Biology lab exam

Question 1

What kind of organisms are sponges (proifera)

Answer 1

Sessile (don’t move)

Question 2

Why are some sponges rigid and some soft and flexible?

Answer 2

Because some contain spicules which cause rigidity, also consist of spongen which cause softness.

Question 3

What is the osculum in sponges?

Answer 3

An outlet for water passing through the sponge

Question 4

How do sponges digest food?

Answer 4

filter it through pores in their sponges

Question 5

What are cnidarians known for?

Answer 5

Their stinging cells known as cnidocytes

Question 6

What layer do cnidarians have that replaces the mesoderm?

Answer 6

mesoglea

Question 7

What are the two forms cnidarians take?

Answer 7

Medusa and polyp

Question 8

What is the polyp for of a cnidarian?

Answer 8

sessile

Question 9

What is the medusa form of a cnidarian?

Answer 9

free swimming

Question 10

How do cnidarians digest in medusa form?

Answer 10

By extending their tentacles which surround the mouth

Question 11

What type of body symmetry do polyps and medusa have?

Answer 11

Radially symmetric

Question 12

What kind of digestive system do cnidarians have?

Answer 12

Gastrovascular cavity

Question 13

What are corals?

Answer 13

Colonies of many polyps

Question 14

What is the blastopore in development?

Answer 14

the first opening to develop into the body of an embryo

Question 15

What is a protostome?

Answer 15

mouth to anus

Question 16

What is a deuterostome?

Answer 16

anus to mout

Question 17

What body cavity do platyhelminthes have?

Answer 17

The don’t, they are acelomates

Question 18

What type of symmetry do flatworms have?

Answer 18

bilaterally symmetric

Question 19

How do you describe flatworm locomotion?

Answer 19

Use waves of ciliary action to glide over surfaces

Question 20

What structures do flatworms use for locomotion?

Answer 20

longitudinal, circular, and oblique layers of muscle. Others move along slime trails by the beating of epidermal cilia

Question 21

What is a flatworms digestive system?

Answer 21

incomplete digestive system with a gastrovascular cavity

Question 22

How do tapeworms obtain their food?

Answer 22

Take nutrients from the host

Question 23

How do tapeworms attach to their host?

Answer 23

by means of their anterior scolex, which may have hooks in addition to four suckers

Question 24

What three parts of a mollusca are part of the basic body plan?

Answer 24

mantle, foot, visceral mass

Question 25

What is the mantle of a mollusca?

Answer 25

enclose the mantle cavity, also produces the shell

Question 26

What is the foot of a mollusca?

Answer 26

Used for locomotion

Question 27

What is the visceral mass of mollusca?

Answer 27

contains most of the internal organs

Question 28

What type of body cavity are annelida?

Answer 28

True celomates

Question 29

How do blackworms (annelida) move?

Answer 29

By alternating the contraction and relaxation of circular and longitudinal muscles

Question 30

Are annelida segmented?

Answer 30

yes

Question 31

How do example insects differ form other arthropods?

Answer 31

Have wings, 6 legs, and segmented 3 times

Question 32

What are the 4 major features of chordates that are present during at least part of their life cycle?

Answer 32

1. notochord provides skeletal support 2. dorsal hollow nerve cord 3. pharyngeal gill slits 4. a post anal tail

Question 33

Why was a foil packet of drierite desiccant used?

Answer 33

to absorb excess moisture that may interfere with the sensor

Question 34

How do you calculate respiration rate in crickets?

Answer 34

slope/mass of crickets