Arthropods' have nervous systems composed of a nerve net
Indicate whether the statement is true or false.
ANS: F, Animals with radial symmetry
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How do sodium-potassium pumps work?
a. Sodium is pumped into the cell and potassium diffuses out. b. Sodium is pumped out of the cell and potassium diffuses in. c. Sodium and potassium are both pumped into the cell simultaneously. d. Sodium and potassium are both pumped out of the cell simultaneously. e. Sodium only binds to the pump to make it receptive to potassium which then is pumped into the cell.
Which of the following is a condition caused by a sex-linked inheritance in which a male child will bleed extensively because he lacks the physiological properties to form a blood clot?
A) color blindness B) male-pattern baldness C) hemophilia D) sickle-cell disease
How do humans benefit from growing plants?
What will be an ideal response?
A bird flashing white patches underneath its wings is an example of what type of communication?
A) Sound B) Chemical C) Passive visual D) Physical contact E) Active visual