Skin color in humans is a(n) ____________________ trait.Fill in the blank(s) with the appropriate word(s)
multifactorial
complex
polygenic
complex multifactorial
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Members of the ____ Lophotrochozoan phylum are acoelomate, dorsoventrally flattened,and do not have circulatory
or respiratory systems.
a. Rotifera b. Mollusca c. Platyhelminthes d. Annelida e. Nemertea
The adjustment of the shape of the lens by the ciliary muscle is:
a. visual accommodation b. refraction c. reflection d. photoreception e. perception
Breaking actin-myosin bonds requires
a. ATP. b. ADP. c. calcium. d. phosphorus. e. sodium.
An individual mixotroph loses its plastids, yet continues to survive. Which of the following most likely accounts for its continued survival?
A) It relies on photosystems that float freely in its cytosol. B) It must have gained extra mitochondria when it lost its plastids. C) It engulfs organic material by phagocytosis or by absorption. D) It has an endospore.