________ is the pigment produced by melanocytes that gives skin its color
Fill in the blank(s) with correct word
Melanin
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This phylum of seedless vascular plants has about 1000 known living species, including those in the
genera Lycopodium and Selaginella. The gametophyte of some of these species cannot photosynthesize, and instead uses mycorrhizae to obtain nutrients
a. Hepatophyta b. Pterophyta c. Bryophyta d. Lycophyta e. Anthocerophyta
Josefa narrowly escapes being hit by a car while riding her bike to class. Her heart rate increases and her pupils dilate. Which system is at work here?
a. The sympathetic nervous system b. The peripheral nervous system c. The parasympathetic nervous system d. The autonomic nervous system
Males that tend to be taller than average and show mild mental impairment may have
a. XXY chromosomes. b. XYY chromosomes. c. Turner syndrome. d. Down syndrome. e. Klinefelter syndrome.
Design a complete ecosystem that would sustain a number of living organisms for several years in a sealed container
The only thing that can be added is sunlight. Explain why you have selected each organism. What will be an ideal response?