Tissues, Organs & Evolutionary Trends — NEET Biology
📚 Practice ConceptFor example, our heart consists of all the four types of tissues, i.e., epithelial, connective, muscular and neural. We also notice, after some careful study that the complexity in organ and organ systems displays certain discernable trend. This discernable trend is called evolutionary trend (You will study the details in class XII). In this chapter, you are being introduced to morphology and anatomy of frog. Morphology refers to study of form or externally visible features. In the case of plants or microbes, the term morphology precisely means only this. In case of animals this refers to the external appearance of the organs or parts of the body. The word anatomy conventionally is used for the study of morphology of internal organs in the animals. You will learn the morphology and anatomy of frog representing vertebrates.
Which of the following statements are NOT correct regarding the structural organisation in animals? S1: Morphology in animals solely refers to the study of the internal arrangement of organs. S2: Anatomy is the conventional term used for the study of the external appearance of the body or its parts in animals. S3: The complexity in organ and organ systems across different animal groups does not show a discernable evolutionary trend. S4: A tissue is defined as a group of dissimilar cells that perform various unrelated functions in the body. S5: All complex animals are composed of only four basic types of tissues which are organised into organs and organ systems.
View solution & NCERT explanation
Correct answer: B — S1, S2, S3 and S4 only
The question asks to identify the incorrect statements regarding structural organisation in animals. S1: Morphology refers to the study of form or externally visible features, including the external appearance of organs or parts of the body in animals. Therefore, stating it solely refers to internal arrangement is incorrect. S2: Anatomy is conventionally used for the study of the morphology of internal organs in animals, not the external appearance. So, this statement is incorrect. S3: The NCERT states that the complexity in organ and organ systems displays a certain discernable evolutionary trend. Therefore, stating it does not show such a trend is incorrect. S4: A tissue is defined as a group of *similar* cells along with intercellular substances that perform a *specific* function, not dissimilar cells performing unrelated functions. Thus, this statement is incorrect. S5: All complex animals do consist of only four basic types of tissues, which are then organised into organs and organ systems. This statement is correct. Based on the analysis, statements S1, S2, S3, and S4 are NOT correct.
What does NCERT say about For example our heart?
Has this concept appeared in NEET?
Which chapter is this from?
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