Noam is building an aquarium. he needs to install a system to isolate biological matter and keep the water from getting too dirty. the water is continuously fed through the separation system, and the clean filtrate is allowed to flow back into the aquarium. should he use a screen or a filter? explain at least one advantage and one disadvantage of each.

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

What is the difference between sex-linked traits and autosomal traits in humans? a. sex-linked traits can only be passed from fathers to sons, while autosomal traits can be passed on from both parents to offspring of any sex. b. sex-linked traits are passed on through the x and y chromosomes, while autosomal traits are passed on through the other 22 chromosomes. c. sex-linked traits only affect females, while autosomal traits affect both males and females. d. sex-linked traits refer to genes that are on the x and y chromosomes, while autosomal traits refer to genes on all 23 chromosomes.

Dna replication or repair occurs in a cell in all of thw following situations except when