The chapter story describes research by biologists into the allopatric speciation of lizards on different islands and into the sympatric speciation of corals with small variations in depth range. Reproductive isolation is required for both types of speciation. Match the type of reproductive isolation with the example that describes it. Some types of isolation do not have a matching example. a. Two lizards from different islands mate together to produce offspring with patchy scales that dehydrate very quickly.
b. A coral egg fertilized by the sperm of another coral does not reach the larval stage.
c. During mass spawning events, multiple species of coral release sperm and eggs that cannot fuse.
d. One coral spawns in the morning and the other spawns in the evening.
e. Lizards on different islands attract mates with up-and-down head bobs or side-to- side head bobs.

1. Gametic isolation
2. Mechanical isolation
3. Hybrid sterility
4. Zygote death
5. Hybrid performance
6. Ecological isolation
7. Behavioral isolation

Where does all the water go? according to the environmental protection agency (epa), in a typical wetland environment, 39% of the water is outflow; 46% is seepage; 7% evaporates; and 8% remains as water volume in the ecosystem (reference: united states environmental protection agency case studies report 832-r-93-005). chloride compounds as residuals from residential areas are a problem for wetlands. suppose that in a particular wetland environment the following concentrations (mg/l) of chloride compounds were found: outflow, 60.4; seepage, 73.7; remaining due to evaporation, 26.4; in the water volume, 46.8. (a) compute the weighted average of chlorine compound concentration (mg/l) for this ecological system. (round your answer to one decimal place.) mg/l (b) suppose the epa has established an average chlorine compound concentration target of no more than 58 mg/l. does this wetlands system meet the target standard for chlorine compound concentration? yes. the average chlorine compound concentration (mg/l) is too high. yes. the average chlorine compound concentration (mg/l) is lower than the target. no. the average chlorine compound concentration (mg/l) is lower than the target. no. the average chlorine compound concentration (mg/l) is too high.

Explain why ecosystem diversity results in species diversity in a healthy biosphere

Recently, crops of vegetables such as lettuce and green onions have been contaminated, while they are still on the farm, with bacteria that cause food poisoning. how will science influence the way the government responds to prevent an increase in food-borne diseases? because science has shown that lettuce and green onions are not nutritionally valuable, the government may pass laws that ban the sale of lettuce and green onions. because science has shown that there is no way to prevent bacterial contamination, the government may pass laws that punish businesses that buy lettuce and green onions. because science has shown that the washing of hands prevent the spread of infectious diseases among people, the government may pass laws that require hand washing by everyone who handles food. because science has shown there are ways to find the source of the contamination, the government may pass laws that require farm practices that reduce the contamination of lettuce and green onions.