Your colleague is studying a newly discovered organism. She is becoming increasingly convinced that the organism is an arthropod. You find that you must respectfully disagree when you note that the organism has a set of distinctly nonarthropod characteristics. The features that cause you to exclude the organism from the arthropod grouping are
A. jointed legs, ecdysis, and an exoskeleton.
B. antennae, six legs, and mandibles.
C. compound eyes, book lungs, and a hemocoel.
D. Malpighian tubules, ommatidia, and tagmata.
E. pseudocoel, closed circulatory system, and ventral heart.
E. pseudocoel, closed circulatory system, and ventral heart.
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How would you argue that meiosis is the basis for sexual reproduction in plants, even though the direct result is a spore rather than a gamete?
What will be an ideal response?
What accounts for the lysis of a bacterial cell in the presence of a membrane attack complex?
A. loss of cytoplasm due to the presence of large channels in the membrane B. unregulated signaling due to the addition of novel proteins to the cell's membrane C. increased osmosis leading to swelling and rupture of the cell D. apoptosis due to the loss of DNA
Evolution is the result of selecting only those mutations that result in an increased reproductive success
Indicate whether the statement is true or false
In human gene therapy, genes are transferred by
a. viral vectors or lipid clusters b. bacterial cells. c. bacterial plasmids. d. hypodermic injection. e. tissue transplantation.