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:
A.endometrium
Explanation:
The endometrium is the inner layer that lines the uterus. It is made up of glandular cells that make secretions. The myometrium is the middle and thickest layer of the uterus wall.
Answer:
4 min to 6 min
Explanation:
Most people have a four-to-six minute supply of oxygen in the body at any one time.
However, a group of people called the Bajau have divers who can stay underwater for as long as 13 min at depths of around 60 m.
The gender spectrum is pretty much like the color spectrum. You can identify as being more or less male/female than another males/females.
Your gender can also be fluid, and change over time.
All of this is according to Gender Theory.
Population living in one place form a Community!
