When Carrying Out a Controlled Experiment, It Is Important To

question 23

Multiple Choice

When carrying out a controlled experiment, it is important to:

• A)change multiple variables at once to see the full effect of the variables.
• B)subject different groups to different conditions.
• C)change only one variable at a time.
• D)All of these choices are correct.

---

Definitions:

Digestive Tract

A connected series of hollow organs forming a lengthy, winding path from the mouth to the anus, designed for ingesting food, digesting it, absorbing nutrients, and expelling waste.

Lamellae

Concentric, ring-like layers found in bone, making up the structure of compact bone, or in the chloroplasts of plants, where they contain light-absorbing pigments for photosynthesis.

Compact Bone Tissue

A type of bone tissue that is dense and solid, providing structural strength.

Spongy Bone

Also known as cancellous bone, this is a porous type of bone found at the ends of long bones and in the inner layers of other bones, providing structural support and flexibility.