Albinism, lack of pigmentation in humans, results from an autosomal recessive gene (a). Two parents with normal pigmentation have an albino child. What is the probability that their next three children will be albino?
What will be an ideal response?
1/4 × 1/4 × 1/4 = 1/64
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What is a major role that fungi play in ecosystems?
A) Recycling nutrients from dead organisms back into the food chain B) Fixing carbon from the atmosphere C) Synthesizing glucose from carbon dioxide and water D) Photosynthesis
Organisms that reproduce repeatedly are said to be
A. semelparous. B. iteroparous. C. r-selected D. cohorts. E. K-selected
In the hydrologic cycle, water moves from the land to the air by ____ and returns to the land via ____
a. precipitation; evaporation and transpiration b. precipitation and evaporation; transpiration c. precipitation and transpiration; evaporation d. transpiration; precipitation and evaporation e. transpiration and evaporation; precipitation
"N" is the chemical symbol for
A. nickel. B. neon. C. nitrogen. D. magnesium. E. copper.