The gene that produces the enzyme placental alkaline phosphatase in humans starts at position 232 million on chromosome 2 (which is 242 million bp long). a. Draw a single copy of chromosome 2 in un-replicated form (one chromatid). Note that chromosome 2 is submetacentric (centromere is near the middle, but closer to the beginning). Indicate the location of the placental alkaline phosphatase (PLAP) gene.
b. PL4P has two common alleles, let's call them. P. and Pz. Draw your homologous chromosome 2 pair assuming you have one copy of both alleles.

Recent research by marine biologists suggests that bottlenose dolphins have names for themselves. scientists played sounds they had identified as the names of particular dolphins, putting them through a synthesizer so that they did not sound like the voices of particular dolphins. the researchers found that dolphins would respond to the names of other dolphins that they were related to or associated with, but they ignored the names of strangers. this discovery suggests a much greater degree of self-awareness in aquatic mammals than was previously suspected. if this research holds up, what does it suggest about dolphins?

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

Are the earth's ocean floor and continents the same age geologically? why or why not?