AP BIOLOGY

Detailed explanation-1: -Evergreen trees that produce cones are called conifers. There are more than 600 species of conifers-which include pines, firs and spruce-each with its own type and size of cones. Species survive by reproducing. Conifers reproduce as their seeds spread, usually by wind.

Detailed explanation-2: -Pine cones only come from pine trees, although all conifers produce cones. Pine cones and pine trees belong to a group of plants called gymnosperms and date back to prehistoric times. Gymnosperms are a group of plants who have naked seeds, not enclosed in an ovary.

Detailed explanation-3: -Pine (Pinus) trees are known for the large cones they produce which are commonly used in craft projects. These cones appear on both male and female pine trees and shrubs.

Detailed explanation-4: -Pine cones are how the trees reproduce. Each pine tree produces male cones and female cones. The male cones produce pollen, are typically very small and grow mostly on the lower branches.

Detailed explanation-5: -Conifers have two types of cones: pollen cones and seed cones. Depending on the tree species, you may find both types of cones on the same tree or on different trees. When seed and pollen cones are found on different trees, the species is called dioecious. Female cones have scales under which the ovules are found.