Lab 4 - Ascaris

Question 1

Means the inability to generate body heat internally

Answer 1

Ectotherms

Question 2

Asexual reproduction where more females are produced from unfertilized diploid eggs

Answer 2

Parthenogenesis

Question 3

Permits food to pass through the body in one direction only

Answer 3

Complete digestive tract

Question 4

Provides space for the development of internal organs

Answer 4

Body Cavity; Coelom/Psuedocoelom

Question 5

Body cavity also serves as an enclosed, pressurized compartment of fluid that can act as an _______

Answer 5

Hydrostatic Skeleton

Question 6

Separate sexes

Answer 6

Dioescious

Question 7

A pharyngeal apparatus

Answer 7

Mastax

Question 8

Cilated Crown

Answer 8

Corona

Question 9

What two physical characteristics separate Rotifers from other invertebrates?

Answer 9

A Mastax & Corona

Question 10

What body part partakes in the ingestion of food?

Answer 10

Mouth

Question 11

What body part pumps food through the mouth and into the intestines?

Answer 11

Pharynx

Question 12

Ribbon-like digestive tract where the absorption of nutrients occurs

Answer 12

Intestine

Question 13

The body part that partakes in the elimination of indigestible food wastes

Answer 13

Anus

Question 14

Longitudinal canals that function as the excretory system of the roundworm, releasing nitrogenous wastes in the form of ammonia and urea

Answer 14

Lateral Lines

Question 15

Body cavity lined on the inside by a layer of gastrodermis and on the outside by a layer of mesoderm

Answer 15

Psuedocoelom

Question 16

Produces sperm

Answer 16

Testis (male)

Question 17

Stores mature sperm and transports them to seminal vesicle

Answer 17

Vas deferens (male)

Question 18

Enlarged tube representing terminal portion of male reproductive tract, which transports mature sperm out of the nematode

Answer 18

Seminal vesicle (male)

Question 19

Point of entry for sperm and opening through which fertilized eggs are released from the body

Answer 19

Genital pore (female)

Question 20

Terminal portion of female reproductive tract, which receives sperm from males and directs eggs through genital pore

Answer 20

Vagina (female)

Question 21

Site where developing eggs mature before being released

Answer 21

Branched uterus (female)

Question 22

Repository for eggs produced in ovary until fertilization

Answer 22

Oviduct (female)

Question 23

Produces eggs

Answer 23

Ovary (female)

Question 24

Chemoreceptors that detect dissolved chemicals in the water

Answer 24

Auricles