ZOOLAB - ONLINE ACTIVITY 2

Acoelomate

What type of body cavity do Platyhelminthes possess?

Pseudocoelomate

Nemathelminthes are characterized by which type of body cavity?

Cestoda

Which class of Platyhelminthes is known for being highly specialized endoparasites of vertebrate digestive systems, lacking a mouth and digestive tract?

Opisthaptor

Which structure is responsible for attachment in Monogenea, a class of Platyhelminthes?

Complex life cycle

Which evolutionary innovation is a characteristic of parasitic flatworms (Platyhelminthes) that allows for effective host-to-host transmission?

Complete digestive system

Which of the following is a distinguishing feature of Nemathelminthes as compared to Platyhelminthes?

Flame cell

The excretory system of Platyhelminthes consists of specialized cells known as:

Simple diffusion

What is the primary method of respiration in both Platyhelminthes and Nemathelminthes?

Trichinella spiralis

Which of the following parasitic nematodes is responsible for causing trichinosis in humans?

Sexual dimorphism

Males and females have distinct morphological differences and is exhibited by Nematodes

Attachment during feeding

The anterior sucker of medicinal leeches (Class Hirudinea) is primarily involved in:

Movement and gas exchange

What is the main function of tube feet in echinoderms?

Holothuroidea

Which class of echinoderms is known for their ability to expel part of their internal organs as a defense mechanism?

Setae

Found in annelids, primary function is for locomotion and anchorage

Oligochaeta

Which class of annelids lacks parapodia and has a well-developed clitellum?

Choanocytes

Unique characteristic of Porifera

Choanocytes

Cell type in Porifera is responsible for generating water currents

It facilitates higher filtration rates of water and food particles.

In complex sponges, what is the role of the extensively branched canal system?

Radial symmetry

Symmetry typically exhibited by cnidarians

Gastrovascular cavity

Found in Cnidarians, it aids in digestion, gas exchange, and excretion.

Ascon

Which sponge body form is considered the simplest and least common?

By filtering large volumes of water daily.

How do sponges contribute to reducing water turbidity in coastal areas?

Mesenchyme cells

Cells responsible for secreting skeletal elements in Porifera

Gemmules

Reproductive method in sponges that can lead to the development of a new sponge under harsh environmental conditions

Nematocyst

The stinging structure inside the cnidocyte

Cephalization

Most commonly observed in bilaterally symmetrical animals, where the body is divided into two mirror-image halves.

Mollusca

Soft-bodied animals with head-foot and a visceral mass portion are members of Phylum ____

Sea urchins

Mostly asymmetrical during their larval stage but soon develop radial symmetry during adult stage of life

Ostia

Its presences, lined by porocytes, is a unique feature in animals from Phylum Porifera

Hermaphrodites

Monoecious animals

Earthworm

Lumbricus terrestris, is an example of monoecious animal

Phylum Mollusca

Classify the following member of Kingdom Animalia as to which animal phylum it belong.

Phylum Arthropoda

Classify the following member of Kingdom Animalia as to which animal phylum it belong.

Phylum Annelida

Classify the following member of Kingdom Animalia as to which animal phylum it belong.

Phylum Echinodermata

Classify the following member of Kingdom Animalia as to which animal phylum it belong.

Phylum Echinodermata

Classify the following member of Kingdom Animalia as to which animal phylum it belong.

Phylum Cnidaria

Classify the following member of Kingdom Animalia as to which animal phylum it belong.

Phylum Platyhelminthes

Classify the following member of Kingdom Animalia as to which animal phylum it belong.

Phylum Nematoda

Classify the following member of Kingdom Animalia as to which animal phylum it belong.

Phylum Mollusca

Classify the following member of Kingdom Animalia as to which animal phylum it belong.

Phylum Mollusca

Classify the following member of Kingdom Animalia as to which animal phylum it belong.

Phylum Arthropoda

Classify the following member of Kingdom Animalia as to which animal phylum it belong.

Phylum Chordata

Classify the following member of Kingdom Animalia as to which animal phylum it belong.

Phylum Chordata

Classify the following member of Kingdom Animalia as to which animal phylum it belong.

Phylum Arthropoda

Classify the following member of Kingdom Animalia as to which animal phylum it belong.