This phylogenic tree is composed based on molecular data (rRNA). What statements can we infer are true about the organisms throughout the tree?

options:
Because the tree is rooted, all branches share a common ancestor.
All organisms have some sort of cellular structure/organization.
All Eukaryotes evolved from Bacteria.
Since the organisms contain RNA, they share the same DNA.
If the organisms contain RNA, the share the same four nitrogen bases.

According to the law of conservation of energy, energy can neither be created nor destroyed. if this is true, why is there less energy in the top of the energy pyramid than there is in the bottom of the energy pyramid?

Several billion years ago which gas was the least prevailant in the atmosphere

Which statement is not an accurate description of meiosis? a) meiosis produces offspring that are genetically diverse. b) meiosis produces offspring that are identical to the parent. c) in sexual reproduction half of the genetic material comes from the father (sperm) and half of the genetic material comes from the mother (egg). d) meiosis decreases the number of chromosomes by half so that when a sperm fertilizes an egg, the resulting zygote has the correct number of chromosomes.