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Flashcards in Organismal Biology Deck (51)
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1

animals are eukaryotic, which means they have...

- "true nucleus"
- membrane-bound organelles

2

what does it mean to be heterotrophic?

different feeding

3

what do heterotrophic organisms use as energy and carbon source?

organic materials

4

what are the modes of feeding?

-predators
-herbivores
-filter feeders
-parasites
-detritivores
-omnivores

5

Most animals have an ___ digestion

internal

6

aniamls guts are

internal and continuous with the outside environment and permits internal digestion of food items

7

having multiple cells (multicellularity) means...

cells can become specialized to carry out specific functions and can grow in size

8

animals don't cell walls so how do they support their body?

-hydrostatic skeleton
-exoskeleton
-endoskeleton

9

hydrostatic skeleton

muscles contract against fluid-filled cavity

10

example of an animal with a hydrostatic skeleton

earth worms

11

exoskeleton

non-living covering that does not grow with animal
- ex: moulting animals

12

Endoskeleton

internal support
-vertebrates (living tissue)

13

whats the importance of mobility at some life stage?

-movement reduces competition
- enhances genetic diversity

14

Somatic (body cells) are ....

diploid

15

animals are ???

diplontic

16

fungi are???

haplontic

17

plants are???

alternating

18

what are tissues?

groups of similar cells organized into a functional unit

19

what type of tissues are there?

-muscular
-nervous
-connective
-epithelial

20

what type of connective tissues are there?

-reticular
-adipose
-blood
-bone

21

tissues can function together as ___ to complete more complex tasks

ORGANS

22

how many species of animals are there

more than 1 million!

23

how many are invertebrates?

97%

24

when did animals evolve?

late precambrian

25

who are the closest living relatives to animal origins?

colonial choanoflagellate protists

26

what were the first animals?

marine

27

when did the first animals live?

1.2 bya -700 mya

28

when did the cambrian explosion happen?

542 - 490 mya

29

what happened in the cambrian explosion?

- rapid diversification
- many new phyla were formed
- burgess shale

30

animals are...

monophyletic
- Even though most of their charactersitics are shared with some other groups
- no other groups share all of these characteristics