In Tanzania, 4% (0.040) of the population are homozygous sickle-cell anemics (ss) and 32% (0.320) are heterozygous (Ss). From this data, calculate the proportion of alleles that are s and S.

Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

For the strategies below, decide whether they are best described as demand-side solutions or supply-side solutions to meeting human needs for fresh water. remember that a demand-side solution reduces demand for fresh water, whereas a supply-side solution increases the supply of fresh water. (a) damming a river to create a reservoir (b) desalinating seawater (c) a nation invading a neighboring country to access their rivers (d) raising water prices for consumers and businesses (e) providing tax breaks for companies that use less water (f) replacing inefficient irrigation with more-efficient drip irrigation to grow crops (g) requiring low-flow showerheads in all new homes