1. Which diagram most accurately shows the arrangement of homologous chromosomes during the first metaphase of meiosis? Please explain why and how does this arrangement determine the law of “equal segregation”? 2. Which diagram most accurately shows the arrangement of homologous chromosomes during the first metaphase of mitosis? Please explain […]

Q1. The oldest rocks on Earth date from about 4.2 billion years ago. What does this propose about the interval between 4.6 billion years ago, while the Earth started to form, and 4.2 billion years ago? Q2. You also measure that half-life of the Winease catalyzed conversion is 10 sec. […]

Case study jack and Diane R., a 25-year-old newlywed couple, reported to the emergency room with abdominal pain and diarrhea of 4 days’ duration. They stated that they initially thought they “picked up a summer stomach flu” because they recently returned from a 5-day camping trip. Jack added, “We were […]

Synaptic vesicles are released at the synaptic cleft in response to action potentials arriving at the nerve terminal Questiona) What processes ensure that vesicles are released only at the synapse,and not elsewhere? b)Give two mechanisms that allow the nerve cell to recover from the effects of the action potentials and […]