In the body, infections are often associated with ________, a whitish mixture of dead bacteria, damaged tissue, and white blood cells
Fill in the blank(s) with correct word
pus
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Which of the following statements provides evidence that organelles (e.g., mitochondria and chloroplasts) originated billions of years ago as a result of primitive eukaryotic cells engulfing free-living bacterial cells? (Choose all that apply)
A. Their DNA is usually circular. B. They have an inordinate amount of noncoding DNA. C. They do not synthesize proteins. D. Their DNA is packed as a nucleoid rather than as a chromosome.
What best describes the greenhouse effect?
Which of the following is NOT an important feature in distinguishing animals from each other?
a. presence and cellular arrangement of tissues b. growth of skeletal elements c. body symmetry d. development of the gut e. method of locomotion (movement)
Synaptic vesicles are
a. at the ends of dendrites and axons b. at the ends of axons only c. along the length of all long fibers d. at the ends of interneurons only e. both b and d are correct