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?

Which organisms have pharyngeal arches that develop from all three germ layers and go through the same development stages as embryos? 1.bird 2.ladybug 3.starfish 4.snake

Why is it incorrect to say that mitochondria function only as energy factories with cell

What evidence did mendel find that supported his law of independent assortment? a. some traits are controlled by several different genes. b. a trait can be passed on from a parent to an offspring. c. most traits have a dominant form and a recessive form. d. different traits are passed on independently of each other.