I am pretty sure the answer is D (combination)
Answer:
pacemaker cells.
Explanation:
Cardiac muscle tissue works to keep your heart pumping through involuntary movements. This is one feature that differentiates it from skeletal muscle tissue, which you can control. It does this through specialized cells called pacemaker cells.
Second-degree burn is the type of burn represented by the formation of the blisters.
Second-degree burn is a burn that affects the epidermis and the superficial part of the dermis layer (skin). Second-degree burn may be caused by sunburn, chemicals, scald injuries, flames or electricity. The burn site may appear blistered, red, wet and shiny, and may be swollen and painful.
The substance is the chemical food source for the soybean plants is glucose. A soybean plant uses cellular respiration to generate usable chemical energy, released within the cell as molecules of <span>carbon dioxide.
</span>
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
