Question 1

Echinoderms show enormous diversity in which of the following traits?

Accepted Answer

Echinoderms exhibit a wide variety of body shapes and food habits, adapting to different ecological niches in marine environments.

Question 2

As you are walking along a beach, you find an animal and believe that it belongs to the class Asteroidea. Which of the following characteristics would support your hypothesis that the animal is a sea star and not another type of echinoderm?

Accepted Answer

The answer of As you are walking along a beach,...

Question 3

Which of the following statements is correct with respect to the evolutionary relationship between chordates and invertebrates?

Accepted Answer

Chordates and echinoderms are both part of the Deuterostomia group, indicating they share a more recent common ancestor with each other than with arthropods or other invertebrates. This makes chordates more closely related to echinoderms than to arthropods.

Question 4

Which of the following animal groups is entirely aquatic?

Accepted Answer

Echinodermata, which includes starfish, sea urchins, and sea cucumbers, is entirely aquatic, with all members living in marine environments.

Question 5

The increase in plant species diversity is correlated with which of the following events?

Accepted Answer

The increase in plant species diversity is closely correlated with a massive increase in species diversity of insects. This relationship is largely due to the complex interactions between plants and insects, including pollination, herbivory, and seed dispersal, which have driven the diversification of both groups.

Question 6

Use the following information and figure to answer the question.
Aphids are hemipterans that suck phloem liquid from plants. Ants are often seen collecting the liquid off the posterior end of the aphid and collecting the liquid that is released from the aphid's digestive system. In an effort to understand this interaction, several researchers measure the survival rates of aphid populations when ants were present and when they were excluded. Their results are shown. 
Which of the following conclusions is most consistent with the data?

Accepted Answer

The answer of Use the following information and figure to...

Question 7

Which of the following characteristics is exhibited by the water vascular system of echinoderms?

Accepted Answer

The water vascular system of echinoderms, such as starfish, functions primarily in locomotion and feeding. It is a network of hydraulic canals branching into tube feet that allow the animal to move and capture food.

Question 8

Which of the following structures in insects functions in gas exchange?

Accepted Answer

Spiracles are openings on the surface of some animals, including insects, that lead to respiratory systems, allowing for gas exchange.

Question 9

Use the following information to answer the question.
Nudibranchs, a type of predatory sea slug, can have various extensions on their dorsal surfaces. Rhinophores are paired structures, located close to the head, which bear many chemoreceptors. Dorsal plumules, usually located posteriorly, perform respiratory gas exchange. Cerata usually cover much of the dorsal surface and contain nematocysts at their tips.
The antennae of insects have a function most similar to that of ________.

Accepted Answer

Antennae in insects and rhinophores in nudibranchs both serve primarily as sensory organs, with a focus on chemical detection.

Question 10

Which phylum is characterized by animals that have a segmented body?

Accepted Answer

Arthropoda is characterized by animals that have a segmented body, along with jointed appendages and an exoskeleton made of chitin.

Question 11

In these figures, which two main clades branch from the most recent common ancestor of the eumetazoans?

Accepted Answer

The answer of  
In these figures, which two main...

Question 12

A land snail, a clam, and an octopus all share ________.

Accepted Answer

All three organisms, a land snail, a clam, and an octopus, share a mantle, which is a significant part of their anatomy as mollusks.

Question 13

Which of the following combinations correctly matches a phylum to its description?

Accepted Answer

Echinodermata, which includes starfish and sea urchins, exhibits bilateral symmetry in its larval stage and possesses a unique water vascular system used for locomotion and feeding.

Question 14

Which of the following combinations of phylum and description is incorrect?

Accepted Answer

Porifera, commonly known as sponges, do not have a gastrovascular cavity nor are they coelomates. They have a simple body structure without true tissues and organs, and they rely on a system of pores and channels for water circulation and feeding.

Question 15

The water vascular system of echinoderms ________.

Accepted Answer

The water vascular system of echinoderms, such as starfish and sea urchins, primarily functions in locomotion and feeding. It is a hydraulic system that uses water to operate tube feet which help the animal move and capture food.

Question 16

Soft-shell crab is a prized dish in many ocean-side resorts. Which of the following statements provides the best explanation for the soft shell of the crabs?

Accepted Answer

The soft shell of crabs is due to the fact that they have recently molted, and their new exoskeleton has not yet had time to harden. This is a temporary state that occurs as part of their growth process.

Question 17

Which of the following adaptations led to an explosion in insect evolution?

Accepted Answer

Flight allowed insects to explore new environments, escape predators, and access new food sources, leading to a significant diversification and evolutionary success.

Question 18

In the below figure, assume that the two medusae shown at step 4 were produced by one polyp colony. Review Concept 12.1 and Concept 13.3, and then use your understanding of mitosis and meiosis to select which of the following is true.

Accepted Answer

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Quiz 33: Invertebrates