Each segment of an annelid typically contains bristles of chitin called
A. cilia.
B. chaetae.
C. parapodia.
D. leglets.
Answer: B
You might also like to view...
Molecular oxygen (O2), which is required for the production of ATP by mitochondria, must pass through at least three membranes to get to the enzymes where it is used
O2 is also produced in chloroplasts and must pass through at least four membranes to be released from the plant. How does O2 move across biological membranes? A. There are numerous protein transporters that allow O2 to travel across membranes. B. O2 is nonpolar, and very small, so it can diffuse across the membrane. C. O2 undergoes a chemical reaction that binds it to other substances that are transported across the membranes. D. O2 is hydrophilic and travels with water across the membranes.
The heartbeat originates in the:
A. sinoatrial node located at the junction of the vena cava and the right atrium. B. sinoatrial node located at the junction of the vena cava and the left atrium. C. atrioventricular node located in the wall of the atrioventricular valve. D. atrioventricular node located in the tissue separating the atria and ventricles. E. sinoatrial node and atrioventricular node simultaneously.
True or False: Learning is often based on imitation, including human learning
A. true B. false
What molecule carries out most of the activities of life, including the synthesis of all other biological
molecules?
a. carbohydrate b. lipid c. protein d. nucleic acid e. carbon