation genes code for(A) special transfer RNA. (B) enzyme. (C) transcr
- Which of the following domains combines dimerization and DNA-binding surfaces in a long helix?(A
- Which of the following factors would tend to increase membrane fluidity?(A) a greater proportion
- Which colors are absorbed by chlorophyll?(A) violet, blue and red (B) violet, green and red (C) b
- 關於坐標平面上函數y=sinx 的圖形和 的圖形之交點個數，下列哪一個選項是正確的？(A) 交點的個數是無窮多(B) 交點的個數是奇數且大於20(C) 交點的個數是奇數且小於20(D) 交點的個
- Brian was found to be heterozygous (Ss) for sickle-cell trait. The alleles represented by the let
- Evolutionary biologists generally agree that the primary mechanism responsible for evolution is(A
內容推薦
- Mark found an organism in a pond, and he thinks it’s a freshwater sponge. His friend Ralph think
- Which of the following is not directly associated with photosystem II?(A) photophosphorylation (
- A major difference in the mechanism of action between steroid and peptide hormones is that(A) st
- Which of the following pairs of body systems primarily regulates the activities of the other sys
- Which of the following best illustrates homeostasis?(A) All the cells of the body are about the
- A man who carries an X-linked allele will pass it on to(A) all of his sons. (B) half of his sons
- A technique used in molecular systematics relies on the comparison of cytochrome c in different
- Which of the following is a characteristic of all organisms, but not of viruses?(A) genetic info
- Which of the following statements is not true?(A) Chloroplast and mitochondria generate ATP by t
- Countercurrent exchange in the gills of a fish(A) maintains a gradient that enhances diffusion.(
- Researchers suspect that cytotoxic T cells are usually able to find and attack cancer cells beca
- Lipids are absorbed by the ___ system.(A) urinary (B) blood vascular (C) reproductive (D) respir
- DNA replication occurs in(A) meiosis. (B) mitosis. (C) G1 phase. (D) G2 phase. (E) S phase.
- Which of the following is not a part of lichens?(A) fungi (B) green algae (C) brown algae (D) cy
- The extinction of plants has severe consequences because:(A) plants do not have the extensive ra
- A woman had several miscarriages. Her doctor suspected that a hormonal insufficiency was causing
- In eukaryotes, what is the active transcription generally associated with?(A) Euchromatin only (
- Which of the following can be used as a cloning vector?(A) E. coli (B) Eco RI (C) lambda phage (
- Which of the following is not true of a codon?(A) It consists of three nucleotides. (B) It may c
- The theory that suggests that eukaryotic organelles such as mitochondria and chloroplasts may ha
- What percentage of the DNA in a typical eukaryotic cell is expressed at any given time?(A) 3-5%
- What hormone is essential for a tadpole to develop into an adult frog?(A) growth hormone (B) ins
- Three kinds of selection occur that cause changes in the normal distribution of phenotypes in a
- In a population that is in Hardy-Weinberg equilibrium, the frequency of the allele a is 0.Wha
- What is the important component retain the violet dye in the Gram-positive bacteria cell wall?(A