In flatworms, the ____ is/are used to gather food.

A. nephridia
B. contractile vacuoles
C. Malpighian tubules
D. pharynx
E. flame cells


Answer: D

Biology & Microbiology

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A gel electrophoresis is performed, but when the gel imager is used, no bands appear. The researcher might have forgotten to:  

_____  add electric current. _____  add antibody. _____  ligate the DNA fragments together. _____  include DNA dye. _____  include an RNA probe. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean?   Gather Content · What do you already know about gel electrophoresis?   Consider Possibilities · Consider the different answer options. Which can you rule out?   Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?   Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?  

Biology & Microbiology

All invertebrates have phagocytic cells, but lack antibodies

Indicate whether the statement is true or false.

Biology & Microbiology

Physiological changes in ectotherms that change their temperature tolerance as the seasons change

from winter to summer are called

a. estivation. b. hyperthermia. c. thermal acclimatization. d. hypothermia. e. hibernation.

Biology & Microbiology

___________ are formed when monglycerides and fatty acids are rejoined in the villi epithelia cells

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology