Biochemists study and compare the molecular interactions within an organism that enable it to grow, make and store energy, and reproduce. ... Plant Kingdom The plant kingdom comprises of about 260,000 known species of mosses, liverworts, ferns, herbaceous and woody plants, bushes, vines, trees, and various other forms that cover the Earth and are also found in waters. ... They are composed of an accumulation of the remains of coral "invertebrates with stony skeletons "calcareous red algae, and mollusks. ... Today thousands of different types of fungi grow on and absorb food fr...

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Evolution is in progress. 3.As we survey the living members of the plant kingdom there is a tendency to think in terms of primitive and advanced groups and that one group represents the ancestor of another: a moss evolved into a fern which evolved into a conifer and so on until we reach the flowering plants. ... One cell in the sporangium grows and then goes through meiosis, producing four haploid megaspores. This megaspore continues to grow, and its nucleus divides by mitosis three times, resulting in one large cell with eight haploid nuclei. ... Seeds that are randomly positioned when plante...

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• Grade Level: High School

History The first European explorer to encounter Costa Rica was the Great Navigator himself, Christopher Columbus. The day was September 18, 1502, and Columbus was making his fourth and final voyage to the New World. As he was setting anchor off shore, a crowd of local Carib Indians paddled out in canoes and greeted his crew warmly. Later, the golden bands that the region's inhabitants wore in their noses and ears would inspire the Spaniard Gil Gonzalez Davila to name the country Costa Rica, or Rich Coast. Many people give the credit of naming Costa Rica to Christopher Columbus because ...

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• Grade Level: Undergraduate

For example, self-proclaimed European witches claimed that a "small blue or red puncture, sometimes a larger mark depicting the foot of a hare, or body of a toad, symbolized the connection of the wearer with devil worship" (Hambly, p. 45, 1925). ... Fern stalks were used when eating to avoid touching the food with hands, and any gourd the taboo person drank from could never be used again. ...

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Important Facts the smallest unit of life is the cell instructions for development are contained in DNA collectively, all of the chemical processes in a cell are called metabolism producers often obtain energy from the sun homeostasis refers to the ability to maintain a constant internal environment cells in domains archaea and eubacteria lack nucleii plants are multicellular producers an educated guess might be called a hypothesis science is based on evidence philosophy is not a step in the scientific method an atom is the smallest unit of substance that retains the properties of the subst...

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• Grade Level: High School