How much time do we have left to live on earth when all trees are cut down? A mature leafy tree produces as much oxygen in a season as 10 people inhale in a year. How bad would be the oxygen loss? Would we all die?

List two modern organisms that have pentameral symmetry

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.

Blank is a rock with a find dark texture that makes up the oceanic crust