The Ptolemaic model of the solar system was useless for predicting planetary positions.
Indicate whether the statement is true or false
Question 2
What was the Cambrian explosion?
A) the impact of the meteor that led to mass extinction of the dinosaurs
B) the initial spark of lightning that created the first life-form from amino acids
C) the eruption of the volcano known as Cambria on the ancient supercontinent of Pangaea
D) a dramatic diversification of life that began about 540 million years ago
E) the largest mass extinction in Earth's history
A molecular model showing chromosome territories in the cell nucleus of humans
Top down view of Olympus Mons, the highest known mountain in the solar system
Endocrine system.
Structures of the respiratory system.
Female Reproductive System "الجهاز التناسلي للأنثى"
The orange ball is a model of an HPV16 virus