Diagram and label the internal structure of a chloroplast. Briefly describe the function of each structure you labeled. What will be an ideal response?
The diagram should be similar to Fig. 9-4b except no need to include the inner and outer
membranes because the question asks for internal structures. Functions include 1) thylakoid
membrane/granum = location of photosynthetic pigments and light-dependent reactions, 2)
thylakoid lumen = establishment of proton gradient for chemiosmosis, 3) stroma = location
of enzymes for the Calvin cycle.
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How does gene flow affect the genetic composition in populations?
A. Gene flow promotes genetic diversity by introducing new alleles into populations. B. Gene flow tends to make the allele frequencies in neighboring populations more similar to each other. C. Gene flow promotes genetic diversity by introducing new alleles into populations and gene flow tends to make the allele frequencies in neighboring populations more similar to each other. D. Gene flow promotes genetic similarities by removing alleles from a population.
The formation of the bivalent during meiosis
A. is required for the pairing of homologous chromosomes. B. contributes to the genetic diversity of a species. C. ensures that the resulting haploid cells will have the same combination of homologous chromosomes as the original diploid cell. D. aids the alignment of sister chromatids in a single row along the metaphase plate. E. occurs during meiosis I and meiosis II.
Conservationists prevented the construction of a __________ in order to save endangered
snail darters
a. dam b. highway c. national park d. overpass
Which of the following is not a type of prezygotic reproductive isolation?
A. temporal isolation B. gametic isolation C. hybrid infertility D. ecological isolation E. mechanical isolation