23. When the sperm cell then meets the egg, the 23 chromosomes that each sex cell have form the 46 total chromosomes that each human being has.
Nitrogen represents nearly 70% of air in the atmosphere <span />
Answer:
No. Because then every 2 years or so we would have to replace everything because the resource is limited
Explanation:
The graph records every electrical phase of the heartbeat, and each beat is triggered by pacemaker cells. A EKG not only records the electrical phase, but it records the strength and timing of every impulse generated from the upper right chamber of the heart. Each of these recordings can be quickly and easily evaluated to determine whether or not there is an abnormality but this can only be recorded if the abnormality is recorded during the test.
Answer:
The geographical separation (i.e. different islands) in the Galápagos archipelago represented a barrier to the gene flow among Darwin's finches, this barrier has had significant consequences on the phenotypic features of these species and contributed to their reproductive isolation. Moreover, the geographical separation also prevented competitive exclusion among species
