biodiversity: bacteria, protista, animals

Question 1

autotrophic and heterotrophic organisms

Answer 1

auto- plants

heter- anumals

Question 2

protista’s role in evolution of living organisms

Answer 2

gave rise to fungi plant and animal kingdoms

Question 3

division of time

Answer 3

1. the largest blocks of time are eras.
2. Eras are divided into blocks of time called periods
3. some periods are divided into epochs, which can be divided into ages

Question 4

Endothermic: mammals and birds

Answer 4

Body temperatures is regulated by metabolism

Question 5

Ectothermic: most animals

Answer 5

Body temperatures are regulated by the environment

Question 6

Five key characteristics for land life

reptiles

Answer 6

• legs (majority)
• lungs & pulmonary veins
• cutaneous respiration
• partially divided heart
• amphibians must reproduce in water

Question 7

Bony vs. Sharks

Answer 7

sharks: flexible skeleton made of cartilage, even teeth
- gain buoyancy by metabolizing oil in their huge livers, must keep swimming to counteract their denser-than-water bodies

bony:
- a swim bladder,
a gas-filled sac regulates buoyancy
- breathe by a single loop blood circulation: gills exact dissolved oxygen