Figure 21-1 ​

question 30

Short Answer

Figure 21-1
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During the____________, there was an explosive radiation of birds, which acquired adaptations for different habitats.

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Definitions:

Glycerin

A simple polyol compound often used in pharmaceutical formulations, foods, and personal care products for its moisturizing and emollient properties.

Skeletal Muscle Fibers

Long, cylindrical cells that make up skeletal muscles, responsible for voluntary body movements.

A Band

The dark area in the sarcomere of a muscle fiber, consisting of thick myosin filaments alongside partially overlapping thin actin filaments.

Myofibril

A basic rod-like unit of a muscle cell, which is essential in the process of muscle contraction and made up of sarcomeres.