Which structure in the eye allows light to enter?
a. Sclera
b. Pupil
c. Cornea
d. Iris
e. Retina
b
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What happened in Australia when rabbit hemorrhagic disease virus was released to control the rabbit population?
What will be an ideal response?
Endergonic reactions ____
a. result in products with less energy than the reactants b. require a net input of energy c. occur in the breakdown of glucose d. are used by cells to provide energy for biological reactions e. break down large molecules into smaller molecules
Which of the following represents an early stage in primary succession?
a. pine trees b. moss and lichens on bare rock c. weedy annual plants in an open field
d. climax species in succession e. alder, cottonwood, and willow thickets
Oxpeckers have long been thought to have a mutualistic relationship with cattle in Zimbabwe, whereby the birds remove ticks from the backs of cattle, and the cattle benefit due to the removal of parasitic ticks
The observational experiments of Weeks (2000 ) in Zimbabwe demonstrated that the relationship between oxpeckers and cattle was not mutualistic, but in fact parasitic. What two oxpecker behaviors did Weeks observe?