問題詳情
39. Three kinds of selection occur that cause changes in the normal distribution of phenotypes in a population. They are
(A) directional selection, disruptive selection, and stabilizing selection.
(B) natural selection, artificial selection, and environmental selection.
(C) natural selection, genetic drift, and stabilizing selection.
(D) microevolution, macroevolution and natural selection.
(E) natural selection, artificial selection, and differential selection.
(A) directional selection, disruptive selection, and stabilizing selection.
(B) natural selection, artificial selection, and environmental selection.
(C) natural selection, genetic drift, and stabilizing selection.
(D) microevolution, macroevolution and natural selection.
(E) natural selection, artificial selection, and differential selection.
參考答案
無參考答案
內容推薦
- What percentage of the DNA in a typical eukaryotic cell is expressed at any given time?(A) 3-5%
- The theory that suggests that eukaryotic organelles such as mitochondria and chloroplasts may ha
- Which of the following is not true of a codon?(A) It consists of three nucleotides. (B) It may c
- Which of the following can be used as a cloning vector?(A) E. coli (B) Eco RI (C) lambda phage (
- In eukaryotes, what is the active transcription generally associated with?(A) Euchromatin only (
- A woman had several miscarriages. Her doctor suspected that a hormonal insufficiency was causing
- The extinction of plants has severe consequences because:(A) plants do not have the extensive ra
- Which of the following is not a part of lichens?(A) fungi (B) green algae (C) brown algae (D) cy
- DNA replication occurs in(A) meiosis. (B) mitosis. (C) G1 phase. (D) G2 phase. (E) S phase.
- Lipids are absorbed by the ___ system.(A) urinary (B) blood vascular (C) reproductive (D) respir
內容推薦
- What is the important component retain the violet dye in the Gram-positive bacteria cell wall?(A
- Among the invertebrates, arthropods are unique in possessing(A) a notochord. (B) open circulatio
- Important terrestrial adaptations that evolved exclusively in seed plants include all of the fol
- Which of the following definitions of “Animal” is not true?(A) Animals are multicellular eukaryo
- Transport in plants include all of the following except(A) absorption of water and minerals from
- Antibodies of the different classes IgM, IgG, IgA, IgD and IgE differ from each other in(A) the
- A hummingbird with a beak that is too short to pollinate a flower is an example of(A) behavioral
- Which of the following signal transduction molecules is not bound to the plasma membrane?(A) G p
- Reabsorption of useful components of glomerular filtrate occurs in(A) Bowman’s capsule. (B) prox
- Yeast is a member of which division?(A) Ascomycota (B) Zygomycota (C) Basidiomycota (D) Deuterom
- Which of the following is true?(A) The leaves of both angiosperms and gymnosperms are covered by
- Two animal species live in the same biome but on different continents. Although these two are no
- Which of the following enzymes has the lowest pH optimum?(A) lipase (B) pepsin (C) trypsin (D)su
- Suppose a mutation occurred in Drosophila in the region of DNA that codes for the protein called
- What is the basis for the difference in the synthesis of the leading and lagging strands of DNA
- Which of the following statements about photosynthesis is not true?(A) Photosynthesis is a redox
- The Genetic Code is almost universal, that is, it is the same in all living systems. What is the
- The direct energy source that drives ATP synthesis during oxidative phosphorylation is(A) the ox
- Which of the following statements is a correct distinction between autotrophs and heterotrophs?(
- A _ _ is a membrane-enclosed bag of hydrolytic enzymes that the cell uses to digest macromolecul
- Which of the following pieces of evidence most directly contradicted the hypothesis that viruses
- Of the plant hormones, which one most directly stimulates cell division and delays senescence?(A
- Eukaryotic promoters usually have a nucleotide sequence about 25 nucleotides upstream from the t
- What part of the brain affects the emotional aspects of behaviors？(A) reticular activating syste
- 導磁係數(permeability)的單位為何？(A)庫倫／米 2(B)亨利／米 (C)伏特／韋伯 (D)歐姆／特斯拉