All members of the plant kingdom contain chlorophyll. Xylem is composed of straw-like tubes conducting water and minerals upward in a plant. Growing regions where cells divide in plants are known as tropisms. The age of herbaceous plants can be determined by rings in the stem. The male part of a flower is the stamen.
All flowers have both male and female parts.
Pollination and fertilization are the same thing. A seed is a ripened ovary. There are seven classes of vertebrates. Sharks have a cartilage skeleton. Ninety five percent of all fish are in the class agnatha.