Protozoa can survive changes in pH, nutrient availability or temperature as (conidospores /cysts/trophozoites).
Fill in the blank(s) with the appropriate word(s).
cysts
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Nearly all ecosystems receive a constant input of energy from ____
a. bacteria b. biomass c. nutrients d. plants e. the sun
Which cells produce specific antibodies?
A. B cells B. macrophages C. plasma cells D. T cells E. monocytes
A student proposes that left-handedness is a recessive trait and is hidden in much of the human population. A survey of his class of 36 students finds that 9 students are left-handed. Using the Hardy-Weinberg formula, what would be the expected allelic and genotypic frequencies in this theoretical population?
A. P =.75 q =.25; p2 =.56, 2pq =.25, q2=.25 B. P =.27 q =.09; p2 =.07, 2pq =.048, q2=.00479 C. P =.5 q =.5; p2 =.25, 2pq =.50, q2=.25 D. They cannot be estimated using these limited data.
Consider the cladogram shown. Which pair of species shares the greatest number of derived characters (synapomorphies)?
A. 1 and 3 B. 6 and 4 C. 6 and 3 D. 6 and 5 E. 2 and 3