Grantia Quiz & Flashcards

Study Notes

Grantia Characteristics

Eukaryotic organism with a multicellular structure.
Heterotrophic, obtaining nutrients from organic matter.

Grantia Classification

Classified under Domain: Eukarya and Kingdom: Animalia.
Subkingdom: Parazoa, indicating a lack of true tissues and organs.
Phylum: Porifera; commonly known as sponges.

Grantia Habitat

Found along the coastline of the North Atlantic.
Commonly inhabits intertidal regions.

Grantia Energy/Food Source

Features a spongocoel, an internal cavity lined with flagellated cells.
Flagella beat to draw in water, fine organic particles, and microorganisms through the body wall's tiny pores.
Food particles are captured in mucilaginous material and absorbed by cells for digestion.
Waste and excess water exit the spongocoel through the osculum at the sponge's top, a process known as filter feeding.

Grantia Type of Skeleton

Comprised of loose aggregations of various cell types and fibrous proteins, notably spongin.
Contains hard spicules made of calcium carbonate or silica for structural support.

Grantia Motility

Primarily sessile, with limited movement in larvae and sperm.

Grantia Adaptations

Flagellated cells enhance water flow into the spongocoel, facilitating nutrient acquisition.
Stalk structure anchors the sponge to prevent drifting.
Presence of spicules serves as a physical deterrent against predators.

Grantia Reproduction

Hermaphroditic, possessing both male and female reproductive structures.
Sexual reproduction involves releasing sperm into seawater, fertilizing eggs within other sponges.
Zygote develops into an embryo that transforms into a flagellated larva, which exits through the osculum and eventually settles to form a new colony.
Asexual reproduction occurs via fragmentation; broken pieces can regenerate into new sponges.

Sponge Friends

Associated sponge species include Alpysina and Spongilla.

Osculum

Large opening through which water and waste products are expelled from the spongocoel.

Spongocoel

The internal cavity characterized by flagellated cells.
Functions in drawing water and organic particles into the sponge through ostia (small pores).

Ostium

Small openings in the body wall that facilitate water entry into the spongocoel.

Choanocytes

Specialized flagellated cells crucial for water circulation and feeding.

Filter Feeding Process

Sequence: Water enters through ostium, flows into spongocoel, exits through osculum.

Description

This quiz covers the characteristics, classification, and habitat of Grantia, a sponge belonging to the Phylum Porifera. Explore key concepts related to this organism and its ecological significance in the North Atlantic coastline. Test your knowledge of this fascinating marine life!

Bio 121 - Lab 6: Grantia in Phylum Porifera

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Questions and Answers

Which of the following are characteristics of Grantia? (Select all that apply)

What is the classification of Grantia?

Where is the habitat of Grantia?

How does Grantia obtain food?

What type of skeleton does Grantia have?

Grantia is a motile organism.

What are the adaptations of Grantia?

Describe the reproduction process of Grantia.

Name two friends of sponge.

What is the purpose of the osculum in Grantia?

What is a spongocoel?

What is the function of choanocytes in Grantia?

The filter feeding process in Grantia flows as follows: Water --> outside --> ______ --> spongocoel --> osculum --> out of body.