Biology, 04.07.2019 23:30 joThompson
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
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Biology, 22.06.2019 10:30
Which of these is a provisioning service people get from the ocean
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Biology, 22.06.2019 14:30
The table above shows five different types of chromosomal abnormalities that can occur during meiosis. they result in either an individual having too many or too few chromosomes in their genome. what is the most likely cause of these chromosomal abnormalities?
Answers: 1
In 2000, bob harmon discovered the best-preserved tyrannosaurus rex skeleton ever found. the fossili...
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