Answer:
Changes that occur in species, over a long period of time and that include the the replacement of unfavorable characteristics by helpful variations lead to evolution (second option).
Explanation:
Evolution, in terms of biology, consists of the genetic, anatomical and functional changes that occur in individuals of different species, acquiring useful characteristics that replace unfavorable characteristics, due to processes such as natural selection, proposed by <u>Charles Darwin</u>.
<u>Biological evolution</u> raises the existence of a common ancestor, from which all current known species are known, and an evolutionary line for each of those species. Evolution is considered the basis of <u>biodiversity</u>, due to the genetic changes it has produced over many years.
Learn more:
Evolution brainly.com/question/1596703
Answer:
blastocyst / blastula forms
Answer: C. polyp
Explanation: The polyp is a sac-like stage of a cnidarian, with the mouth and tentacles on top.
D i believe, i could be wrong though
