Which side of the heart is a high-pressure system that pumps arterial blood to the systemic circulation?

How does the molecular clock work? a. it analyzes the brain functionality of two different species.b. it examines and compares the physical characteristics of two different species.c. it illustrates relationships between two different species.d. it compares the number of mutations that exist in the dna of two different species.

Individuals do not compete directly for resources, but are prey for the same predator

This is collection of data made by comparing objects in standard units. in science, the units are metric.