The term heterotroph refers to an organism that
A. uses CO2 for its carbon source.
B. must obtain organic compounds for its carbon needs.
C. gets energy by oxidizing inorganic compounds.
D. does not need a carbon source.
E. gets energy from sunlight.
Answer: B
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What type of an extracellular matrix does blood have?
a. gel-like b. matrix hardened by calcium and phosphorus c. fluid d. glycoprotein rich e. tightly packed with fibres
A biology student is studying ground squirrels in a local park. She has captured, measured, and released many ground squirrels from an upland, rocky, wooded area, and many similar ground squirrels from a shrub area in soft soil near a stream. She is measuring skull dimensions, leg and claw lengths and shapes, and other traits of the ground squirrels from each collection area. She is involved in
A. phylogenetics. B. genetics and inheritance. C. speciation. D. All of the answer choices are correct. E. taxonomy.
A pellicle is NOT
a. thin. b. inside the plasma membrane. c. made of elastic proteins. d. intended to protect the cell. e. involved in retaining the shape of the cell..
Figure 36.6
Use the figure above to answer the following question.
?
The anatomical structure identified with the letter "R" in the figure above is the ____.
A. pericardium B. cardiac muscle C. inferior vena cava D. right atrium E. heart apex