An inherited human disorder, familial dysautonomia, results from a nucleotide mutation in the gene IKAP that is expressed in the nervous system
The decreased IKAP protein leads to abnormal development, and the resulting disease is usually fatal by age 30. The nucleotide change alters splicing. If this change affects only the nervous system and not the immune system, in which the gene is also expressed, what feature must be found in this gene?
alternative splicing
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While strolling through an arboretum, a very tall tree bearing relatively small pollen-producing cones and short, needle-like leaves catches your eye. What else is also likely true of this species?
_____ It produces resin. _____ It is pollinated by moths. _____ It is a monocot. _____ Its water-conducting cells are protected from desiccation by tori. ______ Its leaf surfaces are protected from desiccation by a thick waxy cuticle.
If you eat a hamburger, you are mainly eating ground-up beef muscle. What levels of organization are represented in this ground-up muscle?
A) organism, population, and community B) organ, organ system, and organism C) organelle, cell, and tissue D) tissue, organ, and organ system
Complement proteins can do all of the following except
A) enhance phagocytosis by innate immune cells by attaching to cell invaders. B) help trigger the inflammatory response. C) attack cancer and virus-infected cells after they are released by natural killer cells. D) act as chemical signals to recruit more immune cells to the site of infection.
endotherms
What will be an ideal response?