Darker skin color is correlated with ____
a. the northern hemisphere
b. inland regions
c. coastal regions
d. longitude
e. the intensity of UV radiation
e
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List the primary germ layers formed by gastrulation. What tissues will they form in the adult?
Endoderm: Mesoderm: Ectoderm:
Cyanobacteria
a) can fix nitrogen, thus causing many freshwater ecosystems to be limited by phosphorus availability. b) can mineralize phosphorus from wetland sediments, raising phosphorus levels in inland waters to the point of eutrophication. c) mineralize the phosphates in detergent from an organic corm into an inorganic form that can cause algal blooms and eutrophication. d) consume excess N and P in inland waters and so are essential tools for watershed restoration and management e) occur when aquatic ecosystems are disrupted by invasive species, and can cause pathogenic infections of native species, further enhancing the invasive nature of introduced exotic invaders.
Shortly before the midpoint of the menstrual cycle, estrogen from the mature follicle triggers a surge in LH, which stimulates which one of the following events?
A) cervix dilation B) uterus contractions C) inhibition of FSH release D) downward movement of fimbriae E) ovulation
How may an enhancer sequence facilitate transcription?
What will be an ideal response?