Answer:
Option (a).
Explanation:
Phylogentic tree may be defined as the the diagrammatic representation of the evolutionary relationship of the organism. The phylogenetic trees are made on the hypothesis and do not explain any fact.
The branching in the phylogenetic tree determines the evolution of the species from the common ancestor. The common ancestor is located at the base of the phylogenetic tress. Since, Ardipithecus ramidus is located at the base it shows that Ardipithecus ramidus is a common ancestor.
Thus, the correct answer is option (a).
D
Higher the inflation equals lower the value of dollar
Answer:
Plasma membrane acts as a selectively permeable barrier between cell components and external environment. If plasma membrane breaks down, it would result in the release of cellular components including cell organelles and cytoplasm in the external environment ultimately leading to the cell death.
Question: Why are two phases of meiosis necessary?
Answer: In order to both reduce the chromosome number and separate sister chromatids.
I don't know if this helps, but I hope it did. Have a good day. c;
Pre-frontal Cortex (PFC)
The PFC is often one of the last regions of the cerebral cortex to fully develop. It is the area of the brain most associated with executive function, logic, reason, and some anticipation of consequences.
Research estimates that most females' PFC is nearly fully developed by ages 16-21; however, males lag in this development of their PFC by an average of ages 19-24.
Thus, before legal age (18), minors (males > females) are more apt to partake in risk-taking behaviors.