An axenic environment is one
A. in which microorganisms remain with the person throughout life.
B. that is free of microbes.
C. that is a source of contamination.
D. in which microorganisms remain present only for a short time.
E. contaminated by microbial toxins.
Answer: B
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Which of the following statements about Malpighian tubules is correct?
A. All the answer options are correct. B. They are a series of tubes that empty into the hindgut of insects. C. They actively secrete uric acid and excess electrolytes while retaining key solutes. D. They allow insects to live in dry terrestrial environments. E. They allow for excretion nitrogenous wastes with minimal water loss.
Why does sickle-cell hemoglobin (HbS) migrate slower than normal hemoglobin (HbA) during gel electrophoresis?
What will be an ideal response?
Diploblastic organisms differ from triploblastic organisms in that diplobastic organisms are
A. larger than triploblastic organisms. B. bilaterally symmetrical. C. simpler in structure than triploblastic organisms. D. able to reproduce sexually rather than asexually.
In cell division, the separation of duplicated chromosomes is ________
Fill in the blank(s) with correct word