UNIT 2

Question 1

8 Fundamental Properties of Life

Answer 1

1. cellular organization
2. sensitivity
3. growth
4. development
5. reproduction
6. regulation
7. heredity
8. homeostasis

Question 2

Miller-Urey Experiment

Answer 2

Showed that Earth’s early atmosphere had very little oxygen in the atmosphere, small organic molecules started forming (including AA -> proteins)

Question 3

Linnaean Hierarchy

Answer 3

Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species

Question 4

heterotrophy

Answer 4

obtain energy and organic molecules by ingesting organisms

Question 5

multicellularity

Answer 5

many have complex bodies

Question 6

No cell walls

Answer 6

they lack rigid cell walls and are usually flexible

Question 7

active movement

Answer 7

move more rapidly and in more complex ways

Question 8

diversity of form

Answer 8

vary greatly in form, ranging in size from organisms too small to see with the unaided eye to enormous

Question 9

sexual reproduction

Answer 9

most animals reproduce sexually, animal eggs which are nonmobile

Question 10

diversity of habitat

Answer 10

grouped into 35-40 phyla most occur only in the sea but can occur in fresh water or on the land

Question 11

embryonic development

Answer 11

zygote first undergoes a series of mitotic divisions that produces a ball of cells

Question 12

tissues

Answer 12

cells of most animals are organized into structural and functional units called tissues

Question 13

5 Transitions Noted in Animal Evolution

Answer 13

tissues, symmetry, body cavity, patterns of development, segmentation