BIOL 111 : Lab 6 - Phylum Annelida.docx

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BIOL 111 Full Course Notes

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Phylum contains segmented worms: earthworms, tubeworms, leeches. Bodies are composed of many essentially similar segments. Daytime, earthworms remain below the surface to avoid drying out. Nighttime, earthworms come to the surface to collect plant debris for food and to mate. Covered in a thin transparent cuticle, secreted by the epidermis: protects the animal from desiccation, glandular cells of the epidermis secrete mucus, which also adds in protection, locomotion and respiration. Anterior end is more cylindrical and thicker than the posterior end: the clitellum: thickened band around the middle of the earthworm that is located closer to the anterior end. The ventral surface of the earthworm is light and flatter than the dorsal surface. The anterior end should elicit a stronger response because of the large concentration of neurons located there. The majority of neurons, including sensory cells, are located in the anterior end.

Related Questions

List two or three features of an earthworm cross section thatdistinguish the dorsal and ventral surface.

Now that you have examined the unifying characteristics ofannelids, list 3 or 4 characteristics they share with flatworms andnematodes as the close ancestors.

Are any sensory organs evident in Ascaris? Why would this beadaptive?

rosewhale311

Biology 103

Chapter 15 Animals

1.Phylum Mollusca includes animals such as ___________, _____________, and ________________. They have a coelom. Their body consists of three parts _______________, ____________________, and _______________. Their shells are produced by _________________ .

2.Phylum Annelida includes animals such as ____________________, __________________, and ___________________. They have a coelom. ___________________ is a special segment of the earthworm that participates in reproduction.

3.Phylum Echinodermata includes animals such as ___________________, __________________, and ___________________. They have _____________________________________ system that provides hydrostatic power for locomotion.

4.Animals of Phylum Chordata all have ______________________, _________________________, _______________________, and ___________________________.

5._____________________ and ______________________ are the invertebrates in Phylum Chodata.

6.Fish includes cartilaginous fish and bony fish. Bony fish includes ray-finned fish and lobe-finned fish. Lobe-finned fish is considered ancestral to ____________________.

7.Birds and reptiles lay ______________ eggs to protect the developing embryo on dry land.

8.Birds and mammals can maintain their body temperature, they are __________________. Mammals that lay hard-shelled eggs such as _________________ are called ________________________; Mammals that have pouches such as _____________________ are called ___________________; Mammals that have placenta for fetal development are called _______________________. We belong to the Order _______________.

17.

Which of the following is NOT a characteristic of mammals?

have hair or fur

are warm-blooded (endotherms)

have an exoskeleton

possess mammary glands

18.

Which of the following is not a major kingdom of life?

Animals

Green algae

Plants

Fungus

19.

Which of the following is not a major phylum in the animal kingdom?

Angiosperms

Arthropods

Annelids (e.g. earthworms)

Chordata

20.

Humans are most closely related to which of the following?

Chimpanzee

Orangutans

New world monkeys

Tarsiers

21.

Who independently proposed the idea of natural selection and evolution at the same time as Darwin?

		Richard Dawkins
		Alfred Russell Wallace
		Peter and Rosemary Grant
		Jean-Baptiste Lamarck

BIOL 111 : Lab 6 - Phylum Annelida.docx

BIOL 111 Full Course Notes

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