Bio II 2nd exam

What are the light-gathering units of the compound eye?

ommatidia

Which part of the horseshoe crab body is used to help the animal right itself if it is turned on its back by waves?

 telson

Which animal is a member of the arthropod group mandibulata?

Crayfish

 Sea urchins and sand dollars belong to the echinoderm class:

 Echinoidea

Which animals are known for their resistance to harsh conditions including desiccation and radiation exposure?

 tardigrades

Which myriapods are venomous predators?

 centipedes

Which is responsible for producing large amounts of digestive enzymes in a sea star?

 pyloric caeca

 Which is the host in which the parasite reproduces sexually (=definitive host) in the liver fluke life cycle?

human

The madreporite:

allows small amounts of sea water to enter or exit the water vascular system.

Many leeches have 3-part jaws that make a Y-shaped cut into their prey.

Many leeches have 3-part jaws that make a Y-shaped cut into their prey.

true

 Monotremes such as the platypus and echidna give birth to underdeveloped young that complete their development in a pouch (marsupium) on the mother's body.

False

 Feathers and fur function to insulate the body.

True

 A placenta is an organ that connects the fetus to the inside wall of the uterus via the umbilical cord, and allows for exchange of substances including oxygen and nutrients.

true

All birds are capable of flight.

False

Tetrapods are thought to have evolved from a lobe-finned fish ancestor.

true

Some snakes lay eggs; others give birth to live young.

True

A flap-like structure called an operculum covers the gills in the bony fishes.

True

 Sea urchins feed using branched tentacles surrounding the mouth.

False

 Leeches and earthworms are clitellates.

True

 Chelicerates include arachnids, horseshoe crabs, and crustaceans

true

. Platyhelminths are hermaphrodites.

True

 Insects have two main body regions, the head and the opisthoma.

False

Male spiders use their pedipalps to transfer masses of sperm to their mates.

True

Annelid excretory structures are called metanephridia.

True