Which characteristics do annelids and arthropods have in common?
A) Both have feeding grooves.
B) Both exhibit metamorphosis.
C) Both are metameric.
D) Both have a chitin-based body covering.
Answer: C
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Three physiological factors that affect the color of skin are: volume of blood in dermal vessels, carotene in the subcutaneous layer, and various diseases.
Answer the following statement true (T) or false (F)
You are helping your dad prepare food in the kitchen. Dad has a tablespoon of water in one hand and a tablespoon of vegetable oil in the other, when he trips over the rug and spills both spoons on the countertop. Dad notices that the oil forms a thin film on the countertop, whereas spilled water forms smaller, taller beads. How should you explain the different behavior of these liquids to your
dad? What will be an ideal response?
The work of breathing normally requires about 3% of total energy expenditure, this increases under all of the following situations except
a. when elastic recoil is decreased. b. when resistance goes up. c. when the partial pressure of oxygen decreases in the air. d. when ventilation must be increased. e. it increases with all of the above
Imagine the following scenario: Blood pressure decreases below normal levels.? Blood flow to the heart decreases ? Heart is unable to pump as much blood.? Blood pressure decreases even more.This is an example of ________ feedback.
A. negative B. positive