Which of the following vertebrates are ectothermic?
hummingbirds
newts
kangaroos
horses

The correct answer for the question that is being presented above is this one: "newts." The vertebrate that is ectothermic is a newt. A newt is a semiaquatic amphibian of the family Salamandridae, although not all aquatic salamanders are considered newts. Ectothermic is an animal that is dependent on external sources of body heat.

This happens during meiosis I, in the Anaphase I stage. Meiosis is a type of cell division in sexually reproducing organisms consisting of two rounds of cell division ( meiosis I and meiosis II) but only one round of DNA replication, result in cells with half the number of chromosomes sets as the original cell. In meiosis I homologs pair and segregate away from each other, the cell division in meiosis that separates homologous chromosomes, and after that the cells are haploid.