Answer:
The correct option is A. they evolved from land mammals.
Explanation:
Evolution can be described as a process through which organisms in a species change over a period of time due to the natural selection of the environment. Those organisms that have many similarities in their functions or structures are considered closer to one another and have the same common ancestors.
The properties mentioned in the question about cetaceans resembles the properties of land mammals. For example, cetaceans lack gills and breathe air. Land mammals also do not have gills and need to respire for living. The cetaceans have fin bones which are similar to the limb bones in the land mammals. Hence, these observations show that cetaceas have evolved from land mammals.
Answer:
incomplete dominance because neither allele for tail length is dominant
I'm pretty sure
Explanation:
googIe
Answer:
The lens
It helps to focus on objects and light
Answer:
given below
Explanation:
Genetic engineering is the process of cutting DNA into fragments and inserting the fragments with a desired gene into another organism of the same or different species
Answer:
Okazaki fragments are short sequences of DNA nucleotides which are synthesized discontinuously and later linked together by the enzyme DNA ligase to create the lagging strand during DNA replication.
Explanation:
