Squids and octopuses move by means of water movement through their
A. tentacles.
B. cilia and flagella.
C. modified mantle cavity.
D. muscular foot.
E. radula.
C. modified mantle cavity.
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Which major tissue type contains contractile cells?
a. epithelium b. connective tissue c. muscle tissue d. nervous tissue e. adipose tissue
Which of the following is most likely an accurate description of the genetic influences on ASD?
A) monozygotic B) recessive, sex-linked C) autosomal and epistatic D) probably multi-genetic
Which of the following conclusions can be made if two identical insertion sequences are identified in separate locations on a chromosome?
A. The insertion sequence was a "cut-and-paste" transposon. B. The insertion sequence was transferred via replicative transposition. C. The insertion sequence was transferred via simple transposition. D. A mutation occurred during transposition of the insertion sequence.
Which of the following statements is true?
A) The temperate deciduous forest is composed of a high diversity of deciduous trees that lose their leaves in the fall because of low soil fertility. B) Agriculture is often not very successful in grasslands because of the poor soils. C) The high species diversity of a tropical rain forest is supported by a high diversity of soil organisms, high soil fertility, and high rainfall. D) Agriculture is often not very successful in a tropical forest because of the poor soils.