Barnacles are
a. parasites.
b. herbivores.
c. predators.
d. filter feeders.
e. all of these.
Answer: d
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Researcher A studies the protein interactions involving the polypeptides that comprise hemoglobin, while Researcher
B studies protein interactions between a protein kinase and its target protein. Researcher A will therefore focus on ____, and researcher B will focus on ____.
a. protein localization; protein sequence b. protein sequence; protein localization c. permanent protein interactions; transient protein interactions d. transient protein interactions; permanent protein interactions e. protein regulation; transcriptional regulation
Which is a normal sequence of development?
a. I >>> II >>> III b. I >>> IV >>> V c. II >>> III >>> V d. III >>> II and IV >>> I e. I >>> IV and II >>> V
The gametophyte of most liverworts is referred to as:
a. a seta. b. gemmae. c. a thallus. d. a frond. e. a prothallus.
Research has shown that certain body cells, known as stem cells, can develop into a variety of specialized cells. Various factors can cause stem cells to develop into different types of mature cells. These different types of mature cells result from
A. different antibodies and mitotic cell division B. identical genetic codes and meiotic cell division C. different environments of the cells and the functioning of different parts of the genetic code D. similar steps in the development of the cells and a reduction in the number of chromosomes in each cell