In 2000, Bob Harmon discovered the best-preserved Tyrannosaurus Rex skeleton ever found. The fossilized dinosaur was sticking out of the wall of a canyon in Montana. Many scientists were eager to study the fossils. Dr. Mary Schweitzer got one of the leg bones to analyze. Dr. Schweitzer's assistant dissolved the bones in acid and discovered that some soft tissue had survived even after 68 million years. The discovery was a shock to the scientific community. No one had ever found such old tissues. Dr. Schweitzer found structures identical to modern red blood cells and blood vessels inside the bone.Which organ system do blood cells and blood vessels belong to?


A.circulatory system

B.nervous system

C.skeletal system

D.respiratory system

Answers

Answer 1
Answer: a, the circulatory system
Answer 2
Answer:

Final answer:

Red blood cells and blood vessels belong to the circulatory system, which is responsible for the transport of nutrients, gases, and waste throughout the body.

Explanation:

In the case of the Tyrannosaurus Rex skeleton found by Bob Harmon and later studied by Dr. Mary Schweitzer, the structures which were found that were identical to modern red blood cells and blood vessels belong to the circulatory system. This system in the body is primarily responsible for the transport of nutrients, gases, and waste throughout the body via the blood, which collectively forms in a network of blood vessels, like veins and arteries, and is pushed through these networks by the heart.

Learn more about circulatory system here:

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Which statement best explains why cells were observed in more detail using a compound microscope than a simple microscope?

Answers

the statement best that explains why cells were observed in more detail using compound microscope than a simple microscope is : compound microscope has greater magnification ability than the simple microscope .

This will allow us to observe the subject with a much smaller size, making it easier for us to observe the detail

hope this helps

Explanation:

A microscope is a tool used to observe small objects in a larger size in order to see the details. The main difference between a compound and a simple microscope is the number of lenses, a compound microscope has two sets of lenses, meaning it has a higher magnification allowing the observation of more details and therefore is more adequate to observe cells.

I hope you find this infromation useful and interesting! Good luck!

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Answer:

Yes

Explanation:

matter is anything that has mass and occupies space so food we eat has mass and it also occupies space somehow

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