Week 4 Wed.

1. Dentition
Lemurs
a. Native to Madagascar in eastern rainforest
b. teeth optimized for leaf, seed fruit and insect eating. sometimes used for grooming
c. due to slash and burn agriculture lemurs limited to dense tree areas where leave, fruit, seeds and insects are plentiful.
summary: teeth are consistent with diet and lifestyle.

Spider Monkey
a. tropical forests of Central and South America
b. teeth shaped primarily eat fruits, but will also occasionally consume leaves, flowers, and insects
c. currently being hunted for food by local human populations. long tail and agility are useful for climbing trees and obtaining their primary source of food (fruits).
summary: teeth are consistent with diet and lifestyle.

baboon
a. African savanna and tropical rain forest
b. teeth shaped to eat fruits, grasses, seeds, bark, and roots, and meat
c. omnivorous diet called for both incisors to tear meat and bark, and molars to chew.
summary:teeth are consistent with diet and lifestyle.

gibbon
a. tropical and subtropical rainforests of southeast Asia
b. teeth shaped for eating fruit, figs, leaves, twigs, shoots, flowers, bird eggs and insects.
c. omnivorous diet.
summary:teeth are consistent with diet and lifestyle.

chimpanzee
a. Rain forests and wet savannas. Spends equal time on land and in trees
b. teeth mainly used to eat fruits, leaves, buds and blossoms.
c. has learned to use tools and diet consists of more vegetarian foods. canines have shrunk compared to ancestors.
summary: teeth have become flatter to become more efficient at eating fruits and plants.

Analogy/Homology

1.
a. Dolphins and blue whales both have teeth
b. dolphin mainly eat fish while blue whales eat plankton. dolphin teeth are rigid and hard while blue whale teeth are more like bristles. this difference is due to the differences in their diets.
c. protocetus also had teeth
d.

2.
a.Octopi and jellyfish both have tentacles
b.the tentacles of the both are used for aquireing food. however, octopi tentacles are covered with suckers while jellyfish tentacles are not. differences exist because octopi use tentacles and their mode of transportation and they also hunt stronger food. Tentacles are useful for obtaining food.
c.Bacteria, some bacteria have a small "feeler" called a flagella used to sense their surrounding and move.
d.

Secret Message

 GATATTACCAAGTTATATTGAATCAACCGTTGATCGTAACATCGTAGCTA

Not Enough Food

http://www.ucmp.berkeley.edu/history/malthus.html
Thomas Malthus summarizes that populations are limited by the availability of resources. Darwin's idea that for evolution to occur individuals must compete for limited resources and only the most efficient at obtaining those resources will survive to produce offspring. If Darwin had not heard of this idea he may have come to the same conclusion by himself but if he hadn't, Darwin would not be able to explain why species develop in certain ways. Not only the church but the scientific community itself was mostly against Darwin's ideas and caused him to delay the publication of his book because of the social backlash.