![]() The breeding season spans a few months, starting in February or March, and the litter size is typically between three and six. It eats mainly plant seeds and makes small burrows in soil close to or under rocks to evade owls, its main predator. Description įound mainly in rocky outcrops in the deserts of the southwestern United States and Mexico, the rock pocket mouse is medium-sized (length ~18 cm, weight ~12–18g) and nocturnal. It is sometimes grouped in the genus Perognathus. The trait is inherited (passed from parents to offspring).The rock pocket mouse ( Chaetodipus intermedius) is one of 19 species of pocket mice in the genus Chaetodipus. Variations can be physical features, behavior, bodily functions, or resistance to disease. Individuals in a population differ in some trait. Use what you have learned in the activity and the film we watched on rock pocket mice. **Other Animals that Model Natural Selection - For discussion in ClassĮvolution by Natural Selection - VIDA Chart - In the evidence section, write a list of ways in which the rock pocket mouse illustrates the idea posed in the description. Hint: those features might help them do other things. Suggest a reason for traits that don’t help an animal survive. Sometimes animals have traits that don’t seem to make sense, like the long tail feathers of a peacock. ![]() ![]() How do predator species in the desert survive? What adaptations do they have to make them good hunters?ĥ. Predators must be able to obtain food and overcome the defenses of prey. What are other types of defenses that prey species might use?Ĥ. Animals develop many types of defenses to avoid being eaten. What happens to organisms that have adaptations that no longer work for their environment?ģ. Based on this hypothesis, where do you think more darker skinned people lived? Suggest a reason why light skin may be an advantage for people living in other regions.Ģ. One hypothesis is that dark skin protected humans from intense UV radiation (sunlight). Human skin color also comes in different shades. Consider the dark and light colored rock pocket mice. How did you revise your sequence from your initial idea? Explain how you decided on the sequence.ġ. Once you are satisfied with the order, complete the table.Ĩ. You may change your order from your original idea. Now that you have watched the video, go back to your set of cards and arrange them in the order you think they happened, starting with the oldest. Genetics revealed what surprising fact about mice in different locations?ħ. Dark pocket mice are found in locations that have dark substrate.
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