BIOL 111 Lecture Notes - Hectocotylus, Ink Sac, Dendrite

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5 Apr 2012

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BIOL 111 Full Course Notes

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High diversity: morphology, modes of nutrition, reproduction. Diversity: polyplacophore: many plates series of places over lapping, not as hard as snail shells. Oldest: burgess shale (520-560 million years old. Gills located in mantle gills: bicalvia: two valves. Reduced of head some have vestigial eyes or brain. Enlargement of foot: used to burrow through the ground and anchorage. Siphons: in current/out current: filter feeders, pulls out small nutrient. Vissel thread associated with foot (secreted by foot) If under sedement can extend siphon up to filter water. Lined with eyes: can detect motion and light, fly through: gastropoda: the water. Most diverse within mollusca (terrestrial marine, fresh water, deep ocean, in trees) Can be shelled (snails), shelless (slugs, nudibranchs) Dioecious or hemaphradidic but can only produce sperm of eggs at one time. Mouth and anus are close each other. Torsion: body/shell orientation spin left of right: elongation of shell occurs.

Related Questions

QUESTION 19

Among all protostomes, which morphological trait is most varied?

		type of symmetry
		type of body cavity
		number of embryonic tissues
		type of development

1 points

QUESTION 20

Nematodes are acoelomate animals.

True

False

1 points

QUESTION 21

The first genetic material on Earth was probably __________.

		DNA produced by reverse transcription
		DNA molecules whose information was transcribed to RNA
		protobionts
		self-replicating RNA molecules

1 points

QUESTION 22

Free point. Mark "true"

True

False

1 points

QUESTION 23

Which of the following is a characteristic of a flagellate?

		The use of pseudopods as feeding structures.
		They are often multinucleate.
		They can exchange genetic material with other ciliates by the process of mitosis.
		Most live as solitary autotrophs in fresh water.

1 points

QUESTION 24

The chelicerates have 2 pair of antennae.

True

False

1 points

QUESTION 25

Nematoes and arthropods both _________________.

		develop an anis from the blastopore formed during gastrulation
		are suspension feeders
		grow by shedding their exoskeleton
		have ciliated larva

1 points

QUESTION 26

If a lung were to be found in a mollusc, where would it be located?

		incurrent siphon
		mantle cavity
		visceral mass
		excurrent siphon

1 points

QUESTION 27

True segmentation (metamerism) evolved 3 seperate times.

True

False

1 points

QUESTION 28

The first coelomate animals are the _______________________________.

		Nematoda
		Platyhelminthes
		Mollusca
		Arthropoda

1 points

QUESTION 29

Several scientific laboratories across the globe are involved in research concerning the origin of life on Earth. Which of these questions is currently the most problematic and would have the greatest impact on our understanding if we were able to answer it?

		How can amino acids, simple sugars, and nucleotides be synthesized abiotically?
		How did RNA sequences come to carry the code for amino acid sequences?
		How could polymers involving lipids and/or proteins form membranes in aqueous environments?
		How can RNA molecules act as templates for the synthesis of complementary RNA molecules?

1 points

QUESTION 30

The greatest number of endemic species is expected in environments that are _____.

		easily reached and ecologically diverse
		isolated and show little ecological diversity
		isolated and ecologically diverse
		easily reached and show little ecological diversity

1 points

QUESTION 31

A population of organisms will not evolve if _____.

		all individual variation is due only to environmental factors
		the environment is changing at a relatively slow rate
		the population size is large
		the population lives in a habitat without competing species present

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 _______________.

An organism that is cephalized is probably ___________________.

		bilaterally symmetrical
		is segmented
		is diploblastic
		has a coelom

1 points

QUESTION 33

Cotton-topped tamarins are small primates with tufts of long white hair on their heads. While studying these creatures, you notice that males with longer hair get more opportunities to mate and father more offspring. To test the hypothesis that having longer hair is adaptive in these males, you should _____.

		test whether other traits in these males are also adaptive
		look for evidence of hair in ancestors of tamarins
		determine if hair length is heritable
		test whether males with shaved heads are still able to mate

1 points

QUESTION 34

Which of these is not an animal?

		ctenophore
		poiferan
		choanoflagellate
		cnidaria

1 points

QUESTION 35

What would be the best anatomical feature to look for to distinguish a gastropod from a chiton?

		presence of muscular foot
		presence of a radula
		production of eggs
		number of shell plates

1 points

QUESTION 36

If radial cleavae occurs during development, the animal will be a protostome.

True

False

1 points

QUESTION 37

The "heart" of arthopods is located ______________.

		ventrally
		centrally
		dorsally
		sagitally

1 points

QUESTION 38

Which structure do bivalves use for feeding?

		radula
		ctenidia (gills)
		beak
		foot

1 points

QUESTION 39

Claytonia virginica is a woodland spring herb with flowers that vary from white to pale pink to bright pink. Slugs prefer to eat pink-flowering over white-flowering plants (due to chemical differences between the two), and plants experiencing severe herbivory are more likely to die. The bees that pollinate this plant also prefer pink to white flowers, so that Claytonia
with pink flowers have greater relative fruit set than Claytonia with white flowers. A researcher observes that the percentage of different flower colors remains stable in the study population from year to year. Given no other information, if the researcher removes all slugs from the study population, what do you expect to happen to the distribution of flower colors in the population over time? 22.2

		The percentage of pink flowers should increase over time.
		The percentage of white flowers should increase over time.
		The distribution of flower colors should not change.
		The distribution of flower colors should randomly fluctuate over time.

1 points

QUESTION 40

The water vascular system of echinoderms _____________.

		functions as a circulatory system that distributes nutrients to body cells
		function in locomotion and feeding
		is bilateral in organization, even though the adult animal is not blaterally symmetrical
		is analogous to the gastrovascular cavity of flatworms

1 points

QUESTION 41

In Phylum Mollusca, the fluid of the open circulatory system is called hemolymph.

True

False

1 points

QUESTION 42

You find what you believe is a new species of animal. Which of the following characteristics would enable you to argue that it is more closely related to a flatworm than it is to a roundworm?

		It is a suspension feeder. It is a suspension feeder.
		It has no coelom.
		It is shaped like a worm.
		It has a mouth and an anus.

1 points

QUESTION 43

You observe that a mystery organism in a pond never comes up to the pond's surface. If you are able to catch one of these organisms, bring it to the lab and dissect it, you should find ______________.

		gills
		spiracle
		trachea
		book lungs

1 points

BIOL 111 Lecture Notes - Hectocotylus, Ink Sac, Dendrite

BIOL 111 Full Course Notes

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