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dimulka [17.4K]
2 years ago
12

What is the columbian exchange?

Biology
1 answer:
tia_tia [17]2 years ago
7 0

Answer:

The travel between the Old and the New World was a huge environmental turning point, called the Columbian Exchange. It was important because it resulted in the mixing of people, deadly diseases that devastated the Native American population, crops, animals, goods, and trade flows.

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5 0
3 years ago
Which of the following statements about cardiac muscle is true? a. Cardiac muscle is like smooth muscle, because smooth muscle h
Aleonysh [2.5K]

Answer:

c. Cardiac muscle contains bands like skeletal muscle, but its contractions are involuntary like smooth muscle.

Explanation:

In Human anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.

Cardiac muscle is also referred to as myocardium and it's one of the three (3) muscles found only in the heart of vertebrates, the other two (2) being smooth muscle tissue and skeletal muscle tissue.

Cardiac muscle contains bands like skeletal muscle referred to as sarcomeres (contractile units), but its contractions are involuntary like smooth muscle and it's typically being regulated by the sinoatrial node of the heart.

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2 years ago
Proteins that are part of a lipoprotein complex are called
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3 years ago
HELP! ANSWER IF YOU KNOW!!
Zarrin [17]

A is the correct answer

8 0
3 years ago
BRAINLIEST!! Are frogs reptiles or amphibians.
Talja [164]

Answer:

amphibians because it is a cold blooded vertebrate and has aquatic gill breathing larvea

Explanation:

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