19) Through scientific research, genetic technologies have advanced the study of gene sequences. Which is a main benefit of gene therapy technology? a. The ability to cure genetic diseases by replacing defective genes
b. The ability to genetically design organisms that have never existed
c. Understanding how human genes turn on and off to make carbohydrates
d. Making genetically superior plants and animals to benefit the entire world.

15 points come and ! which characteristic describes all bacteria? a rod-shaped b microscopic c multicellular d autotrophic

The phylogenetic tree illustrates the relationship between humans and our closest living relatives. the tree was based on biochemical comparisons, including dna and amino acid sequences. according to the biomolecular data, we could infer that a) the four organisms do not have a common ancestor. b) humans are more closely related to chimps than any other apes. c) chimps are more closely related to gorillas than they are to humans. eliminate d) there is no evidence if any relationship between the four branches on the tree.

Ihave no idea how to solve these. plus there's another question that is 2) a 10 kilogram meteorite is collected in space and brought back to earth. it is composed of 1.25 kg of uranium-238 and 8.75 kg of lead-206. how many u-238 half lives have passed? what is the approximate age of the meteorite?