"D. Core
The core of the Sun is where energy is produced when Hydrogen atoms are converted into molecules of Helium. The extreme pressure and temperature within the core make this conversion possible. This conversion is known as fusion. Within the Sun's core, fusion produces the most appreciable amount of heat energy."
Gametophyte
the haploid male (sperm) and female (egg) sex cells; in plants, formed by mitosis of haploid cells in the gametophyte.
See if any of the organisms lived before the others by measuring the age
of their fossils using some means, like radioactive dating.
<span>An ecosystem is made up of animals, plants and bacteria as well as the physical and chemical environment they live in. The living parts of an ecosystem are called biotic factors while the environmental factors that they interact with are called abiotic factors.</span>
DNA is a long molecule that consists of two strands of nucleotides twisted together in a long spiral called a double helix<span>. 1. Each </span>nucleotide<span> contains a sugar, a phosphate, and one of the four </span>bases<span>: (A = adenine, ___ = cytosine, ___ = guanine, or ___ = thymine). </span>2<span>.</span>
