Scie207 Phase 3 Lab Report

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Submitted by to the category Science and Technology on 08/31/2013 11:25 PM

Table 1: Samples 1–5

Phylum/Division Sample 1: Chrysophyta Sample 2: Annelida Sample 3: Arthropoda Sample 4: Amphibia Sample 5: Aves

Common Feature

Nutrition

How does the organism break down and absorb food? Autotrophic Heterotrophic: Earthworms eat their way through dirt, so they are detritivores. Heterotrophic: Some are vegetarian, some are carnivorous, and some are decomposers. Heterotrophic: These are usually vegetarian as tadpoles and carnivores as adults. Heterotrophic

Circulatory System (Transport)

How does the organism get what it needs to cells (open, closed, diffusion only)? Diffusion only Closed with 5 aortic arches (hearts) Open circulatory system with a heart pumping hemolymph

Closed with 3-chambered heart

Closed with 4-chambered heart

Respiratory System

How does the organism get oxygen and release carbon dioxide? Diffusion only Diffusion through skin

Diffusion through tracheal tubes Diffusion through gills as a tadpole and through lungs and skin (especially) as adults Diffusion through the lungs

Reproductive System

Does the organism use asexual or sexual reproduction (eggs, seeds, spores, placenta, type of fertilization)? Asexual Hermaphrodites: One body has both sexes Sexual: Has special organ called clitellum that moves from the front of the worm to the rear and then falls off, containing the eggs Sexual: Mostly internal fertilization Sexual: Mostly external fertilization; must be in water or very moist area

Sexual: Eggs; internal

Excretory System

How does the organism get rid of wastes and maintain an ionic balance of fluids? Diffusion Nephridia in each segment; solid waste exits through the anus Malpighian tubules Kidneys, intestines, anus Kidneys, intestines, anus

Growth and Development

Does the organism go through metamorphosis, develop in an egg or uterus, or grow from seeds? Start as small cells; grow bigger until division Start out as fertilized eggs, hatch into little worms that continue to grow, and...

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