Flycatcher birds that migrate from Africa to Europe feed their nestlings mostly with moth caterpillars. The data presented show the mean dates of egg laying, hatching, and fledging of flycatcher young, and the 1980 and 2000 peak mass of caterpillars.

The most likely cause for the shift in caterpillar peak mass is

TLS Online TPP Program

#Question id: 21243

#Unit 7. System Physiology – Animal

A 62-year-old Caucasian woman experienced a rapid onset of blurry vision along with loss of central vision. A comprehensive eye exam showed that she had wet age-related macular degeneration. The fovea of the eye

TLS Online TPP Program

#Question id: 21244

#Unit 7. System Physiology – Animal

Which of the following parts of the eye has the greatest concentration of rods?

TLS Online TPP Program

#Question id: 21245

#Unit 7. System Physiology – Animal

Which of the following is not correctly paired?

TLS Online TPP Program

#Question id: 21246

#Unit 7. System Physiology – Animal

The correct sequence of events involved in phototransduction in rods and cones in response to light is:

TLS Online TPP Program

#Question id: 21247

#Unit 7. System Physiology – Animal

A 25-year-old medical student spent a summer volunteering in the sub-Saharan region of Africa. There he noted a high incidence of people reporting difficulty with night vision due to a lack of vitamin A in their diet. Vitamin A is a precursor for the synthesis of

TLS Online TPP Program

#Question id: 21248

#Unit 7. System Physiology – Animal

An 11-year-old male was having difficulty reading the graphs that his teacher was showing at the front of classroom. His teacher recommended he be seen by an ophthalmologist. Not only was he asked to look at a Snellen letter chart for visual acuity but he was also asked to identify numbers in an Ishihara chart. He responded that he merely saw a bunch of dots. Abnormal color vision is 20 times more  common in men than women because most cases are caused by an abnormal