Why would a person not get vitamin A from a salad filled with leafy green vegetables unless the salad also has some fat source such as nuts, cheese, or meat?
A) because vitamin A is fat-soluble
B) because vitamin A is only found in meat
C) because vitamin A is water-soluble
D) because vitamin A is needed to maintain osmotic balance of human cells
Answer: A
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Of the following organisms, which can be described as a fastidious obligate intracellular parasite that multiplies by binary fission in the cytoplasm of host cells and infects humans as accidental hosts in most cases?
a. Rickettsia b. Chlamydia c. Calymmatobacterium d. Coxiella
Unlike herbaceous eudicot stems, monocot stems do not have distinct areas of cortex and pith. Instead, their ____
functions as the cortex and pith. a. endodermis b. ground tissue c. meristem d. vascular cambium e. periderm
Organs in the coelom of an animal are held in place by the
A. muscles. B. bones. C. inner tube. D. mesenteries.
A cladogram grouped birds with reptiles because the bird characteristic of ________ was not emphasized.
Fill in the blank(s) with the appropriate word(s).