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Based on the text and the photos below, draw a labelled diagram of the life cycle of Obelia geniculata (using Aurelia aurita as a model)

Based on the text and the photos below, draw a labelled diagram of the life cycle of Obelia geniculata (using Aurelia aurita as a model)

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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2-Let us look now at the other species: Obelia geniculata (estimated time 30 min) Based on the text and the photos below, draw a labelled diagram of the life cycle of Obelia geniculata (using Aurelia aurita as a model) Obelia geniculata : life cycle The fixed form of Obelia geniculata is a colony of polyps: the polyps are connected by a common stem structure termed hydrocaulus and the colony can be considered as one single organism. Two types de polyps co-exist: polyps having tentacles with stinging cells for capturing food and for protection called hydrozoïds or gastrozoids and polyps with no tentacles termed gonozoïds. The gonozoïds generate buds developing into medusae that detach from the gonozoids and are free swimming in seawater. These medusae produce male and female gametes (there are males medusae and female medusae). The fertilised egg develops into a larval form called a planula that attaches to a solid surface and generates a new colony (see diagram below): hydrozoïd bud hydrocaulus Planula form -Tentacles Perisacral annuli Medusa buds -Coenosarc Gonopore Gonotheca Blastostyle Hydrocaulus OBELIA-PART OF HYDROID COLONY ©studyandscore.com
Transcribed Image Text:2-Let us look now at the other species: Obelia geniculata (estimated time 30 min) Based on the text and the photos below, draw a labelled diagram of the life cycle of Obelia geniculata (using Aurelia aurita as a model) Obelia geniculata : life cycle The fixed form of Obelia geniculata is a colony of polyps: the polyps are connected by a common stem structure termed hydrocaulus and the colony can be considered as one single organism. Two types de polyps co-exist: polyps having tentacles with stinging cells for capturing food and for protection called hydrozoïds or gastrozoids and polyps with no tentacles termed gonozoïds. The gonozoïds generate buds developing into medusae that detach from the gonozoids and are free swimming in seawater. These medusae produce male and female gametes (there are males medusae and female medusae). The fertilised egg develops into a larval form called a planula that attaches to a solid surface and generates a new colony (see diagram below): hydrozoïd bud hydrocaulus Planula form -Tentacles Perisacral annuli Medusa buds -Coenosarc Gonopore Gonotheca Blastostyle Hydrocaulus OBELIA-PART OF HYDROID COLONY ©studyandscore.com
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