Malaria is caused by a parasitic dinoflagellate and is transmitted by the Anopheles mosquito
1.True
2.False
2
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The choanocytes have a flagellum that moves water through the sponge and a collar that extracts food particles from the water. In what group have you encountered very similar cells before?
A. the choanoflagellates B. the chytrids C. the Euglenozoa D. the charophytes E. the Foraminifera
Which type of white blood cell secretes specific antibodies?
A) T cell B) Cytokine C) B cell D) Erythrocyte
For natural selection to occur, adaptive traits must be inheritable. This means that change occurs at the level of DNA. Answer the following question with this in mind
a. How do new traits develop? b. How may the genetic changes contribute to evolution by natural selection? c. How can the degree of similarity in DNA or protein sequence be used to infer the degree of relatedness between species?
Histamines
a. are produced by phagocytes to cause mucous production. b. are produced by mast cells to cause prostaglandin production. c. are produced by complement to attract phagocytes. d. are produced by mast cells to cause capillary dilation. e. are produced by complement to cause capillary constriction.