Lecture 15

Question 1

Angiosperm

Answer 1

• type of vascular plant that produces flowers

- produces covered seeds

Question 2

Gymnosperm

Answer 2

-produces a seed that lacks a cover

Question 3

Climate when Mammals Diversified

Answer 3

the temperature was a lot warmer and dipped down when monkeys diversified

Question 4

Dating Fossils: Potassium Argon Dating

Answer 4

argon is measured in volcanic rock from decayed potassium

Question 5

Dating Fossils: C-14 Dating

Answer 5

• live animals have the same level of carbon 14 and carbon 12 as the atmosphere
• after the animals die, C14 decays into N14 so age can be determined by how much is left

Question 6

Other Radiometric Dating Methods

Answer 6

1. Thermoluminescence dating
2. Electron Spin Resonance Dating
3. Uranium-Lead Dating

Question 7

Relative Dating Methods

Answer 7

1. Magnetic Reversals

2. Extinct and Distinct Species of Animals

Question 8

Characteristics of Primates

Answer 8

1. adaptations for climbing and locomotion
2. opposable thumbs and grasping tails
3. hind-limb dominated posture
4. relatively short snouts compared to other mammals
5. relatively large brains
6. increased reliance on stereoscopic vision

Question 9

Primates: Nails instead of Claws

Answer 9

-primates generally have five digits usually with nails which can be correlated with small branch foraging

Question 10

Characteristics of Prosiminans

Answer 10

• small brains
• nocturnal
• reflective layer in eyes
• big eyes

Question 11

Characteristics of Tarsiers

Answer 11

• enormous eyes that are as big as their brain
• excellent hearing
• long feet and fingers

Question 12

Characteristics of New World Monkeys

Answer 12

• only monkeys with prehensile tails
• most lack tricolor vision
• most don’t have opposable thumbs
• flat nosed monkeys

Question 13

Characteristics of Old World Monkeys

Answer 13

• no prehensile tails
• grasping hands and feet
• most are not monogamous
• most have considerable sexual dimorphism

Question 14

Why teeth are informative

Answer 14

• reflect dietary specializations

- preserve better than bones

Question 15

Anthropoids

Answer 15

New World monkeys and old world monkeys including apes and humans

Question 16

Hominoids

Answer 16

apes including humans

-includes gibbons, orangutans, gorillas, and chimpanzees

Question 17

Hominins

Answer 17

human lineage after divergence from chimps and bonobos

Question 18

Characteristics of Apes

Answer 18

• relatively long arms
• short legs
• long finger
• short stiff lumber spine
• lack tails