Answer:
Its Genetic drift
Explanation:
Genetic Drift is a random decrease in genetic variation
All animals share a common ancestor.
Explanation:
According to various phylogenetic gene sequence analysis, there are various evidences that proved all animals originated from a common ancestor.
Initially, it was stated that all organisms descended from a single cell which then gave rise to multicellular organisms. Organisms that descend from a common ancestor are closely related and grouped.
The lineage of the common ancestor can be traced in the neoproterozoic era.
The last common ancestor or the basal animal was sea sponge according to some researchers. The last universal common ancestor is called as the concestor.
Answer: RNA and DNA are the main ones, but mRNA and rRna are some, too
Explanation:
The fertilized egg begins a rapid descent to the uterus. The period of rest in the tube appears to be necessary for full development of the fertilized egg and for the uterus to prepare to receive theegg. ... At the end of this transition period, the embryo becomes a mass of very organized cells, called a blastocyst.
The problems that will receive priority are the physiological needs such as air, food and water.
Maslow's hierarchy of needs is a theory in psychology which organizes people's needs according to their priorities. It is represented as a pyramid with five steps which include: physiological(at the base), safety, belongingness, esteem and self actualization.
The physiological needs at the base of the pyramid are the first priorities.
