Animals

Describe the characteristics all animals have in common

Monotremes

marsupial

eutherian

A graduate student finds an organism in a pond and thinks it is a freshwater sponge. A postdoctoral student thinks it looks more like an aquatic fungus. How can they decide whether it is an animal or a fungus?

Which of the following is (are) unique to animals?

Both animals and fungi are heterotrophic. What distinguishes animal heterotrophy from fungal heterotrophy is that most animals derive their nutrition by _____.

What do animals ranging from corals to monkeys have in common?

Which of the following is radially symmetrical?

Which of the following is NOT a characteristic of all animals?

An important trend in animal evolution was cephalization. An animal is said to show cephalization when it _____.

Which of the following animals does NOT have a body cavity?

During embryological development, the anus forms before the mouth in _____.

While looking at some seawater through your microscope, you spot the egg of an unknown animal. Which of the following tests could you use to determine whether the developing organism is a protostome or a deuterostome? See whether the embryo _____.

Which of the following is a feature of the tube-within-a-tube body plan in most animal phyla?

What was an early selective advantage of a coelom in animals? A coelom _____.

An organism that exhibits cephalization probably also _____.

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

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

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

Select the correct statement(s) describing nematodes.

Which of the following is a characteristic of cnidarians?

In terms of food capture, which sponge cell is most similar to the cnidocyte of a cnidarian?

Which of the following is characteristic of the phylum Platyhelminthes?

Members of the phylum Mollusca _____.

Which of the following is true of annelids?

A marine biologist dredges up a small animal from the bottom of the ocean. It is uniformly segmented, with short, stiff appendages and soft, flexible skin. It has a complete digestive system and a closed circulatory system, plus multiple true coeloms. Based on this, you determine that the animal must be a(n) _____.

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?

Against which structure do the circular and longitudinal muscles of annelids work?

While sampling marine plankton in a lab, a student encounters large numbers of fertilized eggs. The student rears some of the eggs in the laboratory for further study and finds that the blastopore becomes the mouth. The embryo develops into a trochophore larva and eventually has a true coelom. These eggs probably belonged to a(n) _____.

Which characteristic is shared by cnidarians and flatworms?

Nematodes and arthropods both _____.

All arthropods _____.

In a tide pool, a student encounters an organism with a hard outer covering that contains much calcium carbonate, an open circulatory system, and gills. The organism could potentially be a crab, a shrimp, a barnacle, or a bivalve. The presence of which of the following structures would allow for the most certain identification of the organism?

Which of the following statements about deuterostomes is true?

Chordates are defined by the presence of four morphological traits:

Which structure can be used for feeding and gas exchange?