You’re an international athlete. For breakfast you had a lemon poppyseed muffin. Now theres a knock at your door. It is the internation no drugs in athletes committee. They want a sample of your urine for a drug test. What sort of test are they going to perform? How does […]

In a grassland system in Connecticut, Schmitz (2009) and his colleagues described a series of interactions among trophic levels. The red-legged grasshopper, Melanoplus femurrubrum, prefers to graze the grass Poa pratensis (smooth meadow-grass). However, if the ambush predator Pisaurina mira (nursery-web spider) is present, the spider waits in Poa pratensis. […]

Hungtington disorder is a progressive degeneration of the nervous system that begins at middle age and results in an early death. It is caused by a single autosomal gene mutation that acts in a dominant fashion. a/ a 40 year old man was just diagnosed with Huntington disorder. What could […]

1.Compare the embryos of chickens, humans and fish, and describe in detail how pharyngeal arches show a shared evolutionary past?.2.Explain how reproductive barriers result in the development of different species..3.Explain what is meant by the statement, evolution does not have a goal..4.Explain why you would or would not expect evolution […]