Chromosomespre-testactivehow can the two chromosomes that make up a homologous pair differ? o they can contain different alleles for the same trait. they can contain genes that code for different traits. they can contain the same genes in different orders. they cannot differ in any way when homologous.

Ascientist is investigating the effects of salinity on fish development. he places fertilized fish eggs in an aquarium that contains low salinity and observes their development. what factor would improve experimental design the most? place the fish eggs in the open ocean because that is the natural habitat include another aquarium that has normal salinity to compare to the low salinity aquarium include an aquarium that replaces salt with sugar to confirm that the effects are specific to salt grow algae with the fish eggs in order to provide adequate nutrients to the developing embryos

Sperm are ejaculated from the corpora cavernosa of the penis. true or false

Earth is tilted on its axis. which of these would not exist if earth had no tilt?