About 100 million

About 1 billion

About 207 million

About 500 million

Thalamus

Cerebrum

Medulla oblongata

Hypothalamus

Meristematic phase, where cells are undifferentiated.

Elongation phase, focusing mainly on cell enlargement.

Divisional phase, marked by rapid cell division.

Maturation phase, which involves cell specialization.

It increases global oxygen levels

It stabilizes species interactions

It alters the timing of biological events and disrupts ecological relationships

It creates more natural habitats

The umbilical artery always carries oxygenated blood.

All arteries carry oxygenated blood without exception.

The pulmonary artery carries deoxygenated blood from the heart to the lungs while most arteries carry oxygenated blood.

Both the pulmonary vein and artery carry deoxygenated blood.

They continuously pump water into the cells regardless of environmental conditions.

They facilitate the direct exchange of water vapor and carbon dioxide between the inside and outside of the leaf.

They prevent any gas exchange to conserve water.

They seal the internal air spaces to trap moisture.

They naturally arise without the need for gene alteration.

They allow farmers to control unwanted organisms while preserving crop viability.

They prevent any genetic modifications in crops and animals.

They eliminate the need for any chemical treatments.