Overview of Animals Practice Problems

_______are the simplest of animals whereas the ____are the most complex among animal kingdom.

Organisms that cannot prepare organic food and depend on plants directly or indirectly for food are called heterotrophs. What is the important function of heterotrophs like fungi in the ecosystem?

The fossils of various organisms found in Ediacaran Hills in Southern Australia are made of different body plans. One of them is the Spriggina which displayed the first _________ type of body plan.

The term "tube within a tube" is used for roundworms and annelids  because:

The similarity of forearm bone structures among humans and cats is an example of:

The origin of bilaterian animals is one of the significant events of the

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

It is a group of organisms that is composed of a common ancestor along with all its lineal descendants. 

What significant evolutionary event happened during the Cambrian explosion? 

Which of the following is a characteristic of sponges that is not found in other animals?

Which of the following is true about gastrulation? 

All of the following are triploblastic animals except:

Carefully study the matching of column 1 with column 2 and identify the option that correctly describes the X, Y, and Z.

The protostome and deuterostome are discussed below in a number of ways. Identify the option that includes the correct statements about protostomes and deuterostomes. 

P. In protostomes, the first opening in the embryo becomes the mouth. 

Q. In deuterostomes, the first opening in the embryo becomes the anus, and the mouth develops later. 

R. The majority of protostomes are vertebrates. 

S. Deuterostomes contains both invertebrates and vertebrates. 

Pick the option that correctly includes the features of bilaterally symmetrical animals. 

1. They have similar anatomical parts that are mirror images along a midline 

2. They are all triploblastic animals. 

3. Their body has distinct anterior and posterior ends. 

4. They are all acoelomate 

5. Most of the organs and structures in their bodies are paired. 

Most sessile animals have _____ symmetry, whereas the most active or mobile animals have _____ symmetry.