Answer:
scientists form opinions based on evidence and decide how the idea should change.
Explanation:
scientific rarely change , because they are based on extensive edivence. new evidence leads to modification of ideas
X: Ozone layer destruction
Y: Mass extinction
It refers to making or crating new genes in form of mutation
in duplicates of old genes. It is also a mechanism in major way through new
genetic material is generated during evolution. The duplication happens in
event termed unequal crossing over or recombination between misaligned
homologous chromosomes during meiosis.
<span>These types of organisms are not found in the savanna, chickens are identified by their gender, size, weight, colors, and shape and according to their species is known when they can inhabit the savannah, usually, these chickens are not Savannah</span>
