The Sun is the primary source of energy for Earth's climate system is the first of seven Essential Principles of Climate Sciences.
Principle 1 sets the stage for understanding Earth's climate system and energy balances.
The Sun warms the planet, drives the hydrologic cycle, and makes life on Earth possible.
Answer:
The cell must replicated DNA because when the cell divides, the daughter cells must have identical copies of DNA. DNA replication occurs in the S phase during interphase of the cell cycle.
Answer:
zygote, fertilization
(haploid) spores, meiosis
a pollen tube
