Texas TEKS 7.13

7.13 is a TEKS knowledge and skills statement. These are the student expectations under it.

• 7.13.A

  identify and model the main functions of the systems of the human organism, including the circulatory, respiratory, skeletal, muscular, digestive, urinary, repr...

• 7.13.B

  describe the hierarchical organization of cells, tissues, organs, and organ systems within plants and animals

• 7.13.C

  compare the results of asexual and sexual reproduction of plants and animals in relation to the diversity of offspring and the changes in the population over ti...

• 7.13.D

  describe and give examples of how natural and artificial selection change the occurrence of traits in a population over generations.

01

What Students Need to Do

Students identify each major human body system, model its main job, and explain how systems work together. They organize cells, tissues, organs, and organ systems in order. They compare sexual and asexual reproduction, then explain how natural and artificial selection shift traits across generations.

02

What Mastery Looks Like

A student can label a body model, match organs to systems, and trace an event such as running through several interacting systems. They can build a correct biological hierarchy and use offspring or population data to explain diversity and changes in trait frequency.

03

Common Misconceptions

Students often treat body systems as isolated, confuse organs with tissues, or reverse the biological hierarchy. They may think asexual offspring are always perfectly identical or that individual organisms gain traits because they need them. Some also confuse artificial selection with genetic engineering.

04

How to Assess It

Give a four-box exit ticket: connect two systems during a sprint, order four hierarchy examples, compare reproduction types, and explain a trait-frequency graph.

1. 01

   Use organ cards, yarn, and a body outline to build connected system models and explain how oxygen reaches a leg muscle.

2. 02

   Write: How would clone-producing and sexually reproducing lizard populations respond differently to a new disease?

3. 03

   Play a hierarchy relay where teams sort cell, tissue, organ, and system cards, then justify each sequence.

4. 04

   Compare antibiotic resistance data with dog-breeding examples to identify natural versus artificial selection and track trait frequencies across generations.

• K.13

  Organisms and environments. The student knows that organisms resemble their parents and have structures and undergo processes that help them interact and surviv...

• 2.13

  Organisms and environments. The student knows that organisms have structures and undergo processes that help them interact and survive within their environments...

• 3.13

  Organisms and environments. The student knows that organisms undergo similar life processes and have structures that function to help them survive within their ...

• 4.13

  Organisms and environments. The student knows that organisms undergo similar life processes and have structures that function to help them survive within their ...