What is the purpose of the auditory tube?
What will be an ideal response?
Answer: It connects the middle ear to the pharynx and allows equalization of air pressure.
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In 1880, Walther Flemming identified ________, threadlike bodies seen in dividing cells.
Fill in the blank(s) with the appropriate word(s).
Which of the following would probably be the least surprising finding from comparing the genomes of
black cottonwood and thale cress?
a. Black cottonwood and thale cress never shared a common ancestor. d. Black cottonwood has genes that govern secondary growth, but these genes are absent in thale cress. b. Black cottonwood has genes that influence membrane transporters, but thale cress lacks genes that influence membrane transporters. e. Black cottonwood has genes for disease resistance, but thale cress lacks genes for disease resistance. c. Black cottonwood and thale cress have had the same number of gene duplication events throughout their evolutionary history.
What type of protein makes metabolism function efficiently?
a. Enzymes b. Messenger proteins c. Transport proteins d. Storage proteins
Which part of the innate response cuts holes in the cell membranes of pathogens?
A) fibrin B) cytokines C) complement proteins D) antibodies E) histamines