What binds pairs of chromosomes together?
a. linker DNA
b. cohesion proteins
c. histone proteins
d. centromeres
b. cohesion proteins
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Which vertebrates rely on a positive pressure filling mechanism to move air into their lungs?
A. human B. eagle C. bullfrog D. crocodile E. mouse
Which of the following statements is true?
a. The left and right portions of this life cycle illustrate asexual and sexual reproduction, respectively. b. The left and right portions of this life cycle illustrate sexual and asexual reproduction, respectively. c. Both portions of this life cycle illustrate asexual reproduction, because this organism does not reproduce sexually. d. Both portions of this life cycle illustrate sexual reproduction, because this organism does not reproduce asexually. e. Meiosis occurs in both portions of the life cycle.
One plasma cell will secrete antibodies of various classes, but the antibodies will all have the same specificity.
Answer the following statement true (T) or false (F)
The envelope of a mumps virus
A) helps the virus enter the cell. B) is coded by host genes. C) helps the virus insert its DNA into the host cell genome. D) accounts for viral resistance to antibiotics.