Which two organisms should be used to determine the validity of urea agar for quality control purposes?
a. P. fluorescens and B. cepacia complex
b. Ralstonia mannitolilytica and Acidovorax delafieldii
c. Brevundimonas diminuta and Brevundi-monas vesicularis
d. B. vesicularis and R. pickettii
D
The only two organisms that are negative and positive, respectively, are B. vesicularis and R. pickettii, and they can be used for quality control purposes.
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Why is it necessary to take an interdisciplinary approach to studying biology?
A. Research methods used to solve many biological questions often require a number of different types of approaches and the expertise of a variety of scientists. B. An interdisciplinary approach is the only way we can further our biological knowledge. C. Interdisciplinary approaches are required to answer all scientific questions since all disciplines borrow knowledge from each.
Examine Figure 23.2 in your textbook. According to the figure, the closest relatives of turtles are:
A. lizards and snakes. B. sauropsids. C. tetrapods. D. crocodiles and alligators. E. hagfish.
Which of the following types of cells is matched with the wrong stem cell category?
A. embryonic stem cells: pluripotent B. embryonic germ cells: pluripotent C. hematopoietic stem cells: multipotent D. myeloid cell: unipotent E. zygote: totipotent
Bands of connective tissue that help muscles attach to bones are termed ________
A) ligaments B) cartilage C) tendons D) fibrocartilage