What is unique about the Southern Devil Scorpion?
a. They glow under ultraviolet light
b. Their sting is deadly
c. They reproduce without sex
d. They can lay more than 100 eggs per day
Ans: a. They glow under ultraviolet light
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The mutation that causes SCD causes what kind of change in the structure of hemoglobin?
A) decreases heme-binding ability B) fewer chains of amino acids (trimeric rather than tetrameric structure) C) a single amino acid substitution that alters the structure of the tetramer D) addition of a single amino acid that causes a longer protein subunit E) loss of a single amino acid that causes a frameshift and premature stop codon
Glands that lack ducts and secrete hormones are called ________
A) scent B) exocrine C) mammary D) endocrine
In order to obtain a stable outer shell of electrons, carbon forms four __________
Fill in the blank(s) with the appropriate word(s).
Cell movement involves the coordination of many events in the cell. Which of the following phenomena is not required for cell motility?
(a) Myosin-mediated contraction at the rear of the moving cell. (b) Integrin association with the extracellular environment. (c) Nucleation of new actin filaments. (d) Release of Ca2+ from the sarcoplasmic reticulum.