Most of the ocean’s productivity occurs
a. in the open ocean
b. in the intertidal zone.
c. in the neritic zone.
d. near hydrothermal vents.
e. in the benthic province.
Answer: c
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The various beak sizes, shapes and foraging habits of Darwin's __________ were an important observation that contributed to Charles Darwin's development of his theory of evolution by natural selection.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements about T lymphocytes is FALSE?
A) T lymphocytes produce antibody molecules. B) T lymphocytes directly attack cells and produce the cell-mediated immune response. C) T lymphocytes are called such because they mature in the thymus. D) T lymphocytes have TCRs that recognize antigen only if it is bound to MHC. E) There are three types of T lymphocytes.
In Drosophila, an individual female fly was observed to be of the XXY chromosome complement (normal autosomal complement) and to have white eyes as contrasted with the normal red eye color of wild type. The female's father had red eyes, and the mother
had white eyes. Knowing that white eyes are X-linked and recessive, present an explanation for the genetic and chromosomal constitution of the XXY, white-eyed individual. A) nondisjunction in either meiosis I or meiosis II of the mother B) nondisjunction in meiosis II of father C) nondisjunction in meiosis I of mother D) nondisjunction in meiosis I of mother and meiosis II of father E) nondisjunction in meiosis II of mother
Answer the following questions true (T) or false (F)
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