CH 32

Question 1

Animals

Answer 1

multi cellular, heterotrophic eukaryotes with tissues that develop from membrane layers

Question 2

Nutrition

Answer 2

Animals differ from plants and fungi in terms of their _____

Question 3

True

Answer 3

Plants are autotrophic eukaryotes capable of photosynthesis

Question 4

enzymes

Answer 4

Animals ingest living/non-living matter then use ____ to digest

Question 5

True

Answer 5

animals have no cell walls

Question 6

collagen

Answer 6

most abundant protein - NOT found in plants or fungi

Question 7

Tissues

Answer 7

groups of smaller cells that act as one functional unit

Question 8

muscle and nerve cells

Answer 8

central to the animal lifestyle

Question 9

sexually; diploid

Answer 9

most animals reproduce ______ and the _____ stage usually dominates the life cycle

Question 10

Haploid stage

Answer 10

sperm and egg cells are produced directly by meiotic division forming a diploid zygote

Question 11

cleavage

Answer 11

zygote undergoes _____ - a succession of mitotic cell divisions without growth between the divisions

Question 12

blastula

Answer 12

formation of a multi cellular stage - in many animals it takes the form of a hollow ball

Question 13

adults; larval

Answer 13

Some animals develop directly into _____, but in life cycles of most animals there is a ____ stage

Question 14

larva

Answer 14

sexually immature form of an animal that is morphologically distinct form the adult - usually eats different food and requires a different environment

Question 15

metamorphosis

Answer 15

the developmental transformation that turns an animal into a juvenile that resembles the adult but is NOT yet sexually mature

Question 16

Homeoboxes

Answer 16

sets of DNA sequences

Question 17

hox genes

Answer 17

regulate the formation of anterior and posterior axis, as well as other aspects of develoment

Question 18

True

Answer 18

sponges don’t have hox genes - they have other homeoboxes that influence their shape

Question 19

Choanoflagellets

Answer 19

closest living relatives of animals

Question 20

Neoproterozoic Era

Answer 20

1 billion - 542 million years ago - fossils found in this era - first sightings of Ediacaran biota

Question 21

Endiacaran Biota

Answer 21

Soft-bodied, multi cellular eukaryotes - some thought to be molluscs, while others closely resemble porifera and cnidarians