Which correctly matches the structure in the leaf to the material it carries to the leaf for photosynthesis? A. veins carry water, chloroplasts take in carbon dioxide, stomata take in solar energy
B. veins carry water, stomata take in carbon dioxide, chloroplasts take in solar energy
C. veins carry sugar, stomata take in oxygen, chloroplasts take in solar energy
D. veins carry water, stomata take in oxygen, chloroplasts take in sugar

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.