AP Biology Ch 34 Animals Protostomes

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  • 1/11 Questions

    The major insect body parts are

    • Head, cephalothorax, and abdomen.
    • Cephalothorax, midsection, and abdomen.
    • Head, thorax, and abdomen.
    • Head, prothorax, and metathorax.
    • Head, cephalothorax, and genitalia.
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About This Quiz

Protostomes are a clade of animals that undergo protostomy during their embryonic development and their blastopore becomes the mouth. The protostomes, together with the Deuterostomes and the Xenacoelomorpha, make up a major group of animals called the Bilateria. See how much you know about Protostomes by taking up the quiz below.

Animal Biology Quizzes & Trivia

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  • 2. 

    A unique species of snail has been discovered in the Negev Desert. At night, these snails use a toothlike rasping organ in their head to scrape up porous limestone; they then digest the algae that lived in the rock pores. This scraping organ is the

    • Labial palp.

    • Radula.

    • Mantle.

    • Tentacle.

    • Crop.

    Correct Answer
    A. Radula.
    Explanation
    The correct answer is radula. The passage states that the snails use a toothlike rasping organ in their head to scrape up porous limestone and digest the algae. The radula is a specialized feeding organ found in mollusks, including snails, that is used for scraping and rasping food particles. Therefore, the radula is the most suitable organ for the described behavior of the snails.

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  • 3. 

    The most intelligent of the invertebrates is thought to be the

    • Earthworm.

    • Insect.

    • Nudibranch.

    • Octopus.

    • Spider.

    Correct Answer
    A. Octopus.
    Explanation
    The octopus is considered the most intelligent of the invertebrates due to its complex problem-solving abilities, advanced learning capabilities, and impressive memory skills. Octopuses have been observed using tools, exhibiting curiosity and creativity, and even displaying signs of playfulness. They have a highly developed nervous system and can adapt their behavior to different situations, making them highly adaptable and intelligent creatures.

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  • 4. 

    In which way are protostomes and deuterostomes the same?

    • They both have spiral cleavage of the embryo.

    • The coelom develops in the same way in both.

    • The mouth forms first in both, before the anus.

    • They both form a hollow sphere in the embryo that has an indentation called a blastopore.

    • They both have indeterminate fate of the embryonic cells, so that separated cells all have the capacity to become a complete embryo.

    Correct Answer
    A. They both form a hollow sphere in the embryo that has an indentation called a blastopore.
    Explanation
    Protostomes and deuterostomes are similar in that they both form a hollow sphere in the embryo that has an indentation called a blastopore. This blastopore eventually develops into either the mouth or the anus, depending on the organism. This is a key characteristic in the early development of both protostomes and deuterostomes, and it helps to differentiate them from other types of embryos. The other statements provided in the question are not accurate descriptions of the similarities between protostomes and deuterostomes.

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  • 5. 

    Most animal species are in which phylum?

    • Mollusca

    • Arthropoda

    • Chordata

    • Echinodermata

    • Annelida

    Correct Answer
    A. Arthropoda
    Explanation
    Arthropoda is the correct answer because it is the largest phylum in the animal kingdom, comprising over 80% of all known animal species. This phylum includes insects, spiders, crustaceans, and other arthropods. They are characterized by having jointed limbs and a hard exoskeleton. Mollusca, Chordata, Echinodermata, and Annelida are also phyla, but they have fewer species compared to Arthropoda.

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  • 6. 

    Millipedes differ from centipedes because

    • Centipedes generally have fewer legs per segment.

    • The millipede is herbivorous, the centipede is carnivorous.

    • Large centipedes are dangerous to handle but millipedes are safe.

    • All of the above are correct.

    Correct Answer
    A. All of the above are correct.
    Explanation
    Millipedes differ from centipedes in multiple ways. Firstly, centipedes generally have fewer legs per segment compared to millipedes. Additionally, millipedes are herbivorous, while centipedes are carnivorous. Lastly, while large centipedes can be dangerous to handle, millipedes are considered safe. Therefore, all of the above statements are correct in explaining the differences between millipedes and centipedes.

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  • 7. 

    An insect circulatory system is best described as

    • Totally closed like ours, with arteries and veins.

    • Similar to ours with general closed vessels but no distinct arteries and veins.

    • An open system that mostly washes "blood" through the body cavities.

    • Totally absent; each body cell manages on its own to gain food and get rid of wastes.

    Correct Answer
    A. An open system that mostly washes "blood" through the body cavities.
    Explanation
    An insect circulatory system is best described as an open system that mostly washes "blood" through the body cavities. Unlike our closed circulatory system with distinct arteries and veins, insects have a network of small tubes called tracheae that transport oxygen directly to their body tissues. Insects also have a tubular heart that pumps a fluid called hemolymph into the body cavity, where it bathes the organs and tissues. This hemolymph transports nutrients and waste products, but it does not circulate in a closed loop like our blood. Therefore, the correct answer is an open system that mostly washes "blood" through the body cavities.

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  • 8. 

    The chitinous bristles that earthworms use to anchor themselves in the earth and pull themselves along are

    • Aortic arches.

    • Lateral ventricles.

    • Setae.

    • Parapodia.

    • Nephridia.

    Correct Answer
    A. Setae.
    Explanation
    Earthworms use chitinous bristles called setae to anchor themselves in the earth and move along. Setae are located on the ventral side of their body and are used for locomotion. They help the earthworm grip the soil and create traction as it contracts and expands its muscles, allowing it to move forward or backward. The other options listed, such as aortic arches, lateral ventricles, parapodia, and nephridia, are not related to the chitinous bristles used by earthworms for movement and anchoring.

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  • 9. 

    A closed circulatory system is found in

    • Insects.

    • Snails.

    • Clams.

    • Earthworms.

    • Scorpions.

    Correct Answer
    A. Earthworms.
    Explanation
    A closed circulatory system is a type of circulatory system where the blood is contained within vessels and does not directly come into contact with the body tissues. Insects, snails, clams, and scorpions have an open circulatory system, where the blood is not contained within vessels and directly bathes the body tissues. However, earthworms have a closed circulatory system, where the blood is contained within vessels and is circulated throughout the body.

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  • 10. 

    Which of the following is NOT an advantage of having a true coelom?

    • Sperm and eggs can be stored before they are released.

    • The digestive system can coil and provide greater surface area.

    • Muscle contractions against the fluid chambers are absorbed and have no effect.

    • Fluids here can assist respiration and circulation, and accumulate metabolic wastes.

    • Complex organ systems can develop protected from damage and temperature changes.

    Correct Answer
    A. Muscle contractions against the fluid chambers are absorbed and have no effect.
    Explanation
    Having a true coelom provides several advantages, such as the ability to store sperm and eggs before they are released, the coiling of the digestive system to increase surface area, the assistance of fluids in respiration and circulation, and the protection of complex organ systems from damage and temperature changes. However, muscle contractions against the fluid chambers in a true coelom are not absorbed and have no effect, which means they do not contribute to any of the aforementioned advantages.

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  • 11. 

    Which characteristic is NOT found in the class Gastropoda?

    • Anus directly over the head

    • Torsion of the body so that the visceral mass is over the foot

    • Mantle may form gills or functional lungs

    • Carnivores use the radula to drill holes in shells of bivalves

    • Swimming larvae are found in all forms

    Correct Answer
    A. Swimming larvae are found in all forms
    Explanation
    The characteristic "swimming larvae are found in all forms" is not found in the class Gastropoda. This class of mollusks typically does not have swimming larvae.

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  • Mar 22, 2023
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  • Apr 27, 2009
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